Forming method of special-shaped curved surface structural member

Abstract

The invention relates to a forming method of a special-shaped curved surface structural member, belongs to precision sheet metal machining, and solves the problems that in the prior art, a non-equal-wall-thickness special-shaped curved surface product cannot be formed at a time, the surface quality of the product is poor, and the machining efficiency is low. The forming method comprises the steps that a blank is manufactured; the blank is welded; the welded blank is placed on a forming die, and welding seams correspond to steps of an upper die; and the upper die and an ejecting cylinder are lowered, and one-time forming of the non-equal-wall-thickness special-shaped curved surface structural member is completed. The forming die comprises the upper die and a lower die; an opening is formed in the upper surface of the lower die, and the blank makes contact with the lower surface of the upper die and enters a lower die cavity through the opening; and the steps are arranged on the side surface of the upper die and correspond to non-flush surfaces of the blank with different thicknesses. According to the forming method, one-time forming of the non-equal-wall-thickness special-shaped curved surface structural member is achieved.

Description

technical field [0001] The invention relates to the technical field of precision sheet metal processing, in particular to a forming method of a special-shaped curved surface structural part. Background technique [0002] Aerospace components are becoming more and more complex, and non-uniform wall thickness products are widely used in aerospace vehicles as a typical component. [0003] The cold stamping processing device and processing technology can only process products with equal wall thickness. For products with non-equal wall thickness, they cannot be formed at one time, and only the process of tailor welding after segmental forming can be used. [0004] The process of segmented forming and then tailor welding has the following disadvantages: First, the process of segmented forming and then tailor welding requires manual repair, shape correction, and grinding, and the workload is heavy, resulting in extremely low product processing efficiency. Secondly, there are many ...

AI Technical Summary

Problems solved by technology

[0003]Cold stamping processing equipment and processing technology can only process products with equal wall thickness, and products with non-equal wall thickness cannot be formed at one time, and only tailor-welded after segmental forming can be used craft

[0004] There are the following disadvantages in adopting the process of segmented forming and then tailor welding: First, the process of segmented forming and then tailor welding requires manual repair, shape correction and grinding, and the workload is large , leading to extremely low product processing efficiency

Secondly, there are many welding seams, large welding seam deformation, and cracks are easy to occur in the shape correction, resulting in a low pass rate of the product at one time

Thirdly, the surface quality of the products processed by tailor welding process is poor

Finally, due to the presence of welds, the mechanical properties of the parts will inevitably be reduced

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