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Numerical simulation calculation method for multi-layer and multi-pass welding process of header tube socket

A multi-layer multi-pass welding and welding process technology, which is applied in the field of welding numerical simulation, can solve problems such as stress concentration, high welding technical difficulty, and large weld thickness, and achieve rapid modeling and significant laying effects

Pending Publication Date: 2021-07-23
SHIHEZI UNIVERSITY
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Problems solved by technology

This kind of weld seam is thicker, the stress distribution is more complicated, there is serious stress concentration phenomenon, welding deformation and cracks are easy to appear, and the welding technology is difficult

Method used

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  • Numerical simulation calculation method for multi-layer and multi-pass welding process of header tube socket
  • Numerical simulation calculation method for multi-layer and multi-pass welding process of header tube socket
  • Numerical simulation calculation method for multi-layer and multi-pass welding process of header tube socket

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Embodiment Construction

[0012] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0013] Such as figure 1 , figure 2 , image 3 As shown, a numerical simulation calculation method for the multi-layer multi-pass welding welding process of the header pipe seat shown in the present invention includes the following steps. Step S1: Establish a three-dimensional thermal-mechanical coupling calculation model of the pipe seat, header, and weld, and divide the solid model of the weldment of the header pipe seat into a finite element mesh to form several mesh units of the solid model. Step S2: Set the initial conditions and boundary conditions of the welding model. Step S3: Determine the heat source equation and welding parameters used for the saddle we...

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Abstract

The invention discloses a numerical simulation calculation method for a multi-layer and multi-pass welding process of a header tube socket. The method comprises the following steps: S1, establishing a three-dimensional thermal coupling calculation model of a tube socket, a header and a welding seam, and performing finite element mesh generation on a solid model of the header tube socket weldment to form a plurality of mesh units of the solid model; S2, setting initial conditions and boundary conditions of the welding model; S3, determining a heat source equation and welding parameters used by the saddle-shaped welding seam of the header pipe base; and 4, submitting and solving the task, and carrying out post-processing and analysis. According to the structural features of the saddle-shaped welding seam of the tube socket header, the entity model is established in a targeted mode, grids are divided in a regional mode, welding heat source parameters are corrected, the change rule of a post-welding temperature field and a stress-strain field can be predicted, and the actual saddle-shaped welding seam welding process is guided.

Description

technical field [0001] The invention belongs to the field of welding numerical simulation, and in particular relates to a numerical simulation calculation method for multi-layer multi-pass welding welding process of header pipe seat, which can realize the temperature field and stress-strain field of the saddle-shaped weld multi-layer multi-pass welding welding process Numerical simulation calculations. Background technique [0002] With the extensive use of pressure vessels in industrial production, the welding of saddle-shaped curve welds formed by orthogonal intersecting pipes has gradually become an important factor affecting the quality of pressure vessels. This kind of weld is thicker, the stress distribution is more complicated, there is a serious stress concentration phenomenon, welding deformation and cracks are prone to occur, and the welding technology is difficult. Therefore, how to effectively control the post-weld residual stress and deformation of the welded j...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/23G06F111/04G06F111/10G06F119/08G06F119/14
CPCG06F30/17G06F30/23G06F2111/04G06F2111/10G06F2119/08G06F2119/14
Inventor 胡雪买春亮郑雄飞史雪宾陈育龙
Owner SHIHEZI UNIVERSITY
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