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我厂担负着130汽车齿轮的生产任务,78年3月份以前,在磨削直齿轮和斜齿轮的内孔时,我们采用滚柱(滚针)做为节圆定位夹具,这种滚柱对直齿轮使用还可以,但对斜齿轮,特别是螺转角较大的斜齿轮,当涨环打紧之后,滚柱就很容易断掉,因而不能适应生产的要求。后来学习了兄弟单位的先进经验,设计成V形阿基米德螺旋线凸轮作为节圆定位夹具。通过一年多的实践证明,这种夹具比通常使用的节圆定位夹具结构简单可靠,制造方便,适用于中小批量齿轮生产单位。
I plant responsible for the production of 130 car gear mission, March 78 years ago, when grinding the spur and helical gear bore, we use the roller (needle) as a pitch positioning fixture, this roller pair Spur gear can also be used, but for helical gears, especially helical gears with larger helix angles, the rollers can be easily broken when the tension ring is tightened so that they can not be adapted to production requirements. Later learned the advanced experience of brothers units, designed as a V-shaped Archimedes spiral cam as a pitch positioning fixture. After more than a year of practice, this fixture has the advantages of simple structure and reliability compared with the commonly used pitch circle fixture, and is convenient for manufacturing. It is suitable for medium and small-batch gear production units.