《互换性与技术测量》之滚动轴承详解.ppt

Example: Precision grade of Radial ball bearing is E. Inner race rotate with shaft and inner race diameter d=50mm. Outer race is stationary and outer race diameter D=90mm. Directional load P= 4000N, rated load Cr=31400N. 例题：精度等级为E级的径向球轴承，内圈随轴旋转，内圈直径d=50mm，外圈静止，外圈直径D=90mm，定向负荷P=4000N，额定负荷Cr=31400N。 Question问题： 1.Tolerance zone code of shaft and housing fitted with bearing? 与滚动轴承配合的轴和壳体孔的公差带代号？ 2. Geometrical tolerance and surface finish of shaft journal? 轴颈的形位公差和表面粗糙度? 3. Geometrical tolerance and surface finish of shaft shoulder? 轴肩的形位公差和表面粗糙度? 4. Geometrical tolerance and surface finish of housing journal? 壳体孔颈的形位公差和表面粗糙度? 5. Geometrical tolerance and surface finish of housing shoulder?壳体孔肩的形位公差和表面粗糙度? 1.Tolerance zone code of shaft and housing fitted with bearing?与滚动轴承配合的轴和壳体孔的公差带代号？ Solution: P=0.127Cr 正常负荷 table5.17 or table5.19 查附表4.2，4.3 得轴公差带代号k5,壳体孔公差带代号H6 2. Geometrical tolerance and surface finish of shaft journal? 轴颈的形位公差和表面粗糙度? Solution： table5.2 or附表4.4 得圆柱度2.5微米，表面粗糙度0.63微米； 3. Geometrical tolerance and surface finish of shaft shoulder? 轴肩的形位公差和表面粗糙度? Solution : 附表4.4 得端面圆跳动8微米，表面粗糙度1.25微米； 4. Geometrical tolerance and surface finish of housing journal? 壳体孔颈的形位公差和表面粗糙度? Solution： 圆柱度6微米，表面粗糙度1.6微米； 5. Geometrical tolerance and surface finish of housing shoulder? 壳体孔肩的形位公差和表面粗糙度? Solution： 端面圆跳动15微米，表面粗糙度2微米。 结束 Width or height series 宽（高）度系列代号 Table 2-18 ～ Table 2-20 附录表2-18 ～ Table 2-20 请点击鼠标左键显示后面内容 Rolling bearing codes 滚动轴承的代号 According to national standards, structure, dimension, tolerance degree and technical requirements are represented by the code of the rolling bearing. 按国家标准规定，滚动轴承的结构尺寸、公差等级、技术性能等特性由滚动轴承代号来表示。 The bearing type code 轴承类型代号 Dimension series code 尺寸系列代号 Inner diameter code内径代号 Pre-code 前置代号 Base code基本代号 Post-code后置代号 00? d=10mm 01? d=12mm 02? d=15mm 03? d=17mm Upwards of 04 ： (04以上) d= xx ? 5mm The pre- and post-codes are supplementar