中文摘要：

针对介观尺度零件制造过程中的加工精度控制问题,提出包括尺寸误差传递模型、多元统计过程控制和误差源诊断的加工精度控制体系,为精密微小零件多工序数字化制造提供了技术基础。通过研究介观尺度零件的特点及其在切削加工中的特性,提出基于微细切削尺度效应的工件变形和刀具变形引起的加工误差模型,构建了介观尺度零件尺寸误差传递的状态空间模型;在此基础上提出集成尺寸误差模型和多元统计过程控制的质量监控策略以及基于协方差分析的误差源诊断方法,实现了对介观尺度零件加工误差的诊断与加工精度的控制。以不锈钢工件微细槽铣削加工为例,验证了模型的有效性和可行性。

英文摘要：

Aiming at the machining accuracy of meso-scale component with small size, high precision and various of error sources, a machining accuracy control system included dimensional variation model, Multivariate Statistical Process Control （MSPC） and error source diagnosis was put forward to provide technical basis for multi-stage digital manufacturing of meso-scale parts. Through analyzing the characteristics of meso-scale part in manufacturing, the machining errors model caused by workpieces deformation and tool deformation based on micro cutting scale effect was proposed, and the deviation state space model of meso-scale parts＇ dimensional error was constructed. A quality monitoring strategy with combination of variation model and MSPC and an error resource diagnosis method were raised to achieve the diagnosis of error and the control of machining accuracy. The effectiveness and feasibility of the model were proved by milling micro grooves in the stainless steel part.