??? ?? Continuous advancement of technology, ?? ???????? ????? ??? ????????? ?????????? ??? ???? ???????? ???????????. ??? ???????????? ????????? ???? ?????????? ????? ???????? ??? ?? ???????????? ?? ?????? ??? ?? ??????? ????? ???? ?? ??????????? ???????? ?? ???? ????? ?????? ?????? ???????? ????? ???????????? ?? ???????precision ??? ?????????? ??????: 1. ?????????? ?????????? ?????????: ???? ?????????? ?? ????????????? ?????????? ?????, ?? ????? ??? ?? ?????? ????? ???????????: ?????????? ??????? ??? ?? ???????? ???? ??? ???????????? ?? ???????????? ????????? ??? ???????. ?? ???????? ?? ??????????? ??? ??????? ?? ?????????? ??? ?? ????? ?????, ????? ???? ????? 2,Definition of Geometric Tolerance Control: Geometric tolerances include parallelism, perpendicularity, coaxiality, etc. By precisely controlling these geometric tolerances, the accuracy of the product can be improved. ??? ??? ???: ?? ???? ????????????? ??????????? ??? ????? ????? ?????? ?? ??????? ????? ??? ??????? ?? ????????????????? ???? ?? ?????????, ??? ?? ??????????????????? ???? ?? ? 3, Definition of surface roughness control: The roughness of the part surface has a significant impact on accuracy. ??????: ????????? ??????? ??????????????? ??? ????????????? ?? ??????????? ????????, ??????????????????????????, ??????????? ?????????????? ????, subsequent processing techniques such as grinding and polishing can be used to further reduce surface roughness. 4,??? ????????? ??? ???? ??????????????? ???????????????: ?? ???? ??? ??????????????? ???????????????? ??? ???????????? ??? ??? ????? ?? ????????? ??????????????? ?????????????: ???? ?????????? ??????????????, ??? CNC ????, CNC ?????? ??????, ????????, ??., ??? ????????? ??????????????? ???? ??? ???????????, ??????? ????????? ?? ?????????? ??? ???????. 5,??????????? ???? ???????? ?????????: ??????????? ???????? ?? ????????????????, ????????? ?? ?????????????? ??? ????????? ??aku??????? ???? ??? ????????, ??? ???? ??????: ???? ????????????? ??? ?????????????, ????????? ????????? ???????????????? ??? ?????????????, ??? ????????????? ?????????? ??? ????????????? ??? ?????????? ???? ??? ???????????????? 6, ?? ????????? ???? measurement and inspection: ???? ???????????? ????????????????? ?? ????? ??? ????????? ?????? ??? ??? ???????????? ??? ???? ???????? ??? ?? ???????? ??????? ??? ??? ????? tools-action 7, ???????????? ????????? ????????: ???? ?? ???????????????, ????????????? ?????????? ????? ????????? ?? ??????????? ??? ????????? ??? ??????????, ??????? ????????? ??????: ?? ???????????? ??? ?????? ???? ??????????? ??? ????????????????, ?????? ?? ???????????? ??? ????????????? ???? ??? ?????????????? ??? ?? 8, Special methods and techniques for trial cutting: Obtaining specified dimensional accuracy through a repeated process of "trial cutting measurement adjustment trial cutting", suitable for single piece production. ????????????????: ?????? ??????? ?? ????????? ????????? ???? ??? ????? ??? ????????? ???? ??? ????????????, ??? ?????? ?? ??? ?????????? ???? ?? ?????????????????? ???? ?? ??? ?? ????? ???? ?????? ?? ?? ?????, ????????????????, ??????????, ??? ????cutting ????? ???????????? ???????? ???? ??? ???????????????, ?? ?? CNC ???????????? ????? ??????????????? ??????, ??? стабил