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Pressure-Relief Impact Control of Open Circuit Hydraulic Pump-Controlled Forging Press System

1
School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China
2
School of Mechanical Engineering, Nanjing Institute of Technology, Nanjing 211167, China
*
Author to whom correspondence should be addressed.
Processes 2019, 7(9), 638; https://doi.org/10.3390/pr7090638
Received: 5 September 2019 / Revised: 11 September 2019 / Accepted: 11 September 2019 / Published: 19 September 2019
(This article belongs to the Section Materials Processes)
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. View Full-Text
Keywords: open circuit hydraulic pump-controlled system; forging press; pressure-relief impact; combined pressure-relief curve (CPRC) open circuit hydraulic pump-controlled system; forging press; pressure-relief impact; combined pressure-relief curve (CPRC)
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MDPI and ACS Style

Cao, X.; Yao, J.; Sha, T.; Song, Y. Pressure-Relief Impact Control of Open Circuit Hydraulic Pump-Controlled Forging Press System. Processes 2019, 7, 638.

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