| Along with the continuous development of the aviation industry and auto industry,the world energy is shortage. In order to save energy and raw materials in the industry, thelightweight structure of the products become the continuously pursued goal by themanufacturing. In this case, the internal high-pressure forming technology that ischaracterized by lightweight and structure of the integration is a developing direction andthe research hot spot at home and abroad.In order to meet the requirements of the domestic internal high-pressure formingtechnology, and avoid damaging mold and wasting energy for internal high-pressureforming system always working under maximum tonnage, this paper put forward on thedesign requirements of the variable clamping force about the hydraulic system of theinternal high-pressure forming press.Firstly, according to the work requirements of the internal high-pressure formingpress, this paper designed the hydraulic system of the50MN internal high-pressureforming press, and made a selection for the key components of the hydraulic system.Secondly, establishing the model of hydraulic system of the internal high-pressureforming press with AMESim and carrying on simulation analysis. the models of servovalve, electro-hydraulic proportional cartridge valve and constant pressure variable pumpwere established by using AMEsim and the dynamic and static simulation analysis wascarried on. According to the requirement of the system control accuracy, this paperdesigned the control strategy. On the basis of adding the control strategy, the hydraulicsystem was analyzed in the simulation by using the AMEsim.Finally, about the variable clamping force close loop control of the short strokecylinder SSC system and position open loop control of the long stroke cylinder systemwere simulated experiment. The experiment results shows that system meets the demandof working, and the design of hydraulic system and control strategy is correct. |
