Large ship engine cylinder body milling method based on improved genetic algorithm

Abstract

The invention discloses a large ship engine cylinder body milling method based on an improved genetic algorithm, which comprises the following steps: before milling, firstly establishing a cylinder body machining parameter optimization mathematical model, and then solving the mathematical model by adopting the genetic algorithm to obtain milling machining optimization parameters. The genetic algorithm comprises the following steps that an initialized population N is generated, n is equal to 0, and t is equal to t0; an algorithm termination condition is judged, and a multi-objective optimization parameter is output if n<MaxgenVt<tf; otherwise, fitness evaluation is carried out on the nth generation, and the optimal individual fitness value Fbest is reserved; an average fitness value Favg ofthe nth generation is calculated, if Fbest is less than Favg, a large mutation operation is executed, otherwise, an (n+1)th generation is generated according to a common mutation probability; the fitness value of the (n+1)th generation is calculated, the optimal fitness value Gbest and the worst fitness value Gbad are found out, and if Gbest is smaller than Fbest, Gbad is equal to Fbest; and theannealing temperature is adjusted, t=t*a, and it is continued to judge the algorithm termination condition. The method has the advantages that the optimal parameters of actual machining can be obtained through the cylinder body side face milling simulation machining process, so that the machining quality and the production efficiency of ship engine cylinder body parts are improved.

Description

technical field [0001] The invention relates to the technical field of marine engine cylinder processing, in particular to a large-scale marine engine cylinder milling method based on an improved genetic algorithm. Background technique [0002] Precise parts such as ship engine cylinders need to be trial-cut before they are put into actual mass production. The first-piece trial-cut cycle is long, which consumes a lot of manpower and material resources, and unreasonable selection of processing parameters will result in low utilization of CNC machine tools and limit the production of processing machine tools Efficiency, prolong product production cycle. Among them, the milling of the side of the cylinder block takes a relatively long time. The use of traditional processing parameters has problems such as low machine tool production efficiency and high part production costs. It is urgent to optimize the processing parameters to improve machine tool utilization and product produ...

AI Technical Summary

Problems solved by technology

[0002] Precise parts such as ship engine cylinders need to be trial-cut before they are put into actual mass production. The first-piece trial-cut cycle is long, which consumes a lot of manpower and material resources, and unreasonable selection of processing parameters will result in low utilization of CNC machine tools and limit the production of processing machine tools Efficiency, prolong product production cycle

Among them, the milling of the side of the cylinder block takes a relatively long time. The use of traditional processing parameters has problems such as low machine tool production efficiency and high part production costs. It is urgent to optimize the processing parameters to improve machine tool utilization and product productivity and ensure stable processing quality. Reduce manpower and material resources consumption

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