???????????????????????????

1. ?????????????

1)??HRA???

2)???????1.6 mm?????Ra?2?m???????????????0.2 mm???????????????15 mm????????15 mm????????????3 mm?????????????????????????0.1/10 mm?

3)??????????0.2 HRA?0.1 HRA?????????????????±0.5 HRA?

4)????????????6?8s???????????????2s???2s??????????????????????????????1.5 mm?

5)?????????3??3????????????????

2. ?????????????

????????????????A???????????????1.6 mm???????????

1)????????1 mm???????2?m?????????????????

2)??????GB/T 4340.2—1999??????????????????d<100?m?±0.2?m?100?m?d<200?m?±0.1?m????294.2N(30 kgf)????????1 mm??????294.2N?????????

3)???????????3d??????????????????2.5d?

3.?????????????????

1)??HRC?HRA?????

2)?????????????1.5 mm?????????????????0.1 mm?

3)????????????????2.0 mm??????????????????1.5 mm?

4)??????40 HRC???????????5???????40 HRC???????????3???

5)?????????????????