Penetration prediction and control method and system for laser welding of tapered leaf spring

Abstract

The invention discloses a penetration prediction and control method for laser welding of a tapered leaf spring, which comprises the following steps: 1) obtaining laser power parameters and welding seam section information in the process from under-penetration to over-penetration through the technological test and metallographic structure observation of laser welding of a tapered leaf spring made of a certain material; 2) by mean of regression analysis, constructing a regression model of laser weld penetration of the tapered leaf spring, according to the error characteristics, judging the accuracy of the model and selecting a best model; and 3), according to the changing rule of thickness of the tapered leaf spring which needs laser welding, calculating to obtain the optimum processing parameters through the regression model. The invention can predict and control the information of welding seam section topography of laser welding of the tapered leaf spring.

Description

technical field [0001] The invention relates to a penetration prediction and control method for laser welding of thickened cross-section plates, in particular to a method and system for predicting and controlling the cross-sectional shape information of laser welded seam of thickened cross-section plates. Background technique [0002] The automobile industry is a national pillar industry, and energy conservation and emission reduction have become a revolutionary topic for the low-carbon development of the automobile industry. The use of thickened cross-section plates can effectively reduce the weight of automobiles on the basis of ensuring the strength of automobile parts. However, in the application process, it was found that the connection of materials with thickened cross-sections has become one of the key problems that need to be solved urgently in the manufacturing process of this type of materials. The total amount of welding heat input is achieved. Laser welding tec...

AI Technical Summary

Problems solved by technology

The limitation of this method is that any uncertain disturbance (such as plate thickness deviation, assembly gap change, laser power fluctuation, etc.) Coarse suture tissue, stomata and other defects

Therefore, it is difficult to reliably apply the method of controlling deep penetration of thickened cross-section materials based on manual experience in the mass welding manufacturing process on the production line.

Images