Alloy skin forming die and method

Through alloy skin forming dies and stir friction/fluid forming or superplastic/gas quenching forming methods, the problems of low surface accuracy and high cost of alloy skins are solved, and high-precision and low-cost forming of aluminum alloy and aluminum-lithium alloy skins is achieved, which improves the yield and overall performance.

CN114871323BActive Publication Date: 2025-10-17BEIJING HANGXING MACHINERY MFG CO LTD
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Patent Information

Application Number
CN202210590846.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-05-27
Publication Date
2025-10-17
Estimated Expiration
2042-05-27

AI Technical Summary

Technical Problem

Existing technologies suffer from problems such as low surface accuracy, poor integrity, and high cost when manufacturing alloy skins, especially in the processing of aluminum alloy and aluminum-lithium alloy skins.

Method used

Using alloy skin forming molds, including upper and lower molds, and combining friction stir/fluid forming and superplastic/gas quenching forming methods, aluminum alloy and aluminum-lithium alloy skins with large local deformation are prepared through specially designed mold structures and process steps.

Benefits of technology

The process improved the surface accuracy of aluminum alloy skin from ±1mm to ±0.3mm, the wall thickness uniformity from ±20% to ±10%, reduced costs, increased the tensile strength of aluminum-lithium alloy skin by more than 20%, reduced weight by 10%, simplified the process, and increased the yield.

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Abstract

The application relates to an alloy skin forming die and method, and belongs to the technical field of metal plastic working, and solves the problems of low profile precision, poor integrity and high cost of an alloy skin in the prior art. The alloy skin forming die comprises an upper die and a lower die, and further comprises a gas quenching die. The alloy skin forming die provided by the application can be used for aluminum alloy local large deformation skin forming, an aluminum alloy local large deformation skin is prepared through a friction stir processing / fluid forming method, the manufactured aluminum alloy local large deformation skin has high precision and good integrity, and the aluminum alloy local deformation capacity can be improved. The alloy skin forming die provided by the application can also be used for aluminum lithium alloy skin forming, an aluminum lithium alloy skin is prepared through a superplasticity / gas quenching forming method, and finally, the aluminum lithium alloy skin not only has high profile precision, but also has high tensile strength performance, the process flow is simple, the processing cost is low, and the aluminum lithium alloy skin has good integrity and consistency.
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