ELID沟道成形磨削氧化膜特性及影响作用实验

Experimental on Characteristics and Effect of Oxide Layer in ELID Groove Profile Grinding

针对ELID沟道成形磨削特点,研究了磨削过程中氧化膜的特性及其影响作用。探讨分析了氧化膜的电流表征、氧化膜在沟道成形磨削中的状态变化以及氧化膜状态对磨削力和表面粗糙度的影响。实验过程中,电解电流从1 A增长到4 A,氧化膜厚度从35.33!m减小到11.07!m,法向磨削力从7.06 N增长到36.12 N,切向磨削力从1.62 N增长到4.47 N;垂直于磨削方向的表面粗糙度由0.256!m增长到0.355!m,平行于磨削方向的表面粗糙度由8 nm增长到13 nm。结果表明,氧化膜越厚,磨削力和表面粗糙度越小;氧化膜越薄,磨削力和表面粗糙度越大。

The characteristics and mechanism of the oxide layer in ELID groove profile grinding process were investigated. The non-uniform contact during ELID groove grinding and the effect of oxide layer on the grinding force and the surface roughness were studied. As the current increases from 1 A to 4 A,the thickness of oxide layer decreases from 35.33 !m to 11. 07 !m. Meanwhile,the normal grinding force increases from 7. 06 N to 36. 12 N,and the tangential grinding force increases from 1. 62 N to 4. 47 N. Ravincreases from 0. 256 μm to 0. 355 μm,and Rapincreases from 8nm to 13 nm. The result indicates that as the thickness of oxide layer decreases,the grinding force and surface roughness increase,while as the thickness of oxide layer increases,the grinding force and surface roughness decrease.