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粗精复合内径定心渐开线花键拉刀是一种新型结构的拉刀，可将切削余量分解，粗、精拉削一次完成。笔者对此种拉刀进行了研究论证，目前国内尚无同类产品。在对有关工件及拉床测绘计算后，确定拉刀的型式为粗精复合内径定心渐开线，并增加了中间花键定位齿及内径定心，提高了拉
Coarse caliper inner diameter centering involute spline broach is a new type of broach, the cutting allowance can be decomposed, coarse, fine broaching completed. I broach this kind of research and feasibility studies, at present there is no similar products. After calculating the relevant workpieces and broaching tools, the type of broach is determined to be the roughing compound inner diameter centering involute and the intermediate spline positioning tooth and the inner diameter centering are increased to increase the pulling