Invention Grant
- Patent Title: Control of hydraulic actuating cylinders in roll stands
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Application No.: US17425315Application Date: 2020-01-23
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Publication No.: US11448239B2Publication Date: 2022-09-20
- Inventor: Michael Zielenbach , Jörn Sohler , Peter Horn , Martin Schmidt
- Applicant: SMS group GmbH
- Applicant Address: DE Düsseldorf
- Assignee: SMS group GmbH
- Current Assignee: SMS group GmbH
- Current Assignee Address: DE Düsseldorf
- Agency: Smartpat PLC
- Priority: DE102019201043.1 20190128
- International Application: PCT/EP2020/051692 WO 20200123
- International Announcement: WO2020/156932 WO 20200806
- Main IPC: B21B35/00
- IPC: B21B35/00 ; F15B21/08 ; F15B11/10 ; G05B19/042

Abstract:
A hydraulic control loop controls a hydraulic adjusting cylinder. The cylinder has a cylindrical housing and a displaceable piston therein. The piston divides the housing interior into a first and a second hydraulic chamber. A first hydraulic valve supplies the first hydraulic chamber with hydraulic fluid. A hydraulic pressure of the first hydraulic chamber is adjustable by controlling the first hydraulic valve. A second hydraulic valve supplies the second hydraulic chamber with hydraulic fluid. A hydraulic pressure of the second hydraulic chamber is adjustable by controlling the second hydraulic valve. A control device controls the two hydraulic valves. In a position control state, the second hydraulic valve is controlled by a position control signal dependent on the working position of the piston and the first hydraulic valve is controlled by an adjusted position control signal, that is generated on the basis of the position control signal.
Public/Granted literature
- US20220082115A1 Control of hydraulic actuating cylinders in roll stands Public/Granted day:2022-03-17
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