附录三加工余量参数表

1、附录三 加工余量参数表表1粗车、半精车外圆的加工余量 (单位：mm)零件基本尺寸经过热处理与未经热处理 零件的粗车半精车未经热处理经热处理长 度20020040020020040020020040036610101818303050508080120120180180250250315-0.5-0.8-1.51.70.81.01.01.31.51.71.01.31.31.52.02.21.31.31.31.52.02.21.41.51.51.92.32.51.51.81.82.02.52.81.51.81.82.02.52.81.82.02.02.32.830.2.02.32.32.53.03

2、.32.02.32.32.5注：加工带凸台的零件时，其加工余量要根据零件的全长和最大直径来确定。表2 精车外圆的加工余量 （单位：mm）轴的直径d零件长度L100100250250500500800800120012002000直径余量a101018183030505080801201201801802602603603605000.80.90.91.01.11.11.21.31.31.40.90.91.01.01.11.21.21.31.41.51.01.01.11.11.21.21.31.41.51.51.11.31.31.41.41.51.61.71.71.41.51.61.61.71.

3、81.91.91.71.81.92.02.02.12.2注：1.在单件或小批生产时，本表数值须乘上系数1.3，并化成一位小数，如1.11.31.43，采用1.4（四舍五入）。这时的粗车外圆的公差等级为14级。2.决定加工余量用轴的长度计算与装夹方式有关。3.粗车外圆的公差带相当于h12h13。表3磨削外圆的加工余量 (单位：mm)轴的直径d磨削性质轴的性质轴的长度L100100250250500500800800120012002000直径余量a10中心磨未淬硬淬硬0.20.30.20.30.30.4-无心磨未淬硬淬硬0.20.30.20.30.20.4-1018中心磨未淬硬淬硬0.20.30

4、.30.30.30.40.30.5-无心磨未淬硬淬硬0.20.30.20.30.20.40.30.5-1830中心磨未淬硬淬硬0.30.30.30.40.30.40.40.50.40.6-无心磨未淬硬淬硬0.30.30.30.40.30.40.30.5-3050中心磨未淬硬淬硬0.30.40.30.40.40.50.50.60.60.70.60.7无心磨未淬硬淬硬0.30.40.30.40.30.50.40.5-5080中心磨未淬硬淬硬0.30.40.40.50.40.50.50.60.60.80.70.9无心磨未淬硬淬硬0.30.40.30.50.30.50.40.6-80120中心磨未淬硬

5、淬硬0.40.50.40.50.50.60.50.60.60.80.70.9无心磨未淬硬淬硬0.40.50.40.50.40.60.50.7-120180中心磨未淬硬淬硬0.50.50.50.60.60.70.60.80.70.90.81.0无心磨未淬硬淬硬0.50.50.50.60.50.70.50.8-180260中心磨未淬硬淬硬0.50.60.60.70.60.70.70.80.80.90.91.1260360中心磨未淬硬淬硬0.60.70.60.70.70.80.70.90.81.00.91.1360500中心磨未淬硬淬硬0.70.80.70.80.80.90.80.90.91.01.

6、01.2注：1.在单件或小批生产时，本表的余量值应乘上系数1.2，并化成一位小数，如0.41.20.48，采用0.5（四舍五入）。2.决定加工余量用轴的长度计算与装夹方式有关。3.磨前加工公差相当于h11。表4精车端面的加工余量 (单位：mm)零件直径d零件全长L18185050120120260260500500余量a300.50.60.70.81.01.230500.50.60.70.81.01.2501200.70.70.81.01.21.21202600.80.81.01.01.21.42605001.01.01.21.21.41.55001.21.21.41.41.51.7长度公差-

7、0.2-0.3-0.4-0.5-0.6-0.8注：1.加工有台阶的轴时，每台阶的加工余量应根据该台阶的d及零件的全长分别选用。2.表中的公差系指尺寸L的公差。表5磨端面的加工余量 (单位：mm)零件直径d零件全长L18185050120120260260500500余量a300.20.30.30.40.50.630500.30.30.40.40.50.6501200.30.30.40.50.60.61202600.40.40.50.50.60.72605000.50.50.50.60.70.75000.60.60.60.70.80.8长度公差-0.12-0.17-0.23-0.3-0.4-0.

8、5注：1.加工有台阶的轴时，每台阶的加工余量应根据该台阶的d及零件的全长分别选用。2.表中的公差系指尺寸L的公差。表6按照基孔制7级公差（H7）加工孔的加工 （单位：mm）加工孔的直径直径钻用车刀镗以后扩孔钻粗铰精铰第一次第二次3456810121314151618202224252628303235384042454850607080901001201401601802.93.94.85.87.89.811.012.013.014.015.017.018.020.022.023.024.026.015.015.020.020.025.025.025.025.025.0303030303030

9、303030-2830.033.036.038.040.043.046.048.055.065.075.080.080.080.080.080.080.0-19.821.823.824.825.827.829.831.734.737.739.741.744.747.749.759.569.579.589.399.3119.3139.3159.3179.3-11.8512.8513.8514.8515.8517.8519.821.823.824.825.827.829.831.7534.7537.7539.7541.7544.7547.7549.7559.569.579.5-7.969.9611

10、.9512.9513.9514.9515.9517.9419.9421.9423.9424.9425.9427.9429.9331.9334.9337.9339.9341.9344.9347.9349.9359.969.979.989.999.8119.8139.8159.8179.83H74H7 5H7 6H7 8H7 10H7 12H7 13H7 14H7 15H7 16H7 18H7 20H7 22H7 24H7 25H7 26H7 28H7 30H7 32H7 35H7 38H7 40H7 42H7 45H7 48H7 50H7 60H7 70H7 80H7 90H7 100H7 12

11、0H7 140H7 160H7 180H7 注：1.在铸铁上加工直径到15mm的孔时，不用扩孔钻扩孔。2.在铸铁上加工直径为30到32mm的孔时，仅用直径为28与30mm的钻头钻一次。3.用磨削作为孔的最后加工方法时，精镗以后的直径根据表123查得。4.用金刚石细镗作为孔的最后加工方法时，精镗以后的直径根据表124查得。5.如仅用一次铰孔，则铰孔的加工余量为本表中粗铰与精铰的加工余量总和。表7按照基孔制8级公差（H8）加工孔的加工 （单位：mm）加工孔的直径直径钻用车刀镗以后扩孔钻铰第一次第二次34568101213141516182022242526283032353840424548506

12、07080901001201401601802.93.94.85.87.89.811.812.813.814.815.017.018.020.022.023.024.026.015.015.020.020.025.025.025.025.025.030.030.030.030.030.030.030.030.030.0-2830.033.036.038.040.043.046.048.055.065.075.080.080.080.080.080.080.0-19.821.823.824.825.827.829.831.734.737.739.741.744.747.749.759.569.5

13、79.589.399.3119.3139.3159.3179.3-15.8517.8519.821.823.824.825.827.829.831.7534.7537.7539.7541.7544.7547.7549.75-3H84H8 5H8 6H8 8H8 10H8 12H8 13H8 14H8 15H8 16H8 18H8 20H8 22H8 24H8 25H8 26H8 28H8 30H8 32H8 35H8 38H8 40H8 42H8 45H8 48H8 50H8 60H8 70H8 80H8 90H8 100H8 120H8 140H8 160H8 180H8 注：1.在铸铁上加

14、工直径到15mm的孔时，不用扩孔钻扩孔。2.在铸铁上加工直径为30、32mm的孔时，仅用直径为28、30mm的钻头钻一次。3.用磨削作为孔的最后加工方法时，精镗以后的直径根据表123查得。4.用金刚石细镗作为孔的最后加工方法时，精镗以后的直径根据表124查得。5.如仅用一次铰孔，则铰孔的加工余量为本表中粗铰与精铰的加工余量总和。表8磨孔的加工余量 (单位：mm)孔的直径d零件性质磨孔的长度L磨前公差IT115050100100200200300300500直径余量a10未淬硬淬硬0.20.2-0.091018未淬硬淬硬0.20.30.30.4-0.111830未淬硬淬硬0.30.30.30.4

15、0.40.4-0.133050未淬硬淬硬0.30.40.30.40.40.40.40.5-0.165080未淬硬淬硬0.40.40.40.50.40.50.40.5-0.1980120未淬硬淬硬0.50.50.50.50.50.60.50.60.60.70.22120180未淬硬淬硬0.60.60.60.60.60.60.60.60.60.70.25180260未淬硬淬硬0.60.70.60.70.70.70.70.70.70.80.29260360未淬硬淬硬0.70.70.70.80.70.80.80.80.80.90.32360500未淬硬淬硬0.80.80.80.80.80.80.80.

16、90.80.90.36注：1.当加工在热处理极易变形的、薄的轴套及其他零件时，应将表中的加工余量数值乘以1.3。2.如被加工孔在以后必须作为基准孔时，其公差应按7级公差来制定。3.在单件、小批生产时，本表的数值应乘以1.3，并化成一位小数。例如0.31.30.39，采用0.4（四舍五入）。表9平面加工余量 (单位：mm)加工性质加工面长度加工面宽度1001003003001000余量a公差()余量a公差()余量a公差()粗加工后精刨或精铣3003001000100020001.01.520.30.50.70.522.50.50.71.222.530.71.01.2精加工后磨削，零件在装置时未经校准3003001000100020000.30.40.50.10.120.150.40.50.60.120.150.15-0.60.7-0.150.15精加工后磨削零件装置在夹具中或用百分表校准3003001000100020000.20.250.30.10.120.150.250.30.40.120.150.15