基于MBD的复杂特征检测工艺规划技术研究

Research on Measuring Points and Their Distributed Strategy of Inspection Feature Based on MBD

随着数字化集成制造系统的发展与应用,数字化检测技术作为数字化集成制造系统中的重要组成部分,工程需求日益强烈。针对数字化检测过程中缺乏合理的检测工艺的问题,在研究了传统检测方法的基础上,结合MBD技术,提出了基于MBD的三维检测工艺的关键技术。分析了影响采样点数量及其分布的主要因素,利用量化分析法推导得出了确定规则曲面、不规则平面的测量点数公式。根据采样点数量和被测元素特点,提出了自适应划分形心采样方法,获得了基于复杂特征的检测工艺规划。通过试验验证了所提出测量点数公式和自适应划分形心采样方法的合理性和准确性。

With the development and application of digital integrated manufacturing system, digital inspection technology as an important part of digital integrated manufacturing system is needed urgently. For the problem that lack of reasonable process during digital inspection, on the basis of the traditional inspection methods, combined with MBD technology, key technology of 3D inspection process based on MBD was proposed. The main factors that influencing the number of sampling points and their distribution were analysed. Ruled surface and complex plane formulas were derived for measuring points using quantitative analysis method. According to the number of sampling points and the characteristics of the measured element, to obtain the inspection process planning based on complex features, sampling method of adaptively dividing centroid is proposed. The rationality and accuracy of measuring points formula and sampling method adaptively dividing centroid is verified by experiment.