ラック形工具による歯車の二段転造(工具の歯型III)

Abstract

A profile error on tooth face of a rolled gear is often caused by an inclination to rolling direction. Then, the rack die teeth having the modificated form against the normal pressure angle were designed and experimentally investigated to improve the accuracy of the rolled involute surfaces. The pair die tools of rough rolling and the finish rolling were examined by rolling the worekpiece (module1.5,pressure angle 24.5°, number of teeth 28 and whole depth 2.7mm). The involute surfaces of workpiece after rough and finish rolling were compared and investigated respectively. As the resurt, the involute profile of a rolled pinion was improved. That is, in the rough and finish gear rolling by rack type tools, it was revealed that the new modified tools were useful for this system.