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Prediction method for corrosion resistance of laser welding plate, and system thereof

A performance prediction, laser tailor welding technology, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., to achieve the effect of easy operation, excellent universality and friendly interface

Inactive Publication Date: 2013-02-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the patent results on the prediction of corrosion resistance of tailor-made welded blanks and the corresponding process optimization methods

Method used

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  • Prediction method for corrosion resistance of laser welding plate, and system thereof
  • Prediction method for corrosion resistance of laser welding plate, and system thereof
  • Prediction method for corrosion resistance of laser welding plate, and system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Taking the St12 plate / St12-based galvanized sheet tailor-welded blank with an equal thickness of 1.2mm as an example, the welding process adopts single-sided welding and double-sided forming. The welding process parameters are: power P=1525~1850W, welding speed 1.6~2.0m / min , Spot diameter Φ0.3mm ~ 1mm, absorption rate 0.7, focal length of welding lens is 127mm.

[0045] Using MATLAB software to map the existing welding process parameters and mechanical properties beta j ,j=0,1,...k,i=1,2) to perform PLS calculation, the algorithm steps are as follows.

[0046] Step 1: Relevant process data of weldment samples (≥9), as shown in Table 1.

[0047] Table 1 Process parameters and experimental results of weldment samples

[0048]

[0049] Step 2: Investigate the issue of multiple correlations between input variables. It can be seen from Table 2 that the multiple correlations between input variables are obvious.

[0050] Table 2 Correlation coefficient matrix between ...

Embodiment 2

[0070] Taking the 1.2mm St12 / St16 tailor-welded blank as an example, the welding process adopts single-sided welding and double-sided forming. The welding process parameters are: power P=850~1450W, welding speed 1.0~2.0m / min, spot diameter Φ0.3mm ~1mm, the absorption rate is 0.7, and the focal length of the welding lens is 127mm. The modeling and optimization process and steps are the same as in Example 1.

[0071] Step 1: Relevant process data of weldment samples (≥9), as shown in Table 5.

[0072] Table 5 Process parameters and experimental results of weldment samples

[0073]

[0074] After steps 2 to 4 described in Example 1, the PLS prediction model of corrosion resistance is obtained, as shown below.

[0075] Corrosion rate η of tailor welded blank is:

[0076] η=-0.0058x 1 +0.7836x 2 -2.1347x 3 +19.0347

[0077] x in the above formula 1 — laser power (W), x 2 — Welding speed (m / min), x 3 — Spot diameter (mm).

[0078] Step 5: Prediction accuracy inspection...

Embodiment 3

[0084] Taking 0.8mmSt16 / 1.5mmSt12 base galvanized tailor-welded blank as an example, the welding process adopts single-side welding and double-side forming, and the welding process parameters, modeling and optimization process and steps are the same as those in Embodiment 1.

[0085] Step 1: Relevant process data of weldment samples (≥9), as shown in Table 7.

[0086] Table 7 Process parameters and experimental results of weldment samples

[0087]

[0088]

[0089] After steps 2 to 4 described in Example 1, the PLS prediction model of corrosion resistance is obtained, as shown below.

[0090] Corrosion rate η of tailor welded blank is:

[0091] η=-0.0068x 1 +0.8342x 2 -0.8657x 3 +19.5873

[0092] x in the above formula 1 — laser power (W), x 2 — Welding speed (m / min), x 3 — Spot diameter (mm).

[0093]Step 5: Prediction accuracy inspection and control

[0094] Import the process data of the pretreatment module into the corrosion resistance prediction module to ...

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Abstract

The present invention relates to the technical field of laser welding, specifically to a prediction method for corrosion resistance of a laser welding plate, and a system thereof. The system comprises a database, a pre-processing module, a corrosion resistance prediction module and a post-processing module, wherein the pre-processing module reads base information and process parameters of welding parts and base materials required by a laser welding process from the database to provide initiate conditions for the follow-up process, the corresponding optimal PLS prediction model and corrosion resistance rate prediction values having a target relative error of less than or equal to 5% can be obtained with the corrosion resistance prediction module through simulation of different process states, and based on the corrosion resistance rate prediction values, reverse calculation is performed according to an inverse mapping principle to obtain the optimal welding process scheme corresponding to the minimum prediction value, wherein the optimal welding process scheme is the combination of the optimal process parameters.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a method and system for predicting the corrosion resistance of laser tailor welded blanks. Background technique [0002] In recent years, with the growth of the national economy, the automobile industry has developed vigorously. Economical and practical automobiles are favored by consumers for their light weight, low fuel consumption, and high safety. The application of tailor-welded blanks reduces the quality of the body and reduces the production cost, and is adopted by more and more automobile manufacturers. Tailored laser welding is not only used in the transportation equipment manufacturing industry, but also in the construction industry, bridges, home appliance plate welding production, steel rolling line steel plate welding (steel plate connection in continuous rolling) and other fields. For a long time, the optimization of laser welding process and the control of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
Inventor 李新城朱伟兴何建华赵从光张云庄志平
Owner JIANGSU UNIV
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