The medium wire cutting machine belongs to the category of reciprocating high-speed wire cutting electric discharge wire cutting machine, which realizes multiple cutting functions on the high-speed reciprocating wire cutting electric discharge wire cutting machine. The main technical indicators of medium wire and slow wire are: the biggest difference between medium wire and slow wire is their reciprocating motion and repeated use. Although it fully reflects their cost advantages, it also brings the trouble of unpredictable processing conditions.
The intermediate wire walking technology points out that the so-called "intermediate wire walking" speed is not between high and low speeds, but a composite wire walking machine. Its principle is to use high speed (8-12 m/s) wire walking during rough machining and low speed (1-3 m/s) wire walking during precision machining. This wire walking method is relatively stable, less shaking, and reduces material deformation and molybdenum wire loss through multiple cutting processes.
Therefore, it is called "medium wire cutting", and wire electrical discharge machining is achieved by connecting the electrode wire to the pulse power supply. The workpiece layer is connected to the positive electrode of the pulse power supply. After the high-frequency pulse power supply is powered on, when the distance between the workpiece and the electrode wire is less than the discharge distance, the pulse energy ionizes and breaks down the medium (working fluid), forming a discharge channel. After the high-frequency pulse power supply is powered on, when the distance between the workpiece and the electrode wire is less than the discharge distance, the surface of the workpiece melts or even vaporizes, causing the surface of the workpiece to melt and form pits.
Due to the polarity effect in the high temperature zone, the energy distributed between the electrode wire and the workpiece is different, resulting in different surface temperatures between the electrode wire and the workpiece. The melting temperature of the electrode wire is much higher than that of the workpiece material. When the electrode wire leaves the high temperature zone at high speed, the melting temperature of the electrode wire gradually increases, causing a change in the temperature of the electrode wire and the workpiece surface. As a result, the gap between the electrode wire and the workpiece gradually decreases when the electrode wire leaves the high temperature zone at high speed, causing a gap to be gradually cut on the surface of the electrode wire. In fact, it draws on the processing technology of some low-speed wire feeders to achieve multiple processes such as seamless cutting and multi cutting.
It can be seen that after multiple applications of cutting technology, it is very important to evaluate the technical indicators of standard consistency size error and longitudinal section size error above 100mm in a standardized form. During the machining process of the machine tool, a customer asked that when using water-based working fluid for wire cutting, there is rust color on the surface of the workpiece, which will turn black when wiped off. What is the reason? Firstly, this phenomenon is not closely related to the working fluid of the machine tool, as traditional oily emulsified oils also exhibit this phenomenon. Unlike water-based working fluids, the residual color on the surface of the processed workpiece is different, with one being black and viscous. The surface of the workpiece using water-based working fluid is yellow, with color residues such as rust. At this point, simply wipe gently with BMW cleaner to clean it thoroughly. These two different colored residues are mainly caused by different raw materials in emulsified oil and water-based working fluid.