Title:
METHOD FOR COMBINED CONTROL OF SPEED AND PRESSURE OF ORBITAL HYDRAULIC PRESS
Document Type and Number:
WIPO Patent Application WO/2021/022682
Kind Code:
A1
Abstract:
Disclosed is a method for combined control of the speed and the pressure of an orbital hydraulic press. A hardware system mainly comprises: a displacement sensor (1), used to measure displacement of a piston of a master cylinder; a master cylinder (2), used to provide thrust to drive a slider and a ram; a first pressure sensor (3), used to measure the pressure of an action chamber of the master cylinder; a proportional control valve (4), used to adjust the rate of a flow entering the action chamber of the master cylinder; a second pressure sensor (5), used to measure the pressure of a constant-pressure oil source (6); a constant-pressure oil source (6), used to provide a constant-pressure hydraulic oil source; and a controller (7), used to acquire signals of the displacement sensor (1), the first pressure sensor (3), and the second pressure sensor (5), perform control and calculation, and transmit a control instruction signal to the proportional control valve (4). Speed control and pressure control of the orbital hydraulic press are combined by means of a least absolute value algorithm used for the control signal, thereby achieving automatic planning of a control target and smooth switching between control modes, and reducing difficulties in coordination between speed control and pressure control in an orbital forming process.
Inventors:
XIONG YI (CN)
Application Number:
PCT/CN2019/113194
Publication Date:
February 11, 2021
Filing Date:
October 25, 2019
Export Citation:
Assignee:
NANTONG METALFORMING EQUIP CO LTD (CN)
International Classes:
F15B11/02
Foreign References:
| CN108131364A | 2018-06-08 | |||
| CN106438585A | 2017-02-22 | |||
| CN104819175A | 2015-08-05 | |||
| CN103883588A | 2014-06-25 | |||
| US20180128292A1 | 2018-05-10 | |||
| EP3378827A1 | 2018-09-26 |
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