Die is a tool product that has a large amount of use and a wide range of influence in the manufacturing industry. Without cavity molds, die casting molds, casting molds, deep drawing molds, and punching molds, plastic parts, alloy die castings, steel plate parts, and forgings that are widely used and competitively priced cannot be produced. In modern mass production, there are no high-quality molds and there are no high-quality products. It also plays an important role in improving production efficiency and reducing production costs. According to the latest statistical analysis in foreign countries, 75% of rough machining of metal parts, 50% of precision machining, and 90% of plastic parts are completed by mold processing. Therefore, the mold industry is also known as "Crown Industry." Today, mold manufacturing has become an important part of advanced manufacturing technology.
The materials used to make molds are usually a class of difficult-to-machine materials. At present, the domestic mold cavities generally use EDM molding. However, the production efficiency of electrical processing is very low. No matter in terms of mold development speed or mold manufacturing quality, it cannot meet the requirements of modern mass production.
The emergence of high-speed machining technology has opened up a new path for mold manufacturing technology. It is an inevitable trend to speed up mold development and improve mold manufacturing quality by using high-speed machining instead of electrical processing.
The main advantages of high-speed machining are:
Good product quality—High-speed cutting takes high-speed machining at a cutting speed that is about 10 times faster than conventional cutting speed. The amount of swarf of blank material is not fully deformed and is cut off from the workpiece in a moment. The residual stress on the workpiece surface is very small; Most of the heat generated in the cutting process (over 95%) is rapidly taken away by the chips, and the thermal deformation of the workpiece is small. In the high-speed machining process, the spindle of the machine tool operates at an extremely high speed (10000 "80000 r/min), exciting vibrations. The frequency is far away from the natural frequency range of the "machine tool-tool-workpiece" system, and the part machining process is smooth and without impact.Therefore, the parts have high machining precision, good surface quality, and roughness up to Ra 0.6μm or more. The cavity, the surface quality can reach the level of grinding, so many subsequent finishing operations can often be omitted.
High production efficiency - using high-speed machining centers or high-speed milling machines to process molds, it is possible to complete the roughing and finishing of the cavities and the machining of other parts of the mold parts in a single clamping of the workpiece. This is the so-called "one pass" technique (One Pass Machining). ) The cutting speed is high and the efficiency of the machining process itself is several times higher than that of the electric machining. In addition to this, it does not use electrodes, and often does not require subsequent manual grinding and polishing, and it is easy to automate the process. Therefore, the application of high-speed machining technology has greatly increased the speed of mold development.
Prospects:
High-speed machining has high processing precision, good surface quality, and high production efficiency. It has a very good application in the mold industry. The traditional electric processing technology can not match it. It is fully in line with modern manufacturing technology, "high efficiency, high precision and high degree of automation. "The direction of development has broad application prospects.
