Small Details That Need To Be Paid Attention To In Slow-moving Wire Processing!

Slow wire is a kind of processing machine tool that uses continuously moving fine metal wire (called electrode wire) as the electrode to perform pulse spark discharge to remove metal and cut the workpiece. The phenomenon of loose touch light pressure discharge between the wire electrode and the workpiece during slow wire processing. When the flexible electrode wire and the workpiece are close to the commonly thought discharge gap (for example, 8-10μm), no spark discharge occurs. Even when the electrode wire has touched the workpiece and the gap is no longer visible in the microscope, it is often not visible. When it comes to sparks, normal spark discharge occurs only when the workpiece is bent and offset a certain distance (a few microns to tens of microns). At this time, every time the wire electrode feeds 1μm, the discharge gap does not decrease by 1μm, but the electrode wire adds a little inter-wire tension, and the workpiece adds a little lateral pressure. Obviously, as long as the electrode wire and the workpiece maintain a certain light touch pressure Can constitute a spark discharge. Based on this, it is believed that there is some kind of electrochemically produced insulating film medium between the electrode wire and the workpiece.

During the slow-moving wire processing, abnormalities cannot be prevented during the processing, but there are some that can be completely prevented, that is, the details of the processing. Then, which details should be paid attention to in the slow-moving wire processing?

Before processing, it is necessary to check the electrode wire. The tension of the electrode wire also has a great influence on the surface quality of the processed workpiece. For workpieces that require high surface quality, the tension of the electrode wire should be advanced as much as possible under the premise of continuous wire.

High-speed wire cutting machines generally use working fluids made of emulsified oil and water. Spark discharge must be carried out in a liquid medium with a certain insulation function. The insulation function of the working fluid can shrink the discharge channel after breakdown, and then confine the spark discharge in a smaller channel radius, forming an instantaneous and some high temperature to melt and melt. Vaporized metal, after the discharge is over, the discharge vacancy is sensitively restored and becomes an insulating condition. If the insulation function is too low, the operating fluid becomes a conductor and cannot form a spark discharge; if the insulation function is too high, the discharge space is small, chip removal is difficult, and the cutting speed decreases.

Before slow-moving wire processing, different types of emulsions should be selected according to different process conditions. Furthermore, it is necessary to check the conditions related to the coolant, check the liquid volume and the degree of contamination of the working fluid, to ensure that the insulation function, scrubbing function, and cooling function of the working fluid meet the needs.

 Slow wire processing machine tools, the protection of the machine tool is very important, because the high precision and high quality of the processed workpiece is directly based on the high precision of the machine tool. Therefore, we hope that we can pay attention to the parts of precision slow wire processing.