电火花线切割薄壁尖角类零件磁力变形研究  

Study on the Magnetic Deformation of Thin-Wall and Sharp-Corner Workpiece in WEDM

作　　者：李红丽 马耀峰 陈志[2] LI Hong-li;MA Yao-feng;CHEN Zhi(College of Electromechanical and Vehicle Engineering,Zhengzhou Institute of Technology,He’nan Zhengzhou 450044,China;College of Mechanical and Electrical Engineering,Central South University,Hu’nan Changsha 410084,China)

机构地区：[1]郑州工程技术学院机电与车辆工程学院,河南郑州450044 [2]中南大学机电与工程学院,湖南长沙410084

出　　处：《机械设计与制造》2019年第12期121-123,127,共4页Machinery Design & Manufacture

基　　金：郑州工程技术学院智能制造科技创新团队(CXTD2018K4)

摘　　要：针对电火花线切割加工薄壁尖角类零件(厚度<4mm,角度<10°)容易在尖端处产生一定的磁力变形,开展磁力变形的形成机理和抑制方法研究。首先,开展轮廓观测实验,发现磁性材料的磁力变形与加工方向相同,非磁性材料的磁力变形与加工方向相反。其次,通过电火花线切割加工电磁场分析,揭示薄壁尖角类零件磁力变形的根本原因。随后,设计正交实验,分析加工工艺参数对磁力变形的影响规律,并获得较小磁力变形的工艺参数范围。最后,提出电极丝轨迹补偿方法降低磁力变形,实验结果表明该方法可以将磁力变形降低50%。This paper aims to analyze the problem that it is easily to form magnetic deformation when wire electrical discharge machining(WEDM)produces thin-wall and sharp-corner(h<4mm,angle<10°)workpiece,and the study of forming mechanism and suppression method of magnetic deformation are implemented.Firstly,workpiece profile measurement experiments find that the magnetic deformation direction of magnetic material is the same to cutting path,and the magnetic deformation direction of nonmagnetic material is opposite to cutting path.Additionally,the mechanism of magnetic deformation is revealed through the magnetic field analysis in WEDM.Then,a set of Taguchi experiment is designed to analyze the effects of process parameters on the magnetic deformation and obtain the process parameters for small deformation.Finally,the method of wire path compensation is proposed to reduce magnetic deformation,and the verified experiment data indicates that this method can decrease magnetic deformation by 50%.

关 键 词：电火花线切割 薄壁尖角类零件 磁力变形 电极丝轨迹补偿 

分 类 号：TH16[机械工程—机械制造及自动化]