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复杂产品加工的高精度导致了其加工过程的多工序性。当复杂产品在多个工序间进行加工时,其加工误差会在工件上传递并累加。由于其高精度要求,导致引起几何加工误差的过程参数较之一般的多工序加工过程来说更多,误差产生的形式更多样,为了对复杂产品加工误差传递过程进行描述,采用机器人运动学中的微分运动矢量来描述工件和夹具,采用齐次坐标变换来得到其在不同工序间的位置关系。在此基础上,建立了复杂产品加工过程误差传递的物理模型,详细论述了该模型的建立过程,并对所建模型的有效性进行了验证。该模型为复杂产品质量控制与改进研究中的故障诊断、误差源识别、传感器安放位置优化、误差仿真和加工参数及夹具优化设计等提供了理论基础。
The high precision of complex product processing has led to the multi-process of its processing. When complex products are processed in more than one process, the machining errors are transferred and accumulated on the workpiece. Due to its high precision requirements, the process parameters that cause the geometric machining errors are more than those of the normal multi-machining process, and the errors are more diverse. In order to describe the machining error transfer process of complex products, the robot kinematics In the differential motion vector to describe the workpiece and fixture, using homogeneous coordinate transformation to get its position in the different processes. On this basis, the physical model of error transmission in complex product process is established. The establishment process of the model is discussed in detail, and the validity of the model is verified. The model provides the theoretical basis for fault diagnosis, error source identification, sensor placement optimization, error simulation and processing parameters and fixture optimization design in the research of complex product quality control and improvement.