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齿轮的切向误差由机床运动偏心(分度误差) 所引起;齿轮的几何偏心则引起径向误差,而周节累积误差△F_p,是上述两种误差综合影响的结果。因此检验△F_p,一项误差就可以评定齿轮运动准确性精度。需要说明的是,△F_p,是各齿廓在分度圆上的分度误差,误差是不连续的,误差曲线为折线。它没有直接反映出齿轮加工中各齿廓分布的不均匀。齿圈径向跳动△F_r是由几何偏心引起的,而几何偏心可能是加工中或装配时产生的。检验△F_r仅能控制齿轮径向误差。公法线长度变动△F_W来源于机床分度蜗轮偏心,检验△F_W仅能控制齿轮切向误差。由于△F_r和△F_W都不能同时反映切向
The tangential error of the gear is caused by the eccentricity of the machine tool (indexing error); the geometric eccentricity of the gear causes the radial error, while the cumulative error of the pitch ΔF_p is the result of the combined effect of the above two errors. Therefore, testing △ F_p, an error can be assessed gear accuracy accuracy. It should be noted that, △ F_p, is the indexing of each tooth profile on the pitch circle, the error is not continuous, the error curve is broken line. It does not directly reflect the gear profile of the uneven distribution of the tooth. Ring gear pulsation △ F_r is caused by the geometric eccentricity, and geometric eccentricity may be processed or assembly generated. Test △ F_r can only control the gear radial error. The change of the normal line length △ F_W comes from the eccentricity of the machine tool graduation worm gear, and the test △ F_W can only control the gear tangential error. As both △ F_r and △ F_W can not simultaneously reflect the tangential