Press machine body welding deformation eliminating method based on residual stress quantitative analysis

A residual stress and welding deformation technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems affecting the quality of the machine body, shorten the welding cycle, and deform the machine body, so as to improve the welding efficiency and optimize the welding path. , the effect of reducing the impact

Inactive Publication Date: 2013-09-04
GUANGDONG UNIV OF TECH
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Problems solved by technology

Although these methods can reduce the deformation of the press fuselage after welding, they can only be analyzed qualitatively based on the deformation after welding, and they have not solved the deformation of the fuselage in essence or during the welding process, which affects the quality of the fuselage. Improvement and shortening of welding cycle

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  • Press machine body welding deformation eliminating method based on residual stress quantitative analysis

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Embodiment

[0023] The flow chart of the present invention is as figure 1 As shown, the method for eliminating the welding deformation of the press fuselage based on the quantitative analysis of residual stress of the present invention includes the following steps:

[0024] 1) Determine the reasonable welding process conditions such as groove form and welding process parameters, and the initial welding path from inside to outside. Welding process parameters include current, voltage, number of welding layers, number of passes, etc.;

[0025] 2) The initial model of the fuselage structure is divided into unit mesh nodes, and the numerical simulation analysis of the welding process is carried out;

[0026] 3) Obtain the residual stress and the deformation caused by each element node position of each weld;

[0027] 4) Correct the original welding path of the fuselage components after multiplying the deformation caused by the node residual stress by a displacement relaxation coefficient less ...

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Abstract

The invention discloses a press machine body welding deformation eliminating method based on residual stress quantitative analysis. The method includes the following steps: (1) determining a primary welding path, (2) performing numerical simulating analysis of the welding process on the structure of a machine body, (3) acquiring the residual stress of each unit node position of each welding seam and the deformation caused by the residual stress, (4) performing correction processing on an original welding path of a component of the machine body, (5) performing numerical simulation of the welding process according to the corrected path, (6) acquiring the welding residual stress after the path is corrected and the shape after the deformation, and making comparison with the initial path, (7) detecting whether the residual stress generated after the path is corrected and the welding deformation meet requirements of welding accuracy of the machine body, (8) if the accuracy requirements are met, designing the welding path of the press machine body, and (9) if the accuracy requirements are not met, continuing to perform the welding path processing and the numerical simulation until the accuracy requirements are met. The press machine body welding deformation eliminating method based on the residual stress quantitative analysis can reduce the effect on machine body quality caused by welding deformation, achieve optimization of the welding path and promote welding accuracy.

Description

technical field [0001] The invention is a method for eliminating welding deformation of a press fuselage based on quantitative analysis of residual stress, and belongs to an innovative technology of a method for eliminating welding deformation of a press fuselage based on quantitative analysis of residual stress. Background technique [0002] Presses are one of the most important mechanical equipment. Widely used in the processing of industries such as automobiles, aerospace, wind power generation, communications and home appliances. The technical level, production capacity and automation degree of the press directly affect the development and technological progress of my country's industry, agriculture, national defense, aerospace and other industries, and affect the modernization process of our country. [0003] The press body is one of the most critical parts of the press to withstand the full working load. The fuselage plays a decisive role in the precision of the pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02
Inventor 肖小亭胡浩孙友松章争荣高向东程永奇张鹏
Owner GUANGDONG UNIV OF TECH
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