• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2016, Vol. 52 ›› Issue (10): 199-206.doi: 10.3901/JME.2016.10.199

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Energy Saving and Control of Hydraulic Press Fast Forging System Based on the Two-stage Pressure Source

YAO Jing1, 2, 3, LI Bin3, KONG Xiangdong1, 2, 3   

  1. 1. Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, Yanshan University, Qinhuangdao 066004;
    2. National and Local Joint Engineering Center for Advanced Forging Press Forming Technology and Equipment, Yanshan University, Qinhuangdao 066004;
    3. School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004
  • Online:2016-05-15 Published:2016-05-15

Abstract: The poor energy efficiency is a big issue in the conventional electro-hydraulic proportional valve controlled fast forging system due to the huge throttling losses and overflow losses. Aimed to address this problem, the energy flow distribution of fast forging process is obtained by adopting the load force and velocity analysis method of duty cycle. Through analyzing the energy flow of the different actuators, at the same time considering the load match of the different actuators and energy storage and regeneration, a novel energy-saving fast forging system schematic of two-stage pressure source is proposed. The rules of two-stage pressure’s parameters design and match are formulated, giving the key components model and parameters computing method. Adopting the method of power band graphs, the mathematical model of fast forging system based on two-stage pressure is found to simulate and analyze the power flow. In order to validate the control and energy- saving characteristics, the test is carried on using the 0.6 MN hydraulic forging press platform and the results show that the displacement control precision of this new system based on two-stage pressure source is 1.5 mm and the useful work rate of the new system is improved to 24.4%. What is more significant is that compared with the traditional electro-hydraulic proportional valve controlled system and fast forging hydraulic press with accumulator system, this new system not only greatly reduces the installed power and throttling loss, but also makes zero overflow possible.

Key words: accumulator, energy-saving, forging hydraulic press, two-stage pressure source

CLC Number: