在煤矿机电设备的检修过程中,常常会遇到一些轴的轴承位或轴瓦因长时间运行磨损,致使外(内)径的公差超出配合范围而不能正常使用,一根轴或一副轴瓦少着数百元,多着数千元。如果仅因此而使一根轴或一副轴瓦报废无疑会增加原煤成本,有时会因一时购不到配套的轴或轴瓦影响原煤生产。许疃煤矿在日常检修中利用堆焊、翻砂和电刷镀等超差修正技术对电机轴、副井电机轴瓦、副井天轮轴瓦等工件成功地进行了超差修正,取得了一定的经济效益并保证了矿井的正常生产。 In the mine mechanical and electrical equipment maintenance process, often encounter some shaft bearing bits or bushings wear and tear due to prolonged operation, resulting in outside (inside) diameter tolerance can not be used beyond the scope of cooperation, a shaft or a bush less Hundreds of dollars, more than a few thousand dollars. If only a single shaft or a bearing scrap will undoubtedly increase the cost of raw coal, sometimes due to the temporary purchase of the shaft or bearing can not affect the production of coal. Xu 疃 coal mine in the daily maintenance of the use of welding, sand and brush plating and other tolerance correction technology on the motor shaft, auxiliary shaft motor bearings, auxiliary shaft flange bearings and other workpieces were successfully over-tolerance correction, and achieved a certain economy Benefit and ensure the normal production of the mine.