虚拟装配下液力变矩器装配体位置公差优化  

Position tolerance optimization of assembly of hydraulic torque converter under virtual assembly

作　　者：边骥轩 郝青华 栗丽辉 姚寿文[3] BIAN Jixuan;HAO Qinghua;LI Lihui;YAO Shouwen(No.201 research institute of China Ordance,Beijing 100072,China;Inner Mongolia First Machinery Group Co.,Ltd.,Baotou 014030,China;Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]中国兵器第二〇一研究所,北京100072 [2]内蒙古第一机械集团有限公司,内蒙古包头014030 [3]北京理工大学,北京100081

出　　处：《兵器装备工程学报》2023年第12期88-96,共9页Journal of Ordnance Equipment Engineering

基　　金：VTDP项目:综合传动机械零部件数字化精确装配技术。

摘　　要：液力变矩器装配体公差,即配油套的径向圆跳动量,是反映变矩器能否高速工作的关键指标。配油套径向圆跳动除了受零件公差分配影响,还受装配序列的影响。虚拟现实辅助装配虽可用于产品的可装配性设计,但缺失公差信息,无法反映产品的实际装配质量。基于Unity3D渲染引擎,建立了集成三维信息标注、公差分析、公差优化和试验验证4个模块的虚拟现实辅助公差优化的虚拟装配系统。建立了以提高装配精度为目标,限制装配成本和质量损失的公差优化模型,提出了最大适应度值的一半为判断标准的交叉操作,改进了自适应遗传算法,以2个变量的Schaffer函数进行了算法验证,采用蒙特卡洛法进行了装配体位置公差预测。虚拟装配试验结果表明,虚拟装配系统可实现液力变矩器装配体公差组成环零件设计公差的优化,以及预测不同装配序列下装配体的位置公差,提高了液力变矩器公差设计效率。The tolerance of the hydraulic torque converter assembly,that is,the radial circular runout of the oil distribution sleeve,is the key performance indicator which reflects whether the hydraulic torque converter can work at high speed.The radial runout of the oil distribution sleeve is not only affected by the tolerance distribution of the parts,but also by the assembly sequence.Although virtual reality aided assembly can be used for design for assembly of products,the lack of tolerance information can not reflect the assembly quality of actual products.Based on the Unity3D rendering engine,a virtual assembly aided tolerance optimization system has been established that integrates four modules of 3D information annotation,tolerance analysis,tolerance optimization,and experimental verification.This system can establish the assembly sequence of the hydraulic torque converter with human-machine interaction,where the practical engineering experience of the operators can be used.It also includes a tolerance optimization model aimed at improving assembly accuracy,limiting assembly costs and quality losses.In response to the problem of adaptive genetic algorithms being prone to local optima,the improved adaptive genetic algorithm is provided by adjusting the cross probability and mutation probability values based on population fitness,moreover,the Monte Carlo method is included to predict the radial circular runout of torque converter.The virtual assembly experiment of hydraulic torque converter shows that the system can optimize the parts’tolerance values of hydraulic torque converter,predict the radial circular runout of different assembly sequences,and improve the tolerance design efficiency.

关 键 词：虚拟现实辅助装配 液力变矩器 径向圆跳动 公差分析 改进的自适应遗传算法 装配体公差优化 

分 类 号：TH124[机械工程—机械设计及理论]