高压贴附喷液对线切割NdFeB材料切割效率与丝损的影响  

Effect of WEDM on the Cutting Efficiency and Wire Loss of NdFeB Material by High Pressure Liquid Spraying

作　　者：滕凯[1] 张栋梁[1] 刘文君[1] TENG Kai;ZHANG Dong-liang;LIU Wen-jun(Xuzhou Institute of Technology,Jiangsu Xuzhou 221018,China)

机构地区：[1]徐州工程学院,江苏徐州221018

出　　处：《机械设计与制造》2018年第12期150-152,156,共4页Machinery Design & Manufacture

基　　金：江苏省高校自然科学研究项目(15KJB460016);徐州市科技计划项目(KC16HQ238)

摘　　要：对烧结钕铁硼(NdFeB)永磁材料进行了常压浇注与高压喷液两种供液方式下的电火花线切割加工对比试验。试验研究发现,在大峰值电流、小脉间和高速运丝的条件下,选择合适的喷液压力和脉冲宽度,可调节气化与蒸发、熔化再凝固、整体颗粒脱落以及微破碎等四种蚀除方式所占的比例,有效增加极间的工作液进入量和流速,提高电蚀粒子和气泡等电蚀产物的排出,较常压浇注方式切割效率提高35.46%,丝损降低18.75%。The comparative test of WEDM of NdFeB materials was carried out,by means of two kinds of liquid supply methods, atmospheric pressure pouring and high pressure spraying. The study found that in the peak current, small pulse and high speed wire transport situation, choose appropriate spray pressure and pulse width adjustable, gasification and evaporation, melting and solidification, the whole particle shedding and the proportion of four kinds of micro fracture erosion mode of. This effectively increases the amount of working fluid entry and flow rate, and increases the discharge of electric erosion particles and bubbles. Compared with the normal pressure pouring mode, the cutting efficiency is increased by 35.46% and the wire loss is reduced by about 18.75%.

关 键 词：钕铁硼 电火花线切割 高压喷液 切割效率 丝损 蚀除方式 

分 类 号：TH16[机械工程—机械制造及自动化] TG661[金属学及工艺—金属切削加工及机床]