互换性与测量技术基础 第二章答案 王伯平

1、第二章 光滑圆柱体结合的公差与配合孔或轴最大极限尺寸孔或轴最大极限尺寸最小极限尺寸上偏差下偏差公差尺寸标注10 0.0150.03018 0.017030 0.0120.00940 0.0500.11260 0.0410.01185 00.022孔: 109.9859.970-0.015-0.0300.015孔: 1818.01718+0.01700.017孔: 3030.01229.991+0.012-0.0090.021轴: 4039.9539.888-0.050-0.1120.062轴: 6060.04160.011+0.041+0.0110.030轴: 858584.9780-0.02

2、20.0222.1) X= 0.033- (-0.098) = 0.131mmmaxX= 0 - (-0.065) = 0.065mmminT = | 0.131-0.065 | = 0.066mmf2) Ymax= 0 0.060 = -0.060mmY= 0.0300.041 = -0.011mmminT = | -0.060+0.011 | = 0.049mmf3) X= 0.007- (-0.016) =0.023mmmaxY= -0.0180 = -0.018mmmaxT = | 0.023(-0.018)| = 0.041mmf4) X= 0.039 - 0.002 = 0.037

3、mmmaxY= 00.027 = -0.027mmmaxT =|0.037(-0.027)| = 0.064mmf5) X= 0.074(-0.140) = 0.214mmmaxX= 0 - (-0.030) = +0.030mmminT =| 0.2140.030 | = 0.184mmf6) X=0.009(-0.019) = 0.028mmmaxY= -0.0210 = -0.021mmmaxT =| 0.028(-0.021) | = 0.049mmfH8(0.039 )第 2 题3.(1) 500f 7(0.025)0.050G10(0.130 )（2）800.010h10(0)0.

4、120K7(0.006 )Xmax = 0.089mmXmin = 0.025mm基孔制、间隙配合Xmax = 0.250mmXmin = 0.010mm基轴制、间隙配合（3）300.015X= 0.019mm= -0.015mm基轴制、过渡配合h6(00.013maxmaxH8(0.063 )（4）1400r8(0.126 )0.063H7(0.040 )Ymax= -0.126mmmin= 0mm基孔制、过盈配合（5）1800u6(0.235 )0.210M6(0.004 )Xmax= -0.235mmmin= -0.170mm基孔制、过盈配合（6）180.015h5(0)0.008H7(

5、0.025 )（7）500XmaxX= 0.004mm= 0.033mmYmax= -0.015mm基轴制、过渡配合= -0.008mm基孔制、过渡配合js6(0.008 )0.008H7(0.035 )（8）1000k6(0.025 )0.003H7(0.021)maxXmaxmax= 0.032mmYmax= -0.025mm基孔制、过渡配合（9）300n6(0.028)0.015K7(0.007 )Xmax= 0.006mmmax= -0.028mm基孔制、过渡配合（10）500.018h6(00.016Xmax= 0.023mmmax= -0.018mm基轴制、过渡配合D9(0.174

6、 )F8(0.053 )H7(0.025)H7(0.021)4.(1) 600.100(2) 300.020(3) 500(4) 300h9(0)h8(0)k6(0.018)s6(0.048)0.074U7(0.061 )(5) 500.0860.0330.0020.035h6(0)0.0165. X= 0.025mm, X= 0.066mm . 配合公差T =| 0.066 0.025| = 0.041mm ，minmaxfT = T + Tfh查表，孔为7 级，轴为6 级Th=0.025mm Ts= 0.016mm 符合要求.H7(0.025 )选400。f 6(0.025)0.041验算

7、：Xmax=0.025 (-0.041) = 0.066mm ; Xmin= 0 (-0.025) = 0.025mm . 符合题意。6.1） T=|X -X|=|0.086-0.020|=0.066mm, T = T + T查表选T = T=0.033mm.fmaxminfhshsH8(0.033 )8 级公差。基孔制H8,根据X查表选轴为f8，选250。 验 算X X 后符合要求。minf8(0.020 )0.053maxmin（2）T=|Y-Y |=|0.076-(-0.035)|=0.041mm ,T = T+ T 查表选T为 7 级，T 为 6fminfhshs级，基孔制H7，根据Y

8、H7(0.025 )查表选轴为u6，选400验算Y 、后符合要求。minu6(0.076 )0.060maxmin(3) Tf =|Xmax-Ymax|=|0.046-(-0.032)|=0.078mm , Tf = Th + Ts查表选Ts7Th为 8 级，基轴制h7，根据XK8(0.014 )和Y 查表选孔为K8，选600.032。验算X 、Ymax后符合要求。50maxmaxh7(0)0.030max l (a+at 2黄铜玻璃H8(0.039 )(19.510-6+810-6)(20+50)=0.048mm,2查表500, 0.039-(-0.050)+0.048=0.137mm，0-(-0.025)+0.048=0.073mmf 7(0.025)0.0500.1370.075mm, 原设计 50H8/f7 配合不合适。0.075-0.048=0.027mm, 0.009-0.048=-0.039mm, 装配时的间隙量应为 -0.039H8(0.039 )0.027mm之, 选500n6(0.033 )0.017验算后满足要求。95 l=222(150-20)+12(100-20)10-6=0.181mm; 0.04+0.181=0.221mm,0.097+0.181 =0.278m