EP0830221B1 - Unite hydraulique multiplicatrice de pression, notamment pour une presse fonctionnant selon le procede d'extrusion a haute pression interieure - Google Patents

Unite hydraulique multiplicatrice de pression, notamment pour une presse fonctionnant selon le procede d'extrusion a haute pression interieure Download PDF

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Publication number
EP0830221B1
EP0830221B1 EP96921949A EP96921949A EP0830221B1 EP 0830221 B1 EP0830221 B1 EP 0830221B1 EP 96921949 A EP96921949 A EP 96921949A EP 96921949 A EP96921949 A EP 96921949A EP 0830221 B1 EP0830221 B1 EP 0830221B1
Authority
EP
European Patent Office
Prior art keywords
docking
piston rod
piston
hydraulic pressure
boosting unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96921949A
Other languages
German (de)
English (en)
Other versions
EP0830221A1 (fr
Inventor
Manfred Breckner
Peter Kirmair
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Rexroth AG
Original Assignee
Mannesmann Rexroth AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mannesmann Rexroth AG filed Critical Mannesmann Rexroth AG
Publication of EP0830221A1 publication Critical patent/EP0830221A1/fr
Application granted granted Critical
Publication of EP0830221B1 publication Critical patent/EP0830221B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/32—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure

Definitions

  • the invention is based on a hydraulic pressure intensifier unit, especially for one after the hydroforming process working press that the Features from the preamble of claim 1.
  • Such a hydraulic pressure intensifier unit is e.g. from the DE-GM 18 85 909 or known from DE 43 12 589 A1.
  • the docking cylinder has a docking piston, to which a docking piston rod is attached, which, seen from the primary piston of the pressure booster, through a housing head located beyond the docking piston outside occurs.
  • Docking piston and docking piston rod are with one central bore into which the secondary piston of the pressure intensifier immersed.
  • the docking piston also carries on his a side facing the primary piston of the pressure booster Piston rod, which is also drilled lengthways.
  • At the pressure intensifier unit according to the utility model enters this second piston rod of the docking piston through a housing base outward.
  • the second piston rod dips of the docking cylinder only in the bottom of the case.
  • the docking cylinder first has the task of the blank which is usually a piece of pipe, closed to keep. In addition, it comes to him in many forming processes Function to axially feed material of the blank during forming.
  • the aim of the invention is a hydraulic one Pressure intensifier unit with the features from the preamble of Claim 1 to further develop that with the docking cylinder greater forces can be exerted than before and that a shorter construction is possible.
  • a hydraulic pressure intensifier unit with the features the preamble of claim 1 according to the characterizing part this claim the docking piston has a piston rod on one side only owns.
  • the Inner diameter of the one on the opposite side of the docking piston rod Ring surface located on the side of the docking piston the outside diameter of the secondary piston of the pressure intensifier.
  • the ring surface is thus compared to the known hydraulic Pressure intensifier units enlarged so that without an enlargement of the outer diameter of the docking piston and without an increase a greater force is exerted by the acting pressure can.
  • the unit is now also shorter because of the first cylinder space and the second cylinder chamber are moved closer together can.
  • the subclaims contain advantageous configurations of a hydraulic pressure intensifier unit according to the invention, which itself on the sealing of different pressure rooms against each other and obtain the drainage of leakage fluid.
  • Pressure intensifier unit is schematic in the drawings as a whole and shown in detail with the structural details. The invention is illustrated by the figures in these drawings now explained in more detail.
  • the hydraulic pressure intensifier unit shown comprises one Docking cylinder 10, a pressure intensifier 11 and a rapid traverse cylinder 12 for the pressure translator 11.
  • the in terms of their Functionally named parts cannot be clearly identified locally separate from each other, but are in one compact unit integrated.
  • To the housing 13 of the unit belongs to the Docking cylinder 10 and the pressure intensifier 11 common, one-piece Housing middle part 14, which has a first cylinder space 15 and has a second cylinder space 16.
  • the two cylinder rooms 15 and 16 are open on opposite sides and separated from one another by a base 17 of the middle part 14 of the housing, from which the cylinder jackets 18 and 19 of the two Cylinder rooms extend in opposite directions.
  • Of the first cylinder chamber 15 is with a housing head 20 and second cylinder chamber 16 closed with a housing head 21.
  • the first cylinder space 15 belongs to the docking cylinder 10.
  • a docking piston 25 axially displaceable only on one side has a piston rod attached to it.
  • On its free end is screwed on a flange 27, with which a to be formed tubular blank 37 can be closed.
  • a central bore 28 extends axially through the docking piston 25 and through the docking piston rod 26, whereby this bore has a section 29 with a smaller diameter and has a portion 30 with a larger diameter. The latter extends from the end face facing the flange 27 the docking piston rod 26 up to a radial shoulder 31, which even with the maximum retracted docking piston rod 26 has an axial distance from the housing head 20.
  • the primary piston 40 is Pressure intensifier 11, the cylinder chamber 16 in the two Divides subspaces 16a and 16b, displaceable.
  • the one essential smaller diameter than the primary piston 40 having secondary pistons 41 of the pressure intensifier 11 projects like a piston rod from one side of the primary piston 40, passes through the bottom 17th of the housing middle part 14 and dips into the central one Bore 28 of the docking piston 25 and the docking piston rod 26 reaching into the bore section 30.
  • the level 31 in the bore 28 is from the free end of the docking piston rod 26 in no phase of a work cycle of the pressure intensifier unit run over.
  • the free end of the secondary piston 41 is located that is, axially always outside the housing head 20.
  • the primary piston 40 of the pressure booster 11 can through the the cylinder jacket 19 channels 52 and 53 alternately be pressurized on both sides.
  • a pressure medium Hydraulic oil used as a pressure medium Hydraulic oil used.
  • the seal settles 69 corresponding to the two possible directions of movement between the docking piston rod 26 and the secondary piston 41 two axially spaced sealing rings 80 and 81 together.
  • the other seals recognizable in FIG. 1 can each be composed of several sealing rings.
  • a leak line leads between the two seals 69 and 70 71 for the hydraulic fluid coming from the section 30 the bore 28 leaks from seal 70, across the docking piston rod 26 outwards.
  • Another leak line 72 is located also in every position of the docking piston rod 26 in front of the housing head 20, goes across the docking piston rod 26 through and opens between the two seals 68 and 69 in section 29 of bore 28. About it Hydraulic oil discharged that leaks through the seal 68.
  • Both leak lines 71 and 72 are each through a hole formed by a flat 82 of the docking piston rod 26 going out.
  • the mouth openings of the two holes in the flat 82 are located in the same radial plane 83 of the docking piston rod 26 and have a distance from each other that smaller than the diameter of section 29 of the central bore 28 in the docking piston rod 26. From the mouth openings bores 71 and 72 run axially in opposite directions Slanted directions, in a projection onto the radial plane 83 however parallel to each other inwards and out on opposite sides of the seal 69 in the bore 28.
  • the channel 47 and subspace 44b Rapid piston 45 pressurized and pushes the Secondary piston 41 of the pressure intensifier 11 deeper into the bore 28 in. Because a maximum pressure in channel 47 is not exceeded can be, is a shift with the help of the rapid traverse piston 45 of the secondary piston 41 only up to a certain pressure level possible in the blank to be formed. From this pressure onwards in addition to the rapid traverse piston 45 the primary piston 40 des Pressure intensifier 11 pressurized via the channel 52.
  • the docking piston 25 be moved further to axially feed material of the blank.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Actuator (AREA)
  • Press Drives And Press Lines (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Claims (10)

  1. Une unité de multiplication de pression hydraulique, en particulier pour une presse travaillant selon le principe de moulage à haute pression intérieure, dotée d'un vérin (10) de calage, lequel présente un piston (25) de calage, pouvant être amené à coulisser dans une première chambre (15) de vérin, et une tige (26) de vérin de calage, solidaire avec le piston (25) de calage et émergeant vers l'extérieur au travers d'une tête (20) de corps, et dotée d'un multiplicateur (11) de pression, dont le piston (40) primaire se trouve dans une deuxième chambre (16) de vérin, laquelle est disposée de façon coaxiale par rapport à la première chambre (15) de vérin et est isolée par rapport à la première chambre (15) de vérin par un fond (17) de corps, et dont le piston (41) secondaire plonge dans un alésage (28) central du piston (25) de calage et de la tige (26) de vérin de calage, caractérisée en ce que le piston (25) de calage ne possède une tige (26) de vérin que d'un côté.
  2. Une unité de multiplication de pression hydraulique conforme à la revendication n° 1, caractérisée en ce que deux joints (69, 70 ; 68, 69), distants l'un de l'autre dans la direction axiale, sont disposés entre d'une part le piston (25) de calage et/ou la tige (26) de vérin de calage et d'autre part le piston (41) secondaire du multiplicateur (11) de pression, et qu'un canal (71, 72) de fluide de fuite menant vers l'extérieur prend naissance entre les deux joints, dans la fente située entre le piston (41) secondaire et le piston (25) de calage et/ou la tige (26) de vérin de calage.
  3. Une unité de multiplication de pression hydraulique conforme à la revendication n° 2, caractérisée en ce que le canal (71, 72) de fluide de fuite mène directement vers l'extérieur au travers de la tige (26) de vérin de calage et prend fin, de préférence dans la direction radiale, sur la périphérie de la tige (26) de vérin de calage.
  4. Une unité de multiplication de pression hydraulique conforme à la revendication n° 3, caractérisée en ce que, dans chacune de ses positions et dans chacune des positions de la tige (26) de vérin de calage, le piston (41) secondaire pénètre à l'intérieur de la tige (26) de vérin de calage au-delà de la tête (20) de corps, qu'un des joints (69 ; 70) se trouve à l'extérieur de la tête (20) de corps et que le canal (71, 72) de fluide de fuite est constitué à l'aide d'un alésage qui parcourt la tige (26) de vérin de calage de façon au moins approximativement perpendiculaire, ainsi que d'un forage aboutissant sur l'extérieur devant la tête (20) de corps.
  5. Une unité de multiplication de pression hydraulique conforme à une des revendications n° 2 à 4, caractérisée en ce que trois joints (68, 69, 70) distants l'un de l'autre dans la direction axiale sont disposés entre d'une part le piston (25) de calage et/ou la tige (26) de vérin de calage et d'autre part le piston (41) secondaire et qu'un canal (71, 72) d'évacuation du fluide de fuite vers l'extérieur prenne naissance de chaque côté du joint (69) central, dans la direction axiale.
  6. Une unité de multiplication de pression hydraulique conforme à la revendication n° 5, caractérisée en ce que les deux canaux (71, 72) de fluide de fuite prennent fin extérieurement sur la tige (26) de vérin de calage, dans un même plan radial de la tige (26) de vérin de calage et latéralement décalés l'un de l'autre.
  7. Une unité de multiplication de pression hydraulique conforme à la revendication n° 6, caractérisée en ce que les deux canaux (71, 72) de fluide de fuite prennent fin à l'extérieur de la tige (26) de vérin de calage, sur une surface (82) aplatie.
  8. Une unité de multiplication de pression hydraulique conforme à la revendication n° 6 ou n° 7, caractérisée en ce que le décalage latéral des canaux (71, 72) de fluide de fuite est inférieur au diamètre de l'alésage (28) central à l'intérieur de la tige (26) de vérin de calage et que les deux canaux (71, 72) de fluide de fuite ne parcourent la tige (26) de vérin de calage qu'en biais.
  9. Une unité de multiplication de pression hydraulique conforme à une des revendications n° 3 à 8, caractérisée en ce que une plaque (89), forée d'un alésage ou de plusieurs alésages (87, 88) au travers desquels sont prolongés le canal ou, le cas échéant, les canaux (71, 72) de fluide de fuite, est fixée à l'extérieur, dans la direction radiale, sur la tige (26) de vérin de calage.
  10. Une unité de multiplication de pression hydraulique conforme à une des revendications n° 2 à 9, caractérisée en ce que les joints (68, 69, 70) qui agissent entre d'une part le piston (25) de calage et/ou la tige (26) de vérin de calage et d'autre part le piston (41) secondaire sont disposés de façon stationnaire par rapport au piston (25) de calage ou, le cas échéant, à la tige (26) de vérin de calage.
EP96921949A 1995-06-09 1996-06-07 Unite hydraulique multiplicatrice de pression, notamment pour une presse fonctionnant selon le procede d'extrusion a haute pression interieure Expired - Lifetime EP0830221B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19521101A DE19521101A1 (de) 1995-06-09 1995-06-09 Hydraulische Druckübersetzereinheit, insbesondere für eine nach dem Innenhochdruckumformverfahren arbeitende Presse
DE19521101 1995-06-09
PCT/EP1996/002489 WO1996041692A1 (fr) 1995-06-09 1996-06-07 Unite hydraulique multiplicatrice de pression, notamment pour une presse fonctionnant selon le procede d'extrusion a haute pression interieure

Publications (2)

Publication Number Publication Date
EP0830221A1 EP0830221A1 (fr) 1998-03-25
EP0830221B1 true EP0830221B1 (fr) 1999-02-03

Family

ID=7764032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96921949A Expired - Lifetime EP0830221B1 (fr) 1995-06-09 1996-06-07 Unite hydraulique multiplicatrice de pression, notamment pour une presse fonctionnant selon le procede d'extrusion a haute pression interieure

Country Status (7)

Country Link
EP (1) EP0830221B1 (fr)
JP (1) JPH11509479A (fr)
AT (1) ATE176414T1 (fr)
CA (1) CA2224208A1 (fr)
CZ (1) CZ396097A3 (fr)
DE (2) DE19521101A1 (fr)
WO (1) WO1996041692A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9904464D0 (sv) * 1999-12-07 1999-12-07 Jan Ericson Med Firma J Tec Apparatus for generating hydraulic pressure
EP2298940B1 (fr) * 2009-08-25 2012-08-08 Felss Burger GmbH Dispositif d'auto-frettage pour composants haute pression, notamment pour conduites
FR2965247B1 (fr) * 2010-09-27 2012-09-28 Snecma Dispositif hydraulique de changement de pas d?helice

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1185437A (en) * 1968-09-09 1970-03-25 Masanobu Nakamura Bulging Apparatus.
CS188679B1 (en) * 1977-04-05 1979-03-30 Jindrich Spacek Facility for the hydromechanic drawing
BG39831A1 (en) * 1983-01-26 1986-09-15 Petkov Method and device for processing of blanks by hydroplastic forming
US4580427A (en) * 1984-12-13 1986-04-08 Eisho Seisakusho Co., Ltd. Method for manufacturing ornamented head lug pipes
DE4133188A1 (de) * 1990-10-08 1992-04-09 Zahnradfabrik Friedrichshafen Dichtungsanordnung
DE4312589C2 (de) * 1992-10-27 1998-07-09 Mannesmann Rexroth Ag Hydraulisches System für eine Umformpresse

Also Published As

Publication number Publication date
ATE176414T1 (de) 1999-02-15
WO1996041692A1 (fr) 1996-12-27
CA2224208A1 (fr) 1996-12-27
JPH11509479A (ja) 1999-08-24
DE19521101A1 (de) 1996-12-12
DE59601271D1 (de) 1999-03-18
EP0830221A1 (fr) 1998-03-25
CZ396097A3 (cs) 1999-05-12

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