我厂以往在生产中型交流电机中,由于集电环加工质量不够理想,使产品火花等级偏高,碳刷磨损很快,影响了产品质量。经过多次观察与分析,认为集电环圆柱表面加工光洁度低是引起火花的主要原因之一。图纸要求光洁度为▽_8,而实际加工只达到▽_5。我厂曾用磨削加工集电环,但由于冷却液和金属微粒的影响使部件击穿率很高,只得改 In the past, I plant in the production of medium-sized AC motor, as the collector ring processing quality is not ideal, so that high sparkle product grades, carbon brush wear quickly, affecting product quality. After many observations and analyzes, it is considered that the low surface finish of the collector rings is one of the main causes of sparks. Drawings required smoothness ▽ _8, while the actual processing reaches only ▽ _5. I have used grinding mill collector, but due to the impact of coolant and metal particles so that the breakdown rate is very high, only to change