尺寸与角度自由公差.doc

未注尺寸公差按GB/T1804-m?线性尺寸的极限偏差数值（GB/T1804-2000）?（mm）?公差等级????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????±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? 倒圆半径和倒角高度尺寸的极限偏差（GB/T1804-2000）?mm?公差等级????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????±4?最粗?v????????????????? 角度尺寸的极限偏差数值（GB/T1804-2000）?公差等级????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?直线度和平面度未注公差值（GB/T1184-1996）?（mm）?公差等级????基?本?长?度?范?围?????≤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）?公差等级????基?本?长?度?范?围?????≤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? 对称度未注公差值（GB/T1184-1996）?（mm）?公差等级????基?本?长?度?范?围?????≤100????＞100~300????＞300~1000????＞1000~3000?H????0.5?K????0.6????0.8????1?L????0.6????1????1.5????2? 圆跳动的未注公差值（GB/T1184-1996）?（mm）?公差等级????圆跳动公差值?H????0.1?K????0.2?L????0.3? 3.表面粗糙度? 　零件的表面都应该注明粗糙度的等级。如果较多的表面具有相同的表面粗糙度等级，则要集中在图样右上角标注，并加“其余”字样。?　粗糙度等级的选择，一般可以根据对各表面的工作要求和尺寸精度等级来决定，在满足工作要求的条件下，不得随意提高等级。?1)取样长度和评定长度的选用值（GB/T1031-1995）?Ra(μm)????Rz(μm)????取样长度l(mm)????评定长度l?n(mm)?＞0.003~0.02????＞0.025~0.10????0.08????0.4?＞0.02~0.10????＞0.1~0.50????0.25????1.25?＞0.1~2.0????＞0.50~10.0????0.8????4.0?＞2.0~10.0????＞10.0~50????2.5????12.5?＞10.0~80????＞50~320????8.0????40.0?2)轮廓算术平均偏差Ra的数值（GB/T1031-1995）?（μm）?第1系