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通过改进国产C8924铲齿车床，扩大加工范围，解决了磨削45°螺旋角梯形螺施拉刀的工艺问题，为大螺旋角拉刀的制造提供了一个可行的途径。
By improving the domestic C8924 shoveling lathe and expanding the processing range, the technical problems of grinding the 45 ° helical angle trapezoidal screw broach are solved, which provides a feasible way for manufacturing the large helical broach.