SUS304不锈钢ELID镜面磨削正交化实验研究

SUS304不锈钢具有高耐腐耐磨性和良好的综合性能而被广泛应用,但其高韧性和低导热性使传统的SUS304不锈钢磨削或车削工艺存在一定困难。在线电解修整ELID(Electrolytic in-process dressing)磨削技术能有效地用于SUS304不锈钢镜面磨削加工。本文主要对SUS304不锈钢进行ELID镜面磨削正交化实验研究以获得合理的工艺参数。首先利用#325砂轮进行7个影响因素2水平的正交磨削实验,获得初步的优化参数,然后利用#1200砂轮进行3个影响因素2水平的正交镜面磨削实验。通过改变削件砂轮转速、X和Y平台移动速度、进给率和ELID电源件等各种磨削条件,获得优化后的磨削工艺参数,进行了相应的磨削验证,并讨论了工艺参数对磨削特性的影响。研究了不同砂轮磨粒对表面粗糙度的影响,使用#8000金刚石砂轮对SUS304不锈钢镜面磨削,获得表面粗糙度Ra=3.6 nm。

Orthogonal Experiment of ELID Mirror Grinding for SUS304 Stainless Steel

SUS340 stainless steel is widely used because of high corrosion resistance,wear resistance and combination property.The high toughness and low thermal conductivity make SUS304 stainless steel difficult to be ground or lathed in conventional machining.ELID(Electrolytic in-process dressing) grinding technique is an effective grinding process for mirror grinding SUS304 stainless steel.In order to botain optimized grinding parameters for ELID grinding SUS304 stainless steel,orthogonal grinding experiment with seven factors and two levels using #325 grinding wheel and with three factors and two levels using #1200 grinding wheel were conducted.Through changing rotation speed of grinding wheel,speeds of X and Y tables,feed rate and ELID conditions,the influence of grinding parameters on the grinding characteristics were discussed.ELID mirror grinding of SUS304 stainless steel plane was conducted using various grain sizes,and surface roughness of 3.6 nm in Ra was achieved using #8000 grinding wheel.