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1·Design and cutting condition of carbide hob with radial negative front Angle were discussed.

论述了径向负前角硬质合金滚刀的设计及切削条件。

2·It also analyzes why the crack happens while the carbide hob is being welded and ground, and advances measures to deal with it.

分析了硬质合金滚刀焊接、磨削产生裂纹的原因，并提出了解决办法。

3·The principle for the selection of technology parameter and the main points for processing the tooth surface by scraping with the carbide hob were stated.

介绍了中硬齿面齿轮的刮削工艺，叙述了用硬质合金滚刀对齿面进行刮削加工的工艺参数选择原则及刮削要点。