The middle wire is also a kind of wire EDM machine. The working principle is to use the continuously moving molybdenum wire (called the electrode wire) as the electrode to perform pulse spark discharge on the workpiece to remove metal and cut into shape. The quality of the processed workpiece is between the two, so it is called the middle wire. To be precise: the middle wire is an upgraded product of the fast wire. It can be understood as: the fast wire that can be cut many times, but its processing and cutting speed is not faster than the fast wire. The wire is slow, but it is higher than the fast wire. Only in the process of multiple cutting, the cutting speed can be reduced to achieve the cutting effect. At this time, the average efficiency is calculated, not the highest efficiency, and the processing quality tends to be slow. Silk. The wire running speed is automatically controlled by the system and can be adjusted as needed.

Now the wire cutting market is full of all kinds of wire cutting products, the price ranges from more than 20,000 to more than 100,000; many low-end manufacturers change the name of the product, and the price can vary by tens of thousands or even more, which is extremely unreasonable. Reasonable, as far as the same manufacturer is concerned, the cost of wire-moving in production and fast-moving wire is only increased by a few thousand at most. The original casting is still the same casting, and the original guide screw is still the same grade. There has not been much change, but since we are talking about the thread, it is still worth exploring in terms of functions and configurations.

In the development of reciprocating wire cutting machine tools in recent years, the application of cutting technology for many times, whether it is machining accuracy or surface roughness, has solved the problem of directionality for the development of China's wire cutting technology. Pushing to a new stage, it is possible to upgrade the reciprocating wire cutting machine with Chinese characteristics to a higher level. However, if these possibilities become a reality, there is still a long way to go. There is still a considerable gap with the slow-moving wire, but for entry-level slow-moving wire, this gap does tend to narrow.

This paper summarizes six common application problems of wire breakage, low processing efficiency, wire marks on the surface, concave belly of the workpiece, wire marks at the feed of the die, and short circuit during the slow-moving wire cutting process, and provides corresponding countermeasures, which are worthy of the factory. Intensive reading and collection of slow silk technicians!

Wire-cutting machine tools are widely used and important. They can ensure good dimensional accuracy in the production and processing of plastic molds and precision multi-station progressive molds, which directly affects the assembly accuracy of molds, the accuracy of parts, and the service life of molds. Wait. Due to the high precision requirements of machining workpieces, if there is a little negligence in the processing process, the workpiece will be scrapped, and it will also have a negative impact on the manufacturing cost and processing cycle of the mold. In the process of programming and operating the slow-moving wire cutting machine tool, combined with years of production practice, in view of the deformation problems and difficulties encountered in the processing process, several processing methods and processing operation plans have been summarized. Cutting machine, machining accuracy is ±0.003mm, 99.9% brass electrode wire is selected, and immersion deionized water cooling.

The cutting speed of WEDM is contradictory to the quality of the machined surface. It is very difficult to obtain a high cutting speed and a good surface quality in one cutting process. Low-speed wire-cut wire EDM (LS-WEDM) has a high level of comprehensive technology, and it does not achieve the process index by one cut, but uses multiple cutting processes, that is, the first cutting uses a larger pulse Energy and current machining to obtain a higher cutting speed, at this time, the quality of the machined surface is not unnecessarily required; for the second and third cutting, the fine cooperation unit and the fine machining standard are used for step-by-step polishing to obtain Ideal machining quality and machining accuracy.