复合PAAS工作液与工件半浸液的深小孔电火花加工工艺  

Process research of EDM depth hole machining with dispersant by workpiece half infusion

作　　者：唐浩峰[1] 曹明让[1] 殷静凯 刘帅[1] 

机构地区：[1]太原理工大学机械学院,山西太原030024

出　　处：《制造技术与机床》2015年第4期159-162,共4页Manufacturing Technology & Machine Tool

基　　金：国家自然科学基金(51075294);山西省自然科学基金(2014011026-3)

摘　　要：现有电火花小孔机床在加工大深径比小孔时存在加工稳定性差、小孔质量差、相对电极损耗率大等技术难点。深入分析D703F电火花小孔加工机床的原理及特点,实验证明使用一定浓度分散剂聚丙烯酸钠(PAAS)作为工作液可大幅提高小孔加工速度、降低相对电极损耗,但随着加工小孔深径比变大,孔内加工环境变差、散热困难,PAAS工作液会产生碳化现象反而阻碍了正常加工。用PAAS工作液和工件半浸液复合的方法,使工件在加工时能良好散热,减缓PAAS工作液的碳化现象,正常发挥分散作用,从而达到高速加工大深径比小孔的目的。The existing small hole EDM machine tool in the deep processing of large- diameter ratio holes exists workpiece bad heat,working poor stability,chip removal difficult,the high relative electrode wear rate and other technical difficulties. In- depth analysis of the principles and characteristics of small hole EDM,on the D703 F small hole EDM machine,experiments show that using PAAS in the appropriate concentration as working fluid can increase processing speed and decrease relative electrode wear rate,but with the deeper holes,hole processing environment deteriorates,cooling difficulties,PAAS produces carbonization that impedes the normal processing. Using PAAS as working fluid at the same time workpiece half infusion,can be a good heat dissipation in the processing of the workpiece,mitigate PAAS working fluid carbonization,achieve great depth to diameter ratio holes in high- speed machining.

关 键 词：小孔加工 深径比 半浸液加工 分散剂 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]