Purpose

The modern manufacturing industry has put forward higher requirements for the assembly accuracy of components with the development of the industrial technology. For precision assembly, the traditional assembly process study based on tolerance has had difficulty in meeting these requirements. Hence, the distribution of the form errors must be considered. The registration between the two mating surfaces with form errors determines the parts’ assembly position, and is the basis for the prediction and control of the assembly accuracy. This study aims to provide a new surfaces registration method which takes form errors into consideration.

Design/methodology/approach

This study presents a new registration approach based on the minimum potential energy. A unique set of contact points on mating surfaces that meet the actual conditions can be obtained and the spatial position of the assembled part is calculated.

Findings

The experimental results show that the calculated values are in good agreement with the experimental values. Furthermore, the root mean square error is within 2%, which proves the validity and accuracy of the approach.

Originality/value

This paper provides an effective and new method for precision assembly which takes form errors into consideration. The method can give the optimal solution of the contact points, which is more consistent with the actual assembly situation and provides a basis for predicting assembly accuracy.

中文翻译：

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考虑形状误差以精确组装的新曲面注册方法

目的

随着工业技术的发展，现代制造业对部件的装配精度提出了更高的要求。对于精密装配，基于公差的传统装配过程研究很难满足这些要求。因此，必须考虑形式错误的分布。两个配合表面之间有形状误差的配准确定了零件的装配位置，并且是预测和控制装配精度的基础。这项研究旨在提供一种新的表面配准方法，该方法考虑了形式误差。

设计/方法/方法

这项研究提出了一种基于最小势能的新注册方法。可以获得满足实际条件的配合表面上唯一的一组接触点，并计算出装配零件的空间位置。

发现

实验结果表明，计算值与实验值吻合良好。此外，均方根误差在2％以内，证明了该方法的有效性和准确性。

创意/价值

本文提供了一种有效且新颖的精密装配方法，该方法考虑了形状误差。该方法可以给出接触点的最优解，与实际装配情况更加吻合，为预测装配精度提供依据。