Processing principle of DK7750Â electric wire cutting
Electric wire cuttingÂ is connected to the negative pole of the pulse power supply through the electrode wire, and the workpiece is connected to the positive pole 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 electric energy ionizes and breaks down the medium (working fluid) to form a discharge channel. Under the action of electric field force, a large number of negatively charged electrons rush to the positive pole at high speed, The positively charged ions rush to the negative electrode. The high temperature generated by ionization melts or even vaporizes the workpiece surface, so that the metal is thrown out with the movement of the electrode wire and the impact of the working fluid, so as to form pits on the workpiece surface. In the high temperature zone, due to the polarity effect, the energy distributed between the electrode wire and the workpiece is different, so the surface temperature of the electrode wire and the workpiece is also different. Moreover, because the melting temperature of the electrode wire is much higher than that of the workpiece material, and the electrode wire leaves the high temperature zone at high speed, the amount of electrode erosion in the high temperature zone is much less than that of the workpiece, This makes a large pit on the surface of the workpiece and a small pit on the surface of the electrode wire. Because the machining process is continuous, the stepper motor is controlled to feed continuously to maintain the gap necessary to maintain the discharge between the electrode wire and the workpiece, so the workpiece is gradually cut out a gap.
Application scope of DK7750Â electric wire cutting
Electric wire cuttingÂ is widely used in electronic industry, communication industry, shipbuilding industry, automobile manufacturing industry, weapon industry, aerospace, high-speed railway and other precision molds, EDM electrodes, precision hardware parts and tough and difficult to process conductive materials. It can cut plane, taper and upper and lower special-shaped workpieces, which greatly expands the processing range.