带有花锻孔的齿轮,齿面经热处理以後,往往影响它的内孔尺寸,既使是用高频淬火,也在所不免。若将工件再到拉床上拉削一次,虽然可将孔径拉大,但极易增加节 圆与花键孔中心的同心误差,所以必须用校正推刀(пp- )来校正。但若缺乏推床设备(目前我局各厂,这 种设备尚不多),便难以实 With a flower forging gear, tooth surface after heat treatment, it often affects the size of its bore, even if it is quenched with high frequency, but also inevitable. If the workpiece and then pull the broaching machine once, although the aperture can be widened, but it is easy to increase the pitch circle and spline hole center concentric error, it must be corrected push (пp-) to correct. However, if there is a lack of push-bed equipment (at present, I plant each factory, this equipment is not yet more), it is difficult to real