电火花加工工件的尺寸精度受过切量影响，而过切量的大小主要取决于放电间隙和电机损耗。
The dimensional accuracy of electrical discharge machining(EDM) is greatly influenced by the overcut resulting from the discharge gap and electrode wear.
通过切削试验，分析了切削速度、背吃刀量以及切削液等参数改变时，对切削力及表面质量的影响。
Through cutting experiment, the influence on cutting force and surface quality was analyzed when change the parameters such as cutting speed, back cutting depth and cutting fluid and so on.
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