???????????????????????????
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)?????????????????