Weld joint grade evaluation method and system

Abstract

The invention relates to the technical field of welding, in particular to a weld joint grade evaluation method and evaluation system. The weld joint grade evaluation method comprises the following steps: acquiring a strength evaluation result of a weld joint according to a first standard; according to the strength evaluation result, dividing a plurality of stress evaluation areas of the weld jointin combination with a second standard, and superposing all the stress evaluation areas to obtain a polishing area and a non-polishing area of the weld joint; and according to the polishing area and the non-polishing area, determining the polishing state of the weld joint and the corresponding stress bearing grade. According to the method, two different evaluation standards are combined; in the initial scheme design stage of the framework, the stress bearing grade of the weld joint can be accurately and efficiently evaluated, so that the occurrence of human intervention is reduced, and the analysis result of weld joint grade evaluation is prevented from being greatly different due to individual differences between different simulation personnel and design personnel.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a weld grade evaluation method and evaluation system. Background technique [0002] The weld seam refers to the seam formed on the weldment by melting and connecting the electrode and the metal at the seam by using the high temperature of the welding heat source. After the weld metal is cooled, the two weldments are joined together to form a weldment. According to the shape of the weld metal and the mutual position of the weldments, the welds can be divided into butt welds, fillet welds, plug welds and electric riveting. In the process of selecting the welding method of the weldment and the joint form of the weldment, it is necessary to refer to the quality of the welds on different weldments to make corresponding choices. According to the requirements of relevant standards, the weld grade is evaluated through the weld safety grade, weld performance grade and weld inspection g...

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Problems solved by technology

[0003] At present, the welds of the bogie frame and its welded parts of railway vehicles cannot be accurately obtained from the virtual simulation results or bench and line tests in the corresponding standard load or measured load spectrum. Under the stress bearing level, it is impossible to confirm the safety level and performance level of the weld according to the requirements in the British standard EN 15085-3:2007 (Chinese name is rail application-welding of rail vehicles and their components-Part III: design requirements) and inspection level, etc., but can only roughly judge whether each weld in the above-mentioned structure needs to be polished and whether other related technological means need to be adopted based on past experience. The weld lacks the basis for confirmation of the welding form

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