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A precision analysis method for the kinematic assembly of complex products based on equivalence of deviation source
Robotic Intelligence and Automation ( IF 2.1 ) Pub Date : 2020-02-12 , DOI: 10.1108/aa-03-2019-0044
Dongping Zhao , Gangfeng Wang , Jizhuang Hui , Wei Hou , Richard David Evans

The assembly quality of complex products is pivotal to their lifecycle performance. Assembly precision analysis (APA) is an effective method used to check the feasibility and quality of assembly. However, there is still a need for a systematic approach to be developed for APA of kinematic mechanisms. To achieve more accurate analysis of kinematic assembly, this paper aims to propose a precision analysis method based on equivalence of the deviation source.,A unified deviation vector representation model is adopted by considering dimension deviation, geometric deviation, joint clearance and assembly deformation. Then, vector loops and vector equations are constructed, according to joint type and deviation propagation path. A combined method, using deviation accumulation and sensitivity modeling, is applied to solve the kinematic APA of complex products.,When using the presented method, geometric form deviation, joint clearance and assembly deformation are considered selectively during tolerance modeling. In particular, the proposed virtual link model and its orientation angle are developed to determine joint deviation. Finally, vector loops and vector equations are modeled to express deviation accumulation.,The proposed method provides a new means for the APA of complex products, considering joint clearance and assembly deformation while improving the accuracy of APA, as much as possible.

中文翻译:

基于偏差源等效的复杂产品运动学装配精度分析方法

复杂产品的装配质量对其生命周期性能至关重要。装配精度分析(APA)是一种用于检查装配可行性和质量的有效方法。然而,仍然需要为运动学机制的 APA 开发一种系统的方法。为实现更精确的运动学装配分析,本文旨在提出一种基于偏差源等价的精度分析方法,综合考虑尺寸偏差、几何偏差、关节间隙和装配变形,采用统一的偏差向量表示模型。然后,根据关节类型和偏差传播路径构造向量环和向量方程。一种组合方法,使用偏差累积和灵敏度建模,用于求解复杂产品的运动学 APA。当使用所提出的方法时,在公差建模时有选择地考虑几何形状偏差、接头间隙和装配变形。特别是,所提出的虚拟链接模型及其方向角被开发来确定关节偏差。最后,对向量环和向量方程进行建模以表示偏差累积。,该方法为复杂产品的APA提供了一种新的手段,在尽可能提高APA精度的同时考虑了接头间隙和装配变形。提出的虚拟链接模型及其方向角被开发来确定关节偏差。最后,对向量环和向量方程进行建模以表示偏差累积。,该方法为复杂产品的APA提供了一种新的手段,在尽可能提高APA精度的同时考虑了接头间隙和装配变形。提出的虚拟链接模型及其方向角被开发来确定关节偏差。最后,对向量环和向量方程进行建模以表示偏差累积。,该方法为复杂产品的APA提供了一种新的手段,在尽可能提高APA精度的同时考虑了接头间隙和装配变形。
更新日期:2020-02-12
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