Virtual Prototyping Simulation Of Flexible Multi-Point Auxiliary Support Fixture For Blade Machining

Due to its thin-walled structure, light weight, high structural efficiency, high reliability and so on, space freeform surface blade has been widely applied to aerospace manufacture. However, because it deforms in machining process and it is difficult to be processed, its use is limited to some extent. Therefore, digital multi-point positioning flexible tooling system becomes one of the key topics for the development of the space freeform surface thin-walled blade.Firstly, the background of the subject, purpose and meaning, domestic and foreign research status and development trends of multi-point positioning of flexible systems are described. The key technologies to realize the flexibility and automation of the flexible tooling system are analyzed. Aiming at the positioning difficulty of the flexible tooling system, the research objective and contents are proposed.Secondly, based on space freeform surfaces theories and methods, several positioning point solving methods on the freeform surfaces are studied. According to the processing requirements of a machine, its transmission scheme is determined and its structural design is completed using three-dimensional SolidWorks software. Through the stress analysis of standard parts of the flexible tooling system, the standard parts are determined.Thirdly, the three-dimensional model of the flexible tooling system is imported into ADAMS. After checking and modifying the system’s units and gravity, modifying part names and materials, and adding constraints and loads, its multi-body dynamic simulation is carried out. The displacement, velocity and acceleration of each positioning columns are obtained. The simulation results validate the correctness of the model.Finally, the conclusions are drawn and further researches are presented.