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剃削渐开线圆柱齿轮时，轮 齿侧面上常常形成“Ｚ”形按触压痕，这个现象在汽车工业和机床制造工业中都会观察到，如图１所示。对大斜角齿和纵向变异齿这个特征最为明显。但直到现在还没有找出原因和提出消除方法。 有关技术文献中曾分析剃削大斜角的斜齿圆柱齿轮及其产生“Ｚ
When shaving involute spur gears, “Z” indentations are often formed on the sides of the gear teeth, as observed in the automotive and machine tool industries, as shown in Figure 1. This feature is most pronounced for large bevel and longitudinal variation teeth. But until now we have not found out the reasons and put forward the elimination method. The technical literature has been analyzed shaving large bevel helical gear and its generation "Z.