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Method and device for automatically optimizing electric-arc welding process parameters

A technology for automatic optimization of process parameters, applied in arc welding equipment, manufacturing tools, welding equipment, etc., can solve problems such as observation and testing of changes, achieve the effects of reducing repetitive work, improving work efficiency, and reducing the number of tests

Inactive Publication Date: 2012-10-17
珠海奥邦焊接科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual production process, due to the extremely high temperature, it is almost impossible to observe and test the structural changes of the weld seam and the heat-affected zone, but with the help of computer simulation technology, simulating certain welding process conditions can easily predict The microstructure and performance of the weld seam and the welding heat-affected zone; on the contrary, by pre-determining the microstructure and performance of the weld seam and the welding heat-affected zone, and inverting the welding process conditions to achieve the result, the optimization of the welding process parameters can be realized, but this The technology has not been reported at home and abroad

Method used

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  • Method and device for automatically optimizing electric-arc welding process parameters
  • Method and device for automatically optimizing electric-arc welding process parameters
  • Method and device for automatically optimizing electric-arc welding process parameters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] It is assumed that the database of its optimized arc welding process parameters has not been established, and the requirement is met if there is no martensite in the structure of the fusion zone.

[0052] (1) Firstly, the continuous cooling microstructure transformation diagram of 14MnMoNB steel was established. After searching the database, it was found that the database of its optimized arc welding process parameters had not been established;

[0053] Welding speed (cm / s) 0.427 0.37 0.24 0.152 0.08 0.05 0.03 Initial temperature (°C) 35 150 150 150 150 150 150 Critical plate thickness (cm) 1.173 1.218 1.956 2.458 3.390 4.286 5.534

[0054] (3) Set preliminary arc welding process parameters: U=25 v; I=200 A; c=0.46 ; ;Calculate the critical plate thickness according to the arc welding process parameters, because the plate thickness 25cm>critical plate thickness , it is regarded as a thick plate weldment.

[0055] (4) Ca...

Embodiment 2

[0060] Assuming that 14MnMoNB steel (C=0.15, Si=1.51, P=0.013, S=0.01, Mo=0.54, Nb=0.047, B=0.0018, Cr=0.05, Ni=0.08, Cu=0.02) optimized arc welding has been established For the database of process parameters, the fusion zone structure without martensite meets the requirements.

[0061] (1) Firstly, the continuous cooling microstructure transformation diagram of 14MnMoNB steel was established, and the optimized arc welding process parameters were found through database retrieval;

[0062] (2) Directly read and output the optimized arc welding process parameters, and display them in the form of tables, curves or intelligent reports, and the optimization ends here.

Embodiment 3

[0064] Assuming that 14MnMoNB steel (C=0.15, Si=1.51, P=0.013, S=0.01, Mo=0.54, Nb=0.047, B=0.0018, Cr=0.05, Ni=0.08, Cu=0.02) optimized arc welding has been established For the database of process parameters, the fusion zone structure without martensite meets the requirements.

[0065] (1) Firstly, the continuous cooling microstructure transformation diagram of 14MnMoNB steel was established, and the optimized arc welding process parameters were found through database retrieval;

[0066] (2) Directly read and output the optimized arc welding process parameters, which are used to control the electric welding machine to directly implement automatic welding in the form of signals, and the optimization is over here.

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Abstract

The invention discloses a method and device for automatically optimizing electric-arc welding process parameters. The method comprises the following steps of: simulating welding heat-cycle curves of electric arc welding under different process parameters by utilizing a computer technology, carrying out superimposition with a continuous cooling structural transformation diagram of a welding base material, and predicating corresponding welding seams and the structure of a heat-affected zone till the requirement is met, so that the optimization of the electric-arc welding process parameters is automatically realized. Therefore, the method and device disclosed by the invention has the advantage that the full-scale testing times for obtaining excellent welding seam structures is greatly reduced.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a method and device for optimizing parameters such as preheating temperature, welding voltage, welding current and welding speed in an arc welding process by using a continuous cooling structure transition diagram under welding conditions. Background technique [0002] With the development of modern science and technology and the continuous development of various new materials, welding technology has been widely used in petrochemical, electric power, aerospace, ocean engineering, nuclear power engineering, bridges, ships and various metal structures and other industrial sectors. Welding uses arc heat as the welding heat source, which is the most widely used welding technology. For a long time, in order to obtain the ideal welding structure and ensure the performance of the weldment, the optimization of the arc welding process parameters is mainly explored and determined through ...

Claims

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Application Information

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IPC IPC(8): B23K9/095
Inventor 刘迎春魏华峰方筠捷
Owner 珠海奥邦焊接科技有限公司
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