3．二维轮廓零件的数控铣削加工及其编程（1）零件图如下图所示，程序原点位于上表面。（2）刀具选择立铣刀答题时请说明刀具直径。（3）安全面高度20mm。（4）仅需写出二维轮廓加工程序。
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换直径18铣刀1号刀，长度补偿
1号刀，左偏刀具补偿切入
fN100X45N110G2X35Y16I00J10N120G1Y20N130G3X25Y30I10J00N140G1X11N150X6Y40N160Y60N170X11Y70N180X25N190G3X35Y80I00J10N200G1Y84N210G2X45Y94I10J00N220G1X79N230G2X94Y79I00J15N240G1Y21N250G2X79Y6I15J00N260G1X595N270G3X54105Y346I00J7N280G40G1X52871Y1286N290G0Z5M05N300Z20N310M06T02N320X77286Y52371M03N330G43H02Z5N340Z254N350G1Z00F250N360G41X7946Y53605H02N370G3X82Y59I446J5395S600N380G1Y615N390Y73N400G3X70Y85I12J00N410G1X54N420G3X42Y73I00J12N430G1Y27N440G3X54Y15I12J00N450G1X70N460G3X82Y27I00J12N470G1Y64N480G3X7946Y69395I7J00N490G40G1X77286Y70629N500G0Z5N510X78557Y47989N520Z5M05N530Z20
R10圆弧R10圆弧
R10圆弧R10圆弧R15圆弧R10圆弧
换直径22铣刀2号刀，长度补偿2号刀，左偏刀具补偿
R12圆弧R12圆弧R12圆弧R12圆弧退刀
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换直径6铣刀
N550G43Z5H03M03S1000
3号刀，长度补偿
N560Z246
N570G1Z5F250
N580G41X79222Y50399H03
3号刀，左偏刀具补偿
N590G3X77203Y5601I6969J662
N600G1X75435Y57778
N610X67657Y65556
N620G3X56343I5657J5657
R8圆弧
N630G1X46444Y55657
N640G3Y44343I5657J5657
R8圆弧
N650G1X56343Y34444
N660G3X67657I5657J5657
R8圆弧
N670G1X83213Y50
N680X73667Y59546
N690G3X68056Y61565I4949J495
N700G40G1X65646Y609
N710G0Z5
N720G00Z20
N730M05
N740X0Y0
N750M30
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