Cite the paper
Mechanics, Materials Science & Engineering, 13 , 2017, ISSN: 2412-5954.
Authors: Guodong Yi, Peng Zhang
ABSTRACT. Fine-blanking is an efficient and precise machining method. The hydraulic control system of the fine-blanking press has an important influence on the forming efficiency and accuracy of the part. The paper puts forward an analysis and optimization methods of the control system for velocity stability. A hydraulic control system model is established and the main parameters of blanking process such as blanking force, blank holder force and counter force were calculated and analyzed. According to the velocity changes of the master cylinder with open-loop control in blanking process, the causes and effects of each change point and the variation characteristics of load, acceleration and displacement of master cylinder are elaborated. The velocity changes with closed-loop control based on velocity and position feedback are described and compared with that of the open-loop control. Based on the comparative analysis, the influences of the system and components on the velocity are studied, and the open-loop control is selected as the control method of the fine-blanking press. The optimal control strategy for the steady velocity of main cylinder is proposed with the automatic optimization algorithm and the simulation results.
Keywords: hydraulic fine-blanking press, open-loop control, closed-loop control, optimization, simulation
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