中文摘要：

为了定量分析大型部件对合插配时的干涉情况，提出一种基于模板的大型部件对合插配干涉检测方法。根据插入特征与配合特征（统称插配特征）的CAD模型定制模板，匹配模板与扫描数据，匹配后的模板作为重构模型参与干涉分析。将插入特征离散为一系列垂直于装配方向的平行截面，计算每一截面在运动过程中与配合特征的渗透深度、间隙以及干涉分界线，综合所有截面的干涉情况构成插配特征的干涉情况。该方法将三维求交测试问题简化为二维问题来处理，不仅能够定量计算装配件的渗透深度、间隙，而且能够给出装配件的干涉分布情况，据此定量指导后续的装配处理。运行实例通过一对插配特征的模拟干涉检测分析，给出包括最大干涉量和干涉分布的干涉结果，验证了提出的干涉检测方法的可行性。

英文摘要：

In order to make quantitative analysis of the interference situation during insertion and fit of large components, a template based interference detection technology is proposed. The template is customized according to the CAD model of insertion and fit characteristics. After match with scanning data, the template is taken as the reconstruction model to take part in the interference analysis. The insertion characteristic is discretized into a series of parallel sections perpendicular to the assembling direction, and the penetration depth, clearance and interference demarcation line of each section relative to the fit characteristic in the process of motion is calculated. The integration of interference situations of all sections constitutes the interference situation of insertion and fit characteristics. This method simplifies the 3D intersection problem to a 2D one, and not only can calculate quantitatively the penetration depth and clearance but also can give the interference distribution of assembly parts. Based on this, the handling of follow-up assembly is guided quantitatively. Finally, through the simulated interference detection and analysis of a pair of insertion and fit characteristics, the interference results including maximum interference quantity and distribution are. given, which verifies the feasibility of the proposed interference detection technology.