Two-section type molding method of metal plate

Abstract

The invention relates to a two-section type molding method of a metal plate. The method comprise the following steps: providing a molding device comprising a die holder and a sealing die, wherein the sealing die is covered on the die holder to form a die cavity, and the sealing die is provided with a gas inlet channel communicated with the die cavity; placing the metal plate on the die holder to ensure that the circumference edge of the metal plate extends exceeding the circumference edge of the die cavity; pressing the sealing die towards the direction of the die holder and carrying out griping and a first stage of plastic molding on the metal plate; and injecting gas to the die cavity from the gas inlet channel, and pressing the metal plate for a second stage of plastic molding. . The two-section type molding method of the metal plate not only can enhance the production rate and the efficiency, but also can reduce the elastic recovery and residual stress of the metal plate.

Description

technical field [0001] The invention relates to a forming method of a metal plate, in particular to a two-stage forming method of a metal plate. Background technique [0002] The production of traditional thin-shell workpieces is mostly based on casting, stamping and superplastic forming technologies, but the yield and output of cast-molded products are poor, and are also limited by the thickness of the object; general die-casting molding The minimum thickness of the casting is about 0.8mm. Although it is possible to make a casting with a thickness of about 0.6mm, the yield rate is greatly reduced, which does not meet the economic cost and production efficiency. In addition, in addition to the low output and yield of die-casting parts, the process of condensation and shrinkage will seriously affect the surface quality of the finished product, which often needs to be overcome by subsequent surface coating, which not only consumes a lot of labor costs and Coating cost, and it...

AI Technical Summary

Problems solved by technology

In the mold, the metal plate is pressurized and formed by adjusting the gas pressure. Although the pressure of the metal plate can be made uniform by means of ventilation and pressure, it can avoid the stress residue caused by the various forming methods mentioned above. And subsequent surface treatment and other issues; however, its molding speed is quite slow, and it takes a lot of manufacturing time to achieve the predetermined amount of deformation, which is not conducive to mass production, and it really needs to be improved

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