Hardware Knowledge Together: An Overview Of Mold High Speed Machining Technology

In modern Mold Production, with the degree of the plastic parts of the beautiful and functional requirements higher and higher and plastic parts are designed to be more complex internal structure, the mold shape design are becoming increasingly complex and ever-increasing proportion of free-form surface, the corresponding mold structure is also designed to be more complex. All of the mold process put a higher demand, not only to ensure the manufacture of high precision and surface quality, but also to the pursuit of processing of the surface appearance. With high-speed machining technology continued to deepen, especially in the processing Machine tool , CNC systems, tool systems, CAD / CAM software and related technology continues to develop, driven by high-speed machining technology has been increasingly applied to the mold cavity of the processing and manufacturing.

CNC high speed machining in mold making, as one of the most important advanced manufacturing technology, is a highly efficient, high quality, low power in an advanced manufacturing technology. Compared with the traditional cutting, the cutting speed, feed rate has been greatly improved, and the cutting mechanism is not the same. High-speed cutting to cutting essential leap took place, the unit power of the metal removal rate increased by 30% to 40%, 30% lower cutting forces, cutting tool life increased by 70%, to remain in large parts of the cutting heat lower rate, low cutting vibration almost disappeared. With the increase in cutting speed, rough material removal rate per unit time increases, the cutting time is reduced, and processing efficiency, and thereby reduced the manufacturing cycle and improve the market competitiveness of products. At the same time, high-speed processing of small fast-forward to reduce cutting force, chip, high-speed discharge to reduce the workpiece deformation of the cutting force and thermal stress, improve poor rigidity and the possibility of cutting thin-walled parts. As the cutting force reduction, increase speed to make the system work cutting away from the machine’s low frequency natural frequency, while the workpiece surface roughness on the most sensitive to low frequencies, thereby reducing the surface roughness. In the high-hardened steel mold (HRC45 ~ HRC65) machining process can be replaced by high-speed cutting and grinding EDM polishing processes, thus avoiding time-consuming electrode manufacturing and processing power, significantly reduce the fitter’s amount of grinding and polishing. For some markets a growing need for thin-walled mold parts, high-speed milling can be successfully completed, and in high-speed CNC machining center, milling, die in a single setup to complete multi-step process.

High speed machining of mold processing technology had a tremendous impact, changing the traditional mold used “annealing heat treatment milling grinding” or ” EDM grinding, polishing,” and other complex and lengthy process even be used alternative to the original high-speed machining of all processes. High-speed machining techniques can be applied to the direct processing of hardened mold cavity (especially semi-finishing and finishing), the electrode in EDM machining, manufacturing, rapid sample also widely used. Mass production practice shows that the application of high-speed die cutting technology can save about 80% of follow-up processing of manual grinding time, saving processing costs nearly 30% of the cost of the mold surface machining accuracy up to 1m, tool cutting efficiency can be increased by 1.

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