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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
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Adjustable clamping force control system based on PLC
CUI Yuqing, JIANG Zhaoliang, YI Wei
(Key Laboratory of Highefficiency and Clean Mechanical Manufacture, Shandong University, Jinan 250061, China)
Abstract: In order to solve the problems of deformation control of thin part milling with optimal clamping force, a hydraulic fixture with adjustable clamping force online(HFAC) was designed based on PLC technology. The HFAC system was composed of clamping mechanism, hydraulic system and control mechanism. The realtime closedloop control of PLC was used to adjust the outlet pressure of the electrohydraulic proportional pressure reducing valve, the highprecision clamping force was obtained and the automatic control function of pressure on line was realized. The test results show that, the HFAC system can realtime adjust the clamping force under the machining requirements, and the control precision of clamping force is about 3%,namely it has good stability and higher control precision of clamping force.
Key words: hydraulic fixture with adjustable clamping force online(HFAC); deformation control; PLC