Press drive comprising two working areas

US11141945B2 · kind B2 · utility

Assignee

• SCHULER PRESSEN GMBH · DE

Inventors

• Rainer Hedler · Erfurt, DE
• Marcus Kosse · Bad Boll, DE
• Joachim Beyer · Ravensburg, DE

Key dates

• Filing date: Jan 19, 2020
• Grant date: Oct 12, 2021
• Expiry date: Mar 24, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B30B1/268
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a press drive for a press or a press having a press drive. The invention also relates to a method for controlling the press drive by means of a control unit. The press drive is used for moving a ram of the press in a stroke direction H between an upper return point OT and a lower return point UT. It comprises a knee lever gear having a first lever and a second lever. A connecting rod engages on the knee lever of the two levers and is connected on the other end to an eccentric of an eccentric drive. The control unit can drive the eccentric drive in a first operating mode B1 or a second operating mode B2 or, in particular, also a third operating mode B3. In the first and the second operating modes B1, B2, the eccentric oscillates in a respectively different angle region W1, W2 about a rotation axis D of the eccentric drive, thus resulting in different force and movement states of the ram in both operating modes.