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在一些机械传动压路机的通用变速器中，移动齿套在花键轴上滑动性能的好坏直接影响着整机的摘挡、换挡性能，因此，移动齿套内花键孔加工精度的高低将直接影响变速器的使用性能和效果。通常情况下，内花键孔的加工难点主要是：齿套内花键孔及内花键齿在热处理后极易产生变形，
In some general transmission of mechanical transmission roller, the sliding performance of the moving gear sleeve on the spline shaft directly affects the pick-up and shift performance of the whole machine. Therefore, the precision of the spline hole movement in the moving gear sleeve will Directly affect the transmission performance and effectiveness. Under normal circumstances, the key to the processing of the key spline hole is: the spline hole and the spline gear tooth within the heat treatment can easily produce deformation,