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Electro-beam welding joint melting-coagulation area shape factor modeling and solving method

A technology of electron beam welding and form factor, which is used in electrical digital data processing, special data processing applications, instruments, etc., and can solve problems such as weak theoretical foundation of the model and no consideration of complex physical processes.

Inactive Publication Date: 2008-12-31
BEIJING AVIATION MFG ENG INST CHINA AVIATION NO 1 GRP
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  • Application Information

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Problems solved by technology

At present, the number of factors considered in the research is small, and the complex physical process is not considered, and the method is straightforward; but the theoretical foundation of the model is weak, and in-depth theoretical research is needed to improve the physical connotation of the mathematical model

Method used

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  • Electro-beam welding joint melting-coagulation area shape factor modeling and solving method
  • Electro-beam welding joint melting-coagulation area shape factor modeling and solving method
  • Electro-beam welding joint melting-coagulation area shape factor modeling and solving method

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Effect test

Embodiment 1

[0077] 1. Electron beam welded joint test piece

[0078] Electron beam welding of TC4 titanium alloy test plate with a thickness of 20mm and a size of 200mm×180mm:

[0079] u a - Accelerating voltage, I b - Beam I f -focus current V-welding speed, H-distance from the gun to the test piece

[0080] Parameter 1: U a =150kV, I b =48mA, I f =342mA, V=800mm / min, H=251mm, vacuum 6×10 -3 Pa

[0081] Parameter 2: U a =150kV, I b =56mA, I f =356mA, V=600mm / min, H=251mm, vacuum 8×10 -3 Pa

[0082] Parameter 3: U a =90kV, I b =61mA, I f =1675mA, V=600mm / min, H=370mm, vacuum 3.2×10 -4 Pa

[0083] Parameter 4: U a =150kV, I b =29mA, I f =342mA, V=200mm / min, H=251mm, vacuum 4×10 -3 Pa

[0084] Parameter 5: U a =90kV,I b =54mA,I f =1670mA, V=600mm / min, H=370mm, vacuum 3.0×10 -4 Pa

[0085] Parameter 6: U a =90kV,I b =97mA, I f =1654mA, V=600mm / min, H=370mm, vacuum 3.6×10 -4 Pa

[0086] Parameter 7: U a =90kV, I b=92mA, I f =1685mA, V=600mm / min, H=370mm, vac...

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Abstract

The invention belongs to a melting-zone shape-factor model solving method based on high-energy density beam welding joint mechanical properties, which is suitable for the electron beam welding technique of various metals. The invention takes the traditional thermodynamics as a base and starts from the theory of electron beam welding to realize parameterized reproduction of the melting-zone shape by abstracting the shape features of the joint melting-zone and to get a qualutative model of the melting-zone shape-factor in virtue of temperature field analysis and dimensional analysis, i.e. to solve the mathematical model of the melting-zone shape-factor by numerical solution. With the strong support of mathematical and thermodynamics basic theories, the theory base of the established model is good and can easily explain and elaborate the physical theory of the shape-factor mathematical model. The solution of the melting-zone shape-factor mathematical model changes the prior state that the welding mainly depends on experiences, and is good for technicians to regulate processes and design proposals; the model fully takes impacts of various factors into account so as to reduce the process test times.

Description

technical field [0001] The invention belongs to a method for solving a fusion zone shape factor model based on the mechanical properties of high-energy beam welding joints, and is suitable for electron beam welding techniques of various metal materials. Background technique [0002] At present, the current status of research on the morphology and shape characteristics of high-energy beam welding seams includes: (1) Simple mathematical statistical methods to reproduce the shape and contour of weld seams. For example, the software of weld cross-section shape image developed by Chen Jimin in China can fit the contour curve of the weld and give the equation of the fitting curve (Chen Jimin, Xiao Rongshi, Zuo Tiechuan. Curve fitting of weld cross-section shape Processing technology [J]. Engineering design CAD and intelligent building, 1999, 5: 35 ~ 37). (2) Numerical calculation to predict the weld morphology. Tang Tiexuan, Jiang Xingwei et al. modeled the temperature field of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 付鹏飞王亚军关永军卢志军
Owner BEIJING AVIATION MFG ENG INST CHINA AVIATION NO 1 GRP
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