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一、工模具新鋼種——超硬型高速鋼

   研究和發展模具新鋼種,是改善和提高模具鋼的強韌性,延長模具的使用壽命的重要途徑。我國模具工業在迅速發展,我國的材料工作者在借鑒國外先 進技術的基礎上結合本國資源情況和特點,引進和研製了不少新型模具鋼。經過生產上的考核篩選,一些性能優異、工藝性能也比較好的鋼種受到模具製造和使用單 位的歡迎,使模具的使用壽命達到甚至超過國內外同類模具的水平,如北京鋼鐵學院與大冶鋼廠研製的無Co超硬高速鋼W12Cr4Mo3V3N(簡稱V3N) 的各項性能優良,獲中華人民共和國國家發明獎,中華人民共和國專利(91102252), V3N模具性能比現用普通高速鋼提高2~10倍,相當於國際市 場現用含 10%Co的高速鋼,已成功地推廣應用在工模具生產中,可使壽命成倍增加。

二、V3N成分及性能特點

  W12Cr4Mo3V3N(簡稱V3N)是鎢-鉬系含氮無鈷超硬型高速鋼,V3N的化學成分c:1.21%; W: 11.88%; Mo: 2.95%; Cr4.00%; V:2.87%; N: 0.075%.新型超硬高速鋼V3N成分設計特點是:

  高C: C對冷作模具鋼的強韌性、耐磨性有決定性的影響。含碳量增加,則抗壓強度及耐磨性增加。因此,抗衝擊及高強韌冷作模具鋼含碳量較高。

高V: V強烈細化晶粒,強烈提高耐磨性、紅硬性及二次硬化能力。但含量過多會明顯惡化可鍛性及磨削性。

含N:N可細化晶粒,又有析出強化的作用,且機械性能及焊接性能都較好。

   主要技術性能:V3N鋼具有硬度高、耐磨性好、高的紅硬性和一定的韌性,在冷作模具鋼上應用效果十分顯著。該鋼與含鈷高速鋼相比,價格低廉且 易加工,通過適當的熱處理,可得到高硬度(HRC67~70)、高紅硬性(625℃4小時,HRC63~65)和高耐磨性,韌性和抗彎強度均不低於普通型 高速鋼,可克服模具刃口塌陷和崩裂等早期損壞。

三、V3N鋼模具的加工工藝

  模具熱處理方法和加工工藝的選擇同樣要根據模具的工作條件、失效方式和對性能的不同要求來確定。應不斷改善熱處理設備,改進熱處理工藝,使材料的強度、韌性得到最佳配合,並嚴格遵循熱處理工藝,控制加熱溫度、時間、冷卻速度,從而保證模具的使用性能。

  1,鍛造

  V3N鋼含有大量的一次碳化物和二次碳化物,若保留在淬火組織中,將急劇降低模具所有壽命。只有通過對原材料改鍛,擊碎碳化物,才能使其呈細小、均勻的形貌分佈於鋼基體,提高整體力學性能。

  V3N鋼導熱性差,鍛坯加熱時應充分預熱,始鍛溫度1170℃,終鍛溫度950℃,設備可採用250kg(小件)和400kg空氣錘,開始採用輕錘快打,中間用重錘打,最後慢打輕打,鍛後於石棉粉箱中緩冷取出後即進行退火處理。

  2,鍛後退火

  可採用等溫退火或普通860 oC退火4小時. 機械加工

  鍛後硬度較高,採用等溫或普通退火後,機加可順利進行,淬火後因工硬度較高,故工件成型磨削難度較大,可採用鐠鈮剛玉加鉻製作的砂輪進行磨削。

  熱處理工藝

   V3N鋼在1220~1230℃淬火時,由於存在未熔碳化物,硬度偏低,系淬火溫度不足;在1260~1270℃淬火時,晶粒明顯過大,系過 熱現象。選擇1230~1240℃淬火加熱溫度既能使碳化物和合金元素充分溶解到奧氏體中去,又能保持較細晶粒(10~10級)。

V3N 超硬高速鋼模具部件採用1220~1230℃經550℃四次回火,硬度可控制在HRC64~67,具體可根據零件尺寸的大小從熱處 理工藝上進行調整,達到硬度和強度較理想的配合,V3N超硬型高速鋼淬火後有較多殘餘奧氏體,據測定約為25%~30%,必須盡量消除減少,為此進行多次 高溫回火使之發生馬氏體轉變。進行4次高溫回火後,大部分殘餘奧氏體發生了馬氏體轉變,產生二次硬化效應。V3N鋼二次硬化效應溫度比普通高速鋼高 30~40℃,這一特性十分寶貴,表明V3N鋼有更高紅硬性。

精加工後的深冷處理

  經深冷處理後,由於殘留奧氏體向馬氏體轉變以及超細碳化物的析出,模具零件硬度和耐磨性將進一步改善,耐磨性可提高40%,既縮短回火時間節省了能量,又明顯提高了模具使用壽命。

  高速鋼模具深冷處理工藝過程為:模具除油污→放入保溫罐中→少量多次注入液氮(196℃)→保溫浸泡2.5h→取出模具迅速放入60~70℃熱水中。

  四、V3N鋼在冷作模具的應用與效果

  V3N超硬冷作模具壽命均比 Cr12MoV、Cr12等常用模具壽命提高3~5倍,比現用普通高速鋼提高2~10倍,經濟效益更為顯著,V3N鋼製模具性能相當於國際市場現用含10%Co的高速鋼。

  某廠硅鋼片沖模原來都是採用CrWMn、Cr12MoV等鉻鋼製作的,但由於硅鋼等硬面脆,故模具耗損量大,採用V3N鋼製作模具,經濟效果明顯
五、結語

V3N超硬高速鋼各項性能優良,適合加工沖裁模等冷作模具,壽命顯著提高。

V3N鋼熱加工工藝較嚴格,1220~1230℃淬火,550℃4次1小時回火,精加工後再經深冷處理可獲得高硬度、高耐磨性和良好的韌性配合,使用過程中還可定期對凹模進行去應力回火以延長壽命。

歡迎來到Bewise Inc.的世界,首先恭喜您來到這接受新的資訊讓產業更有競爭力,我們是提供專業刀具製造商,應對客戶高品質的刀具需求,我們可以協助客戶滿足您對產業的不同要求,我們有能力達到非常卓越的客戶需求品質,這是現有相關技術無法比擬的,我們成功的滿足了各行各業的要求,包括:精密HSS DIN切削刀具協助客戶設計刀具流程DIN or JIS 鎢鋼切削刀具設計NAS986 NAS965 NAS897 NAS937orNAS907 航太切削刀具,NAS航太刀具設計超高硬度的切削刀具BW捨棄式鑽石V卡刀BW捨棄式金屬圓鋸片木工捨棄式金屬圓鋸片PCD木工圓鋸片醫療配件刀具設計汽車業刀具設計電子產業鑽石刀具全鎢鋼V卡刀-電路版專用全鎢鋼鋸片焊刃式側銑刀焊刃式千鳥側銑刀焊刃式T型銑刀焊刃式千鳥T型銑刀焊刃式螺旋機械鉸刀全鎢鋼斜邊刀電路版專用鎢鋼焊刃式高速鉸刀超微粒鎢鋼機械鉸刀超微粒鎢鋼定點鑽焊刃式帶柄角度銑刀焊刃式螺旋立銑刀焊刃式帶柄倒角銑刀焊刃式角度銑刀焊刃式筒型平面銑刀木工產業鑽石刀具等等。我們的產品涵蓋了從民生刀具到工業級的刀具設計;從微細刀具到大型刀具;從小型生產到大型量產;全自動整合;我們的技術可提供您連續生產的效能,我們整體的服務及卓越的技術,恭迎您親自體驗!!

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Bewise Inc. www.tool-tool.com Reference source from the internet.

摘要:對國際先進製造技術研討會(ISAMT』2001)暨中國高校切削與先進製造技術研究會第七屆年會的有關論文進行了綜合評述,分析了國內切削加工和刀具技術的現狀,並對今後的發展策略提出了建議。

1 引言
國 際先進製造技術研討會(ISAMT』2001)暨中國高校切削與先進製造技術研究會第七屆年會於2001年10月在南京舉行。大會共徵集到論文200多 篇,其中關於切削技術方面的論文33篇,刀具與刀具材料方面的論文32篇,論文內容涉及製造領域中現代切削技術的新發展、刀具新材料和新結構、切削機理實 驗研究以及計算機技術在切削與刀具領域的開發與應用等。現對會議宣讀和交流論文中的相關內容作一綜合評述。


2 現代切削技術的發展
20世紀90年代以來,激烈的市場競爭推動以機械製造技術為先導的先進製造技術以前所未有的速度和廣度向前發展。高生產率和高質量是先進製造技術追求的兩大目標。高速切削、精密和超精密切削是當前切削技術的重要發展方向,已成為切削加工的主流技術。


高速切削技術
高速切削的主要內容包括高速軟切削、高速硬切削、高速干切削、大進給切削等。高速切削是一個相對概念,對其切削速度範圍的界定目前國內外專家尚未達成共識。通常認為高速加工時的切削速度比常規切削速度高5~10倍以上。


中 國工程院院士艾興教授在所作「高速切削刀具材料的發展及其合理應用」主題報告中指出,在高速切削時,隨著切削速度的提高,切削力減小,切削溫度的增加漸 趨緩慢,生產效率和加工質量提高,從而可降低製造成本,縮短產品開發週期。高速切削大致可使切削力減小15%~30%,表面質量提高1~2級,切削速度和 進給速度提高15%~20%,製造成本降低10%~15%。高速切削現已廣泛應用於航空、航天、汽車、摩托車、模具、機床等工業中對鋼、鑄鐵、有色金屬及 其合金、高溫耐熱合金、碳纖維增強塑料等複合材料的加工中,其中以鋁合金和鑄鐵的高速加工最為普遍。

目 前高速加工各種材料的切削速度:普通鋼和鑄鐵為 500~2000m/min(鑽、鉸削100~400m/min,攻絲100m/min,滾齒300~600m/min),淬硬鋼(35~65HRC)為 100~400m/min,結構鋁合金為3000~4000m/min,高硅鋁合金為500~1500m/min,鎳基、鈷基、鐵基和鈦合金等超級合金為 90~500m/min。高速加工追求的切削速度目標為:銑削加工:鋁及其合金為10000m/min,鑄鐵為5000m/min,普通鋼為 2500m/min;鑽削加工(機床主軸轉速):鋁及其合金為30000r/min,鑄鐵為20000r/min,普通鋼為10000r/min。大進給 目標:進給速度Vf=20~50m/min,每齒進給量fz=1.0~1.5mm/z。


高 速切削技術不只是切削速度的提高,它的發展主要取決於刀 具技術(包括刀具材料、塗層刀具結構、刀柄和裝夾系統、刃磨和動平衡、檢測和監控系統等)和高速 機床技術(包括電主軸、直線電機進給系統、數控與伺服系統、軸承及潤滑、刀庫等)的進步,而正確選用刀具與機床經常起著決定性作用。德國 Darmstadt工業大學H.Schulz教授在「高速切削機床」一文中詳盡介紹了選用高速機床時應注意的問題,給與會代表很大啟發。


隨 著環境 保護法律法規的嚴格實施,作為綠色製造工藝的干切削日益受到人們的高度重視。據國外企業統計,在集中冷卻加工系統中,切削液占加工總成本的14% ~16%,刀具成本僅佔2%~4%。據測算,如果20%的切削加工採用干式加工,製造總成本可降低1.6%。因此,干切削是未來切削加工的發展方向。目前 倡導的干切削並不是簡單地去掉原有工藝中的切削液,也不是消極地通過降低切削參數來保證刀具使用壽命,而需要採用耐熱性更好的新型刀具材料及塗層,設計合 理的刀具結構與幾何參數,選擇最佳切削速度,形成新的工藝條件。干切削是實現清潔高效加工的新工藝,是製造技術向高速切削髮展總趨勢的組成部分,也是隨著 人類社會進步和生產力發展而出現的新型切削方式,它的推廣應用推動著刀具材料、塗層技術、機床結構、加工條件和刀具結構技術的不斷發展。目前,干切削技術 在車削、鏜削和銑削上的應用日益廣泛,在鑽削、拉削和滾齒方面也有重大突破。

上海大眾汽車有限公 司、上海交通大學、哈爾濱理工大學、哈爾濱工業大學等單位 在「干切削及其應用」等有關論文中詳細介紹了干切削的機理和實施該工藝的途徑,以及採用激光輔助加工干切削、使用最少量潤滑液(MQL)的准干切削 (Near Dry Cutting)、用壓縮空氣冷風切削以及採用氮氣進行干切削等加工方法。


精密和超精密切削
發 展尖端技術、國防工業 和微電子工業都離不開通過精密和超精密加工製造的精密零件和產品。通常將加工精度在0.1~1μm,加工表面粗糙度在 Ra0.02~0.1μm的加工稱為精密加工;而將加工精度高於0.1μm,加工表面粗糙度小於Ra0.01μm的加工稱為超精密加工。超精密加工可達到 納米(nm)級水平。該領域主要包含三個分支:①精密和超精密切削加工;②精密和超精密磨削加工;③精密電子束和離子束等特種加工。


用 金剛石刀具 實施超精密切削已由過去只能加工銅、鋁及其合金等有色金屬,擴展到加工塑料、陶瓷和複合材料。為了切除極薄切屑,要求金剛石刀具切削刃的刃口 半徑p極小,經精密研磨的單晶天然金剛石刀具的刃口半徑p<0.05~0.1μm,研磨質量高的甚至可達幾個nm,可實現納米級切削。> 45HRC)和冷硬鑄鐵等硬材料、以車代磨等加工領域跨入到銑削加工領域。該刀具已在上海通用汽車公司(SGM)新建的 發動機柔性生產線上使用,取得了良好效果。該刀具銑削髮動機缸體平面時,切削速度高達2000m/min,刀具壽命為普通PCBN刀具的4倍。Seco Tools公司還推出了結構新穎、具有冷卻通道、可更換硬質合金頭部的鑽頭,其頭部有三種不同幾何形狀,P型硬質合金刀頭適用於切削鋼,K型硬質合金刀頭 適於切削鑄鐵,而刀刃銳利的M型刀頭適於鑽削高強度鋼和耐腐蝕鋼。


本次會議對傳統刀具和高 效刀具的設計、製造及使用也進行了技術交流。如廣東韶關 學院設計的徑向錯位量較大(為每轉進給量的2~3倍)的單組階梯式可轉位面 銑刀、燕山大學研製的可加工硬度55HRC以上大內齒輪(模數m=12mm,齒數z=97)的負前角刮削硬質合金球形滾刀、西安交通大學設計的前角可控的 等螺旋角錐形立銑刀、山西太原理工大學設計的齒向開槽的新型插齒刀等,在結構上都有一定特點與創新,用於生產中均取得了較好效果。


電鍍金剛石鉸刀加工出的孔具有尺寸分散度小、幾何形狀精度高(可達2μm)、表面粗糙度值小(5 切削機理的研究與刀具CAD
為促進高速切削、精密和超精密切削技術的發展,本次會議上交流了許多有關切削機理及其實驗研究方面的論文。


南 京航空航天大學對高溫合金、鈦合金、不銹鋼等難加工材料的高速切削進行了系統試驗研究,發現切削變形為集中剪切滑移,且滑移區很窄,形成鋸齒狀不連續切 屑,其變形機理完全不同於連續性切屑。為此,作者根據最小能量原理,利用集中剪切滑移的臨界條件,推導出集中剪切滑移條件下的切削方程式,為進一步發展高 速切削工藝技術建立了理論基礎。


山東大學探討了高速切削時工件材料與刀具材料的匹配、切削方式、刀具幾何參數、切削參數、振動和切削液等因素對已加工表面粗糙度的影響,為高速切削加工時切削參數的選擇和表面質量的控制提供了依據。


哈 爾濱理工大學、哈爾濱工業大學等對PCBN刀具干切削不同硬度的GCr15軸承鋼的切削力、切削溫度、已加工表面完整性等進行了切削試驗研究,發現存在 區分普通切削與硬態切削的臨界硬度,並得出GCr15軸承鋼的臨界硬度為50HRC。在臨界硬度附近進行切削時,刀具磨損嚴重,加工表面質量最差。
上海水產大學建立了「工程材料切削加工性的人工神經網絡綜合評判模型」,各評價指標的權值是從足夠多的訓練樣本中提出的,避免了人為確定權值和隸屬函數的主觀性,使評價結果更具客觀性和可比性。


大連理工大學建立了球頭銑刀銑削的計算機預報模型,並進行了數值仿真研究,對改進銑刀設計、優化切削用量和監控切削參數均有現實意義。


Jr.S.Prakash等學者在會上介紹的「微型硬質合金銑刀切削時刀具壽命的預報模型」,J.Wang等人介紹的「斜角切削時允許後刀面磨損的切削預報模型」等均與實驗結果相吻合,為精密切削和微量切削提供了理論依據。


CAD/CAM技術的應用可保證刀具設計和製造的高效率和高質量,本次會議上也有不少這方面的論文。例如,焦作工學院在AutoCAD2000平台上開發了一種「成形車刀CAD」軟件,對成形車刀的智能設計、參數化繪圖具有重要意義。


此外,還有許多關於刀具幾何參數、切削用量和工藝過程優化、切削液、切削數據庫(如北京第一機床廠在CIMS環境下建立的網絡數據庫)、振動切削等內容的論文也在會上進行了交流。


6 差距與建議
雖 然近十年來我國工具工業有了長足進步,切削技術迅速提高,但與國外先進水平相比仍有巨大差距。據專家分析,我國切削加工及刀具技術的水平與工業發達國家 相比大致要落後15~20年。近年來國內轎車工業引進了幾條具有國際20世紀90年代水平的生產線,但所用工具的國內供給率只能達到20%的低水平。為改 變這種狀況,我國工具行業需要加速進口刀具國產化的步伐,必須更新經營理念,從主要向用戶「賣刀具」轉到為用戶「提供成套切削技術,解決具體加工問題」的 經營方向上來。要根據自身產品的專業優勢,精通相應的切削工藝,不斷創新開發新產品。

用戶行業則應 增大刀具費用的投入,充分利用刀具在提高效率、降低成 本、縮短Intranet/Extranet,實現最大程度的資源(如切削數據庫)共享。建議有關部門將產、學、研各部門的科研力量組織起來,集中優勢, 一方面積極引進國外先進刀具製造技術,提高刀具產品水平,加快刀具產品(尤其是數控刀具產品)的國產化步伐;另一方面應結合生產實際,系統地推廣使用各種 先進刀具和先進切削技術。我們相信,通過正確的政策引導和企業的有序競爭,完全有可能使我國的切削加工與刀具技術趕上國外先進水平,並做到有所發展與創 新。

歡迎來到Bewise Inc.的世界,首先恭喜您來到這接受新的資訊讓產業更有競爭力,我們是提供專業刀具製造商,應對客戶高品質的刀具需求,我們可以協助客戶滿足您對產業的不同要求,我們有能力達到非常卓越的客戶需求品質,這是現有相關技術無法比擬的,我們成功的滿足了各行各業的要求,包括:精密HSS DIN切削刀具協助客戶設計刀具流程DIN or JIS 鎢鋼切削刀具設計NAS986 NAS965 NAS897 NAS937orNAS907 航太切削刀具,NAS航太刀具設計超高硬度的切削刀具BW捨棄式鑽石V卡刀BW捨棄式金屬圓鋸片木工捨棄式金屬圓鋸片PCD木工圓鋸片醫療配件刀具設計汽車業刀具設計電子產業鑽石刀具全鎢鋼V卡刀-電路版專用全鎢鋼鋸片焊刃式側銑刀焊刃式千鳥側銑刀焊刃式T型銑刀焊刃式千鳥T型銑刀焊刃式螺旋機械鉸刀全鎢鋼斜邊刀電路版專用鎢鋼焊刃式高速鉸刀超微粒鎢鋼機械鉸刀超微粒鎢鋼定點鑽焊刃式帶柄角度銑刀焊刃式螺旋立銑刀焊刃式帶柄倒角銑刀焊刃式角度銑刀焊刃式筒型平面銑刀木工產業鑽石刀具等等。我們的產品涵蓋了從民生刀具到工業級的刀具設計;從微細刀具到大型刀具;從小型生產到大型量產;全自動整合;我們的技術可提供您連續生產的效能,我們整體的服務及卓越的技術,恭迎您親自體驗!!

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In materials science, the strength of a material refers to the material's ability to resist an applied force. A material's strength is a function of engineering processes, and scientists employ a variety of strengthening mechanisms to alter the strength of a material. These mechanisms include work hardening, solid solution strengthening, precipitation hardening and grain boundary strengthening and can be quantified and qualitatively explained. However, strengthening mechanisms are accompanied by the caveat that mechanical properties of the material may degenerate in an attempt to make the material stronger. For example, in grain boundary strengthening, although yield strength is maximized with decreasing grain size, ultimately, very small grain sizes make the material brittle. In general, the yield strength of a material is an adequate indicator of the material's mechanical strength. Considered in tandem with the fact that the yield strength is the parameter that predicts plastic deformation in the material, one can make informed decisions on how to increase the strength of a material depending its microstructural properties and the desired end effect. Strength is considered in terms of compressive strength, tensile strength, and shear strength, namely the limit states of compressive stress, tensile stress and shear stress, respectively. The effects of dynamic loading is probably the most important practical part of the strength of materials, especially the problem of fatigue. Repeated loading often initiates brittle cracks, which grow slowly until failure occurs.

However, the term strength of materials most often refers to various methods of calculating stresses in structural members, such as beams, columns and shafts, when the equations of equilibrium are not sufficient to solve the problem. In such problems, known as statically indeterminate problems, the elastic or plastic resistance of the material to deformation must be considered when calculating stresses. In this sense, the word ``strength" could well be replaced by ``stiffness", but the usage goes back to at least 1930 and is not likely to go away any time soon.

[edit] Definitions

[edit] Stress terms

A material being loaded in a) compression, b) tension, c) shear.

A material being loaded in a) compression, b) tension, c) shear.

Uniaxial stress is expressed by

\sigma=\frac{F}{A},

where F is the force (N) acting on an area A (m^2). The area can be the undeformed area or the deformed area, depending on whether engineering stress or true stress is used.

  • Compressive stress (or compression) is the stress state when the material (compression member) tends to compact. A simple case of compression is the uniaxial compression induced by the action of opposite, pushing forces. Compressive strength for materials is generally higher than that of tensile stress, but geometry is very important in the analysis, as compressive stress can lead to buckling.
  • Tensile stress is a loading that tends to produce stretching of a material by the application of axially directed pulling forces. Any material which falls into the "elastic" category can generally tolerate mild tensile stresses while materials such as ceramics and brittle alloys are very succeptable to failure under the same conditions. If a material is stressed beyond its limits, it will fail. The failure mode, either ductile or brittle, is based mostly on the microstructure of the material. Some Steel alloys are examples of materials with high tensile strength.
  • Shear stress is caused when a force is applied to produce a sliding failure of a material along a plane that is parallel to the direction of the applied force. An example is cutting paper with scissors.

[edit] Strength terms

  • Yield strength is the lowest stress that gives permanent deformation in a material. In some materials, like aluminium alloys, the point of yielding is hard to define, thus it is usually given as the stress required to cause 0.2% plastic strain.
  • Compressive strength is a limit state of compressive stress that leads to compressive failure in the manner of ductile failure (infinite theoretical yield) or in the manner of brittle failure (rupture as the result of crack propagation, or sliding along a weak plane - see shear strength).
  • Tensile strength or ultimate tensile strength is a limit state of tensile stress that leads to tensile failure in the manner of ductile failure (yield as the first stage of failure, some hardening in the second stage and break after a possible "neck" formation) or in the manner of brittle failure (sudden breaking in two or more pieces with a low stress state). Tensile strength can be given as either true stress or engineering stress.
  • Fatigue strength is a measure of the strength of a material or a component under cyclic loading, and is usually more difficult to assess than the static strength measures. Fatigue strength is given as stress amplitude or stress range (Δσ = σmax − σmin), usually at zero mean stress, along with the number of cycles to failure.


[edit] Strain (deformation) terms

  • Deformation of the material is the change in geometry when stress is applied (in the form of force loading, gravitational field, acceleration, thermal expansion, etc.). Deformation is expressed by the displacement field of the material.
  • Strain or reduced deformation is a mathematical term to express the trend of the deformation change among the material field. For uniaxial loading - displacements of a specimen (for example a bar element) it is expressed as the quotient of the displacement and the length of the specimen. For 3D displacement fields it is expressed as derivatives of displacement functions in terms of a second order tensor (with 6 independent elements).
  • Deflection is a term to describe the magnitude to which a structural element bends under a load.

[edit] Stress-strain relations

  • Elasticity is the ability of a material to return to its previous shape after stress is released. In many materials, the relation between applied stress and the resulting strain is directly proportional (up to a certain limit), and a graph representing those two quantities is a straight line.

The slope of this line is known as Young's Modulus, or the "Modulus of Elasticity." The Modulus of Elasticity can be used to determine stress-strain relationships in the linear-elastic portion of the stress-strain curve. The linear-elastic region is taken to be between 0 and 0.2% strain, and is defined as the region of strain in which no yielding (permanent deformation) occurs.

  • Plasticity or plastic deformation is the opposite of elastic deformation and is accepted as unrecoverable strain. Plastic deformation is retained even after the relaxation of the applied stress. Most materials in the linear-elastic category are usually capable of plastic deformation. Brittle materials, like ceramics, do not experience any plastic deformation and will fracture under relatively low stress. Materials such as metals usually experience a small amount of plastic deformation before failure while soft or ductile polymers will plasticly deform much more.

Consider the difference between a fresh carrot and chewed bubble gum. The carrot will stretch very little before breaking, but nevertheless will still stretch. The chewed bubble gum, on the other hand, will plasticly deform enormously before finally breaking.

[edit] Design terms

Ultimate strength is an attribute directly related to a material, rather than just specific specimen of the material, and as such is quoted force per unit of cross section area (N/m²). For example, the ultimate tensile strength (UTS) of AISI 1018 Steel is 440 MN/m². In general, the SI unit of stress is the pascal, where 1 Pa = 1 N/m². In Imperial units, the unit of stress is given as lbf/in² or pounds-force per square inch. This unit is often abbreviated as psi. One thousand psi is abbreviated ksi.

Factor of safety is a design constraint that an engineered component or structure must achieve. FS = UTS / R, where FS: the Factor of Safety, R: The applied stress, and UTS: the Ultimate force (or stress).

Margin of Safety is also sometimes used to as design constraint. It is defined MS=Factor of safety - 1

For example to achieve a factor of safety of 4, the allowable stress in an AISI 1018 steel component can be worked out as R = UTS / FS = 440/4 = 110 MPa, or R = 110×106 N/m².

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Honda Motor Company, Limited
Honda Giken Kogyo Kabushiki-gaisha
本田技研工業株式会社
Type Public TYO: 7267 NYSE: HMC
Founded September 24, 1948
Headquarters Flag of Japan Tokyo, Japan
Key people Soichiro Honda, Founder
Takeo Fukui, CEO
Industry Automobile & Truck manufacturer & Motorcycle
Products automobiles, trucks, motorcycles, scooters, ATVs, electrical generators, robotics, marine equipment, jets and jet engines, and lawn and garden equipment. Honda and Acura brands.
Revenue $94.24 billion USD (2007)[1]
Net income $5.0 billion[1] USD (2006)
Employees 167,231 (2007)
Website Honda.com
Logos for Honda automobiles and Honda motorcycles.
Logos for Honda automobiles and Honda motorcycles.
Logos for Honda automobiles and Honda motorcycles.

Honda Motor Company, Limited (本田技研工業株式会社 Honda Giken Kōgyō Kabushiki-gaisha?, Honda Technology Research Institute Company, Limited) listen , shortened to Honda is a multinational corporation, engine manufacturer and engineering corporation headquartered in Japan.

The company manufactures automobiles and motorcycles, trucks, scooters, robots, jets and jet engines, ATV, water craft, electrical generators, marine engines, lawn and garden equipment, and aeronautical and other mobile technologies. Honda's line of luxury cars are branded Acura in North America and China. More recently they have ventured into mountain bikes.

Honda is the 5th largest automobile manufacturer in the world as well as the largest engine-maker in the world, producing more than 14 million internal combustion engines each year.[[2]]

Honda is headquartered in Tokyo, Japan. Their shares trade on the Tokyo Stock Exchange and the New York Stock Exchange, as well as exchanges in Osaka, Nagoya, Sapporo, Kyoto, Fukuoka, London, Paris and Switzerland. American Honda Motor Co. is based in Torrance, California. Honda Canada Inc. is headquartered in the Scarborough district of Toronto, Ontario, and is building new corporate headquarters in Markham, Ontario, scheduled to relocate in 2008. It was originally planned to be located in Richmond Hill, Ontario, but delays led them to look elsewhere.[2]Hero Honda, a joint venture between India's Hero Group and Honda, is the largest manufacturer of two wheelers in the world. Honda of Canada Manufacturing is based in Alliston, Ontario. Honda has also created joint ventures around the world, such as Honda Siel Cars India Ltd, Hero Honda Motorcycles India Ltd, Dongfeng Honda Automobile Company in China and Honda Atlas Cars Pakistan.

[edit] Company history


Honda head office in Aoyama, Tokyo

Honda head office in Aoyama, Tokyo

Company founder Soichiro Honda, after working at Art Shokai, developed his own design for piston rings in 1938. He attempted to sell them to Toyota and after two years of work he won a contract with them.[3] He constructed a new facility to supply Toyota, but soon after, during World War II, the Honda piston manufacturing facilities were almost completely destroyed.

Soichiro Honda created a new company with what he had left. The Japanese market was crippled by World War II; his country was starved of money and fuel, but was still in need of basic transportation. Honda, utilizing his manufacturing facilities, attached an engine to a bicycle which created a cheap and efficient method of transport. He gave his company the name Honda Giken Kōgyō Kabushiki Kaisha which translates to Honda Techno-research Industrial Company Ltd. Despite its grandiose name, the first facility bearing that name was a simple wooden shack where Mr. Honda and his associates would fit the engines to bicycles. The official Japanese name for Honda Motor Company Ltd. remains the same in honor of Soichiro Honda's efforts. On 24 September 1948 the Honda Motor Co. was officially founded in Japan.

Honda began to produce a range of scooters and motorcycles and Soichiro Honda quickly recovered from the losses incurred during the war. Honda's first motorcycle to be put on sale was the 1947 A-Type (one year before the company was officially founded). However, Honda's first full-fledged motorcycle on the market was the 1949 Dream D-Type. It was equipped with a 98cc engine producing around 3 horsepower (2.2 kW). This was followed by other highly popular scooters throughout the 1950s.

In 1958, the American Honda Company was founded and one year later, Honda introduced its first model in the United States, the 1959 Honda C100 Super Cub. The Honda Cub holds the title of being the best-selling vehicle in history, with around 50 million units sold around the world.[4]

Honda began developing prototypes for road cars in the early 1960s, mostly intended for the Japanese market. The first production vehicle by Honda was the 1963 T360, a tiny pickup truck featuring 4 different body styles (including a traditional truck bed and a panel van) and a 360-cc, 30 hp (22 kW) engine. This was followed two months later by Honda's first production automobile, the S500. The S500 was a 2 door roadster featuring a 492 cc engine capable of 44 hp (33 kW) with a high 9,500 RPM redline. It was fitted to a 4-speed transmission with the rear wheels being chain driven. Mr. Honda took his extensive knowledge of motorcycles and applied it to making his car, of which the chain drive and high redline are evidence.

At the time, nearly all of the Japanese automakers were associated with the former zaibatsu, or keiretsu — Japanese business conglomerates. These large companies had close ties with the government who urged them to absorb smaller carmakers into large brands that could be marketed internationally. Since the government had extensive control over the industry, it was unheard of for a small, independent company to mass produce vehicles, thus making Honda's success historic in the Japanese economy.

Though participating in international motorsport (see Racing), Honda was having difficulty selling its automobiles in the United States. Built for Japanese buyers, Honda's small cars had failed to gain the interest of American buyers. Honda's first automobile imported to the United States was the N600, sold in Hawaii in 1969. In 1970, the car was imported to California and beyond, but its tiny 600 cc engine and minuscule dimensions made it very unpopular with the American public.

Honda finally established a foothold in the American market in 1972 with the introduction of the Civic — larger than their previous models, but still small compared to the typical American car—just as the 1973 energy crisis was impacting worldwide economies. New emissions laws in the US requiring American car makers to add expensive smog pumps and catalytic converters to engines increased car prices. However, Honda introduced an innovative variation on the stratified charge engine, the CVCC (Compound Vortex-Controlled Combustion) in the 1975 Civic, this allowed the Civic to meet emission standards without a smog pump or a catalytic converter. Due to its more complete combustion it also obtained the lowest fuel consumption rating of any vehicle available on the American market for four years during its production.[5] American companies were slow to begin producing small, fuel efficient cars, which gave the Honda Civic a chance to sell well, as well as prove Honda's reputation for reliability and further expand its customer loyalty.

In 1976, the new, larger-than-the-Civic Accord was immediately popular because of its value, economy, and fun-to-drive nature. The Accord has since consistently been one of the best selling cars in the United States, and evolved into a large mid-size for the North American market with V6 and coupe versions.

Honda began building motorcycles in Marysville, Ohio in 1979 and then in 1982, Honda was the third foreign auto manufacturer, after Volkswagen and Rolls-Royce to build car plants in the US. The first car made in the US was the Accord. They now have five plants located in Ohio: two in Marysville (the Marysville Auto Plant and the Marysville Motorcycle Plant), one in East Liberty, Ohio, a Honda Transmission plant in Russells Point, Ohio and an engine plant in Anna, Ohio. They also have plants in Lincoln, Alabama (Honda Manufacturing of Alabama) and Timmonsville, South Carolina and have recently (2006) opened a new plant in Tallapoosa, Georgia. Honda also has an extensive aftermarket parts operation located in Marysville, Ohio, and a research and development facility in Raymond, Ohio. Honda's North American and U.S. headquarters are located in Torrance, California. Honda's Canadian and many US-market Civics have been manufactured in their plant in Alliston, Ontario since 1986. On 27 June, 2006, Honda announced that another vehicle assembly facility will be opening in North America, this time in Greensburg, Indiana. Its completion is expected in 2008.

Honda was the first Japanese automaker to introduce a separate luxury line of vehicles. Created in 1986 and known as Acura, the line is made up of modified versions of Honda vehicles usually with more power and sportiness than their Honda counterparts. The very first model was the Acura Legend, with a 2.5 liter engine producing 151 horsepower (113 kW). European luxury-car manufacturers initially scoffed at the thought of a luxury company from Japan, with criticism coming mostly from Mercedes-Benz.

1987 was an important year for new safety and technology at Honda. The 1987 Honda Prelude was the first passenger vehicle in the world equipped with four-wheel steering (4WS) technology. This also marked the year for the first Japanese car equipped with an SRS airbag, the Honda (Acura) Legend.

In 1989 Honda launched their VTEC variable valve timing system in its production car engines, which gave improved efficiency and performance across a broader range of engine speeds. One of the first of its kind in passenger vehicles. It operates on the premise of using different camshaft profiles (including duration, engaging a third rocker arm) depending on a number of sensors: throttle position, water/oil temperature, RPM. Low-load driving would result in VTEC not being engaged, the camshaft using an efficient-for-low-speed profile. When all sensors permit, the ECU engages the third lobe is engaged, using a different rocker arm, effectively changing the camshaft profile for an efficient-for-high-rpm profile.

In 1999 Honda began selling the Insight. Power is derived from a combination of a 1.0L 3-cylinder gasoline engine, and a large NiMH battery pack providing power-assist during acceleration. This computer-controlled combination provided acceptable performance with exceptionally low fuel consumption and emissions. Honda's hybrid power train is now an available option for the Civic and Accord.

For the 2007 model year, Honda plans to improve the safety of its vehicles by providing front-seat mounted side airbags, side-curtain airbags, and anti-lock brakes as standard equipment in all automobiles available in North America (except the Insight and S2000, which will not have side-curtain airbags). By 2008, Honda plans to have standard traction with vehicle stability control with rollover sensors in all light trucks, which include the CR-V, Odyssey, Pilot, and Acura MDX. Honda also plans to make its vehicles safer for pedestrians, with more safely-designed hoods, hinges, frame constructs, and breakaway wiper pivots.

In 2007, Honda stated it is going to launch low-priced hybrids and advanced diesel technology in the near future, they were also voted the number one car manufacturer in the world for the third period.

In February 2008, Honda announced that it would cease production of motorcycles in the United States in spring 2009.[6]

[edit] Leadership

[edit] Racing history

[edit] Motorcycle

Honda Racing Corporation (HRC) was formed in 1982. The company combines participation in motorcycle races throughout the world with the development of high potential racing machines. Its racing activities are an important source for the creation of leading edge technologies used in the development of Honda motorcycles. HRC also contributes to the advancement of motorcycle sports through a range of activities that include sales of production racing motorcycles, support for satellite teams, and rider education programs.

Soichiro Honda, being a race driver himself, could not stay out of international motorsport. In 1959, Honda entered five motorcycles into the Isle of Man TT race, at that time the most prestigious motorcycle race in the world. While always having powerful engines, it took until 1961 for Honda to tune their chassis well enough to allow Mike Hailwood to claim their first Grand Prix victories in the 125 and 250 cc classes. Hailwood would later pick up their first senior TT wins in 1966 and 1967. Honda's race bikes were known for their "sleek & stylish design" and exotic engine configurations, such as the 5-cylinder, 22,000 rpm, 125 cc bike and their 6-cylinder 250 cc and 380 cc bikes.

1979 saw Honda return to Grand Prix motorcycle racing with their exotic, monocoque-framed, four-stroke NR500. The NR500 featured elongated cylinders each with 8 valves and with connecting rods in pairs, in an attempt to comply with the FIM rules which limited engines to four cylinders. Honda engineered the elongated cylinders in an effort to provide the valve area of an 8-cylinder engine, hoping their four-stroke bike would be able to compete against the now dominant two-stroke racers. Unfortunately, it seemed Honda tried to accomplish too much at one time and the experiment failed. For the 1982 season, Honda debuted their first two stroke race bike, the NS500 and in 1983, Honda won their first 500 cc Grand Prix World Championship with Freddie Spencer. Since then, Honda has become a dominant marque in motorcycle Grand Prix.

In motocross, Honda has claimed 24 motocross world championships.

[edit] Automobile

See also: Honda F1
Honda re-entered Formula One in 2006 after buying the British American Racing team.

Honda re-entered Formula One in 2006 after buying the British American Racing team.

Honda entered Formula One as a constructor for the first time in the 1964 season at the German Grand Prix with Ronnie Bucknum at the wheel. 1965 saw the addition of Richie Ginther to the team, who scored Honda's first point at the Belgian Grand Prix, and Honda's first win at the Mexican Grand Prix. 1967 saw their next win at the Italian Grand Prix with John Surtees as their driver. In 1968, Jo Schlesser was killed in a Honda RA302 at the French Grand Prix. This racing tragedy, coupled with their commercial difficulties selling automobiles in the United States, prompted Honda to withdraw from all international motorsport that year.

After a learning year in 1965, Honda-powered Brabhams dominated the 1966 French Formula Two championship in the hands of Jack Brabham and Denny Hulme. As there was no European Championship that season, this was the top F2 championship that year. In the early 1980s Honda returned to F2, supplying engines to Ron Tauranac's Ralt team. Tauranac had designed the Brabham cars for their earlier involvement. They were again extremely successful. In a related exercise, John Judd's Engine Developments company produced a turbo "Brabham-Honda" engine for use in IndyCar racing. It won only one race, in 1988 for Bobby Rahal at Pocono.

Honda returned to Formula One in 1983, initially with another Formula Two partner, the Spirit team, before switching abruptly to Williams in 1984. In the late 1980s and early 1990s, Honda powered cars won six consecutive Formula One Constructors Championships. WilliamsF1 won the crown in 1986 and 1987. Honda switched allegiance again in 1988. New partners Team McLaren won the title in 1988, 1989, 1990 and 1991. Honda withdrew from Formula One at the end of 1992, although the related Mugen-Honda company maintained a presence up to the end of 1999, winning four races with Ligier and Jordan Grand Prix.

Honda debuted in the CART IndyCar World Series as a works supplier in 1994. The engines were far from competitive at first, but after development, the company powered six consecutive drivers championships. In 2003, Honda transferred its effort to the rival IRL IndyCar Series. In 2004, Honda-powered cars overwhelmingly dominated the IndyCar Series, winning 14 of 16 IndyCar races, including the Indianapolis 500, and claimed the IndyCar Series Manufacturers' Championship, Drivers' Championship and Rookie of the Year titles. In 2006, Honda became the sole engine supplier for the IndyCar Series, including the Indianapolis 500. In the 2006 Indianapolis 500, for the first time in Indianapolis 500 history, the race was run without a single engine problem.[7]

During 1998, Honda considered returning to Formula One with their own team. The project was aborted after the death of its technical director, Harvey Postlethwaite. Honda instead came back as an official engine supplier to British American Racing (BAR) and Jordan Grand Prix. Honda bought a stake in the BAR team in 2004 before buying the team outright at the end of 2005, becoming a constructor for the first time since the 1960s. Honda won the 2006 Hungarian Grand Prix with driver Jenson Button.

[edit] Downhill mountain biking

See also: Honda RN-01 G-cross

Honda has also built a Downhill racing bike, known as the Honda RN-01. Honda have taken on several people to pilot the bike, among them is Greg Minnaar. The team is known as Team G Cross Honda. The key feature of this bike is the gearbox, which replaces the standard Derailleur found on most bikes.

[edit] Strategy and public image

During the 1960s, when it was a small manufacturer, Honda broke out of the Japanese motorcycle market and began exporting to the US. Taking Honda’s story as an archetype of the smaller manufacturer entering a new market already occupied by highly dominant competitors, the story of their market entry, and their subsequent huge success in the US and around the world, has been the subject of some academic controversy. Competing explanations have been advanced to explain Honda’s strategy and the reasons for their success.

The first of these explanations was put forward when, in 1975, Boston Consulting Group (BCG) was commissioned by the UK government to write a report explaining why and how the British motorcycle industry had been out-competed by its Japanese competitors. The report concluded that the Japanese firms, including Honda, had sought a very high scale of production (they had made a large number of motorbikes) in order to benefit from economies of scale and learning curve effects. It blamed the decline of the British motorcycle industry on the failure of British managers to invest enough in their businesses to profit from economies of scale and scope.

The second story is told in 1984 by Richard Pascale, who had interviewed the Honda executives responsible for the firm’s entry into the US market. As opposed to the tightly focused strategy of low cost and high scale that BCG accredited to Honda, Pascale found that their entry into the US market was a story of “miscalculation, serendipity, and organizational learning” – in other words, Honda’s success was due to the adaptability (and hard work) of its staff, rather than any long term strategy. For example, Honda’s initial plan on entering the US was to compete in large motorcycles, around 300 cc. It was only when the team found that the scooters they were using to get themselves around their US base of San Francisco attracted positive interest from consumers that they came up with the idea of selling the Supercub.

The most recent school of thought on Honda’s strategy was put forward by Gary Hamel and C. K. Prahalad in 1989. Creating the concept of core competencies with Honda as an example, they argued that Honda’s success was due to its focus on leadership in the technology of internal combustion engines. For example, the high power-to-weight ratio engines Honda produced for its racing bikes provided technology and expertise which was transferable into mopeds.

Honda's entry into the US motorcycle market during the 1960s is used as a case study for teaching introductory strategy at business schools worldwide.

Its first entrance into the pickup segment, the lightduty Ridgeline, won Truck of the Year from Motor Trend magazine in 2006 (also in 2006, the redesigned Civic won Car of the Year from the magazine, giving Honda a rare double win of Motor Trend honors).

[edit] Initiatives

Although a relatively small manufacturer compared to the other Japanese automakers, Honda is the largest engine maker in the world. Honda has a number of firsts in many categories, including the first engine to meet the 1970 US Clean Air Act (1975 CVCC), the first luxury Japanese car (1987 Legend) and motorcycle (2006 Gold Wing bikes) equipped with an airbag, as well as the first mid-size pickup truck with independent rear suspension (2006 Ridgeline).

The 2006 Ridgeline was a reintroduction of the concept of a Uni-Body truck. Earlier examples of this concept are the Subaru Brat, Volkswagen Rabbit pick-up, and Dodge Rampage/Plymouth Scamp.

Honda has also pioneered new technology in its HA-420 HondaJet that allows new levels of reduced drag, increased aerodynamics and fuel efficiency thus reducing operating costs.

Honda's robot ASIMO (see below) as an R&D project brings together expertise to create a robot that walks, dances and navigates steps.

[edit] Marketing

Honda's official slogan is "The Power of Dreams", however it has never used this to sell their products. It was Mr. Honda's belief that well built products will sell themselves. Many of Honda's most remarkable advertising campaigns have been released for the UK market, and have not been broadcast in North America except on the internet.

In 2003, Honda released its Cog advertisement in the UK and on the Internet. To make the ad, the engineers at Honda constructed a Rube Goldberg Machine made entirely out of car parts from the Honda Accord. To the despair of the engineers at Honda, all the parts were taken from two of only six hand assembled pre-production models of the Accord. The ad depicted a single cog which sets off a chain of events that ends with the Honda Accord moving and Garrison Keillor speaking the tagline, "Isn't it nice when things just... work?" It took 606 takes to get it perfect.[8]

In 2004, they produced the Hate Something advert, which is still shown on British television now, usually immediately followed by a shortened version of the 2005/2006 Impossible Dream advert.

In 2006, Honda released its Choir advertisement, for the UK and the internet. This featured a 60-person choir who sang the car noises as film of the Honda Civic are shown.

In December 2005, Honda released The Impossible Dream a two-minute panoramic advertisement filmed in New Zealand, Japan and Argentina which illustrates the founder's dream to build performance vehicles. While singing The Impossible Dream (The Quest), a man reaches for his racing helmet, leaves his trailer on a minibike, then rides a succession of vintage Honda vehicles; a motorcycle, then a car, then a powerboat, then goes over a waterfall only to reappear piloting a hot air balloon, with Garrison Keillor saying "I couldn't have put it better myself" as the song ends. The song is from the 1960s musical "Man Of La Mancha", sung by Andy Williams.

In Australia, Honda advertised heavily during most motor racing telecasts, and were the official sponsor of the 2006 FIA Formula 1 telecast on broadcaster channel "Ten". In fact, they were the only manufacturer involved in the 2006 Indy Racing League season. In a series of adverts promoting the history of Honda's racing heritage, Honda claimed they "built" cars that won 72 Formula 1 Grand Prix. Detractors scoffed and called it "false advertising", saying that nearly all those victories were claimed by Honda powered (engined) machines, with the cars themselves designed and built by Lotus F1, Williams F1 and McLaren F1 teams respectively. However, former and current staff of the McLaren F1 team have repeatedly proclaimed that Honda contributed more than just engines and provided various chassis, tooling and aerodynamic parts as well as funding. Ayrton Senna, arguably the greatest F1 driver of all time, repeatedly stated that Honda probably played the most significant role in his three world championships. He had immense respect for founder, Soichiro Honda and had a good relationship with Nobuhiko Kawamoto, the chairman of Honda at that time. Senna once called Honda "the greatest company in the world".

For the last several years, during model close-out sales for the current year before the start of the new model year, Honda's advertising has featured an animated character known simply as Mr. Opportunity, voiced by Rob Paulsen. The casual looking man talks about various deals offered by Honda and ends with the phrase "I'm Mr. Opportunity, and I'm knockin'", followed by him then him "knocking" on the television screen or "thumping" the speaker at the end of radio ads. Also, commercials for Honda's international hatchback, the Jazz, are parodies of well-known pop culture images such as Tetris and Thomas The Tank Engine.

As part of their marketing campaign, Honda is an official partner and sponsor of Major League Soccer.

In late 2006 Honda released an ad with ASIMO exploring a museum, looking at the e

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鋼を標準状態、つまり、ノーマルな状態にする処理です。前加工の影響を除き、結晶粒を微細にし機械的性質の改善を目的としています。処理方法は、

①A又はAcm変態点以上+50℃に加熱し、完全にオーステナイト化させます。

②冷却は空中放冷です。

(1)普通焼ならし

所 定の温度から常温まで、大気中で放冷する操作を普通焼ならしと云います。冷却は大気放冷で十分であるが、大気の状態、気温、風向き、部品の大きさなどに よって、所定の硬さが得られない場合があります。特にNiを含んだ構造用合金鋼は自硬性が強いため、軟化しないことがあります。このような場合には、焼戻 しによって目的とする硬さにしなければなりません。この操作をノル・テンと云います。

(2)等温焼ならし

S曲線の鼻の温度に相当する等温炉に挿入し、

等温変態が終了した後取り出して空冷を行い

ます。鼻までの冷却時間は速い方が良く、熱

風冷却が用いられます。この処理は鋼の被切

削性を向上させるのに有効です。別名をサイ

クル・アニリーングとも呼んでいます。

歡迎來到Bewise Inc.的世界,首先恭喜您來到這接受新的資訊讓產業更有競爭力,我們是提供專業刀具製造商,應對客戶高品質的刀具需求,我們可以協助客戶滿足您對產業的不同要求,我們有能力達到非常卓越的客戶需求品質,這是現有相關技術無法比擬的,我們成功的滿足了各行各業的要求,包括:精密HSS DIN切削刀具協助客戶設計刀具流程DIN or JIS 鎢鋼切削刀具設計NAS986 NAS965 NAS897 NAS937orNAS907 航太切削刀具,NAS航太刀具設計超高硬度的切削刀具BW捨棄式鑽石V卡刀BW捨棄式金屬圓鋸片木工捨棄式金屬圓鋸片PCD木工圓鋸片醫療配件刀具設計汽車業刀具設計電子產業鑽石刀具全鎢鋼V卡刀-電路版專用全鎢鋼鋸片焊刃式側銑刀焊刃式千鳥側銑刀焊刃式T型銑刀焊刃式千鳥T型銑刀焊刃式螺旋機械鉸刀全鎢鋼斜邊刀電路版專用鎢鋼焊刃式高速鉸刀超微粒鎢鋼機械鉸刀超微粒鎢鋼定點鑽焊刃式帶柄角度銑刀焊刃式螺旋立銑刀焊刃式帶柄倒角銑刀焊刃式角度銑刀焊刃式筒型平面銑刀木工產業鑽石刀具等等。我們的產品涵蓋了從民生刀具到工業級的刀具設計;從微細刀具到大型刀具;從小型生產到大型量產;全自動整合;我們的技術可提供您連續生產的效能,我們整體的服務及卓越的技術,恭迎您親自體驗!!

BW Bewise Inc. Willy Chen willy@tool-tool.com bw@tool-tool.com www.tool-tool.com skype:willy_chen_bw mobile:0937-618-190 Head &Administration Office No.13,Shiang Shang 2nd St., West Chiu Taichung,Taiwan 40356 http://www.tool-tool..com / FAX:+886 4 2471 4839 N.Branch 5F,No.460,Fu Shin North Rd.,Taipei,Taiwan S.Branch No.24,Sec.1,Chia Pu East Rd.,Taipao City,Chiayi Hsien,Taiwan

Welcome to BW tool world! We are an experienced tool maker specialized in cutting tools. We focus on what you need and endeavor to research the best cutter to satisfy users demand. Our customers involve wide range of industries, like mold & die, aerospace, electronic, machinery, etc. We are professional expert in cutting field. We would like to solve every problem from you. Please feel free to contact us, its our pleasure to serve for you. BW product including: cutting toolaerospace tool .HSS DIN Cutting toolCarbide end millsCarbide cutting toolNAS Cutting toolNAS986 NAS965 NAS897 NAS937orNAS907 Cutting Tools,Carbide end milldisc milling cutter,Aerospace cutting toolhss drillФрезерыCarbide drillHigh speed steelMilling cutterCVDD(Chemical Vapor Deposition Diamond )’PCBN (Polycrystalline Cubic Boron Nitride) Core drillTapered end millsCVD Diamond Tools Inserts’PCD Edge-Beveling Cutter(Golden FingerEdge modifying knifeSolid carbide saw blade-V typeV-type locking-special use for PC boardMetal Slitting SawaCarbide Side milling CuttersCarbide Side Milling Cutters With Staggered TeethCarbide T-Slot Milling CuttersCarbide T-Slot Milling Cutters With Staggered TeethCarbide Machine ReamersHigh speed reamer-standard typeHigh speed reamer-long type’’PCD V-CutterPCD Wood toolsPCD Cutting toolsPCD Circular Saw BladePVDD End Millsdiamond tool V-type locking-special use for PC board Single Crystal Diamond Metric end millsMiniature end millsСпециальные режущие инструменты Пустотелое сверло Pilot reamerFraisesFresas con mango PCD (Polycrystalline diamond) ‘FreseElectronics cutterStep drillMetal cutting sawDouble margin drillGun barrelAngle milling cutterCarbide burrsCarbide tipped cutterChamfering toolIC card engraving cutterSide cutterNAS toolDIN or JIS toolSpecial toolMetal slitting sawsShell end millsSide and face milling cuttersSide chip clearance sawsLong end millsStub roughing end millsDovetail milling cuttersCarbide slot drillsCarbide torus cuttersAngel carbide end millsCarbide torus cuttersCarbide ball-nosed slot drillsMould cutterTool manufacturer.

Bewise Inc. www.tool-tool.com

ようこそBewise Inc.の世界へお越し下さいませ、先ず御目出度たいのは新たな

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弊社は各領域に供給できる内容は:

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こ の処理は鋼を硬く、強くするために行う熱処理です。硬く焼き を入れるにはオーステナイト化温度から急冷を行うことが必要です。急冷をクエンチング、硬くすることをハードニングと云いますが、急冷が必ずしも焼入れで はありません。急冷しても硬くならない時は水靱処理(SC、MnH材)とか固溶化熱処理(SUS304材)とか呼んでいます。したがって、焼入れの場合は クエンチング・ハードニングと呼ぶのが正解でしょう。なお、焼入れのルールは、

①A又はA3-1変態点以上+50℃に加熱し、十分にオーステナイト化させます。

② 臨界区域を急冷し、危険区域は徐冷します。オーステナイト化温度は、焼入れルールの内で最も大切なのは急冷方法です。臨界区域のみを急冷し、危険区域は徐 冷する。そのためには、種々知恵を出さなければなりません。臨界区域を速く冷やすには水や油を使いますが、水は危険区域までも速く冷やし、焼割れや変形が 生じやすくなります。油では火災などの危険性もあります。そこで最近ではポリマー焼入冷却剤が活用されていますが、オールマイティではありません。焼入冷 却のコツとして、割れず、硬く焼入れるには〔速く、ゆっくり〕冷やすことです。どうしたら良いでしょう。ここが熱処理屋のノウハウなのです。

(1)引上げ焼入れ

速 く、ゆっくり冷却を行う方法は、引上げ焼入れです。時間焼入れとも云っていますが、これはオーステナイト化温度から焼入液の中に投入後、ある時間経過した ところで引上げてゆっくり冷やす方法です。焼入液の中に漬けておく時間は、液の種類と処理品の大きさによって違いますが、大体の目安は、

     水焼入れ:品物の直径3mmにつき1秒間水浸漬

油焼入れ:品物の直径3mmにつき3秒間油浸漬

(板厚の場合は浸漬時間は50%増)

です。浸漬後は引上げて空冷で良いのですが、水の場合は空冷よりも油冷が効果的です。

(2)マルテンパー

この方法は〔割れず、硬く、曲がらず〕焼きを入れるのに、最も適した処理方法の1つです。油又は塩浴をMs点の温度付近に保ち、この熱浴に焼入れし、表面と内部が同じ温度になった頃見計らって引上げます。

(3)オーステンパー

マ ルテンパーよりもさらに高い温度(300~500℃)の熱浴を用い、この中に焼入れを行い変態が完了したら引上げて空冷を行います。この処理はS曲線を上 手に使うことと、部品を変態終了まで保持しなければならないため、あまり大物は処理できません。得られる組織をベイナイトと云い、焼戻し無しでも相当硬 く、また、じん性があります。S曲線の鼻直下のオーステンパーで得られる組織を上部ベイナイト、Ms点に近いところでベイナイト変態を起こさせた組織を下 部ベイナイトと呼び、硬さは処理温度が低い方が大きな値を示します。

焼入れの注意事項

(1)焼入冷却液

焼 入冷却液の種類と性能には、水、油、熱浴種々ありますが、水は冷たく人肌以下に、油は熱く80℃程度が常識です。水が人肌以上になると冷却速度が小さくな り硬くなりません。また、油は温度が低いと粘性が高くなり、冷却速度が遅くなります。油の場合はホットクエンチと云って、120~150℃程度に温度を上 げて用いていることもあります。これは焼入ひずみが少なくなるので、精密部品の焼入れなどに利用されています。焼入冷却液の冷却能力は、撹拌の程度によっ ても異なります。均一に急速冷却するためには、工夫をし十分に撹拌する必要があります。まず、真っ赤に加熱された鋼を冷却剤中へ投入します。鋼に触れた液 体の表面は、沸点まで温度が上昇しますが、この一瞬の間鋼の表面は熱を奪われますから、温度がわずか下がります。続いて鋼の表面は薄い蒸気膜で全面が覆わ れます。この蒸気膜は断熱の働きをするため、冷却は緩やかとなります。この段階を蒸気膜段階と云います。さらに鋼に触れている部分は、猛烈に沸騰を始め蒸 気の泡が出ます。この蒸気が鋼から離れるとき熱を奪い冷えてくるのです。この段階を沸騰段階と呼んでいます。また、冷え始める時の温度を特性温度と云って います。この段階は非常に重要で、焼きが入るか否か、つまり前述した臨界区域に相当するところです。なぜ均一に十分撹拌しなければならないか、理解をして 頂けたと思います。さらに鋼の温度が下がり、約400℃位になると沸騰もおさまり、対流をし始め冷却が緩やかになります。この段階を対流段階と云います。 この後の冷却でマルテンサイト変態が開始するのです。この段階が速いと焼割れや焼ひずみが生じやすくなります。また、同じ液でも部品の形状や大きさによっ て、冷え方が異なります。焼入れに当たっては、この冷え方を十分に頭に入れて、各部が一様に冷えるよう考えましょう。

(2)焼入硬さ

焼入れを行うと硬くなります。工具鋼材の場合はW、Cr、Vなどの合金元素によって変わりますが、構造用鋼の場合は、含まれているC%の量のみによって変化し、合金元素には影響されません。つまり、構造用鋼の場合は、

最高焼入硬さ(HRC)=30+0.5C%(フル・マルテン)

最低焼入硬さ(HRC)=20+0.5C%(ハーフ・マルテン)

例えばS45Cの場合には、

最高焼入硬さ(HRC)=30+0.5×45=53

最低焼入硬さ(HRC)=20+0.5×45=43

になります。この関係式はSCM435などの場合においても同じです。

(3)焼入深さ

焼 きがどの程度の深さまで入ったかは、含まれている化学成分によって大きく影響されます。この焼入深さを左右する性質を焼入性と云います。焼入性に最も影響 を及ぼすのがC%です。次はB、Mn、Mo、Crに順で影響をしますが、SiやNiはそれほど影響をしません。また、焼入性にはオーステナイト化温度にお ける結晶粒度の大きさも影響します。結晶粒が粗いほど焼入性が大きく、深く硬化します。一般的に焼入性が大きい鋼(特殊鋼)は油焼きで十分硬くなります が、小さい鋼(炭素鋼)は水焼入れでなければ硬くなりません。

④ 質量効果:同じ成分の鋼でも太さや厚みが異なると、硬さが入り難くなります。つまり、硬さと深さは鋼材の質量によって変化するのです。これを焼入れの質量 効果と呼んでいます。質量効果が大きいと云うことは、鋼材の大きさによって硬化の差が大きいことを意味し、大物になるほど焼きが入りにくと云うことになり ます。また、逆に質量効果が小さいと云うことは、質量による影響が小さく、大物まで良く焼きが入ると云うことになります。一般的に炭素鋼は質量効果が大き く、特殊鋼は小さいと云えましょう。

歡迎來到Bewise Inc.的世界,首先恭喜您來到這接受新的資訊讓產業更有競爭力,我們是提供專業刀具製造商,應對客戶高品質的刀具需求,我們可以協助客戶滿足您對產業的不同要求,我們有能力達到非常卓越的客戶需求品質,這是現有相關技術無法比擬的,我們成功的滿足了各行各業的要求,包括:精密HSS DIN切削刀具協助客戶設計刀具流程DIN or JIS 鎢鋼切削刀具設計NAS986 NAS965 NAS897 NAS937orNAS907 航太切削刀具,NAS航太刀具設計超高硬度的切削刀具BW捨棄式鑽石V卡刀BW捨棄式金屬圓鋸片木工捨棄式金屬圓鋸片PCD木工圓鋸片醫療配件刀具設計汽車業刀具設計電子產業鑽石刀具全鎢鋼V卡刀-電路版專用全鎢鋼鋸片焊刃式側銑刀焊刃式千鳥側銑刀焊刃式T型銑刀焊刃式千鳥T型銑刀焊刃式螺旋機械鉸刀全鎢鋼斜邊刀電路版專用鎢鋼焊刃式高速鉸刀超微粒鎢鋼機械鉸刀超微粒鎢鋼定點鑽焊刃式帶柄角度銑刀焊刃式螺旋立銑刀焊刃式帶柄倒角銑刀焊刃式角度銑刀焊刃式筒型平面銑刀木工產業鑽石刀具等等。我們的產品涵蓋了從民生刀具到工業級的刀具設計;從微細刀具到大型刀具;從小型生產到大型量產;全自動整合;我們的技術可提供您連續生產的效能,我們整體的服務及卓越的技術,恭迎您親自體驗!!

BW Bewise Inc. Willy Chen willy@tool-tool.com bw@tool-tool.com www.tool-tool.com skype:willy_chen_bw mobile:0937-618-190 Head &Administration Office No.13,Shiang Shang 2nd St., West Chiu Taichung,Taiwan 40356 http://www.tool-tool..com / FAX:+886 4 2471 4839 N.Branch 5F,No.460,Fu Shin North Rd.,Taipei,Taiwan S.Branch No.24,Sec.1,Chia Pu East Rd.,Taipao City,Chiayi Hsien,Taiwan

Welcome to BW tool world! We are an experienced tool maker specialized in cutting tools. We focus on what you need and endeavor to research the best cutter to satisfy users demand. Our customers involve wide range of industries, like mold & die, aerospace, electronic, machinery, etc. We are professional expert in cutting field. We would like to solve every problem from you. Please feel free to contact us, its our pleasure to serve for you. BW product including: cutting toolaerospace tool .HSS DIN Cutting toolCarbide end millsCarbide cutting toolNAS Cutting toolNAS986 NAS965 NAS897 NAS937orNAS907 Cutting Tools,Carbide end milldisc milling cutter,Aerospace cutting toolhss drillФрезерыCarbide drillHigh speed steelMilling cutterCVDD(Chemical Vapor Deposition Diamond )’PCBN (Polycrystalline Cubic Boron Nitride) Core drillTapered end millsCVD Diamond Tools Inserts’PCD Edge-Beveling Cutter(Golden FingerEdge modifying knifeSolid carbide saw blade-V typeV-type locking-special use for PC boardMetal Slitting SawaCarbide Side milling CuttersCarbide Side Milling Cutters With Staggered TeethCarbide T-Slot Milling CuttersCarbide T-Slot Milling Cutters With Staggered TeethCarbide Machine ReamersHigh speed reamer-standard typeHigh speed reamer-long type’’PCD V-CutterPCD Wood toolsPCD Cutting toolsPCD Circular Saw BladePVDD End Millsdiamond tool V-type locking-special use for PC board Single Crystal Diamond Metric end millsMiniature end millsСпециальные режущие инструменты Пустотелое сверло Pilot reamerFraisesFresas con mango PCD (Polycrystalline diamond) ‘FreseElectronics cutterStep drillMetal cutting sawDouble margin drillGun barrelAngle milling cutterCarbide burrsCarbide tipped cutterChamfering toolIC card engraving cutterSide cutterNAS toolDIN or JIS toolSpecial toolMetal slitting sawsShell end millsSide and face milling cuttersSide chip clearance sawsLong end millsStub roughing end millsDovetail milling cuttersCarbide slot drillsCarbide torus cuttersAngel carbide end millsCarbide torus cuttersCarbide ball-nosed slot drillsMould cutterTool manufacturer.

Bewise Inc. www.tool-tool.com

ようこそBewise Inc.

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焼 戻しとは焼入れ又は焼ならしを行った鋼について、硬さを減少させ粘さを増加させる目的で行う熱処理です。一般的に焼戻温度は粘さを目的とする構造用鋼など の場合は、400℃以上の温度で、また、硬さを必要とする場合には200℃前後の温度です。高温の場合を高温焼戻し又は調質、低温の場合は低温焼戻しと呼 んでいます。なお、焼ならしの後に行う場合はノル・テンと云っています。いずれの場合も、

①A変態点以下の温度で加熱します。

②SKD、SKH材を除き、高温焼戻しの場合は急冷、低温焼戻しは空冷です。

焼 戻しは原則として、焼入れ直後に行います。焼入れ後長時間放置しておくと、置割れが発生する場合があるからです。焼戻保持時間は1時間程度を標準にしてい ますが、長時間1回行うことよりも、短時間で2~3回繰返し行う方が効果的です。また、焼戻し温度においては、ぜい性を起こす温度があるから、注意をする 必要があります。

    低温焼戻ぜい性=300~400℃

(鋼材特有な性質ですからこの温度では絶対に行ってはいけません)

高温焼戻ぜい性=550~650℃

(空冷を行うと生じます。加熱温度から必ず急冷をしましょう)

(1)低温焼戻し

高 い硬さと耐摩耗性が要求される工具類やゲージ類には、この低温焼戻しが行われなます。焼戻温度は150~200℃であり、保持時間は1時間が原則です。低 温焼戻しによって、硬くてもろい焼入マルテンサイトが、粘い焼戻マルテンサイトに変化します。また、焼入れによるストレスが除去でき、経年変化の防止、研 磨割れの防止、耐摩耗性の向上などに役立ちます。

(2)高温焼戻し

高 温焼戻しは強じん性が要求されるシャフト類、各種の歯車類、また、SKHやSKDなどの工具類に適用されます。強じん性を必要とする場合には、 550~650℃に1時間程度加熱し、高温焼戻ぜい性阻止のため急冷をします。得られる組織は約400℃焼戻しでトルースタイト、約600℃でソルバイト 組織となります。いずれの場合も基本的にはフェライトとセメンタイトの混合相です。また、焼戻硬化用の戻し温度は500~600℃で、冷却は空冷です。こ の処理によって、焼入れによって残っていたオーステナイト(残留オーステナイト)がマルテンサイトに変態します。したがって、急冷では焼割れと同じような 割れを生ずる恐れがあるからです。1回目の焼戻しで残留オーステナイトをマルテン化させ、2回目で本来の意味の焼戻しと云うことになります。つまり、硬化 用では必ず2回以上は行う必要があります。

なお、焼戻温度と長さの関係には、3つの段階が考えられます。

第1段階:80~160℃の範囲で収縮が起こります。これは正方晶のマルテンサイトの分解とFe2.3Cの析出が起こるためです

第2段階:230~280℃の範囲で起こる膨張です。これは残留オーステナイトが下部ベイナイトに分解する過程です。残留オーステナイトが存在しない鋼やサブゼロ処理した鋼には現れません。

第 3段階:300℃位に現れる大きな収縮で、立方晶のフェライトとセメンタイトが出現するため、大きな収縮が起こります。また、一般的に硬さはセメンタイト が析出し、さらに凝集してくると低下する現象を示しますが、高速度鋼や合金鋼のような合金鋼は500~600℃焼戻しにおいて上昇します。このようにある 温度で硬さが上昇する現象を二次硬化現象と云っています。これは残留オーステナイトのマルテン化と複炭化物の析出によるものです。なお、高温焼戻しで硬さ が低下する度合いを、焼戻し軟化抵抗が大きい、小さいと表現をしています。したがって、Ⅳ形の硬さ曲線を示す高合金熱間金型用鋼などは、高温での軟化抵抗 が大きいといえましょう。

サブゼロ(深冷処理)

サブゼロ処理は深冷処理とも呼ばれているもので、0℃以下の温度に冷やす処理です。焼入れした鋼中には多少(10~30%)に関わらず写真8に 示す残留オーステナイトが存在しています。このオーステナイトは置狂いや置割れの原因となるばかりでなく、硬さの低下もきたしています。したがって、0℃ 以下の温度に冷やし、人為的にマルテンサイト化させる必要があります。サブゼロ処理はその1つの方法です。寒剤にはドライアイス、炭酸ガス、液体窒素など があります。ドライアイスとアルコール(メチル、エチルどちらも可)で約-80℃、炭酸ガスで-130℃、液体窒素では-196℃まで冷やすことができま す。-80℃程度までのサブゼロを普通サブゼロ、-130℃以下の温度を超サブゼロと云い、温度が低い方が耐摩耗性向上には効果的です。処理時間はその温 度になってから30分程度で良く、保持後は空冷でも良いが、水中か湯中に投入することがベターな方法です。これをアップ・ヒルクエンチングと云っていま す。処理後は所定の焼戻しが必要です。

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Welcome to BW tool world! We are an experienced tool maker specialized in cutting tools. We focus on what you need and endeavor to research the best cutter to satisfy users demand. Our customers involve wide range of industries, like mold & die, aerospace, electronic, machinery, etc. We are professional expert in cutting field. We would like to solve every problem from you. Please feel free to contact us, its our pleasure to serve for you. BW product including: cutting toolaerospace tool .HSS DIN Cutting toolCarbide end millsCarbide cutting toolNAS Cutting toolNAS986 NAS965 NAS897 NAS937orNAS907 Cutting Tools,Carbide end milldisc milling cutter,Aerospace cutting toolhss drillФрезерыCarbide drillHigh speed steelMilling cutterCVDD(Chemical Vapor Deposition Diamond )’PCBN (Polycrystalline Cubic Boron Nitride) Core drillTapered end millsCVD Diamond Tools Inserts’PCD Edge-Beveling Cutter(Golden FingerEdge modifying knifeSolid carbide saw blade-V typeV-type locking-special use for PC boardMetal Slitting SawaCarbide Side milling CuttersCarbide Side Milling Cutters With Staggered TeethCarbide T-Slot Milling CuttersCarbide T-Slot Milling Cutters With Staggered TeethCarbide Machine ReamersHigh speed reamer-standard typeHigh speed reamer-long type’’PCD V-CutterPCD Wood toolsPCD Cutting toolsPCD Circular Saw BladePVDD End Millsdiamond tool V-type locking-special use for PC board Single Crystal Diamond Metric end millsMiniature end millsСпециальные режущие инструменты Пустотелое сверло Pilot reamerFraisesFresas con mango PCD (Polycrystalline diamond) ‘FreseElectronics cutterStep drillMetal cutting sawDouble margin drillGun barrelAngle milling cutterCarbide burrsCarbide tipped cutterChamfering toolIC card engraving cutterSide cutterNAS toolDIN or JIS toolSpecial toolMetal slitting sawsShell end millsSide and face milling cuttersSide chip clearance sawsLong end millsStub roughing end millsDovetail milling cuttersCarbide slot drillsCarbide torus cuttersAngel carbide end millsCarbide torus cuttersCarbide ball-nosed slot drillsMould cutterTool manufacturer.

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