Mould is a tool product with a large amount of use and […]
Mould is a tool product with a large amount of use and wide influence in the manufacturing industry. Without cavity dies, die casting dies, deep drawing dies and stamping dies, widely used and competitively priced plastic parts, alloy die casting parts, steel plate parts and forgings cannot be produced. In modern mass production, without high-level molds, there can be no high-quality products. It also plays an important role in improving production efficiency and reducing production costs. According to the latest foreign statistical analysis, 75% of rough machining of metal parts, 50% of finishing, and 90% of plastic parts are completed with mold processing. Therefore, the mold industry is also called "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, domestic mold cavities are generally formed by electric discharge machining (EDM). However, the production efficiency of electromachining is very low, and it can not meet the requirements of modern mass production in terms of mold development speed and mold manufacturing quality.
The advent of high-speed processing technology has opened up a new road for mold manufacturing technology. It is an inevitable trend to speed up the development of molds and improve the quality of mold manufacturing by replacing high-speed machining with electric processing as much as possible.
The main advantages of high-speed processing are:
Good product quality-high-speed cutting parts are machined at a cutting speed about 10 times higher than the conventional cutting speed. The remaining material is cut off from the workpiece in an instant without sufficient deformation, and the residual stress on the workpiece surface is very small; Most of the heat (more than 95%) generated in the cutting process is quickly taken away by the chips, and the thermal deformation of the workpiece is small. During high-speed machining, the machine tool spindle runs at a very high speed (10000 "80000 r / min), which excites The frequency is far from the natural frequency range of the "machine tool-tool-workpiece" system, and the part processing is smooth and without impact. Therefore, the part has high processing accuracy, good surface quality, and roughness of up to Ra 0.6 μm. After high-speed milling The surface quality of the cavity can reach the level of grinding, so many subsequent finishing operations can often be omitted.
High production efficiency—Machining molds with a high-speed machining center or high-speed milling machine can complete the rough and fine machining of the cavity and the machining of other parts of the mold parts in one clamping, which is called the "One Pass Machining" technology. ), The cutting speed is very high, and the efficiency of the machining process itself is several times higher than that of electric machining. In addition, it does not need to be an electrode, and often does not require subsequent manual grinding and polishing, and it is easy to automate the processing process. Therefore, the application of high-speed processing technology has greatly improved the development speed of molds.
Prospects:
High-speed machining has high processing accuracy, good surface quality, and high production efficiency. The application effect in the mold industry is very good. The traditional electrical processing technology cannot match it. It is fully in line with modern manufacturing technology "high efficiency, high precision and high automation. The development direction has broad application prospects.