Forming technology for titanium alloy variable-curvature rotation body structure sheet metal part

Abstract

The invention discloses a forming technology for a titanium alloy variable-curvature rotation body structure sheet metal part and belongs to the technical field of variable-curvature rotation body structure forming. The problems that in the forming process of an existing titanium alloy variable-curvature rotation body structure sheet metal part, plate stress is not uniform, and consequently, crumpling, thinning and plate cracking are likely to happen at the variable-change position of a part or a die is stuck and cannot be opened is solved. Male and female dies are used for conducting hot pressing on two plates, and the shape of each plate is the shape of each portion of a part after the part divided into two portions symmetrically in the axial direction and each portion is unfolded. In addition, rib plates are symmetrically added on a transition area of a first straight cylinder section and a conical cylinder section on each plate, wherein positioning holes are formed in the two end portions of each plate, positioning pins are integrally machined at the front end portion and the rear end portion of the male die correspondingly, calendaring ribs are integrally machined on the two sides of the transition area of the first straight cylinder section and the conical cylinder section on the male die correspondingly, and before hot pressing, the plate is correspondingly inserted on the two positioning pins through the two positioning holes.

Description

technical field [0001] The invention relates to a forming process of a titanium alloy variable-curvature rotary structure sheet metal part, and belongs to the technical field of variable-curvature rotary structure forming. Background technique [0002] The use of titanium alloys in aviation products is increasing year by year, and the proportion of titanium alloy sheet metal parts in engines is also relatively large, and most of the sheet metal parts that can be applied to aeroengines are rotary parts, and the roundness requirements are also high. higher, such as image 3 Shown is a typical representative of titanium alloy variable curvature rotary structure sheet metal parts, this part is used in the anti-icing device of a certain type of aeroengine, including the first straight cylinder section 100, the first transition fillet 101 (≥ R100), the cone The roundness of the cylindrical section 102, the second transition fillet 103 (≥R100), and the second straight cylindrical s...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem of uneven stress on the sheet metal during the forming process of the existing titanium alloy variable curvature rotary body structure, which causes the parts to easily wrinkle, thin, crack the sheet metal or cause the mold to be stuck at the variable diameter. The problem that the mold cannot be opened, and then a titanium alloy variable curvature rotary structure sheet metal forming process is provided

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