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我是一名曲轴磨工,在磨削各种机车曲轴中发现:送修的曲轴经检测除了正常的磨耗出现轴颈椭圆度及锥度超差外,还普遍存在着一个严重问题,即同轴度超差。有一定数量的曲轴不得不越过一个修理级差。轴颈本应光加大0.25mm,但光不出来,只能光加大0.50mm。至使曲轴减少一次大修理周期,缩短了使用寿命。分析上述原因,多数内燃机是从事季节性作业,用后入库长期停放,至使曲轴一侧长时
I am a crankshaft grinder found in grinding all kinds of locomotive crankshafts: the repaired crankshaft has been tested in addition to normal wear and tear of the shaft ovality and taper tolerance, there is also a serious problem that the coaxial Out of tolerance. A certain number of crankshafts had to cross a repair level. Shaft should be light to increase 0.25mm, but the light does not come out, only light to increase 0.50mm. To reduce the crankshaft a major repair cycle, shortening the service life. Analysis of the above reasons, most of the internal combustion engine is engaged in seasonal operations, after storage with long-term storage, to the crankshaft long side