CAE simulation analysis method for thermal deformation of vehicle body sheet metal part

Abstract

The invention discloses a CAE simulation analysis method for thermal deformation of an vehicle body sheet metal part. The CAE simulation analysis method is characterized in that second digital-analogdata obtained through stamping deformation simulation analysis of first digital-analog data of the vehicle body sheet metal part is imported into a welding process vehicle body sheet metal part thermal deformation simulation system, third digital-analog data is obtained through performing welding thermal deformation simulation analysis on the process vehicle body sheet metal part, and fourth digital-analog data is obtained through performing coating process thermal deformation simulation analysis on the third digital-analog data. According to the CAE simulation analysis method, thermal deformation analysis can be carried out only through a vehicle body 3D digital model, the constraint condition that a real vehicle must be used in a traditional method is broken through, therefore, the verification and countermeasure time of the thermal deformation problem of the metal plate of the new vehicle type can be brought forward to the CST / P / D stage (drawing stage) from the T stage (real vehiclestage), and the quality-maturing period of the real vehicle is greatly shortened.

Description

technical field [0001] The invention belongs to the simulation technology of vehicle components, in particular to a deformation simulation technology of body sheet metal parts. Background technique [0002] Body weight reduction has become one of the main methods to improve fuel consumption in the automotive industry. A common method in the industry is to minimize the material thickness of sheet metal parts (especially the skin of the outer cover) by using new materials and optimizing the structure design of the vehicle body, while ensuring the requirements of collision and strength, so as to reduce the thickness of the body. The effect of weight, thereby reducing the fuel consumption of the vehicle. However, the thickness of the sheet metal of the outer cover (door, hood, side wall, roof, etc.) decreases, and its ability to resist deformation becomes worse. , the problems of unevenness, warping and deformation of the body-in-white after baking are increasing. [0003] Ai...

AI Technical Summary

Problems solved by technology

[0004] (1) The number of real vehicles in the trial production stage is small, and the process conditions of each workshop in the trial production stage are not solidified, so it is difficult to obtain real physical deformation results, and it is difficult to rule out the influence of accidental factors;

[0005] (2) There are many factors affecting the thermal deformation of sheet metal, and it is very difficult to find effective countermeasures through actual vehicles, often requiring multiple rounds of verification; the verification process requires the cooperation of design, stamping, welding, painting and other related departments to organize and coordinate business volume Big

Therefore, the cost of manpower and material resources consumed in the actual vehicle verification process is high, and the quality maturity cycle is long;

[0006] (3) In the trial production stage, the stamping dies, welding fixtures and other physical objects of the new model have been processed. At this time, adjusting the surface of the cover will result in high mold and fixture modification costs, which is not conducive to the development cost control of the new model.

[0007] Therefore, using the method of actual vehicle verification to deal with the thermal deformation of sheet metal will have adverse effects on improving the quality of new models, shortening the quality maturity cycle, and reducing development costs.

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