A method for distributing welding spots of a body-in-white

Abstract

The invention discloses a method for distributing welding spots of a body in white. The allocation method includes: obtaining the three-dimensional coordinates of the welding points of the body-in-white and the welding robot, the working hours of the welding robot, the working moving speed, the number of iterations, the population size, the crossover probability and the mutation probability; judging whether the number of cycles reaches the number of iterations, If so, calculate the optimal individual in the third-generation population to get the optimal result; otherwise, continue to select individuals in the population through the binary tournament selection method according to the non-dominated set of the third-generation population and the aggregation distance of the individual to enter the second generation. Four generations of population. By obtaining the three-dimensional coordinates of the welding points of the body-in-white, the working speed, the working time and the three-dimensional coordinates of the welding robot, the distance matrix between the welding points and the robot is established. The invention transforms part of the constraints into an objective, which can help the algorithm to obtain the global optimal solution.

Description

technical field [0001] The invention relates to the field of welding spot allocation planning, in particular to a method for allocating welding spots of a body in white. Background technique [0002] The car body is an important part of the car, so that the manufacturing cost of the whole car parts carrier accounts for about 40% to 60% of the whole car. During production, there are as many as 4000 to 5000 solder joints. In order to manufacture high-quality, high-efficiency and low-cost car bodies, multi-robot welding technology is widely used in car body manufacturing. In order to reduce the time required for tact, optimize the allocation of robot resources, and improve the efficiency and quality of body-in-white manufacturing, robot welding tasks must be Careful planning, reasonable allocation of many welding spots to each welding robot. The traditional welding spot assignment principle is to delineate the working space for the welding robot, and the welding robot only wel...

AI Technical Summary

Problems solved by technology

However, in the welding station where multiple robots work together, there are often solder joints in the overlapping area of ​​the workspace of multiple robots

In such a case, it cannot be effectively solved by simply dividing by region

[0003] The regional division method in the prior art cannot optimize the allocation of robot resources, reducing the efficiency and quality of body-in-white manufacturing

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