Method for obtaining finite element simulation heat source model of deep penetration welding

A technology of heat source model and acquisition method, applied in design optimization/simulation, welding equipment, auxiliary welding equipment, etc.

Active Publication Date: 2021-03-16
SHANGHAI UNIV OF ENG SCI
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Problems solved by technology

[0005] The purpose of the present invention is to provide a finite element simulation heat source model acquisition method of deep penetration welding, which adopts a rotating

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  • Method for obtaining finite element simulation heat source model of deep penetration welding
  • Method for obtaining finite element simulation heat source model of deep penetration welding
  • Method for obtaining finite element simulation heat source model of deep penetration welding

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Embodiment Construction

[0029] Such as figure 1 As shown, the embodiment of the present invention provides a finite element simulation heat source model acquisition method for deep penetration welding, which is used to obtain the heat source model corresponding to the weld seam of the high penetration locking process welding sample; it is characterized in that it includes the following steps:

[0030] (S1) Obtain the image of the weld cross section from the high penetration locking process welding sample; the weld cross section includes the non-passivated region 10 from the upper surface of the sample to the lower surface and the bottom surface of the non-passivated region 10 and downward from the lower surface of the sample Raised passivation area 20 .

[0031] Specifically, such as figure 1 As shown, the high penetration lock process welding sample is made by welding two workpieces with equal thickness by high penetration lock process without opening the groove. The image of the cross-section of ...

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Abstract

The invention discloses a method for obtaining a finite element simulation heat source model of deep penetration welding. The method is used for obtaining a heat source model corresponding to a weld joint of a high-melting deep-locking process welding sample. The method comprises the following steps of (S1) obtaining an image of a weld joint section, wherein the weld joint section comprises a non-passivation region and a passivation region; (S2) obtaining size parameters of the non-passivation region and the passivation region; (S3) fitting a side curve of the non-passivation region; and (S4)according to results of the steps (S2) and (S3), determining an expression of an effective action radius of a heat source, and building a rotator heat source model. According to the method, the rotator heat source is adopted to perform modeling on the heat source of the deep penetration welding, so that the actual situation of the deep penetration welding is better met. The heat source model is asingle-function heat source model, so that the problem of matching of multiple models does not exist; and the definition of the heat source model can be realized only by inputting geometric dimensiondata related to the weld joint. Compared with a combined heat source, the heat source model has the self-evident advantages.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a method for obtaining a finite element simulation heat source model of deep penetration welding. Background technique [0002] The high penetration lock welding process is a high-efficiency, high-quality and large-penetration welding process developed from the Tig welding process. The current used is much larger than that of the general Tig welding process. Its single-pass penetration capability is far superior to traditional Mig welding and Tig welding processes. Therefore, it can realize the welding of metal materials on the basis of not opening a groove. [0003] Due to its process characteristics, its welding heat source performance is different from traditional welding heat sources. In finite element simulation, traditional Mig welding and Tig welding use heat source models such as ellipsoid, Gaussian, and double ellipsoid. However, these models are mainly aimed at the ...

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Application Information

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IPC IPC(8): B23K37/00G06F30/17G06F30/23
CPCB23K37/00G06F30/23G06F30/17G06F2111/10G06F2119/08
Inventor 刘红兵
Owner SHANGHAI UNIV OF ENG SCI
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