Forming method of super large size titanium alloy U-shaped section

By optimizing the layout of the tracked heating equipment and bending machine, and the heat treatment process of pressing and straightening steel plates in a large trolley furnace, the problems of temperature drop cracking and uneven springback in ultra-large titanium alloy U-shaped profiles have been solved, achieving efficient and low-cost forming of ultra-large titanium alloy U-shaped profiles suitable for aerospace and new energy vehicles.

CN122583904APending Publication Date: 2026-08-18XIAN WESTWOOD SANCHUAN INTELLIGENT MFG CO LTD
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Patent Information

Application Number
CN202610960794.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-30
Publication Date
2026-08-18

AI Technical Summary

Technical Problem

Existing technologies are difficult to effectively form ultra-large titanium alloy U-shaped profiles, especially in terms of controlling cracking and springback caused by temperature drop. Traditional processes and equipment require large investments and are costly, making it difficult to meet the needs of aerospace and new energy vehicle industries.

Method used

By optimizing the layout of the tracked heating equipment and bending machine, an L-shaped rapid transfer path is constructed. Combined with the large bogie furnace steel plate pressing and shaping heat treatment process, the temperature stability and uniform shaping of titanium alloy plates are achieved. Multiple bending and heat treatment processes are used to control springback and improve forming accuracy.

Benefits of technology

We have successfully produced ultra-large titanium alloy U-shaped profiles with a base plate cross-section width of 200mm to 500mm, a plate thickness of 5mm to 30mm, and a length of 6m to 15m. This has solved the problems of temperature drop cracking and uneven springback, improved forming accuracy and material utilization, and reduced equipment investment.

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Abstract

This invention discloses a method for forming ultra-large titanium alloy U-shaped profiles, comprising: 1. Initial heating of titanium alloy sheet using a tracked heating device; 2. Rapid transfer and first bending of the titanium alloy sheet under heat preservation conditions; 3. Second heating and bending of the L-shaped single-sided bent part; 4. Milling the edges of the U-shaped double-sided bent part; 5. Performing steel plate pressing and shaping heat treatment on the milled U-shaped double-sided bent part; 6. Performing surface treatment on the heat-treated U-shaped double-sided bent part to remove surface oxide scale, thereby obtaining the finished titanium alloy U-shaped profile. This invention optimizes the layout of the tracked heating device and bending machine, constructing an L-shaped rapid transfer path, thus solving the cracking problem caused by temperature drop in ultra-large titanium alloy sheet and ensuring the temperature stability of the titanium alloy sheet during bending; the large bogie furnace steel plate pressing and shaping heat treatment process improves the uniformity of the U-shaped double-sided bent part's shaping.
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