Dissertation > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > High-energy forming

Research for Model and Control Strategy of Electro-Hydraulic Control System of Internal High-Pressure Forming Equipment

Author ChenLiYu
Tutor LiuLi
School Shanghai Jiaotong University
Course Mechanical and Electronic Engineering
Keywords Hydroforming Position synchronization control High pressure seal Modeling and Simulation
Type Master's thesis
Year 2007
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In aircraft , spacecraft and automotive fields , reduce weight , save material is the long-sought goal , but also one of the modern trend of advanced manufacturing technology development . Hydroforming It is in this context that developed the new technology of a liquid pressure to the workpiece molding plastic processing . Analysis hydroforming process based on combination the Hydroforming design requirements and technical parameters of the machine proposed hydroforming Electrohydraulic Proportional electro-hydraulic proportional valve core control system program . Then the contralateral cylinder electro-hydraulic proportional control system modeling and design calculations , the theoretical basis for the establishment of control methods and control algorithms . On this basis , the incremental PID controller . Two control strategies used in the synchronization system at the same time ( \Proposed the combined use of the two control position synchronization system dynamic and static quality . And computer simulation , signal response curves obtained theoretically . In order to verify the theory and simulation analysis is correct . Including Hydroforming hydraulic machine displacement control and load the thrust control test from the test results , the the Hydroforming hydraulic Hydromechatronics proportion control system to meet the design requirements of the system . Hydroforming hydraulic press machine by the Body Institute acceptance of Shanghai Jiaotong University , and is currently in good condition .

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