铜钨合金工具电极电火花多次切割工艺研究  

Study on multi-cutting process of copper tungsten alloy tool electrode by WEDM

作　　者：李文明[1] 周长武[1] LI Wenming;ZHOU Changwu(Zhonghuan Information College,Tianjin University of Technology,Tianjin 300380,CHN)

机构地区：[1]天津理工大学中环信息学院,天津300380

出　　处：《制造技术与机床》2022年第9期62-68,共7页Manufacturing Technology & Machine Tool

基　　金：天津市教委科研计划项目(2021KJ071)。

摘　　要：铜钨合金工具电极在电火花成形加工中具有极佳的加工性能,电火花线切割多次切割是工具电极制造的重要技术方法。通过响应曲面法研究了第1次切割脉冲宽度、峰值电流、伺服电压对切割速度的影响规律,并优化得到了最大切割速度下的组合工艺参数,在此基础上又进行了不同切割次数对工具电极加工质量影响的研究。研究结果表明:第1次切割脉冲宽度50μs、峰值电流12 A及伺服电压12 V,切割速度最大为25.08 mm2/min。1次切割的尺寸误差在10μm以内,切割表面粗糙度Ra2.582μm;2次切割的尺寸误差在5μm以内,切割表面粗糙度Ra1.177μm;3次切割的尺寸误差在3μm以内,切割表面粗糙度Ra0.732μm。随着切割次数的增加,切割表面沉积的碳元素增多,有助于提高电极的低损耗性能。Copper tungsten alloy tool electrode has excellent processing performance in EDM,and WEDM multiple cutting is an important technical method for tool electrode manufacturing.The influence of the first cutting pulse width,peak current and servo voltage on the cutting speed was studied by response surface method,and the combined process parameters under the maximum cutting speed were optimized.On this basis,the influence of different cutting times on the machining quality of tool electrode was studied.The results showed that when the first cutting pulse width is 50μs,the peak current is 12 A and the servo voltage is 12 V,the maximum cutting speed is 25.08 mm2/min.Moreover,the dimension error of one cutting is less than 10μm and the surface roughness is Ra 2.582μm.The dimension error of secondary cutting is less than 5μm,the surface roughness is Ra 1.177μm.The dimension error of three times cutting is less than 3μm,the surface roughness is Ra 0.732μm.With the increase of cutting times,the carbon deposited on the cutting surface increases,which helps to improve the low loss performance of the electrode.

关 键 词：铜钨合金工具电极 多次切割 切割速度 加工质量 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]