The advantages of high-speed cutting technology for machining molds

As the main basic technology of manufacturing technology, CNC machining has made great progress in recent years with the development of manufacturing technology. It has entered the development of high-speed cutting, development of new cutting processes and processing methods, and provision of complete sets of technology. A new stage of development. It is an important industrial sector in the manufacturing industry, such as the automotive industry, aerospace industry, energy industry, military industry and emerging mold industry, electronics industry and other major processing technologies, and is also an important factor in the rapid development of these industrial sectors. Therefore, the United States, Germany, Japan and other countries with developed manufacturing maintain a rapid development momentum. As a necessary supporting equipment for CNC machine tools, metal cutting machine tools have entered the development stage of “CNC tools” driven by CNC machining technology, and have shown high efficiency, high precision, high reliability and specialization. "High one special" new features. Luo Baihui, CEO of Mould Network and Expert Committee of Shenzhen Mould Technology Society, believes that the new cutting technology, such as dry cutting and hard cutting, which is represented by high-speed cutting, has shown many advantages and strong vitality, and has become a manufacturing technology to improve processing efficiency and quality. The main way to reduce costs.

Hard cutting is an application field of high-speed cutting technology, which is to use hardened parts with single-edged or multi-blade tools. It has higher efficiency, better flexibility, simple process and less investment than traditional grinding. It has been used in some applications. The field produces better results. In the automotive industry, the cbn tool is used to process the inner hole of 20crmo5 hardened gear (60hrc) instead of grinding, and the surface roughness can reach 0.22μm, which has become a new process promoted by the domestic and international automotive industry.

The development of new cutting processes such as high-speed cutting to promote the development of manufacturing technology is a new task facing modern cutting technology. Luo Baihui, CEO of Mould Network and Expert Committee of Shenzhen Mould Technology Society believes that modern high-speed cutting is not a local improvement of cutting speed. It requires comprehensive improvement and further innovation in manufacturing technology, including CNC machine tools, tool materials, coatings and tools. With significant advances in technology and other technologies, the cutting speed and feed rate can be doubled, and the overall machining efficiency of the manufacturing industry can be significantly improved. Putting the current high-speed cutting level into practical use, improving the overall cutting efficiency of machining in China by one to two times, and narrowing the gap with industrial developed countries, is the goal and face of professionals engaged in cutting and tooling technology in the new century in China. A major challenge.

In the industrialized countries such as the United States, Germany, and Japan, the mold industry is undergoing a large-scale technological revolution in recent years. This is to gradually replace the electric processing equipment with high-speed cutting machine tools, and to efficiently and precisely process the mold cavity. These machine tools mainly include various high-speed CNC milling machines and machining centers.

At present, in the mold processing and manufacturing process, mainly based on ordinary machining and EDM machining. Ordinary machine tool processing mold cavities are generally roughed, semi-finished and finished before heat treatment, and then ground, polished and polished, time-consuming and laborious. Electric discharge machining is performed after annealing, followed by heat treatment, electric discharge machining, and finally grinding and polishing.

With the acceleration of the upgrading of consumer products, higher and higher requirements are placed on the production efficiency and manufacturing quality of molds. The disadvantages of low production efficiency and unstable quality of EDM molds are gradually exposed. Luo Baihui said that in order to shorten the manufacturing cycle and reduce costs, mold companies must widely adopt advanced cutting technology, and the emergence of high-speed cutting technology representing advanced manufacturing technology meets the requirements and characteristics of modern mold processing.

The advantages of high-speed cutting technology for machining molds are mainly reflected in:

(1) The machining efficiency is greatly improved. Not only the machine speed is high, the feed speed is fast, but the rough finishing can be completed at one time, which greatly improves the production efficiency. Combined with the numerical control technology, the manufacturing cycle of the mold can be shortened by about 40%.

(2) High-speed cutting molds do not need to be electrodes, and do not need subsequent grinding and polishing. It is also easy to automate the processing process and improve the development speed of the mold.

(3) High-speed cutting technology can be used to process hardened steel, and high surface quality can be obtained. The surface roughness is lower than Ra0.6μm, and the processing effect of milling and grinding is obtained, which not only saves a lot of time but also improves Surface quality.

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