Abstract
Taking the open circuit hydraulic pump-controlled forging press system as the research object, according to the problems of pressure-relief impact of this system, the pressure-relief rules, mathematic models of the energy release rules, and the flow release rules were established, and the pressure-relief performance in different stages of each pressure-relief curve was analyzed. Based on the different requirements of the pressure gradient decrease, the combined pressure-relief curve (CPRC) was proposed to realize variable-pump eccentric magnitude planning. An experimental study on the pressure-relief process with CPRC was carried out. The results show that the pressure fluctuation of the pressure-relief pipe was reduced and the suppression effect of pressure-relief impact was better than that of the single regular pressure-relief curve. When the initial pressures were 10 MPa and 15 MPa, the pressure impact of the pressure-relief tube decreased by 45.45% and 37.5%, respectively, which realized the smooth pressure relief of the main cylinder.
Highlights
The forging hydraulic press is a key piece of equipment in heavy machinery and plays a pivotal role in the machinery manufacturing industry
The transmission forms of the forging hydraulic press system are mainly divided into two types: valve-controlled and pump-controlled
We propose an Open Circuit Pump-controlled Asymmetric Cylinder System (OCPACS) to address compensation method for the pressure-impact prediction of the directional valve [21,22], using the the above issues, and we apply it to the forging hydraulic press system
Summary
The forging hydraulic press is a key piece of equipment in heavy machinery and plays a pivotal role in the machinery manufacturing industry. We propose an Open Circuit Pump-controlled Asymmetric Cylinder System (OCPACS) to address compensation method for the pressure-impact prediction of the directional valve [21,22], using the the above issues, and we apply it to the forging hydraulic press system. We studied the control valve to solve these problems, this paper studies the pressure-relief impact control of the OCPFHS, characteristics [11], energy consumption characteristics [12], control coupling characteristics [13,14], puts forward the combined pressure-relief curve (CPRC), and deduces the mathematical model of accumulator fast-forging circuit-control characteristics and their influencing factors [15], and long. All the energy needs to be released the oil in the cylinder andproposing pipelines during the compensation method for the pressure-impact prediction of the directional valve [21,22], using the pressure-relief process [25].
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