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《China Mechanical Engineering》 2016-02
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Research on Energy Saving of Pressure and Displacement Compound Control Strategy for Fast Forging System

Yao Jing;Cao Xiaoming;Li Bin;Kong Xiangdong;Zhou Fang;Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control;Key Laboratory of Advanced Forging & Stamping Technology and Science,Ministry of Education of China;Yanshan University;  
According to the problems of constant pressure output,return cylinder's large pressure and low transmission efficiency in fast forging process of forging hydraulic press' s ordinary electrohydraulic proportional valve system,this paper proposed a pressure and displacement compound control strategy,and took pressure control for the return cylinder's back-pressure cavity and load sensitive control for the pump's inlet pressure under the premise of ensuring the control precision.The energy-saving mechanism was studied and the two important factors-the return cylinder's back-pressure cavity pressure pband the pressure differenceΔpbetween pump outlet and the working cavitythat influenced the effect inveness of energy saving were analyzed through establishing the complete mathematical model for hydraulic press' s pressure and displacement compound control.Experimental results show that the position error for loading can limit 1.5mm based on the fast forging hydraulic press' s pressure and displacement compound control system,and installed power reduced to 52.3%compared to the traditional electro-hydraulic proportional valve control system,meanwhile power consumption is reduced to 49.2% compared to ordinary proportional valve system.
【Fund】: 国家自然科学基金资助项目(51575471);; 河北省青年自然科学基金资助项目(E2014203247);; 高档数控机床与基础制造装备科技重大专项(2011ZX04001-51-04)
【CateGory Index】: TG315.4
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【Secondary Citations】
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