Pre-tightening mechanism for improving tooth direction V value of powerful gear honing

A pre-jacking mechanism for improving the tooth direction V value of a powerful gear honing machine is installed on the feeding station side of the Praewema powerful gear honing machine and comprises a fixed base, a tip capable of moving to the feeding station to jack a workpiece is installed on the fixed base, and the tip is connected with an air cylinder driving the tip to move. According to the utility model, the pre-tightening mechanism is arranged to pre-tighten the workpiece before the workpiece is held by the main shaft, so that the problem of out-of-tolerance of the tooth direction V value caused by a cantilever of the short-shaft powerful honing machine is solved. 一种强力珩齿齿向V值改善预顶紧机构，其安装在Praewema强力珩齿机的上料工位侧，包括固定基座，所述固定基座上安装有可移动至上料工位处顶紧工件的顶尖，所述顶尖与驱动其移动的气缸连接。本实用新型通过设置一个预顶紧机构在主轴抱紧工件之前先对工件进行预顶紧，来解决短轴强力珩由于悬臂导致的齿向V值超差的问题。