With the continuous reform and innovation of mold technology, although there has been a great progress, it seems that it is difficult to solve the problem of mold deformation. Everyone can maximize the service life of mold deformation. So why is the mold deformed? What factors affect the deformation of the mold? Let's take a look at the simple analysis of Haichuang Mould Technology Xiaobian.
The factors of mold deformation are not single. It is known that the precision mold will be deformed to a certain extent, resulting in various problems in the produced products. The effect of the mold geometry on the heat treatment deformation actually still works through thermal stress and tissue stress. Since the shape of the mold is various, it is still difficult to summarize the exact deformation law. The main considerations are: geometry, mold materials, heat treatment, etc.
The factors of mold deformation are mostly due to heat treatment, such as the speed of treatment, the temperature of heating, and the like. For symmetrical molds, the deformation tendency of the cavity can be considered according to the cavity size, outer dimensions and height. When the wall of the mold is thin and the height is small, it is easier to harden. At this time, the tissue stress may play a leading role, and therefore, the cavity tends to expand. On the other hand, if the wall thickness and height are large, it is not easy to be hardened. At this time, thermal stress may play a leading role, and therefore, the cavity tends to shrink. What is said here is the general trend. In the production practice, it is necessary to consider the specific shape of the part, the steel type used and the heat treatment process, etc., and continue to summarize the experience through practice. Due to the actual production, the outer dimensions of the mold are often not the main working size, and can be corrected by grinding after deformation, so the above analysis is mainly the deformation trend of the cavity. For the deformation of the asymmetric mold, it is also the result of the combined action of thermal stress and tissue stress. For example, for a thin-walled thin-walled mold, since the mold wall is thin, the internal and external temperature difference during quenching is small, and thus the thermal stress is small; but it is easy to be hardened and the tissue stress is large, so the deformation tends to expand the cavity. In order to reduce the deformation of the mold, the heat treatment department should work together with the mold design department to improve the mold design, such as avoiding the mold structure with a large difference in section size, the shape of the mold to achieve symmetry, and the complex structure of the mold.
For the process of mold deformation heat treatment, Haichuang Mould Technology carries out high-efficiency treatment from different angles of various factors, from design and development to processing, interlocking, and from the perspective of process holes. Willing to bring more quality to more customers.
Weihai Haichuang Mould Technology Co., Ltd. invites cooperation.
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