Talking about the development trend of saw blade electric discharge machine The core of machining mainly manifests in the requirements for scale accuracy, contouring accuracy and surface quality. After adopting some advanced processing skills, it can achieve mirror surface processing and can successfully complete EDM processing of high-precision mold parts such as miniature connectors, IC plastic packaging, mobile phones, and CD cases. Therefore, the EDM machine promotes the further development of the existing CNC machining skills, and continuously improves the mold machining accuracy.
1. The material of the workpiece to be processed in EDM machining must be dense, the isotropy should be good, the surface hardness and elastic modulus should be constant and consistent, and the processability should be better. It should not exceed 0.1%.
2. The selected ultra-fine processing technology must be matched with the processed data. For example, non-ferrous metal materials (such as copper and aluminum alloys) should be turned or milled with a single-point diamond tool; ferrous metal materials (such as steel) should be selected by grinding, grinding, and polishing processes, otherwise the expected Processing effect.
3. High-speed and high-power high-speed machining are the development direction. High-speed milling has shown great advantages in mold processing. In order to adapt to the processing of the mold cavity surface, the radius of the tool should be smaller than the minimum circumferential radius of the cavity surface to avoid "interference" between the tool and the workpiece during processing. Due to the small diameter of the tool, the spindle speed is required to be very high. The spindle speed of foreign high-speed processing machine tools has reached 40,000 ~ 100000r / min, and the rapid feed speed can reach 30,000 ~ 60000min. The rough and fine machining of the cavity and other parts of the mold parts are often completed in a single clamping of the workpiece, so the spindle power is large. The spindle power of medium-scale mold milling machines and machining centers is often 10 ~ 40kW, some even higher.
4, with a nanometer (1nm ~ 10nm) incremental feed machine and resolution better than 0.1nm measuring equipment, such as laser interferometer, scanning tunneling microscope and atomic force microscope.
