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Optimization system of laser tailor-welded blank technology based on property prediction and method

A technology for performance prediction and process optimization, applied in laser welding equipment, welding equipment, manufacturing tools, etc., to achieve the effect of friendly interface, easy debugging and process improvement

Inactive Publication Date: 2013-10-23
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 of the mechanical property prediction and process optimization methods of laser tailor welded blanks

Method used

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  • Optimization system of laser tailor-welded blank technology based on property prediction and method
  • Optimization system of laser tailor-welded blank technology based on property prediction and method
  • Optimization system of laser tailor-welded blank technology based on property prediction and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Taking 1.5mm St12 sheet / galvanized sheet tailor-welded blank 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 to 1mm, the absorption rate is 0.7, and the focal length of the welding lens is 127mm.

[0044] Using MATLAB software to map the existing welding process parameters and mechanical properties j=0, 1,...k, i=1, 2) to perform PLS calculation, the algorithm steps are as follows.

[0045] Step 1: Relevant process data of weldment samples (≥9), as shown in Table 1.

[0046] Table 1 Relevant process data of weldment samples

[0047]

[0048] 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.

[0049] Table 2 Correlation coefficient matrix between input variables and output variables in weld are...

Embodiment 2

[0081] Taking 0.8mm St12 plate / 1.5mm galvanized sheet tailor-welded blank as an example, the welding process is the same as that of Example 1, and the modeling and optimization process and steps are the same as Example 1

[0082] Step 1: Relevant process data of weldment samples (≥9), as shown in Table 7.

[0083] Table 7 Relevant process data of weldment samples

[0084]

[0085] After steps 2 to 4 described in Example 2, a PLS prediction model group of mechanical properties is obtained, as shown below.

[0086] Yield strength y 1 for:

[0087] the y 1 =-0.0471x 1 +39.1667x 2 -21.4414x 3 +202.0455

[0088] Tensile strength y 2 for:

[0089] the y 2 =-0.0472x 1 +38.3333x 2 -23.8288x 3 +359.7018

[0090] Elongation y 3 for:

[0091] the y 3 =0.0103x 1 -6.6667x 2 +4.2793x 3+16.6625

[0092] Step 5: Prediction accuracy inspection and control

[0093] Import the process data of the pre-processing module into the mechanical property prediction module to pre...

Embodiment 3

[0101] Taking 1.5mm high-strength galvanized steel DOGAL800DP / super-drawn steel BUSD tailor-welded blank as an example, the welding process adopts single-sided welding and double-sided forming. The welding process parameters are: laser power 900-1400W, welding speed 1-2m / min, the spot diameter is 0.3-1.0mm, the absorption rate is 0.7, and the focal length of the welding lens is 127mm. Its modeling and optimization process and steps are the same as those in Example 1.

[0102] Step 1: Call a group (≥9) of relevant process data randomly, as shown in Table 9.

[0103] Table 9 Relevant process data of weldment samples

[0104]

[0105] After steps 2 to 4 described in Example 1, a PLS prediction model group of mechanical properties is obtained, as shown below.

[0106] Tailored welded blank yield strength y 1 for:

[0107] the y 1 =-0.0187x 1 +9.0000x 2 -13.8739x 3 +250.9757

[0108] Tailored welded blank tensile strength y 2 for:

[0109] the y 2 =-0.0193x 1 +10.3...

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Abstract

The invention relates to an optimization system of a laser tailor-welded blank technology based on property prediction and a method. The system comprises a database, a pre processing module, a mechanical property prediction module, a technology optimization module and a post processing module, wherein the pre processing module is used for reading basic information and technological parameter on welders and base metals needed in the laser welding process from the database so as to provide initial conditions for the follow-up flows; the mechanical property prediction module is used for simulating different technological states to obtain the property prediction value of a target and a corresponding optimal PLS prediction model set, wherein the relative error of the property prediction value is less than or equal to 5%; the technology optimization module is used for calling out all built-in yield-strength ratios of the tailor-welded blanks in the system after users input the related information on the welded base metals based on the built-in optimization property scope in the system database, and then is used for selecting the yield-strength ratio, and finally the optimal PLS prediction model set is used for carrying out reverse solution to obtain the technological scheme for optimalizing the mechanical property of the tailor-welded blanks; and the post processing module is used for finishing display and output of the result.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a system and method for formulating and optimizing a laser welding process according to the performance requirements of tailor welded blank products. Background technique [0002] In recent years, with the growth of the national economy, economical and practical cars have attracted much attention because of their light weight, low fuel consumption and high safety. Since the application of tailor-welded blanks reduces the quality of the body and production costs, it is widely used in automobile manufacturers. However, for a long time, the research and development work on various high-performance tailor-welded blanks has been limited to experimental observation and general theoretical discussion, especially when it comes to the process design and process optimization of various tailor-welded blank structures, it is rarely given Quantitative process simulation and its predict...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/20B23K26/24
Inventor 李新城朱伟兴徐志伟高毫荣
Owner JIANGSU UNIV