摘  要
 
电火花线切割，其基本工作原理是利用连续移动细金属丝（成为电极丝）作电极，对工件进行脉冲火花放电蚀除金属、切割成型。
本课题研究的是电火花线切割运丝机构的设计。为了避免火花放电总在电极丝的局部位置而被烧断，影响加工质量和生产效率。在加工过程中电极丝沿轴向作走丝运动。丝整齐地绕在丝筒上，形成一个闭合状态，走丝电机带动丝筒转动时，通过导丝轮使丝作轴线运动。电火花线切割加工机床是开关触点受火花放电腐蚀损坏的现象和原因时，发现电火花的瞬时高温可以使局部的金属熔化、氧化而被腐蚀掉，从而开创和发明了电火花加工方法。
 
关键词： 电火花线切割；动丝机构；设计
 

Abstract
 
EDM wire cutting, its basic principle is to use the continuous movement of fine wire (a wire electrode) as electrode, pulse spark discharge in addition to metal corrosion, cutting and shaping of the workpiece.
This research is the design of wire EDM wire cutting mechanism. In order to avoid the spark discharge electrode wire in local position and be broken, affect the processing quality and production efficiency. In the process of electrode wire for wire movement along the axial direction. Wire neatly around the wire cylinder, forming a closed state, wire motor drives the screw barrel rotates, through the guide wire to wire wheel axis movement. Electric spark wire cutting machine is the switch contacts by the phenomena and the causes of corrosion damage of spark discharge, found that the instantaneous high temperature electric spark can melt the metal oxide, local and has been removed by erosion, thus creating and invented the EDM method.
 
Key words ：electric spark line cutting wire mechanism; dynamic design