The three spline broach with radius pendulum profile is developed to broach the internal surface of motorcycle clutches.

研制了用于加工摩托车离合器外环内孔表面的三键圆弧摆线拉刀，分析了拉刀的结构特点和设计、制造要点。

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It was found that the broach was locally overheated due to band segregation of carbide, and under-tempered. These factors caused fracture of broach as a result of high internal stress.

严重的碳化物带状偏析，使拉刀产生局部淬火过热和回火不足，造成内应力急剧增高，最终导致拉刀断裂。

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In this article, rectangular spline broach of the concentric form and internal diameter centering is introduced; and its design characteristics and advantages of the application are depicted.

本文介绍同心式内径定心矩形花键拉刀的设计特点和使用中的优点。

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