The Metal Bellows Rigid Mould Efficient Inflationary Pressure Forming Process Control Research

The inflationary pressure forming processing of rigid mould is an important efficient U-shaped metal bellows processing method. But as the precision requirement of U shape metal bellows is continuous improved, the inflationary pressure forming processing of rigid mould can’t meet it. The U-shaped metal bellows’shaped processing through of rigid mould be realized and the processing accuracy be ensured are this paper’s goal. Processing precision in efficient rigid mould inflationary pressure processing method of U-shaped metal bellows is researched.(1) HJ-500mechanical inflationary pressure bellows forming machine is taken as research platform to analyze the impact of efficient forming factors, influence law of these factors to the accuracy of forming are revealed, that the implementation of shaping based on the efficient processing of high-precision control of are cleared;(2) The processing characteristics of the corrugated pipe forming machine is analyzed, the system load resistance characteristics of the law is cleared, when increasing the mechanical transmission system to improve the processing speed by adjusting the drive cone angle; Different thickness of the tube to squeeze pressure process is emulated by the finite element software LS-DYNA, The die resistance variation in the extrusion process is analysized, and thus the matching speed of processing of different thickness of the bellows is determined and the springback of bellows is calculated when squeeze uninstalled, The value of the processing parameters based on high-precision molding is drew;(3) Efficient forming system control program is developed, machine power system mathematical model is formed, the variation of processing parameters based on analysis is derived, the precision control system under load interference is clear maked;(4) For the problems of the time-varying, nonlinear of parameters in the corrugated pipe forming machine system, S function is wrote by using the Simulink software, Exponential reaching law fuzzy adaptive sliding mode controller is designed, and the revised system control error is determined by carrying out simulation analysis, the position control system is maked sure that having a good control accuracy after controllers compensate the control error.