这种误差影响了齿形精度，特别是负前角插齿刀，现行的设计方法不能满足齿形精度。
This error has influenced the precision of gear, especially, when negative rake Angle of gear-shaped cutter is used, the current design method has not reguired the profile precision.
若辊模设计不合理或加工方法不当，将影响工件齿轮的齿形精度，产生噪声，降低使用寿命。
If the rolling dies are not preciously designed or the machining operation is not properly implemented, there is an influence on the profile accuracy, noise and service life of the workpiece gears.
渐开线凸轮是靠模式齿轮磨床生成渐开线齿形的重要附件，其精度直接决定着被磨齿轮的齿形精度。
Involute CAM is an important attachment which produce involute profile in the copying gear grinder; the accuracy of which directly decide the profile accuracy of gear which is grinded.
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