超声辅助浸液式厚不锈钢电火花线切割工艺研究  

Research on Ultrasonic-assisted liquid-immersion WEDM for Thick Stainless Steel

作　　者：周鹏辉 张凯雪 方文卿 曹盛 杨超普 万俊 ZHOU Penghui;ZHANG Kaixue;FANG Wenqing;CAO Sheng;YANG Chaopu;WAN Jun(National Silicon LED Engineering Research Center,Nanchang University,Nanchang 330046,China)

机构地区：[1]南昌大学国家硅基LED工程技术研究中心,江西南昌330046

出　　处：《电加工与模具》2022年第6期61-65,共5页Electromachining & Mould

基　　金：国家自然科学基金项目(61864008)。

摘　　要：为利用现有电火花线切割加工设备切割厚度500 mm的复杂形腔316L不锈钢工件,从外围研究了多个工艺措施。先是利用电火花小孔加工机床的放电位置固定特点,用双踪数字示波器研究了外加钼丝长度与切割能效的关系;再摸索了浸液式和超声清洗相结合的线切割工艺,在工件周围构造精准牢靠的围坝,以形成浸液式切割;后又在围坝上绝缘安装超声振子,用超声清洗辅助排屑。结果表明:从进电块到工件之间的空闲钼丝会显著浪费切割能量,钼丝温升加大了能量消耗;浸液式切割能有效减少短路及断丝次数,超声清洗又能加速排屑,降低工件表面电阻;对外围措施的探索,有助于确定高厚度不锈钢切割的本质问题。In order to cut stainless steel workpieces with complex shaped cavity up to 500 mm thick on the existing WEDM,a variety of measures are studied to facilitate cutting.Firstly,by using the characteristic of fixed discharge position of EDM,the relationship between the length of the molybdenum wire and the cutting energy efficiency is studied by using the dual trace digital oscilloscope.Then explore the process which combining immersion,ultrasonic cleaning and WEDM.That is,construct a accurate and reliable dam around the workpiece to form immersion cutting.At last,Install an ultrasonic vibrator on the dam to use ultrasound to help particle removal.The results show that the molybdenum wire from the feeder block to the surface of the workpiece will significantly waste cutting energy,and its temperature rise will aggravate this consumption.Immersion cutting can effectively reduce the times of short circuit and broken wire,and ultrasonic cleaning can accelerate chip removal,reduce the surface resistance of the workpiece.These measures help to identify the essential problems of thick stainless steel cutting.

关 键 词：电火花线切割 往复走丝 浸液式 超声清洗 

分 类 号：TG663[金属学及工艺—金属切削加工及机床]