| A reasonable layout design is very important to improve the productivity of forging automation lines.Traditional design methods rely on the experience of engineers to optimize the layout and use special software for verification.This design method lacks theoretical guidance and is difficult to make evaluations.Therefore,a rational and effective method is needed to design and optimize the layout of the equipment.This paper takes the efficiency improvement demand of an enterprise’s automated crankshaft forging production line as the background,takes the bottleneck unit as the research object,and aims to find a better layout solution.Based on the mathematical modeling of the robot and forging unit,this paper proposes the method of equipment hierarchical description and the prediction method of the trajectory transition point,considers the influence factors of high-temperature hot forgings on layout optimization,and determines the robot running time and robot operability as the evaluation indexes of the unit layout.Under the condition of satisfying the interference test and layout constraints,the NSGA-Ⅱ algorithm with improved elite strategy is designed to program,and solve the layout problem to obtain the Pareto frontier solution of the multi-objective layout optimization problem.The relatively optimal solution of the layout problem discussed in this paper is determined by comparing and analyzing the layout solutions in the frontier solution.After simulation and practical application of the layout solution,the optimization method’s rationality and layout solution were verified.Compared with the pre-optimized layout plan,the optimized plan has improved performance in both runtime and operability indicators,significantly increasing productivity. |
