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1. IN10309/DELNP/2008 - METHOD OF OPERATING A HYDRAULIC PRESSING UNIT, AND HYDRAULIC PRESSING UNIT HAVING A HYDRAULIC PUMP

Office India
Application Number 10309/DELNP/2008
Application Date 12.12.2008
Publication Number 10309/DELNP/2008
Publication Date 20.03.2009
Grant Number 277913
Grant Date 09.12.2016
Publication Kind B
IPC
B21J 15/20
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
15Riveting
10Riveting machines
16Drives for riveting machines; Transmission means therefor
20operated by hydraulic or liquid pressure
Applicants GUSTAV KLAUKE GMBH
Inventors EGBERT FRENKEN
Priority Data 10 2006 026 552.1 08.06.2006 DE
Title
(EN) METHOD OF OPERATING A HYDRAULIC PRESSING UNIT, AND HYDRAULIC PRESSING UNIT HAVING A HYDRAULIC PUMP
Abstract
(EN)
The invention relates firstly to a method of operating a hydraulic pressing and (1) wherein a motion part (7) is moved into a pressing position by the build up of a hydraulic pressure which results from the filling of a hydraulic space (6) with hydraulic medium from a supply space (5) wherein furthermore the motion part (7) is designed to move back automatically from the pressing position into an end position under the effect of a return spring (15), and the non return valve (16) is designed to close only after the pressure drops below a certain pressure acting on the non return valve (16) due to the hydraulic medium running back, and furthermore to such a hydraulic pressing unit (1) In order to specif) a method which enables the motion part to be optionally stopped in a position, it is proposed that, in order to have an effect on the hydraulic medium upstream of the non return valve (16), said hydraulic medium flowing when the latter is open, means (25) are provided which counteract the flow of the hydraulic medium in such a way that a pressure drop which occurs leads to the displacement of the non return valve (16) into the closed position In concrete terms, an improvement from the manipulation point of view, is achieved in that means (25) are provided which act on the flow of the hydraulic medium in the sense of a pressure drop it such a way that the non returria nature valve (16) moves into the closed position.