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The welding sequence of a structural component determines the method, device, equipment and storage medium

A welding sequence and determination method technology, applied in design optimization/simulation, etc., can solve problems such as slow calculation speed, few types of welding processes, and inability to obtain accuracy, so as to reduce the amount of calculation and realize the effect of numerical simulation calculation

Active Publication Date: 2021-07-30
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For large-scale structural welding, the plastic deformation of the material caused by the local high temperature near the molten pool during the welding process, the cumulative effect of plastic deformation leads to a large deformation of the overall structure, and a large amount of calculation work is required to fully reflect this cumulative deformation effect. The existing welding sequence numerical simulation method has a slow calculation speed, often the calculation time of a workpiece can reach several days or even weeks, and there are few types of welding processes that can be calculated, and it is limited to the welding sequence calculation of a few materials and models. For large Welding sequence simulation of complex parts cannot obtain a highly accurate result

Method used

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  • The welding sequence of a structural component determines the method, device, equipment and storage medium
  • The welding sequence of a structural component determines the method, device, equipment and storage medium
  • The welding sequence of a structural component determines the method, device, equipment and storage medium

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Embodiment 1

[0065] see Figure 1 to Figure 11 , the first embodiment of the present invention provides a method for determining the welding sequence of structural parts, which can be performed by a device for determining the welding sequence of structural parts (hereinafter referred to as the device for determining the welding sequence). In particular, one of the devices for determining the welding sequence or a plurality of processors, and at least include the following steps:

[0066] S101. Obtain a plurality of welding joints on the structure part model to be welded.

[0067] see figure 2 and image 3 , in this embodiment, the welding sequence determination device first obtains the pre-established three-dimensional geometric model of the structural member model to be welded and performs network division to generate a finite element model (such as figure 2 shown), according to the finite element model, obtain multiple welded joints on the structure model (such as image 3 ).

[0...

no. 2 example

[0088] see Figure 12 , the embodiment of the present invention also provides a welding sequence determination device for structural parts, including:

[0089] A welding joint obtaining unit 100, configured to obtain a plurality of welding joints on the structural part model to be welded;

[0090] The molten pool morphology acquisition unit 200 is configured to perform thermoelastic-plastic finite element analysis on each welded joint, so as to obtain the molten pool morphology corresponding to each joint;

[0091] A weld area acquisition unit 300, configured to perform local-overall plastic strain mapping according to the molten pool morphology, to obtain a weld area corresponding to each molten pool morphology;

[0092] 400, for obtaining base material areas other than the weld area according to the weld area, and establishing a base material-weld unit model;

[0093] The simulation calculation unit 500 is used to perform simulation calculations on the multiple established...

no. 3 example

[0106] The third embodiment of the present invention provides a welding sequence determination device for structural parts, including a processor, a memory, and a computer program stored in the memory, the computer program can be executed by the processor to achieve the above-mentioned The method for determining the welding sequence of the structural parts described above.

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Abstract

The invention discloses a method, device, equipment and computer storage medium for determining the welding sequence of a structural part. The method includes: obtaining a plurality of welding joints on a structural part model to be welded; Meta-analysis to obtain the molten pool morphology corresponding to each joint; local-to-global plastic strain mapping according to the molten pool morphology to obtain the weld area corresponding to each molten pool morphology; dewelding according to the weld area For the base metal area outside the seam area, the base metal-weld unit model is established; for the multiple base material-weld unit models established, different welding sequences are used for simulation calculations, and the structural part models under each welding sequence are obtained The deformation of the structure; determine the optimal welding sequence of the structural model according to the deformation. The invention can greatly reduce the amount of calculation, efficiently realize the numerical simulation calculation of the welding sequence of large and complex parts, and assist process analysts to determine the optimal welding sequence.

Description

technical field [0001] The invention relates to the application field of welding technology, in particular to a method, device, equipment and storage medium for determining the welding sequence of structural parts. Background technique [0002] The welding process is a rapid and uneven thermal cycle process, often accompanied by melting, solidification and flow of the molten pool. The flow behavior in the molten pool directly affects the energy distribution in the welding process, and then affects the thermal stress and residual stress and out of shape. At the same time, the welding process is a very local thermal process, accompanied by highly nonlinear, especially the high-energy beam welding process, due to its pinhole effect, the high temperature area centered on the pinhole is formed instantaneously. Compared to the material's absorption of welding energy, the heat conduction rate inside the material is much slower. Therefore, the weldment has extremely high temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23
Inventor 庞盛永梁吕捷王靖升李一凡黄安国
Owner HUAZHONG UNIV OF SCI & TECH
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