Parallel multi-loop multi-point partition voltage regulation deep drawing numerical control hydraulic cushion system

By using a parallel multi-circuit multi-point zone pressure regulating deep stretching CNC hydraulic cushion system, the mechanical energy of high-pressure oil is stored in an accumulator and combined with multi-point servo digital control, the problems of energy waste and control accuracy in hydraulic cushion systems are solved, achieving efficient pressure and position control and reducing system costs.

CN116037752BActive Publication Date: 2026-06-09ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Filing Date
2023-02-07
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Traditional hydraulic press hydraulic cushion systems suffer from significant energy waste during the stretching process, and the oil heating makes precise control difficult. Furthermore, the pressure and position control accuracy is poor and is greatly affected by external conditions such as oil temperature.

Method used

A parallel multi-circuit multi-point zone pressure regulating deep drawing CNC hydraulic cushion system is adopted. It utilizes an accumulator to store the mechanical energy of excess high-pressure oil and outputs it during the lifting process of the hydraulic cushion. Combined with multi-point servo digital control, it realizes precise pressure regulation of multi-point and multi-segment pressing force.

Benefits of technology

Reduce heat generation in the hydraulic system, lower the power and displacement of the hydraulic cushion lifting pump unit, improve pressure and position control accuracy, and reduce costs.

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    Figure CN116037752B_ABST
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Abstract

The application discloses a kind of parallel multi-loop multi-point partition voltage regulation deep-drawing numerical control hydraulic cushion system.In the application, the upper die is arranged with the slider and the lower die and the workbench in an up-down interval, the workpiece is placed between the upper die and the slider and the lower die and the workbench, the upper die and the slider are connected with the crank slider system, the angular velocity sensor is connected with the crank slider system, the output ends of the plurality of hydraulic cushion cylinders are connected with the lower surface of the lower die and the workbench, the plurality of hydraulic cushion cylinders are connected with the hydraulic cushion control module, the displacement sensor is connected with the lower die and the workbench, and the displacement sensor and the hydraulic cushion control module are connected with the motion controller.The application designs a parallel hydraulic circuit based on multiple independent cylinders, solves the nonlinear system problems such as turbulent flow, friction, valve port overlap and other nonlinear system problems in the main valve port of the servo control system, develops a multi-point servo digital control hydraulic cushion system, and realizes multi-point multi-segment staged pressure control.
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