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众所周知,尽管轮齿整个齿形经过磨削的齿轮精度有所提高,但这种轮齿的抗弯强度却降低了。在磨削齿根带台肩的轮齿时抗弯强度也会减小,这是由于台肩造成了应力集中的缘故。这些不良现象可通过挖根的齿槽来加以消除。在成批生产齿轮时,目前形成挖根的方法是使用齿顶带触角的滚刀(即使齿顶增厚),这样就可保证在加工时获得所要求的工件齿根过切。现在苏联国内加工业中,采取三种基本型式的挖根滚刀(图1):1、齿顶带触角的普
As we all know, although the gear tooth profile of the whole toothed grinding has improved, but the bending strength of such teeth is reduced. The flexural strength will also be reduced when grinding the teeth on the dedendum shoulder, due to the stress concentration on the shoulder. These undesirable phenomena can be eliminated by digging the root of the alveolus. The current method of digging the roots of a gear is to use a hob with an addendum at the tips of the teeth (even if the top of the tooth is thicker) so that the desired workpiece undercut is obtained during machining. Now the Soviet Union’s domestic processing industry, take three basic types of root cutter (Figure 1): 1, addendum with the Cape general