关键词: 再制造, 装配过程;质量;公差带在线优化

Abstract:

To improve the assembly precision of remanufactured complex mechanical products and the utilization ratio of remanufactured parts, an online tolerance optimization approach for remanufactured complex mechanical product assembly processes was put forward. First, the tolerance zone of the key process was divided into several zones with fine granularity based on the analysis of remanufactured complex mechanical product assembly characteristics. Second, under dimensional chain constraints, based on genetic algorithm an online tolerance optimization model was established with the minimum quality loss and comprehensive cost as target. Then a forward inference mode based on historical data and an backward inference mode based on the real-time assemble information were proposed respectively, which can dynamically deduce the optimal assembly scheme set guiding the remanufacturing assembly process and timely response to the abnormal. Finally, an online quality control prototype system for the remanufactured engine assembly in a power corporation remanufacturing assembly line was developed, which shows the feasibility and validity of the proposed strategy.

Key words: remanufacturing, assembly process, quality, online tolerance optimization