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Deformation simulation method for multilayer multi-pass welding of Invar steel plate

A simulation method and steel plate technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of long test period, affecting the production and use time of components, and large residual deformation, so as to optimize the welding scheme and save energy. The effect of cost and time

Active Publication Date: 2013-12-11
SHANGHAI AIRCRAFT MFG +1
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Problems solved by technology

[0003] Invar steel mold manufacturing is mostly done by welding. Due to the large mold size, the residual deformation after welding is relatively large, and physical tests or empirical methods are used to control Invar steel welding deformation. The test period is long and the cost is high. High, seriously affecting the time when components are put into production

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  • Deformation simulation method for multilayer multi-pass welding of Invar steel plate
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  • Deformation simulation method for multilayer multi-pass welding of Invar steel plate

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Embodiment Construction

[0036] Below, the present invention will be described in further detail in conjunction with the accompanying drawings.

[0037] see figure 1 , a kind of Invar steel plate multi-layer multi-pass welding deformation simulation method, comprising the following steps:

[0038] The first step S1: Establish a three-dimensional model of the temperature field and stress field of the different groove forms of the Invar steel plate:

[0039] Specifically, in computer-aided design software such as CAD software, three-dimensional geometric models of different groove forms of components are established, and targeted meshing is carried out for different regions of components; the so-called "targeted meshing" refers to weld seam The area and the area close to the weld are densely divided, and the transition method is adopted, so that the grid size becomes larger as the distance from the weld increases.

[0040] The second step S2: Based on the three-dimensional model of the temperature fie...

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Abstract

The invention relates to a deformation simulation method for the multilayer multi-pass welding of an Invar steel plate. The method comprises the following steps of establishing a three-dimensional temperature field and stress field model of the Invar steel plate, and solving radial deformation results under different conditions on the basis of nonlinear finite element analysis software by changing realistic clamping conditions, a welding sequence and the shape of a groove to obtain an optimization method for controlling welding deformation. According to the deformation simulation method for the multilayer multi-pass welding of the Invar steel plate, the three-dimensional temperature field and stress field model of the Invar steel plate is established for the multilayer multi-pass welding process of the Invar steel plate, the problem of interaction between cross welds is also taken into account, and different set boundary conditions are solved to obtain the optimization method for controlling the welding deformation.

Description

technical field [0001] The invention relates to a deformation simulation method for multi-layer and multiple-pass welding of Invar steel plates, especially aimed at the radial deformation caused by the welding of large curved thick plates of Invar steel. Background technique [0002] Invar steel belongs to the precision alloy of the low expansion alloy category, it has a large number of applications, and the product value is also high. It is widely used in the electronics industry, and it is needed for electron tubes, transistor integrated circuits, and capacitors. In recent years, Invar steel has developed new applications due to its similar thermal expansion coefficient to composite materials. It has been widely used In the manufacture of composite material molds, many problems that arise when ordinary steel materials are used to manufacture composite material molds are solved, such as: the size of the composite material after forming is different from the theoretical valu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 陈洁董志波占小红王玉华刘红兵张家铭郑文健
Owner SHANGHAI AIRCRAFT MFG
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