Electrical discharge machining of 6061 aluminium alloy  

6061铝合金的电火花加工（英文）

作　　者：A.PRAMANIK A.K.BASAK M.N.ISLAM G.LITTLEFAIR 

机构地区：[1]Department of Mechanical Engineering,Curtin University [2]Adelaide Microscopy,the University of Adelaide [3]School of Engineering,Deakin University

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第9期2866-2874,共9页中国有色金属学报（英文版）

摘　　要：The wire electrical discharge machining（EDM） of 6061 aluminium alloy in terms of material removal rate,kerf/slit width,surface finish and wear of electrode wire for different pulse on time and wire tension was studied.Eight experiments were carried out in a wire EDM machine by varying pulse on time and wire tension.It is found that the material removal rate increases with the increase of pulse on time though the wire tension does not affect the material removal rate.It seems that the higher wire tension facilitates steady machining process,which generates low wear in wire electrode and better surface finish.The surface roughness does not change notably with the variation of pulse on time.The appearance of the machined surfaces is very similar under all the machining conditions.The machined surface contains solidified molten material,splash of materials and blisters.The increase of the pulse on time increases the wear of wire electrode due to the increase of heat input.The wear of wire electrode generates tapered slot which has higher kerf width at top side than that at bottom side.The higher electrode wear introduces higher taper.在不同脉冲时间和导线张力下,研究6061铝合金电火花线切割加工过程中材料的去除率、切口/狭缝宽度、表面光洁度和线电极磨损,通过改变脉冲时间和导线张力,在电火花线切割加工机床上进行了8次实验。结果表明,随着脉冲时间的延长,材料的去除率增加,但导线张力不影响材料的去除率。较高的导线张力有利于促进加工工艺的稳定性,产生较低的线电极磨损和更好的表面光洁度。随着脉冲时间的变化,表面粗糙度没有明显变化。在所有加工条件下,表面外观非常相似。加工后表面包含凝固熔融材料、飞溅材料和气泡。由于热量输入的增加,脉冲时间的延长增大了线电极的磨损。线电极的磨损产生了斜槽,该斜槽正面的切口宽度比底部的宽。较高的电极损耗会产生较高的锥度。

关 键 词：wire electrical discharge machining（EDM） 6061 aluminium alloy material removal rate kerf width surface finish 

分 类 号：TG661[金属学及工艺—金属切削加工及机床] TG146.21[一般工业技术—材料科学与工程]