Strength theory based welding design method

A technology of design method and welding method, which is applied in the direction of welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of no consideration of residual stress, inaccuracy, difficulty in meeting the strength requirements of welding workpieces, etc., and achieve simple welding debugging process and reduce Stress level, effect of improving load-carrying performance

Active Publication Date: 2014-09-24
SAIC GENERAL MOTORS +1
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Problems solved by technology

[0004] At present, in the welding design process, two-dimensional shell elements are used for the simulation analysis of the weld, which regards the weld structure as a part of the base material, and does not consider the residual stress generated during the welding process.
In addition, the current CAE analysis method can only study and design the length of the weld, and cannot analyze the bearing capacity and fatigue characteristics of the workpiece due to factors such as welding section size and welding sequence.
Therefore, the analysis of the current welding design method is unscientific and inaccurate, and it is easy to make the welding method designed by it difficult to meet the strength requirements of the welded workpiece

Method used

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Embodiment Construction

[0045] The following introduces some of the possible embodiments of the present invention, which are intended to provide a basic understanding of the present invention, but are not intended to identify key or decisive elements of the present invention or limit the scope of protection. It is easy to understand that, according to the technical solution of the present invention, those skilled in the art may propose other alternative implementation manners without changing the essence and spirit of the present invention. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the entirety of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0046] figure 1 Shown is a schematic flowchart of a welding design method based on strength theory according to an embodiment of the present invention. In the present i...

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Abstract

The invention provides a strength theory based welding design method, and belongs to the technical field of welding. The welding design method comprises steps as follows: (1), actual measurement; (2), CAE (computer-aided engineering) analysis on a welding simulation part; (3) CAE analysis on a whole welding workpiece; and (4), improvement of an established welding method for a corresponding welding seam to reduce the maximum stress sigma max till the minimum safety factor N of the welding seam falls into the corresponding safety factor range of the welding seam. The welding design method can pointedly reduce stress levels of some welding seams and improve the safety factor, so that the welding debugging process is simple, and load-carrying property of the welding seams are effectively and integrally improved.

Description

technical field [0001] The invention belongs to the technical field of welding and relates to a welding design method based on strength theory. Background technique [0002] During the welding process, uneven heating makes the temperature of the weld seam and its vicinity very high, while most of the metal far away from the weld seam is not heated, so that the unheated cold metal hinders the weld seam and the metal near the weld seam After cooling, the weld will produce different degrees of shrinkage and internal stress, which is commonly referred to as welding residual stress. When the workpiece formed by welding is working, the welding residual stress and the working load form a composite stress, which directly affects the bearing capacity and fatigue performance of the workpiece. [0003] In order to meet the product quality requirements of the welding workpiece, the actual welding test workpiece can be used for welding debugging to design a relatively reasonable welding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/12
CPCB23K31/12
Inventor 刘拥军赵永昌陈璟朱挺
Owner SAIC GENERAL MOTORS
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