Forming method and composite stamping die for a three-way half-pipe part

Abstract

The invention provides a punching forming method of a tee joint half-tube part and a die. The punching die comprises a lower die body, an upper die body and a pressing block, wherein the lower die body is provided with a concave face, a receding groove, a guide column and an ejection rod through hole, the pressing block corresponds to the receding groove in shape, the pressing block is provided with a first guide hole corresponding to the guide column, the upper die body is provided with a convex face corresponding to the concave face, the convex face is provided with a second guide hole corresponding to the guide column, an unfolded rough material is arranged between the convex face of the upper die body and the upper surface of the pressing block, and the part is formed after the upper die body and the pressing block press the rough material and die closing is carried out.

Description

technical field [0001] The application relates to a sheet metal part forming technology, especially suitable for the forming of aluminum alloy plate parts, specifically a stamping forming method and composite stamping die for special-shaped three-way half-pipe parts. Background technique [0002] In the field of aircraft parts manufacturing, high surface quality and high-efficiency one-time forming of tee pipes has always been a major problem in production: especially it is very difficult to form large-diameter special-shaped tee pipes made of aluminum alloy plates with poor ductility and low strength. Since the problem of wrinkling in the forming of parts has not been effectively solved for a long time, this type of parts has been formed by the drop pressure method; this method fills a large amount of rubber in the die, so that the material in the central wrinkled area is discharged outwards to reduce wrinkling. Wrinkles, using the progressive forming method of beating and ...

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the poor ductility and low strength of the aluminum alloy material, the lugs on the supplementary surface are easily broken due to insufficient strength, and cannot achieve the effect of eliminating wrinkles. Strong resistance to tensile fracture

[0005] 2. Since the blank holder presses and expands the wool material, it limits the free replenishment and transfer of the edge material to the thinned area, and cannot give full play to the ductility of the material, which may easily lead to forming cracks

[0006] 3. This method has very strict requirements on the shape of the wool material and the matching of the mold structure. It is only suitable for tee pipes made of steel parts with regular shapes, and has poor versatility.

Images