Compared with the traditional stamping process, the advantages of EDM punch are very obvious. The traditional machining technology will have problems below 1 mm, and in the diameter range of 0. 10~3.0mm (down to 10mm in special cases), mechanical perforation will be completely replaced by electric spark perforation. Its advantage is that it greatly saves time and cost, because there will be no tool breakage, tool passivation, tool polishing and other phenomena. EDM can ensure the high precision of the aperture, the verticality and cylindricity of the hole, and there is no burr and offset. Hardened steel can also be machined by EDM. Therefore, the traditional phenomenon of quenching deformation of perforated plates can be avoided. Even materials that are difficult to cut (such as tungsten, titanium, Inconel, nickel-based alloy, stainless steel alloy and molybdenum) can be processed. Hearn EDM machine tool can enter the surface of workpiece at an extremely steep angle and etch unknown holes. The whole process is accurate and controllable, and there is no need to set an accurate drilling depth in advance.
After years of research and development, we have successfully developed a system that can detect the penetration of electrodes and affect the depth and characteristics of EDM through the electronic control unit of machine tools without being affected by electrode loss. Different machining processes will have different effects on the degree of electrode wear, so it is difficult to control the corrosion depth accurately and repeatedly. In addition, the EDM process will also change in the process of electrical corrosion. So even if we continue to advance 2~3mm on the erosion axis, it will be as long as 100mm drilling itself. This will affect the diameter accuracy of the hole and the external dimensions of electrode taper and roundness.
When machining the manhole with large inclination angle on the blade, the penetration identification system can ensure the accurate erosion depth without damaging the back wall immediately behind it. The idea comes from the machining of turbine blades. The penetration identification system consists of hardware and corresponding intelligent software. After identifying electrode penetration, different measures can be implemented according to different requirements of users.
Under other conditions of use (for example, in the manufacture of tools and molds), this penetration identification technology also has many benefits. Equipment operators may not have to worry about electrode wear. He is only responsible for making a reasonable choice between materials, electrode diameters and processing strategies. Other aspects are completed in an instant by the intelligent control system. Production enterprises seek to continuously improve the efficiency, flexibility and rationality of production. Putting into use adaptable production equipment can not only achieve good economic benefits, but also be necessary in the increasingly fierce competition with countries with low manufacturing costs. This is true for large enterprises with complex production equipment, and it is also true for small enterprises with only a single equipment.
The control system of CNC EDM CNC punching machine can be connected with robot or measuring system, visual data acquisition system of parts or bar code scanner. Because of the customer-specific system interface, it can be incorporated into the production line to exchange data with the superior management system and remote maintenance system.
When machining small holes in hard materials, the technology of EDM piercer will play a role. Smooth, accurate, high quality, electrode development is more and more in-depth. In the process of piercing, the software affects the depth dimension and the characteristics of EDM.
Small hole EDM is especially suitable for machining hard materials with electrical conductivity. The drilling depth can reach 700×D. D through the electrode tube EDM forming machine with a diameter of 80μm~3mm (up to 10mm in special cases), and the drilling depth can reach 700mm if the electrode with a diameter of 1.0mm is used. Up to now, the maximum drilling depth in high alloy hard materials is 1500mm. At the other extreme, there is a small hole, about the thickness of a hair. Up to now, the maximum drilling speed achieved on high alloy materials is about 70 mm/min.