best hp graphite electrodes
150mm graphite electrodebest hp graphite electrodes High-speed machining strategy and machining parameter optimization selection principle
Graphite has high high temperature strength, low thermal expansion coefficient, good workability and good thermal and electrical conductivity, so best hp graphite electrodes are widely used in metallurgy, electric furnace, electric discharge machining and other fields. In terms of EDM, the development of new hp graphite electrodes and its processing technology has expanded the application range of EDM and improved its performance.
Compared with copper electrodes, hp graphite electrode has the advantages of low electrode consumption, fast processing speed, good mechanical processing performance, high processing accuracy, small thermal deformation, light weight, easy surface treatment, high temperature resistance, high processing temperature, and electrode bonding. .
Although graphite is a very easy-to-cut material, the graphite material used as an EDM electrode must have sufficient strength so as not to be damaged during operation and EDM processing. At the same time, the electrode shape (thin wall, small rounded corners) , Sharp changes), etc. also put forward higher requirements on the grain size and strength of the best graphite electrodes, which causes the graphite workpieces to be easily broken during the processing and the tools are easy to wear. Therefore, how to prevent the workpiece from breaking, improve the surface processing quality, and reduce the cost of processing tools has become an important issue in the processing of the best graphite electrode.
Usually conventional turning, milling, and grinding methods can meet the needs of processing simple-shaped electrodes, but in recent years, the requirements for the complexity of electrode geometry have continued to increase. The high processing surface quality and high processing accuracy of high-speed processing make the high-speed processing of best hp graphite electrodes a hot spot in mold EDM processing. Many manufacturers have launched graphite high-speed processing centers. For example, 64 CNC high-speed graphite milling machines, RFM series machine tools, etc., the spindle speed is usually ~, the feed speed can reach above, the processing wall thickness is less than 1mm, and the minimum fillet radius is less than 0.2mm.
Because EDM best hp graphite electrodes high-speed machining is still a new process, the processing performance of different graphite materials is also different, for the best hp graphite electrodes high-speed machining of the workpiece collapse, tool wear, processing strategy and other issues , It is rarely mentioned in domestic literature. This article introduces the research results of Japan, Germany, etc. in the machining of high-performance best hp graphite electrodes, including the cutting mechanism of best hp graphite electrodes, cutting temperature, tool wear, chip processing, and other basic theories, as well as best hp graphite electrodes High-speed processing strategy, processing parameter selection, etc.