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为提高同步器齿环热精锻成形的材料利用率,提出一种基于响应面模型(Response Surface Method,RSM)与粒子群算法(Particle Swarm Optimization,PSO)结合的工艺参数优化方法。分别选择坯料始锻温度、压制速度、摩擦因子和坯料高度作为设计变量,并借助数据归一化法和线性加权法等数据处理方法,建立齿环热精锻成形综合加权评分值与主要工艺参数的响应面模型,在可行域范围内,采用粒子群算法,寻找响应面模型的最优解。结果为:坯料始锻温度T=725℃,压制速度v=200 mm·s-1,摩擦因子μ=0.4,坯料高度h=15.5 mm。最后,通过CAE分析和生产试制进行验证可知,齿环锻件充填饱满,未见折叠缺陷,材料利用率提高了9.44%。
In order to improve the material utilization efficiency of synchronous hot forging, a method of optimizing process parameters based on Response Surface Method (RSM) and Particle Swarm Optimization (PSO) was proposed. The initial forging temperature, the pressing speed, the friction factor and the blank height were selected as the design variables respectively. The data of normalized and linear weighting methods were used to establish the integrated weighting score and the main process parameters The response surface model is used to find the optimal solution to the response surface model by using particle swarm optimization in the feasible range. The results are as follows: initial forging temperature T = 725 ℃, pressing speed v = 200 mm · s-1, friction factor μ = 0.4 and blank height h = 15.5 mm. Finally, CAE analysis and production trial verification shows that the toothed ring forging filled full, no folding defects, material utilization increased by 9.44%.