Welding reverse deformation calculation method

A calculation method and anti-deformation technology, applied in calculation, design optimization/simulation, special data processing applications, etc.

Inactive Publication Date: 2018-11-13
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the problem that there is no good method for predicting the amount of welding reverse deformation in the prior ar

Method used

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Embodiment Construction

[0022] Below, the structure and working principle of the present invention will be further described in conjunction with the accompanying drawings.

[0023] Such as figure 1 Shown, a kind of calculation method of welding anti-deformation amount of the present invention comprises the following steps:

[0024] S1. Set the preset anti-deformation amount of the welding corner deformation of the workpiece to be welded, and establish a two-dimensional geometric model of the temperature field and deformation field of the workpiece to be welded according to the preset anti-deformation amount and welding conditions in the computer-aided design software. Wherein, the welding condition may include the groove type, width, thickness of the workpiece to be welded, and characteristic parameters of multi-layer multi-pass welding, and the characteristic parameters of multi-layer multi-pass welding may include welding passes. By considering the above characteristic parameters, it can be fully ...

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Abstract

The invention discloses a welding reverse deformation calculation method. The method comprises the following steps of: establishing two-dimensional geometric models of a temperature field and a deformation field of a to-be-welded workpiece according to a preset reverse deformation and a welding condition; establishing a heat conduction equation and a thermal elastoplastic control equation on the basis of the two-dimensional geometric models, physical performance and mechanical performance of the to-be-welded workpiece and a welding heat source; solving the solid-state heat conduction equationand the thermal elastoplastic equation on the basis of nonlinear finite element analysis software so as to obtain a temperature field and a welding angle deformation in the welding process; and finally determining a welding reverse deformation of the to-be-welded workpiece according to a preset reverse deformation, the welding angle deformation and a deformation target value. Compared with the traditional manners of carrying out analysis by utilizing three-dimensional models, the welding reverse deformation calculation method is capable of reducing the computational complexity of systems and ensuring the correctness of calculation results while obtaining welding reverse deformations of to-be-welded workpieces in an efficient and low-cost manner.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a method for calculating the reverse deformation amount of welding corner deformation. Background technique [0002] The welding process is actually a thermal process in which the local area of ​​the weldment is heated and then cooled and solidified. Therefore, during the welding process, since only the local area of ​​the weldment is heated and cooled, the temperature distribution of the weldment will be uneven, resulting in uneven expansion and contraction of the weldment, and welding stress will be generated inside the weldment. Welding deformation. [0003] Common welding deformations include longitudinal shrinkage deformation, transverse shrinkage deformation, angular deformation, bending deformation, twisting deformation, and wave deformation. Since the residual stress and residual deformation produced by welding seriously affect the quality, assembly accuracy and struct...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 王小杰屈朝霞夏立乾
Owner BAOSHAN IRON & STEEL CO LTD
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