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一、问题提出我厂在修复中、小型零件成熟经验的基础上,已逐步将电刷镀工艺用于大部件的磨损超差修复上。通过几年来的实践证明:只要正确地选择掌握好此项工艺,大孔径的偏磨超差修复是完全可行的。例如,我厂在修理东风4型内燃机车时,每台机车有六个410牵引电机,电机在进行分解检查时,发现机座φ600和φ630孔处出现局部偏磨超差。按原厂修要求允许为φ600_(-0)~(+0.11)mm、φ630_(-0)~(+0.11)mm,而现在实际的局部偏磨超差为φ630_(+0)~(+0.11-0.03)mm、φ600~(+0.12-28)mm。以往只能采用扩大孔径尺寸,报废前后端盖方法来解决机座孔径的局部偏磨超差问题。不但耗用了大量的
First, the problem put forward I plant in the repair, the mature experience of small parts, based on the brush plating process has been gradually used for large parts of the wear tolerance repair. After several years of practice has proved that: as long as the correct choice to master the process, the large eccentric grinding mill offset tolerance is completely feasible. For example, when I repaired the Dongfeng 4 diesel locomotive, there were 6 410 traction motors per locomotive. When the motor was decomposed and checked, it was found that there was partial eccentric wear on the φ600 and φ630 holes in the machine base. According to the requirements of the original repair, φ600 _ (-0.0) ~ (+0.11) mm and φ630 _ (-0.0) ~ (+0.11) mm are allowed, but the actual partial wear tolerance is now φ630 _ (+0) ~ -0.03) mm, φ600 ~ (+0.12-28) mm. In the past can only be used to expand the aperture size, before and after the end of retirement cover method to solve the partial hole tolerance of partial wear ultra-poor. Not only consume a lot of