Slow wire is EDM wire cutting, but due to the different use environment, ordinary slow wire can not be used in many environments, so special slow wire needs to be used. How to realize the special slow-walking wire, it needs the slow-walking wire processing to realize, the slow-walking wire processing will become more perfect. The following is to introduce the content of slow wire processing, welcome to read!

Slow wire is the use of continuous moving thin metal wire (called electrode wire) as the electrode, pulse spark discharge on the workpiece, corrosion metal, cutting molding. The slow-moving wire is mainly used to process the workpiece with complex shape and small precision. According to the electrode wire material (one is molybdenum wire, the other is copper wire), EDM machine tools are usually divided into two categories: one is slow wire (electrode wire is copper wire). The electrode wire as a low speed one-way movement, the general wire speed is less than 0.2m/s, the accuracy reaches 0.001mm, the surface quality is close to the grinding level. The electrode wire is no longer used after discharge, stable and uniform work, small shaking, good processing quality. And the use of advanced power technology, to achieve high-speed processing, productivity up to 350m2/min.

The slow-moving wire uses the continuous moving fine metal wire as the electrode, that is, the electrode made of the electrode wire, carries on the pulse spark discharge to the workpiece to corrode the metal, and the machining machine tool is cut. In the process of the slow-moving wire, there is loose contact light pressure discharge phenomenon between the on-line electrode and the workpiece. After years of observation and research, it is found that when flexible: When the electrode wire and the workpiece are close to the discharge gap usually considered (such as 8~10μm), no spark discharge will occur. Even when the electrode wire is in contact with the workpiece, the gap can not be seen from the microscope, and the spark is often not seen. Only when the workpiece will the electrode wire top bend and offset to a certain distance (a few microns to tens of microns), the normal spark discharge will occur. At this time, each wire electrode feed 1μm, the discharge gap does not reduce 1μm, but the wire electrode wire to increase a little line tension, and work to increase a bit of lateral pressure, obviously, only the wire electrode wire and the workpiece to maintain a certain slight contact pressure, in order to form spark discharge. At this time, there is a certain extent between the wire electrode wire and the workpiece, when there is a certain degree of friction between the electrode wire and the workpiece, there will be a certain degree of friction between the electrode wire and the workpiece.

Because the slow wire cutting machine adopts the way of wire electrode continuous supply, that is, the wire electrode completes the processing in the process of motion, so even if the wire electrode loss, it can be continuously supplemented, so as to improve the machining accuracy of parts. The surface roughness of the workpiece processed by the slow wire cutter can generally reach Ra=0.8μm or more. The roundness error, linear error and dimensional error of the slow wire cutter are much better than that of the fast wire cutter. Therefore, the slow wire cutter has been widely used in the processing of high-precision parts. In addition to the early days of small and medium-sized companies, large companies such as airlines, automobiles and medical processing plants are also popular.

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