EP0829318A2 - Procédé de réglage de fréquence de la course du coulisseau dans une presse de forgeage et presse de forgeage pour la mise en oeuvre de ce procédé - Google Patents

Procédé de réglage de fréquence de la course du coulisseau dans une presse de forgeage et presse de forgeage pour la mise en oeuvre de ce procédé Download PDF

Info

Publication number
EP0829318A2
EP0829318A2 EP97890185A EP97890185A EP0829318A2 EP 0829318 A2 EP0829318 A2 EP 0829318A2 EP 97890185 A EP97890185 A EP 97890185A EP 97890185 A EP97890185 A EP 97890185A EP 0829318 A2 EP0829318 A2 EP 0829318A2
Authority
EP
European Patent Office
Prior art keywords
drive
forging
stroke
hydraulic
connection
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.)
Granted
Application number
EP97890185A
Other languages
German (de)
English (en)
Other versions
EP0829318B1 (fr
EP0829318A3 (fr
Inventor
Alfred Ing. Seeber
Rupert Ing. Wieser
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.)
GFM Holding AG
Original Assignee
GFM Holding 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 GFM Holding AG filed Critical GFM Holding AG
Publication of EP0829318A2 publication Critical patent/EP0829318A2/fr
Publication of EP0829318A3 publication Critical patent/EP0829318A3/fr
Application granted granted Critical
Publication of EP0829318B1 publication Critical patent/EP0829318B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/02—Special design or construction
    • B21J7/14—Forging machines working with several hammers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/20—Drives for hammers; Transmission means therefor
    • B21J7/22—Drives for hammers; Transmission means therefor for power hammers
    • B21J7/28—Drives for hammers; Transmission means therefor for power hammers operated by hydraulic or liquid pressure

Definitions

  • the invention relates to a method for controlling the stroke frequency of a forging machine with a mechanical lifting drive for the lifting movement of a forging punch and a hydraulic drive connection between the linear actuator and Forging stamp and on a forging machine to carry out this process.
  • Such forging machines are available in different versions, with a lifting drive a crank or eccentric drive is used, the stroke movement of which is hydraulic Drive connection is transferred to the forging stamp, for which purpose, for example Lift drive actuates a piston pump, the pump chamber of which is hydraulically connected to the Forge stamp associated with the working cylinder.
  • These forging machines enable simple overload protection and high forming performance a stroke position adjustment by changing the hydraulic filling quantity in the hydraulic Drive connection.
  • the stroke numbers of the forging stamps have so far only been to control the mechanical drive, which is because of a reduction in speed occurring losses of kinetic energy only a very limited Control area allows.
  • the invention is therefore based on the object of a method of the aforementioned Specify the type with which the stroke frequency of the forging hammers is rational can be influenced.
  • a low-effort, compact Forging machine can be created to perform this process.
  • the invention solves this problem in that the speed of the linear actuator to high stroke frequency of the forging punch and to reduce the stroke frequency the hydraulic pressure of the drive connection at constant speed of the Lift drive for periodically successive drive strokes in the same dimension as the drive. conditional increase is reduced, while preferably the forge stamp is blocked in the top dead center area.
  • the control step remains the mechanical drive side of the stroke rate reduction of the forging die untouched, the drive speeds, which are responsible for the high stroke frequencies necessary can be maintained and there are no difficulties regarding the kinetic energy losses.
  • On the side of the hydraulic drive connection only needs to reduce the stroke frequency in the required rhythm the drive strokes the working pressure that builds up is reduced and rendered ineffective to be, and the stroke frequency of the forging die can be adjusted accordingly decrease.
  • Forging machines with a hydraulic drive connection between the stroke drive and forging stamps are available in different constructions, with the execution the method only the drive connection via a depending on the Stroke actuated switching valve to be connected to a pressure accumulator needs. This means that when the switching valve is open, the hydraulic pressure during a Drive strokes do not increase to the extent required for a forging stroke, is forwarded to the pressure accumulator and only effective there, so that despite Drive stroke no forging stroke occurred.
  • a suitable blocking device the forging stamps are fixed in their top dead center position, what for mechanical interlocks are possible, but expediently hydraulic pads can be used as a movement lock, with greater functional reliability bring.
  • a low-effort design results if the drive connection is a drive-side one Pump piston and a piston-side working piston, which Engage pistons in a common hydraulic cylinder, preferably the Forging stamp by means of a hydraulic compression spring made of at least one on one Accumulator connected piston drive can be pressurized against the direction of action and the connecting line between the piston drive and the accumulator is a shut-off valve having.
  • This direct immersion of the pump piston and working piston in a common hydraulic cylinder additional hydraulic lines are unnecessary, what best hydraulic transmission conditions guaranteed.
  • the subject of the invention is, for example, based on a schematic Sectional illustration of a forging machine according to the invention illustrated in more detail.
  • a forging machine 1 has a forging punch 2, for which a mechanical Lift drive 3 and a hydraulic drive connection 4 between the lift drive 3 and forging stamp 2 are provided.
  • the hydraulic drive connection 4 exists thereby from a hydraulic cylinder 5, in the one hand facing away from the tool End part of the forging punch 2 as a working piston 6 and on the other hand as a plunger trained, operated via the linear actuator 3 pump piston 7.
  • the Lift drive 3 is an eccentric drive, the eccentric 8 of which is a rotatable sliding block 9 Conversion of the rotary movement into a lifting movement as a drive movement for the Pump piston 7 receives.
  • the forging punch 2 guided in a longitudinal guide 10 is pressurized via a compression spring 11 opposite to the effective direction, so that there is a corresponding return stroke after a working stroke and also against the hydraulic medium within the hydraulic cylinder 5 of the pump piston 7 the sliding block 9 is pressed and there is no positive connection to the drive connection Coupling by means of a backdrop or the like.
  • the compression spring 11 consists of two Piston drives 12, which are connected via a connecting line 13 to an accumulator 14 are, the connecting line 13 has a shut-off valve 15 which the Interruption of the line connection between piston drives 12 and accumulator 14 and thus a stroke layer blockage of the forging stamp 2 is permitted.
  • the cylinder space 16 of the hydraulic cylinder 5 to an only indicated hydraulic medium supply system 17 connected, in addition to not shown security, leakage and Temperature compensation devices u.
  • This housing bore 22 can be a multi-way Switch valve 23 can be optionally connected to one or the other device.
  • Switch valve 23 switched so that the connecting line 22 either to the hydraulic fluid supply device 18 or connected to the hydraulic fluid discharge device 19 and hydraulic fluid is pumped into or pumped out of the cylinder space 16 until the forging punch 2 reaches the desired stroke position is retracted.
  • the switching valve 23 is in its Locked position (position shown) so that the working strokes of the linear actuator 3 over the drive connection 4 with the same frequency on the working piston and thus the Forging stamp 2 is transmitted and the forging stamp 2 with the working frequency same stroke frequency works.
  • the switching valve 23 switches as required Moment the connecting line 22 with the pressure accumulator 20 briefly, whereby at a working stroke of the lifting drive 3 from the hydraulic fluid through the pump piston 7 the cylinder space 16 is conveyed via the connecting line 22 into the pressure accumulator 20 and the forging stamp 2 remains unused. In this case, too Shut-off valve 15 for the compression spring 11 closed and the forging stamp in the upper one Dead center area fixed. After one or more empty strokes then for the subsequent drive stroke, the switching valve 23 is switched back to the blocking position, so that the next stroke is transferred to the forging stamp 2 again is, also by operating the shut-off valve 15 and activation of the compression spring 11 is released again. It can be used independently of the mechanical linear actuator 3 vary the stroke frequency of the forging punch 2 within wide limits and at The use of several forging stamps can also influence the stroke sequence of the individual stamps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Control Of Presses (AREA)
EP97890185A 1996-09-17 1997-09-16 Procédé de réglage de fréquence de la course du coulisseau dans une presse de forgeage et presse de forgeage pour la mise en oeuvre de ce procédé Expired - Lifetime EP0829318B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0164096A AT404440B (de) 1996-09-17 1996-09-17 Verfahren zur hubfrequenzsteuerung einer schmiedemaschine und schmiedemaschine zum durchführen des verfahrens
AT164096 1996-09-17
AT1640/96 1996-09-17

Publications (3)

Publication Number Publication Date
EP0829318A2 true EP0829318A2 (fr) 1998-03-18
EP0829318A3 EP0829318A3 (fr) 2000-06-07
EP0829318B1 EP0829318B1 (fr) 2002-08-28

Family

ID=3517791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97890185A Expired - Lifetime EP0829318B1 (fr) 1996-09-17 1997-09-16 Procédé de réglage de fréquence de la course du coulisseau dans une presse de forgeage et presse de forgeage pour la mise en oeuvre de ce procédé

Country Status (5)

Country Link
US (1) US5857378A (fr)
EP (1) EP0829318B1 (fr)
JP (1) JPH10146639A (fr)
AT (1) AT404440B (fr)
DE (1) DE59708049D1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT407617B (de) * 1999-10-07 2001-05-25 Gfm Beteiligungs & Man Gmbh Schmiedemaschine
AT519527B1 (de) * 2016-12-22 2018-10-15 Gfm Gmbh Schmiedevorrichtung
CN106623719B (zh) * 2017-02-24 2019-04-26 王安基 锻造机构及锻机
CN109751289B (zh) * 2019-01-21 2020-07-03 太原理工大学 一种液力混合式径向锻造机液压系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1572780A (en) * 1977-02-26 1980-08-06 Kawasaki Yuko Kk Forging press
US4321818A (en) * 1979-10-03 1982-03-30 Kawaski Yukon Kabushiki Kaisha Closed forging press
DE3935011A1 (de) * 1989-01-27 1990-08-02 Warnke Umformtech Veb K Antrieb fuer mechanische pressen
US5447050A (en) * 1992-09-30 1995-09-05 Pahnke Engineering Gmbh & Co., Kg Forming machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1812169A1 (de) * 1968-12-02 1970-06-18 Sack Gmbh Maschf Schmiedemaschine
US3783672A (en) * 1972-02-23 1974-01-08 A Morgolenko High-speed machines for shaping metals which employ the energy of high-pressure gas
SU479554A1 (ru) * 1973-01-17 1975-08-05 Рязанский Завод Тяжелого Кузнечнопрессового Оборудования Радиально-ковочна машина
US4148209A (en) * 1978-04-07 1979-04-10 Kawasaki Yukoh Kabushiki Kaisha Forging press
DE4444498A1 (de) * 1993-12-16 1995-06-22 Hasenclever Maschf Sms Schmiedemaschine
JP3251135B2 (ja) * 1994-09-30 2002-01-28 株式会社放電精密加工研究所 順送り加工装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1572780A (en) * 1977-02-26 1980-08-06 Kawasaki Yuko Kk Forging press
US4321818A (en) * 1979-10-03 1982-03-30 Kawaski Yukon Kabushiki Kaisha Closed forging press
DE3935011A1 (de) * 1989-01-27 1990-08-02 Warnke Umformtech Veb K Antrieb fuer mechanische pressen
US5447050A (en) * 1992-09-30 1995-09-05 Pahnke Engineering Gmbh & Co., Kg Forming machine

Also Published As

Publication number Publication date
EP0829318B1 (fr) 2002-08-28
US5857378A (en) 1999-01-12
JPH10146639A (ja) 1998-06-02
ATA164096A (de) 1998-04-15
AT404440B (de) 1998-11-25
EP0829318A3 (fr) 2000-06-07
DE59708049D1 (de) 2002-10-02

Similar Documents

Publication Publication Date Title
EP1318906B1 (fr) Dispositif de commande pour une presse hydraulique et procede pour son fonctionnement
EP2480405B1 (fr) Entrainement hydraulique precontraint dote d'une pompe a vitesse variable
DE2747548A1 (de) Servohydraulische presse mit ge schlossenem regelkreis
EP0972631B1 (fr) Entraínement hydraulique pour une presse
DE19646913A1 (de) Hydraulische Antriebseinheit einer Presse und eine Taumelscheiben-Axialkolbenpumpe mit variabler Kapazität zur Verwendung mit dieser Vorrichtung
EP0696960B1 (fr) Module porte-outils entraine par une presse, notamment unite de decoupage transversal ou de pliage entrainee par une presse
EP1706648A1 (fr) Dispositif d'entrainement
EP1086802B1 (fr) Presse avec entraînement à vilebrequin pour le poinçon supérieur et son procédé de fonctionnement
DE2242204B2 (de) Druckmittelbeaufschlagter servomotor
EP0829318B1 (fr) Procédé de réglage de fréquence de la course du coulisseau dans une presse de forgeage et presse de forgeage pour la mise en oeuvre de ce procédé
DE8021267U1 (de) Lastausgleichsvorrichtung fuer pressenwerkzeuge
EP0629455A1 (fr) Entraînement principal pour press à refouler
DE19927341A1 (de) Verfahren zum Betreiben einer Brikettierpresse und Brikettierpresse
EP0616882B1 (fr) Méthode de commande hydraulique d'une presse à levier articulée ou à genoullière et presse à levier articulée ou à genoullière avec un système de commande adapté à la mise en oeuvre de la méthode
DE2922192A1 (de) Hydraulische mehrzylinderpresse, insbesondere schmiedepresse
DE4208256C2 (de) Hydraulische Steuereinrichtung für Messerstern-Teigteil- und Wirkmaschinen
DE19757157C2 (de) Hydraulischer Linearantrieb
EP0207930B1 (fr) Dispositif de serrage pour outillage de presses
DE2022812A1 (de) Antrieb einer hydraulischen Presse mit Schwungrad
DE1703726C3 (de) Druckflüssigkeitsbetriebene Vorrichtung zur Erzeugung einer hin- und hergehenden Bewegung
DE20020007U1 (de) Stößelantrieb für eine Presse
DE4106639A1 (de) Hydraulische presse fuer pulverfoermige massen
AT507932B1 (de) Hydraulische zylinder-kolben-einheit, insbesondere für eine presse
EP3338909B1 (fr) Dispositif d'estampage
DE3635042C2 (de) Hydraulik- oder Pneumatikzylinder

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

RIC1 Information provided on ipc code assigned before grant

Free format text: 7B 21J 7/14 A, 7B 21J 7/28 B, 7B 30B 1/26 B

17P Request for examination filed

Effective date: 20000620

AKX Designation fees paid

Free format text: DE FR GB IT SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 20020306

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: GFM HOLDING AG

REF Corresponds to:

Ref document number: 59708049

Country of ref document: DE

Date of ref document: 20021002

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20021029

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20030530

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20100927

Year of fee payment: 14

Ref country code: IT

Payment date: 20100928

Year of fee payment: 14

Ref country code: FR

Payment date: 20100923

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20100923

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20110901

Year of fee payment: 15

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20110916

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110916

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20120531

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110916

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110917

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59708049

Country of ref document: DE

Effective date: 20130403

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130403