Method for optimizing weld lines on unequal-thickness tailor-welded panels

Abstract

The invention discloses a process optimization method adapting to reasonably arrange panel weld lines for automobile tailor-welded panel coverings based on mesh mapping and genetic algorithms. The method comprises the following steps; first, establishing a simulation model; second, reversely determining and designing initial limit positions of weld lines on a panel by mesh mapping; third, determining a design method to obtain sample data points; fourth, constructing a response surface model of composite conditions; five, solving an optimization approximate model; sixth, performing simulation analytic inspection results according to a combination of optimal solutions of the optimization model; compared with production methods singly depending on process parameter adjustment to control weld line positional deviations and the design of panel weld lines based on artificial experience, the method that optimizes the process in connection with the shape and position of panel weld lines by the aid of mesh mapping through establishing the simulation model has the advantages that positional precision of tailor-welded panel weld lines after impact forming and forming performance can be improved.

Description

technical field [0001] The invention discloses a process optimization method suitable for rationally arranging welding seam lines of automobile tailor welded blank cover parts based on grid mapping and genetic algorithm. Background technique [0002] Tailored laser welding technology can splice steel plates of different materials and thicknesses into a complete stamping blank. It is one of the important ways to realize the lightweight of the car body and has been widely used in the field of car body stamping. In the actual stamping production process, the shape and position of the weld line on the flat blank will change with the plastic deformation of the sheet, resulting in drift, and eventually deviate from the product design weld line. Therefore, it is necessary to control the weld line during the stamping process. The drift of the seam, so that the position deviation from the design weld line is within the tolerance range. At present, there are two ways to control the d...

AI Technical Summary

Problems solved by technology

Since the binding force of the drawbead and the shape of the blank will have a great influence on the final quality of the stamping, the actual effect of the method of process control weld is very limited

Another method is to control the drift of the weld line after the final forming by adjusting the position of the weld line of the blank under the premise of ensuring the quality of the stamping parts. This method is very effective, but at present it is generally determined in advance by experience. The position of the seam line, so there is no guarantee for the control accuracy of the weld line drift after forming

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