如下圖所示為數(shù)控銑削加工的凸輪零件圖，毛坯已加工，孔和兩端面已加工，材料為20cr。
編程實例零件圖
根據(jù)圖紙要求，工件以孔和一個端面作為定位面，在端面上用螺母和墊圈壓緊。由于孔是設(shè)計和定位基準，應(yīng)將對刀點(起刀點)選在孔中心線上距離工件上表面50mm處，以便于確定刀具與工件的相對位置。
加工工藝路線如下：凸輪輪廓銑削加工(選用立銑刀t01，可以通過改變刀具半徑補償量來進行粗加工和精加工；鉆、擴、鉸孔(中心鉆t02、鉆頭t03、擴孔鉆t04、鉸刀t05)。
工件坐標原點設(shè)置于工件上表面，建立如上圖所示的工件坐標系，起刀點在工件坐標系中的坐標為(0，0，50)。通過計算可以得到各段圓弧連接點在xy平面上坐標：a(-63.8，0)；b(-9.962，-63.017)；c(-5.596，-63.746)；d(63.999，-0.269)；e(63.728，0.03)；f(44.805，19.387)；g(14.786，59.181)；h(-55.618，25.054)；i(-62.897，10.697)。
數(shù)控加工程序如下：
（1）o0017
n0010 g92 x0 y0 z50
n0020 m06 t01
n0030 g90 g00 z10
n0040 x-73.8 y20
n0050 s800 m03
n0060 g43 z-16 h01 m08
n0070 g42 g01 x-63.8 y10 f60 d01
n0080 x-63.8 y0
n0090 g03 x-9.962 y-63.017 r63.8
n0100 g02 x-5.596 y-63.746 r175
n0110 g03 x63.999 y-0.269 r64
n0120 x63.728 y0.03 r0.3
n0130 g02 x44.805 y19.387 r21
n0140 g03 x14.786 y59.181 r46
n0150 x-55.617 y25.054 r61
n0160 g02 x-62.897 y10.697 r175
n0170 g03 x-63.8 y0 r63.8
n0180 g01 x-63.8 y-10
n0190 g01 g40 x-73.8 y-20 m09
（2）n0200 g00 g49 z10 m05
n0210 m06 t02
n0220 g00 x0 y31.5
n0230 s1000 m03
n0240 g43 z4 h02 m08
n0250 g98 g90 g81 z-5 r2 f50
n0260 m98 p0032
n0270 g80 g00 g49 z10 m05 m09
n0280 m06 t03
n0290 g00 x0 y31.5
n0300 s600 m03
n0310 g43 z4 h03 m08
n0320 g99 g81 z-18 r2 f60
n0330 m98 p0033
n0340 g80 g00 g49 z10 m05 m09
n0350 m06 t04
n0360 g00 x0 y31.5
n0370 s500 m03
n0380 g43 z4 h04
n0390 g99 g81 z-18 r2 f40
n0400 m98 p0033
n0410 g80 g00 g49 z10 m05
n0420 m06 t05
n0430 g00 x0 y31.5
n0440 s500 m03
n0450 g43 z4 h04
n0460 g99 g81 z-18 r2 f40
n0470 m98 p0033
n0480 g80 g00 g49 z10 m05
n0490 g00 x0 y0 z50
n0500 m30
（3）o0032；子程序
n0010 g99 g81 z-5 r2 x-31.5 y0 f40
n0020 g81 z-5 r2 x0 y-31.5
n0030 g81 z-5 r2 x31.5 y0
n0040 m99
o0033；
n0010 g99 g81 z-18 r2 x-31.5 y0 f40
n0020 g81 z-18 r2 x0 y-31.5
n0030 g81 z-18 r2 x31.5 y0
n0040 m99