Wire EDM is by continuously moving thin wire (known as the electrode wire, usually copper and molybdenum wire) as the electrodes, to carry out work on the pulse spark discharge, high temperatures above 600 degrees erosion except for the metal cutting workpiece, a NC machine tools. The principle of EDM machining is seamed a gap exists between the electrode and the workpiece online, continuous discharge of metal removal phenomenon.
Because the low-speed wire cutting machine is to take line electrode for continuous wire way, namely wire electrode in motion in the process of finishing, so even if the occurrence of wire electrode loss, also can continuously be added, so it can improve the machining accuracy of the parts. Walking the wire cutting machine, the machining workpiece surface roughness is usually can reach Ra=0.8 m and above, wait WEDM machine roundness error, linear error and size error are relatively brisk walking thread cutting machine is much better, so in parts processing precision is high, low-speed wire cutting machine has been widely used. In addition to the early cars in small and medium enterprises, such as aviation, medical, factory and other large enterprises are very common.