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1、未注公差等級根據(jù)國標GB/T1804-2000<<一般公差未注公差的線性和角度尺寸的公差>>線性尺寸,我司決定選用等級(m)為未注公差等級的加工尺寸與角度的公差。對未注公差的檢驗與控制要求,按GB/T1804-2000。表1?線性尺寸的極限偏差數(shù)值?????????????????mm公差等級基本尺寸分段0.5~3>3~6>6~30>30~120>120~400>400~1000>1000~3000>2000~4000精密f±0.05±0.05±0.1±0.15±0.2±0.3±0.5—中等m±0.1±0.1±0.2±0.3±0.5±0.8±1.2±2粗糙c±0.2±0.3±0.5±
2、0.8±1.2±2±3±4最粗v—±0.5±1±1.5±2.5±4±6±8表2?倒圓半徑和倒角高度尺寸的極限偏差數(shù)值????????????????mm公差等級基本尺寸分段0.5~3>3~6>6~30>30精密f±0.2±0.5±1±2中等m粗糙c±0.4±1±2±4最粗v?注:倒圓半徑和倒角高度的含義參見GB/T6403.4。???表3給出了角度尺寸的極限偏差數(shù)值,其值按角度短邊長度確定.對圓錐角按圓錐素線長度確定。表3?角度尺寸的極限偏差數(shù)值公差等級長度分段,mm~10>10~50>50~120>120~400>400精密f±1°±30’±20’±10’±5’中等m粗糙c±1°3
3、0’±1°±20’±15’±10’最粗v±3°±2°±1°±30’±20’未注尺寸公差按GB/T1804-m?線性尺寸的極限偏差數(shù)值(GB/T1804-2000)?(mm)?公差等級????基?本?尺?寸?分?段?????0.5~3????>3~6????>6~30????>30~120????>120~400????>400~1000????>1000~2000?精密?f????±0.05????±0.05????±0.1????±0.15????±0.2????±0.3????±0.5?中等?m????±0.1????±0.1????±0.2????±0.3????±0.5???
4、?±0.8????±1.2?粗糙?e????±0.2????±0.3????±0.5????±0.8????±1.2????±2????±3?最粗?v????--????±0.5????±1????±1.5????±2.5????±4????±6?倒圓半徑和倒角高度尺寸的極限偏差(GB/T1804-2000)?mm?公差等級????基?本?尺?寸?分?段?????0.5~3????>3~6????>6~30????>30?精密?f????±0.2????±0.5????±1????±2?中等?m?????????????????粗糙?e????±0.4????±1????±2????
5、±4?最粗?v?????????????????角度尺寸的極限偏差數(shù)值(GB/T1804-2000)?公差等級????基?本?尺?寸?分?段?????~10????>10~50????>50~120????>120~400????>400?精密?f????±1o????±30′????±20′????±10′????±5′?中等?m?????????????????????粗糙?e????±1o30′????±1o????±30′????±20′????±10′?最粗?v????±3o????±2o????±1o????±30′????±20′?未注形位公差按GB/T1184-K?直
6、線度和平面度未注公差值(GB/T1184-1996)?(mm)?公差等級????基?本?長?度?范?圍?????≤10????>10~30????>30~100????>100~300????>300~1000????>1000~3000?H????0.03????0.05????0.1????0.2????0.3????0.4?K????0.05????0.1????0.2????0.4????0.6????0.8?L????0.1????0.2????0.4????0.8????1.2????1.6?垂直度未注公差值(GB/T1184-1996)?(mm)?公差等級????基?本
7、?長?度?范?圍?????≤100????>100~300????>300~1000????>1000~3000?H????0.2????0.3????0.4????0.5?K????0.4????0.6????0.8????1?L????0.4????1????1.5????2?對稱度未注公差值(GB/T1184-1996)?(mm)?公差等級????基?本?長?度?范?圍?????≤100????>100~300????>300~1000????>10