基于改进约束配准的装配仿真方法研究  

Research on Assembly Simulation Method Based on Improved Constraint Registration

作　　者：赵晨[1] 赵凤霞[1] 张琳娜[1] 姚松臣 郑晨晨 ZHAO Chen;ZHAO Feng-xia;ZHANG Lin-na;YAO Song-chen;ZHENG Chen-chen(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450000,China)

机构地区：[1]郑州大学机械与动力工程学院,郑州450000

出　　处：《组合机床与自动化加工技术》2023年第3期156-159,162,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家重点研发计划项目(2017YFF0206501-01)。

摘　　要：为了预测和控制产品的装配精度,在产品设计阶段考虑产品的实际表面形貌和受力情况,真实地模拟产品的实际装配状态,提出了一种改进约束配准的零件装配公差分析方法。该方法综合考虑装配力和零件表面几何偏差的影响,以配合面上力的作用点和其对应点之间的距离最小为目标函数构建改进约束配准初始数学模型,然后基于Hertz接触理论计算受力变形量,对约束配准初始数学模型进行修正,使得两相配表面装配结果更贴合真实的接触状态。最后以螺栓连接配合面为例进行分析,仿真实验结果表明,采用改进约束配准法在产品设计阶段就可以较真实地预测两相配表面的接触状态,从而快速准确地在真实接触状态下分析和验证装配产品是否符合精度要求,为产品的装配公差分析提供了可视化手段和校验功能。In order to predict and control the assembly accuracy of the product,an assembly tolerance analysis method based on improved constraint registration was proposed to simulate the actual assembly state of products by considering the form defects and force conditions of products in the product design stage.In this method,the influence of assembly force and surface geometry deviation was considered comprehensively,and the initial mathematical model of improved constrained registration was constructed with the objective function of minimizing the distance between the operating point of the force on the mating surface and its corresponding point.Then,the force deformation was calculated based on Hertz theory,and the initial mathematical model of constrained registration was modified to make the assembly results of the two surfaces more consistent with the real contact state.Finally,taking the bolt connection mating surface as an example,the simulation results show that the improved constraint registration method can truly predict the contact state of the two mating surfaces in the product design stage,so as to quickly and accurately analyze and verify whether the assembly product meets the accuracy requirements,and provide a visualization method and verification function for the assembly tolerance analysis of the product.

关 键 词：装配仿真 几何偏差 改进约束配准法 赫兹接触理论 

分 类 号：TH161[机械工程—机械制造及自动化] TG506[金属学及工艺—金属切削加工及机床]