蒸汽水雾中电火花线切割精加工实验  

Experiments on finishing of wire cut electrical discharge machining in steam water mist

作　　者：王彤[1] 王俊棋[1] 葛军 邱峰[1] WANG Tong;WANG Junqi;GE Jun;QIU Feng(School of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin 150080, China)

机构地区：[1]哈尔滨理工大学机械动力工程学院,黑龙江哈尔滨150080

出　　处：《哈尔滨工程大学学报》2017年第10期1595-1601,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(50975069)

摘　　要：为探讨蒸汽水雾中第二次切割的加工参数对表面粗糙度和切割速度的影响规律,并找到满足多项指标要求下加工参数的优化方案,在往复走丝线切割加工中,采用了一种多介质的多次切割新工艺,第一次切割在乳化液中,第二次切割在蒸汽水雾中。通过单因素实验分析了加工参数对工艺指标的影响规律,通过正交实验,利用灰色关联分析法,将多目标参数优化转为单一目标灰关联度的优化。分析得知脉冲宽度和工作台进给速度对综合工艺指标影响显著,经实验验证脉冲宽度16μs,工作台进给速度2档,峰值电流4 A,偏移量30μm,蒸汽水雾量30 ml/min的加工方案更优。To explore the influence of parameters of second cut in steam mist on surface roughness and cutting speed, as well as to find the optimum processing parameters to meet the requirements of a number of indicators, this study proposed a new procedure called multi-media multiple cutting in high-speed wire cut electrical discharge machining, in which the first cut is processed in emulsified liquid and the second cut is processed in steam water mist. The influence of process parameters on surface roughness and cutting speed was analyzed through a single-factor experiment. Through an orthogonal experiment, the multi-objective optimization problem was transformed into a single-objective optimization problem based on signal-to-noise ratio with the use of gray relational analysis. Results show that pulse duration and worktable feed significantly affect the comprehensive process index. In addition, the experiment shows that a pulse width of 16 μs, a table feed speed of two gears, a peak current of 4 A, an offset of 30 μm, and steam mist amount of 30 ml·min- 1 improve the processing index.

关 键 词：电火花线切割 精加工 蒸汽水雾 单因素实验 正交实验 多目标优化 灰色关联分析法 

分 类 号：TG484[金属学及工艺—焊接]