Wear optimization design of rolling linear guide based on Kriging model
In order to improve the wear resistance ot rolling linear guide,combined with the wear test and theoretical analysis,the maximum impact force,maximum contact stress and friction resistance were taken as optimization goals.The constraint function of slider reaction force and the range of structural parameters were determined by the desgin requirement.By analyzing the parameter sensitivity,initial contact angle,curve ratio of the slider raceway,ball diameter and the increment of the rail height were selected as variables;CCRD and Kriging response surface were optimized to construct the agent model.Through the NSGA-Ⅱ algorithm,the friction resistance and maximum impact force of the structure were reduced by 2.09％and 15.00％,respectively,while the maximum contact stress increased by only 4.33％.The ball diameter decreased from 5.56 mm to 5.1744 mm,and the initial contact angle decreased from 45° to 38.878°.Through Spearman correlation analysis,it was observed that the coefficient value between the ball diameter and the slider reaction force was 0.23,and the coefficient value between the initial contact angle and slider reaction force reached-0.82.These two variables balanced each other to achieve the optimal solution in optimization.
rolling linear guidewear resistanceoptimization designKriging modelNSGA-Ⅱ algorithm
NETL
NSTL
万方数据
