Bewise Inc. www.tool-tool.com Reference source from the internet.
图示螺纹特形轴,毛坯为φ58mm×100mm棒材,材料为45钢。数控车削前毛坯已粗车端面、钻好中心孔。

  1.根据零件图样要求、毛坯情况,确定工艺方案及加工路线

  1)对细长轴类零件,轴心线为工艺基准,用三爪自定心卡盘夹持φ58mm外圆一头,使工件伸出卡盘175mm,用顶尖顶持另一头,一次装夹完成粗精加工(注:切断时将顶尖退出)。

  2) 工步顺序

  ① 粗车外圆。基本采用阶梯切削路线,粗车φ56mm、SφS50mm、φ36mm、M30mm各外圆段以及锥长为10mm的圆锥段,留1mm的余量。

  ② 自右向左精车各外圆面:螺纹段右倒角→切削螺纹段外圆φ30mm→车锥长10mm的圆锥→车φ36mm圆柱段→车φ56mm圆柱段。

  ③ 车5mm×φ26mm螺纹退刀槽,倒螺纹段左倒角,车锥长10mm的圆锥以及车5mm×φ34mm的槽。

  ④ 车螺纹。

  ⑤ 自右向左粗车R15mm、R25mm、Sφ50mm、R15mm各圆弧面及30°的圆锥面。

  ⑥ 自右向左精车R15mm、R25mm、Sφ50mm、R15mm各圆弧面及30°的圆锥面。

  ⑦ 切断。

  2.选择机床设备

  根据零件图样要求,选用经济型数控车床即可达到要求。故选用CK0630型数控卧式车床。

  3.选择刀具

  根据加工要求,选用三把刀具,T01为粗加工刀,选90°外圆车刀,T03为切槽刀,刀宽为3mm,T05为螺纹刀。

  同时把三把刀在自动换刀刀架上安装好,且都对好刀,把它们的刀偏值输入相应的刀具参数中。

  4.确定切削用量

  切削用量的具体数值应根据该机床性能、相关的手册并结合实际经验确定,详见加工程序。

  5.确定工件坐标系、对刀点和换刀点

  确定以工件左端面与轴心线的交点O为工件原点,建立XOZ工件坐标系。

  采用手动试切对刀方法(操作与上面数控车床的对刀方法相同)把点O作为对刀点。换刀点设置在工件坐标系下X70、Z30处。

螺纹特形轴

  编写程序(该程序用于CK0630车床)

  按该机床规定的指令代码和程序段格式,把加工零件的全部工艺过程编写成程序清单。该工件的加工程序如下:

  N0010 G59 X0 Z195
  N0020 G90
  N0030 G92 X70 Z30
  N0040 M03 S450
  N0050 M06 T01
  N0060 G00 X57 Z1
  N0070 G01 X57 Z-170 F80
  N0080 G00 X58 Z1
  N0090 G00 X51 Z1
  N0100 G01 X51 Z-113 F80
  N0110 G00 X52 Z1
  N0120 G91
  N0130 G81 P3
  N0140 G00 X-5 Z0
  N0150 G01 X0 Z-63 F80
  N0160 G00 X0 Z63
  N0170 G80
  N0180 G81 P2
  N0190 G00 X-3 Z0
  N0200 G01 X0 Z-25 F80
  N0210 G00 X0 Z25
  N0220 G80
  N0230 G90
  N0240 G00 X31 Z-25
  N0250 G01 X37 Z-35 F80
  N0260 G00 X37 Z1
  N0270 G00 X23 Z-72.5
  N0280 G00 X26 Z1
  N0290 G01 X30 Z-2 F60
  N0300 G01 X30 Z-25 F60
  N0310 G01 X36 Z-35 F60
  N0320 G01 X36 Z-63 F60
  N0330 G00 X56 Z-63
  N0340 G01 X56 Z-170 F60
  N0350 G28
  N0360 G29
  N0370 M06 T03
  N0380 M03 S400
  N0390 G00 X31 Z-25
  N0400 G01 X26 Z-25 F40
  N0410 G00 X31 Z-23
  N0420 G01 X26 Z-23 F40
  N0430 G00 X30 Z-21
  N0440 G01 X26 Z-23 F40
  N0450 G00 X36 Z-35
  N0460 G01 X26 Z-25 F40
  N0470 G00 X57 Z-113
  N0480 G01 X34.5 Z-113 F40
  N0490 G00 X57 Z-111
  N0500 G01 X34.5 Z-111 F40
  N0510 G28
  N0520 G29
  N0530 M06 T05
  N0540 G00 X30 Z2
  N0550 G91
  N0560 G33 D30 I27.8 X0.1 P3 Q0
  N0570 G01 X0 Z1.5
  N0580 G33 D30 I27.8 X0.1 P3 Q0
  N0590 G90
  N0600 G00 X38 Z-45
  N0610 G03 X32 Z-54 I60 K-54 F40
  N0620 G02 X42 Z-69 I80 K-54 F40
  N0630 G03 X42 Z-99 I0 K-84 F40
  N0640 G03 X36 Z-108 I64 K-108 F40
  N0650 G00 X48 Z-113
  N0660 G01 X56 Z-135.4 F60
  N0670 G00 X56 Z-113
  N0680 G00 X40 Z-113
  N0690 G01 X56 Z-135.4 F60
  N0700 G00 X50 Z-113
  N0710 G00 X36 Z-113
  N0720 G01 X56 Z-108 F60
  N0730 G00 X36 Z-45
  N0740 G00 X36 Z-45
  N0750 M03 S800
  N0760 G03 X30 Z-54 I60 K-54 F40
  N0770 G03 X40 Z-69 I80 K-54 F40
  N0780 G02 X40 Z-99 I0 K-84 F40
  N0790 G03 X34 Z-108 I64 K-108 F40
  N0800 G01 X34 Z-113 F40
  N0810 G01 X56 Z-135.4 F40
  N0820 G28
  N0830 G29
  N0840 M06 T03
  N0850 M03 S400
  N0860 G00 X57 Z-168
  N0870 G01 X0 Z-168 F40
  N0880 G28
  N0890 G29
  N0900 M05
  N0910 M02



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