Forming method of thin-wall metal component and mold for forming

Abstract

The invention provides a forming method of a thin-wall metal component and a mold for forming. According to the forming method, a sheet is formed into a metal member in a preset process by using a mold with a concave part matched with a specified shape. The mold comprises a supporting frame, a bearing part arranged on the supporting frame, a sunken part formed by inwards sinking from the surface, away from the supporting frame, of the bearing part and a fixing assembly used for fixedly arranging the sheet on the bearing part, wherein the fixing assembly comprises a blank holder, and the end, away from the sunken part, of the blank holder is fixedly connected with the bearing part. The bearing part and the blank holder jointly define a containing space used for containing the edge of the sheet, the sheet is arranged in a forming device after being mounted on a mold and sealed, and the metal member is obtained through a heating procedure, a deep drawing deformation procedure and a creep deformation correction procedure. According to the method provided by the embodiment of the invention, the thin-wall metal member can be integrally formed, and the use reliability of the metal member is improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of thin-walled metal components, in particular to a forming method of thin-walled metal components and a mold for forming. Background technique [0002] Large storage tanks are mainly welded and connected sequentially by tank bottom, connecting ring and cylinder section, and are widely used in aerospace, petrochemical and other fields, so their safety and reliability requirements are extremely high. The bottom of the tank is a key component in the tank structure, usually spherical or ellipsoidal, and the manufacturing process commonly used at present is to form multiple melon petal units first, and then stitch and weld the multiple melon petal units to form a whole tank bottom. However, the forming accuracy of melon petals is poor, requiring manual repair, and there is a large residual stress after tailor welding, and the mechanical properties of the weld are weak, which is often an area prone...

AI Technical Summary

Problems solved by technology

However, the forming accuracy of the melon petals is poor and requires manual repair. There is a large residual stress after tailor welding, and the mechanical properties of the weld are weak. In actual use, it is often an area prone to cracking problems.

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