磁场辅助慢走丝线切割加工参数对切缝宽度的影响  

Influence of processing parameters on cutting width in WEDM with magnetic field assisted technique

作　　者：张艳明[1] 黄浩[1] 张国军[1,2] 黄禹[1] 

机构地区：[1]华中科技大学机械科学与工程学院,武汉湖北430074 [2]广东省制造装备数字化重点实验室,广东东莞523000

出　　处：《制造技术与机床》2017年第3期94-98,共5页Manufacturing Technology & Machine Tool

基　　金：国家自然科学基金项目面上项目(51175207);广东省省级科技科技计划项目(2013B091602001)

摘　　要：慢走丝电火花线切割加工中切缝宽度是其重要的工艺指标,稳定且可控的切缝宽度不仅可提高尺寸精度,还可以在一定程度上改善加工条件,满足加工需求。在磁场辅助线切割加工中,进行磁场与各电加工参数对切缝宽度的影响研究,以Al6061合金为实验对象,以磁场强度、脉冲宽度、脉冲间隙、伺服电压和走丝速度为工艺参数,以切缝宽度(Kerf)为工艺目标,设计田口实验,运用主效应分析分析不同磁场方向下各参数对切缝宽度的影响;建立不同磁场方向下的广义回归模型对切缝宽度进行预测,结果显示各广义回归模型预测平均相对误差均小于10%,表明预测模型准确可靠,对实际生产中控制切缝宽度大小有一定的参考价值。Cutting width（ Kerf） is an important process indicator in LS-WEDM（ low speed wire electrical discharge machining）,stable and controllable cutting width can not only improve the dimensional accuracy,but also improve working conditions to meet the processing needs in some degree. In the magnetic field assistant WEDM,the impact of research on the cutting width affected by the magnetic field and the electric machining parameters is carried out. Taking Al6061 alloy as experimental subjects,the magnetic field intensity,pulse-on time,pulse-off time,servo voltage and wire speed as test parameters,cutting width as the process target,and design Taguchi experiment,then using the main effect analysis to analyze the impact of various parameters on the cutting width under different magnetic field; generalized regression models are established under different magnetic field direction to predict cutting width,and results show that predict the average relative error of prediction for generalized regression models are less than 10%,which indicate that the prediction models are accurate and reliable and have a certain reference value for the actual production cutting width control.

关 键 词：慢走丝线切割 磁场 复合加工 切缝宽度 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]