Invention Grant
- Patent Title: Die cushion drive and method for operating a die cushion drive
- Patent Title (中): 模具缓冲驱动装置及其运行方式
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Application No.: US14039698Application Date: 2013-09-27
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Publication No.: US09346095B2Publication Date: 2016-05-24
- Inventor: Frank Knoche , Johannes Kurz , Oleg Schlegel , Stephan Schäufele
- Applicant: Siemens Aktiengesellschaft
- Applicant Address: DE München
- Assignee: SIEMENS AKTIENGESELLSCHAFT
- Current Assignee: SIEMENS AKTIENGESELLSCHAFT
- Current Assignee Address: DE München
- Agency: Henry M. Feiereisen LLC
- Priority: EP12186610 20120928
- Main IPC: B21D22/00
- IPC: B21D22/00 ; B21D24/02 ; B21D24/14

Abstract:
A die cushion drive includes a first pump, operated by a first electrical machine and at least one hydraulic cylinder having first and second chambers, with the first chamber in fluid communication with the first pump. A die cushion mechanically connected to the hydraulic cylinder. During a controlled movement of the die cushion, a pressure regulation and a preliminary control are active, with a second pump being coupled to a second electrical machine. During preliminary control, the second electrical machine is operated as a generator, with a first valve being used as an adjustment element of the pressure regulation.
Public/Granted literature
- US20140090441A1 DIE CUSHION DRIVE AND METHOD FOR OPERATING A DIE CUSHION DRIVE Public/Granted day:2014-04-03
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