编程题：
数控车床加工如图所示零件，按要求完成零件的加工程序编制。一号刀为外圆车刀，二号刀为切槽刀，三号刀为螺纹刀。（不考虑刀尖圆弧半径补偿）
要求：
1)、毛坯直径82mm
2)、精加工余量0.3mm；
3)、精加工进给率F0.1，粗加工进给率F0.3；
4)、粗加工每次进刀1mm，退刀0.5mm；
5)、切刀槽宽4mm；
6)、未注倒角为2×45°
参考答案：
左端程序;
O0001
G99M03S600;
T0101;
G00X100.Z100.;
X84.Z2.;
G71U1.R0.5;
G71P1Q2U0.3W0.3F0.3;
N1G00X0.;
G01Z0.;
X45.97;
X49.97Z-2.;
Z-30.;
X58.;
G02X68.Z-35.R5.;
G01X74.;
X78.W-2.;
Z-63.;
N2X84.;
G70P1Q2S900F0.1;
G00X100.Z100.;
M05;
M03;
左端程序:
O0002
G99M03S600;
T0101;
G00X100.Z100.;
X84.Z2.;
G71U1.R0.5;
G71P1Q2U0.3W0.3F0.3;
N1G00X0.;
G01Z0.;
X40.85;
X44.85Z-2.;
Z-34.96;
X52.01;
Z-45.;
X74.;
X78.W-2.;
N2X84.;
G70P1Q2S900F0.1;
G00X100.Z100.;
T0202S400;
G00X53.Z-34.96;
G01X42.;
G04X2.;
X53.;
G00X100.Z100.;
T0303;
G00X48.Z2.;
G92X44.2Z-32.F1.5;
X43.6;
X43.1;
X43.05;
G00X100.Z100.;
T0100;
M05;
M03;