再论单键键槽对称度误差的检测与计算

对GB195 8 80《形状与位置公差检验规定》中推荐的单键键槽对称度误差检测的翻转打表法提出质疑 ,认为单键键槽对称度误差应是其截面误差和键长误差的综合结果 ;运用解析几何方法推导出单键键槽对称度误差与截面误差和键长误差的关系式 ,并分析了这两种误差对测量结果的影响系数 ,指出影响单键键槽对称度误差的主要因素是键长方向的对称度误差。

Re-Dissertation on Measurement and Calculation of Single Keyway Symmetry Error

The test method for the symmetry error of single keyway recommended in the standard about “form and position tolerance. inspection provision" is oppugned. It is considered that the single keyway symmetry error should be the comprehensive result of the section deviation and deviation in keyway length. The relationship formula between the two deviations and the single keyway symmetry error is deduced with the analytic geometry. The influence coefficients of the two deviations to the measuring results are analyzed. And then the conclusion is bring up that the major factor effecting the single keyway symmetry error is the symmetry deviation in keyway length.