Ultrasonic vibration auxiliary combustion chamber cap forming springback compensation method and system

Abstract

The invention discloses an ultrasonic vibration assisted combustion chamber cap forming springback compensation method and system, which utilizes finite element analysis simulation software to simulate the stamping forming process of a cap plate and predict the springback amount of the plate before and after ultrasonic vibration is applied. In the forming process, ultrasonic vibration with a certain direction, frequency and amplitude is applied to a plate blank, by adjusting the amplitude and frequency of ultrasonic waves, the springback amount of the plate is gradually decreased and finally converged to a target shape, a springback compensation factor is obtained, the purpose of springback compensation is achieved, and finally the springback of the thin-wall complex structural part is controllable. According to the technical scheme, the rebound compensation factor database based on ultrasonic vibration assistance is established, the rebound amount of different formed parts made of the same material can be accurately obtained, accurate control over mold structure design is achieved, and the mold design efficiency and the qualification rate are improved. The method can be used for stamping forming springback compensation of the aero-engine combustion chamber cap, and accurate control of the forming springback amount of the combustion chamber cap is achieved.

Description

technical field [0001] The invention relates to the technical field of aero-engine sheet metal parts processing, in particular to a method and a system for compensating for forming and rebounding of an ultrasonic vibration-assisted combustion chamber cap. Background technique [0002] Aero-engine combustion chamber cap is one of the key components of aero-engines. It is used in high temperature, high pressure and other environments, and has high requirements on material properties. GH536 superalloy material has high strength, significant work hardening, high deformation resistance, and excellent resistance. Oxidation and stress corrosion cracking resistance, as well as good tissue stability and reliability. The cap is a complex thin-walled revolving body structure, which is difficult to form. As a high-strength alloy, GH536 is prone to springback during the forming process, which in turn affects the dimensional accuracy and performance of ultra-thin-walled components. Durin...

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Problems solved by technology

[0003] For this reason, the present invention provides a method and system for compensating the springback of combustion chamber caps assisted by ultrasonic vibration to solve the problems of springback in the forming of large-scale, thin-walled and complex structural parts of existing aero-engines. Cover stamping forming springback compensation, to achieve precise and controllable springback amount of combustion chamber cover forming

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