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一、前言XF－125初级传动齿轮自1994年生产以来，一直碰到花键孔严重的缩孔现象。由于花键孔缩孔，使不合格品大为增加。为此，本文作者从原材料、热处理工艺、冷加工应力等多方面进行了试验。试验数据表明，花键孔的缩孔变形由多方面因素造成，如掌握了这些规律，就可以解决初
First, the foreword XF-125 primary transmission gear since 1994 production, has been hit spline hole serious shrinkage phenomenon. Due to spline hole shrinkage, so that non-conformance products greatly increased. To this end, the author of the paper from the raw materials, heat treatment process, cold working stress and many other aspects of the test. Test data show that the shrinkage of spline hole shrinkage caused by many factors, such as the mastery of these laws, we can solve the early