Research On The Structure Design And Dynamic Performance Optimization Of The High Speed Transportation Manipulators In Hot Stamping Production Line

With the increasingly high demand for lightweight of automobile, the technology of high strength steel hot stamping develops gradually. In the hot stamping production line, the high strength steel blank needs to be heated to above 930 oC and then completes stamping deformation. The speed and time of the blank conniving from the furnace to the die have great impact on the sharp decline of the temperature of the blank, thus it has great influence on the tact and part quality. Cartesian coordinates robot is been adopted in the hot stamping production line for its simple and fast movements. The high speed transportation has a higher requirement to the efficiency, the speed, the continuity, the stability of the manipulators and the interoperability of the work between the manipulators. And it will be the base of the research on how to implement the intelligent transportation in production line.The rapidity requires the robots delivery the blank with the fastest speed. In the paper, the research is based on the current production test line. Focusing on the problems of the line, through establishing the trajectory equation of each robot, optimize some structures of the robots, finally, the delivery time of the hot blank shortens from 9.5s to 6.7s, and the tact shortens from 24 s to 16 s.The stability is an important indicator to ensure the production smooth, continuous and safe. It is the research about displacement accuracy of the manipulator end, and it always be evaluated by the vibration performance of the manipulator end. In the research, the manipulator is simplified as a cantilever beam model based on its geometry. Then establish its vibration equation, through parametric analysis, finite-element analysis and dynamics simulation, and combine with experiments under working conditions, finally, the manipulator structure is optimized, and the vibration amplitude of the manipulator is decreased.The results show that, through the optimization of the structures of the manipulators, the Cartesian coordinates robots can adapt the transportation in the hot stamping production line with high efficiency and high part quality.