Synchronous control method for load-deflection resistance of servo pump

Abstract

The invention provides a synchronous control method for load-deflection resistance of a servo pump. Under synchronous control of the servo pump of a servo oil press, a flow pressure dead zone is compensated, oil pressure characteristic function and oil pressure compensation gain values are designed, a synchronous offset threshold value and a pressure threshold value are set, practical synchronousoffset and practical system pressure are used as input for real-time judgment, when an absolute value of the practical synchronous offset is larger than the synchronous offset threshold value and it is judged that the system pressure is smaller than the pressure threshold value, oil pressure characteristic compensation is carried out on control output of an oil pressure cylinder, if not, the oil pressure characteristic compensation is not carried out on control output of the oil pressure cylinder, and synchronous control is carried out according to an originally decided synchronous control method. According to the compensation synchronous method combining with the oil pressure characteristics, the synchronous performance problem in the multi-cylinder synchronous pressing process and especially at an initial contact workpiece segment is solved, the load-deflection influence is overcome, the system synchronous performance is further improved, the workpiece quality is ensured, meanwhile,a mould is protected, the machining quality is improved, machine tool abrasion is reduced, and the life cycle of equipment is prolonged.

Description

technical field [0001] The invention belongs to the technical field of forging press manufacturing, relates to multi-pump synchronous control of a servo hydraulic press, and relates to a synchronous control method for anti-eccentric load of servo pumps. Background technique [0002] In the forging and pressing manufacturing industry, with the increase in the complexity of the forming process, the requirements for the tonnage and performance of the machine tool are becoming more and more stringent, and the eccentric load processing has become an indispensable process. The form of servo pump control has gradually become the mainstream of the market due to its outstanding advantages of energy saving and noise reduction, and often overcomes the disadvantage of low displacement of a single pump by means of multi-pump combination. Presses or injection molding machines and other equipment, and get good market feedback. [0003] The method of multi-pump combination will inevitably ...

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Problems solved by technology

[0005] The problem to be solved by the present invention is: for the multi-cylinder synchronization control scheme of the servo pump, the prior art does not consider the oil pressure characteristics in the pump control system, and the synchronization performance of the initial contact workpiece section cannot be guaranteed

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