硬质合金模具发展回顾-Technical Support-Alloy ring-Tianchang Shengqi Cemented Carbide Material Co., Ltd.

In the past, domestic cemented carbide molds were still in the primary stage. Generally, alloy gears with small and medium modulus were processed by molds. However, because of the deformation and shrinkage during the processing of alloy gears, the precision change rule after shrinkage. Previous domestic research Not deep, Shi Zhaoyao believes that this is one of the important reasons restricting the development of alloy hard molds.

The mold is the key part in the gear injection molding process. Gears are relatively precise parts, and a small deviation may affect the performance of the entire gear. Alloy hard molds look simple, but they are actually complicated. Factors such as gear modulus, helix angle, and hole position determination all affect the design of hard molds. "The problem of precision and life is the most important thing in the research of cemented carbide molds. In the past, domestic efforts in this area were still very limited. ***When visiting some gear factories in recent years, I saw that the problems of cemented carbide molds exceeded It's beyond imagination." Professor Shi said worriedly.

In terms of the essence of the standard, it should be divided into two types: technical standard and product standard. Technical standard is a relatively open standard, but product standard is very difficult to do. It is necessary to consider the experimental standard, precision standard, test device standards, etc. Therefore, the formulation of standards is not done in a day. It must be based on the expansion of the industry and the strong economic strength. When the conditions are ripe, it will be the day when the standards are issued.

Looking at the current situation of hard molds in my country, it can be described as mixed. The joy is that the production of hard molds has a certain foundation, and the general trend of the development of alloy gears will bring more market space for hard molds; the worry is that the level of domestic production of hard molds is still far from the world level. Moreover, under the great development trend of the gear industry, especially the alloy gear industry, the domestic response to market changes is not keen enough, and it is difficult for supporting research to keep up with the market demand.

In the past, there were neither national standards nor ready-made industrial standards for the processing of cemented carbide molds, especially in the aspect of alloy cemented carbide molds. In the past, the most important thing was to establish standards, and industry associations were duty-bound. The "Small Module Gear Working Committee" was established to focus on discussing and solving the problems existing in the production of small module gears. Today, the world's most complete standard for hard molds is the United States, and Chinese hard molds should learn from the standards of the United States and follow To meet the needs of development, gradually establish its own industrial standards and national standards. Specifically, it is to improve the factory standards of some companies that have done well, and combine foreign standards to become my country's industrial standards. In this way, through the standard To regulate the market, will be able to better promote the development of the industry.

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