EP1023132B1 - Systeme d'entrainement hydraulique pour presse a forger ou coulisseaux de machine a forger - Google Patents

Systeme d'entrainement hydraulique pour presse a forger ou coulisseaux de machine a forger Download PDF

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Publication number
EP1023132B1
EP1023132B1 EP98955381A EP98955381A EP1023132B1 EP 1023132 B1 EP1023132 B1 EP 1023132B1 EP 98955381 A EP98955381 A EP 98955381A EP 98955381 A EP98955381 A EP 98955381A EP 1023132 B1 EP1023132 B1 EP 1023132B1
Authority
EP
European Patent Office
Prior art keywords
piston
valve
drive system
tool
cylinder
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
EP98955381A
Other languages
German (de)
English (en)
Other versions
EP1023132A1 (fr
Inventor
Otto Herndl
Albert Eck
Dieter Volksheimer
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.)
SMS Group GmbH
Original Assignee
SMS Eumuco GmbH
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 SMS Eumuco GmbH filed Critical SMS Eumuco GmbH
Publication of EP1023132A1 publication Critical patent/EP1023132A1/fr
Application granted granted Critical
Publication of EP1023132B1 publication Critical patent/EP1023132B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • 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
    • 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

Definitions

  • the invention relates to a hydraulic drive system, as for the plunger of Multi-ram forging machines is known from DE-A2-38 03 632.
  • the one each Tool-bearing plungers are designed as pistons on the tool opposite side with a pressure valve and a valve seat subsequent central flow hole are provided with side channels one is connected via a drain line to keep the chamber depressurized, one of an actuator-controlled valve tappet cooperates with the valve seat on the piston and controls the piston stroke.
  • the pistons are designed as differential pistons and on their piston ring surface constantly acted upon by the pressure medium in the retreat direction. This The drive system is characterized by high dynamics and low construction costs.
  • this drive system is suitable for use high - speed forging presses, which are used as a replacement for forging hammers Should reach 180 to 240 strokes per minute. This is opposed to the fact that Forging presses must be designed for much larger strokes than the relative short-stroke forging machines, with which the axial length of the drive system and the ram mass increase accordingly.
  • the object of the invention is the drive system known from DE-A2-38 03 632 to improve an application on high-speed forging presses. To the solution this task is a reduction in the axial length of the drive system Aimed at reducing its mass and is characterized by its distinctive features of claim 1 achieved.
  • the forging press consists of a fixed lower traverse 1, also one fixed upper cross member 2 and these connecting columns 3.
  • the cross member 1 carries a lower saddle 4 which is opposed by a movable upper saddle 5.
  • The is moved Upper saddle 5 from a piston 6, which is connected to an upper plate 7 on which the Upper saddle 5 is attached.
  • a cylinder 8 guiding the piston 6 is fixed in the upper one Traverse 2 used and provided with a bush 9 for guiding the piston 6.
  • the piston 6 in the cylinder 8 can be acted upon via a pressure medium supply line 10 in the cylinder cover 11.
  • the cylinder 8 and the cylinder cover 11 are by tie rods 27 connected to the upper cross member 2.
  • Retraction cylinders 12 are used for the return stroke Plunger 13 is provided, with the retraction cylinder 12 in the upper Support crossbar 2 and the plungers 13 act against yokes 15.
  • the plungers 13 in the retraction cylinders 12 from a not shown Low pressure accumulator constantly acted on.
  • piston-cylinder units for the Treatment can be provided, the cylinders are fixed in the upper cross member 2 and on whose piston rods are attached to the top plate 7. Also, instead of Retraction cylinder formation of the piston 6 and the cylinder 8 as a double-acting Piston-cylinder unit can be provided, the one to be provided for the retraction Ring surface on the piston 6 is then constantly applied.
  • valve tappet 18 with a seat 19 on Bottom 20 of the partially hollow piston 6 cooperates.
  • Valve tappet 18 is hollow and is designed for connection to a rod 23 Head end 24 provided with side channels 25 for the pressure-free pressure medium.
  • a Piston-cylinder unit 26 is provided as a link of a servo control and via the Rod 23 is flexibly connected to the valve lifter 18.
  • valve lifter 18 is opened by the piston of the piston-cylinder unit 26 the valve seat 19 depressed, the piston 6 and the valve lifter 18 den Drive down gear together.
  • the desired forging dimension is reached, over the servo control of the pistons of the piston-cylinder unit 26 is opposite, that is acts on the valve plunger 18 away from the valve seat 19.
  • By this opening of the valve reduces the working pressure above the piston 6 by the Pressure medium through the hollow valve rod 18, the side channels 25 in the head 24 of the Valve rod 18 and finally drains through the drain 17, so that the piston 6 after decompression of the pressure medium comes to a standstill. If the Valve is the upper forging tool with the top plate 7 and the piston 6 from the plunger 13 of the retraction cylinder 12 via the yokes 15 and Guide rods 14 raised.
  • the forging machine shown in Figure 4 has four X-shaped in one plane arranged forging tools. It consists of a frame 40 which is made of Intermediate pieces 41 and trusses 42 are assembled by the tie rod 43 are interconnected. In each of the four traverses 42 there is one serving as a ram Piston 46 guided, which is provided with an end plate 47 with which a not shown Tool is detachably connected. Each piston 46 is guided in a cylinder 48 which in his traverse 42 is inserted. Each piston 46 is in its cylinder for the working stroke 48 can be acted upon via a pressure medium supply line 50 in the cylinder cover 51 Cylinder 48, a cylinder cover 51 and a cross member 42 are through tie rods 67 connected.
  • Retraction cylinders 52 with plungers 53 are provided for the return stroke, the retraction cylinders 52 are supported in the crossbeams 42 and the plungers 53 act against yokes 55, the guide rods 54 with the end plate 47 of the associated piston 46 are connected.
  • the plungers 53 are in the Retraction cylinders 52 via pressure medium supply lines 62 from a not shown Low pressure accumulator constantly acted on.
  • For the return stroke and standstill of the Koiben 46 is a discharge line 57 in the cylinder cover 51 intended.
  • valve lifters 58 which have seat surfaces 59 interact with the bottoms 60 of the pistons 46, which are hollow over part of their length.
  • Each valve tappet 58 is guided in a with the cylinder cover 51 of the associated cylinder 48 connected hollow pin 61.
  • the valve lifters 58 are hollow and at their head ends 64 with side channels designed for connection with rods 63 65 for the unpressurized pressure medium.
  • Each valve lifter 58 has one Piston-cylinder unit 66 as a member of a servo control via the rods 63 flexibly connected.
  • valve lifters 58 are removed from the pistons the piston-cylinder units 66 depressed on their valve seats 59, the pistons 46 and the valve lifters 58 travel the stroke together.
  • the controlled stroke is via the servo control of the pistons of the piston-cylinder unit 66 applied in the opposite direction, with which the associated valve lifter 58 removed from its valve seat 59.
  • the working pressure builds up over the respective piston 46 from by the pressure medium via the hollow valve lifter 58 and the side channels 65 in Head end 64 and finally flows through the discharge line 57, so that the piston 46 after Decompression of the pressure medium comes to a standstill.
  • the valves open further are the pistons 46 from the plunger 53 via the yokes 55, the Guide rods 54 and the end plate 47 moves in the return stroke through their position their valve lifter 58 predetermined starting position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Press Drives And Press Lines (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (4)

  1. Système d'entraínement hydraulique pour un coulisseau portant un outil d'une presse de forge ou machine de forge, qui est formé en tant que piston (6, 46) et qui est muni d'un siège de soupape (19, 59) du côté opposé à l'outil et pouvant être alimenté par un moyen à pression, d'un poussoir de soupape (18, 58) commandé par un organe moteur (26, 66), agissant de concert avec le siège de soupape et d'un conduit d'évacuation (17, 57) sans pression pouvant être fermé par la soupape composée d'un siège de soupape (19, 59) et d'un poussoir de soupape (18, 58), menant à la chambre de cylindre, dans lequel le piston (6, 46) est réalisé partiellement en creux sur son côté opposé à l'outil et le poussoir de soupape (18, 58) est guidé dans le couvercle de cylindre (11, 51) de façon à pouvoir être ajusté axialement, caractérisé en ce que le piston (6, 46) est muni du siège de soupape (19, 59) sur le fond de l'évidement et que le poussoir de soupape (18, 58) est conçu en forme de tube et muni de canaux latéraux (25, 65) reliant l'espace intérieur du poussoir à une chambre entourant le poussoir de soupape (18, 58), maintenue sans pression par un conduit d'évacuation.
  2. Système d'entraínement hydraulique selon la revendication 1, caractérisé en ce que le piston est conçu en tant que piston plongeur et relié du côté de l'outil à une plaque supérieure(7)/plaque frontale(47) portant un outil, qui est guidée par des barres de guidage (14, 54) dans la traverse (2, 42) et par lesquelles des unités piston(13, 53)-cylindre(12, 52) prenant appui sur la traverse (2, 42) provoquent le retrait du piston plongeur (6, 46).
  3. Système d'entraínement hydraulique selon la revendication 1, caractérisé en ce que quatre barres de guidage (14, 54) sont prévues, qui sont liées par paires au moyen de longrines (15, 55) au-dessus de la traverse (2, 42), entre lesquelles et la traverse sont disposées les unités piston(13, 53)-cylindre(12, 52) pour le retrait.
  4. Système d'entraínement hydraulique selon l'une quelconque des revendications précédentes, caractérisé en ce que les pistons de retrait (13, 53) dans leurs cylindres (12, 52) sont constamment alimentés à partir d'un accumulateur, de façon non commandée pendant les opérations de forgeage.
EP98955381A 1997-10-15 1998-10-08 Systeme d'entrainement hydraulique pour presse a forger ou coulisseaux de machine a forger Expired - Lifetime EP1023132B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19745505 1997-10-15
DE19745505 1997-10-15
PCT/DE1998/002975 WO1999019096A1 (fr) 1997-10-15 1998-10-08 Systeme d'entrainement hydraulique pour presse a forger ou coulisseaux de machine a forger

Publications (2)

Publication Number Publication Date
EP1023132A1 EP1023132A1 (fr) 2000-08-02
EP1023132B1 true EP1023132B1 (fr) 2001-12-19

Family

ID=7845590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98955381A Expired - Lifetime EP1023132B1 (fr) 1997-10-15 1998-10-08 Systeme d'entrainement hydraulique pour presse a forger ou coulisseaux de machine a forger

Country Status (7)

Country Link
US (1) US6401516B1 (fr)
EP (1) EP1023132B1 (fr)
JP (1) JP3345400B2 (fr)
KR (1) KR100562188B1 (fr)
AT (1) ATE211036T1 (fr)
DE (3) DE29817969U1 (fr)
WO (1) WO1999019096A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102125976A (zh) * 2010-01-13 2011-07-20 辽阳石化机械设计制造有限公司 四锤头液压精锻机供油装置
UA95431C2 (ru) * 2010-12-16 2011-07-25 Виктор Андреевич ЛАЗОРКИН Четырехбойковое ковочное устройство для ковочных прессов
CN102619810A (zh) * 2012-04-24 2012-08-01 温州鹤立液压机械有限公司 一种压力增倍的液压机油缸
CN102632177B (zh) * 2012-05-03 2014-10-08 青岛华东工程机械有限公司 一种套缸缸动式压机
US9365008B1 (en) * 2012-09-28 2016-06-14 Michael Kenneth Walker Actuating device
CN103009044A (zh) * 2012-12-09 2013-04-03 青岛张氏机械有限公司 一种麻轮组装压力机
CN105215248A (zh) * 2015-11-01 2016-01-06 天津市巨星祥海机械有限公司 金属锻压机
DE102016205973A1 (de) 2016-04-11 2017-10-12 Sms Group Gmbh Hydraulikzylinder
CN109253129B (zh) * 2017-07-12 2022-03-08 上海宝钢工业技术服务有限公司 径向锻机主液压缸的测试***及方法
CN108339914A (zh) * 2018-01-17 2018-07-31 罗诗敏 一种五金件液压锻造机
CN109175180B (zh) * 2018-09-04 2019-11-26 华中科技大学 一种单横梁缸动式的锻造液压机
KR102554165B1 (ko) 2021-11-26 2023-07-12 주식회사 영진테크 자동 모션 제어 밸브

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2744315A (en) * 1951-11-15 1956-05-08 Pneumatic Drop Hammer Company Method and apparatus for die-forging articles from blanks of normally rigid material
FR1605286A (fr) * 1964-04-16 1974-04-05
US3925985A (en) * 1973-01-09 1975-12-16 Rapidex Inc Impact actuator
DE2306566C2 (de) * 1973-02-10 1983-11-17 Pahnke Engineering GmbH & Co KG, 4000 Düsseldorf Hydraulischer Antrieb für Schmiedemaschinen
DE3803632A1 (de) * 1988-02-06 1989-08-17 Eumuco Ag Fuer Maschinenbau Mehr-stoessel-schmiedemaschine

Also Published As

Publication number Publication date
WO1999019096A1 (fr) 1999-04-22
DE59802571D1 (de) 2002-01-31
ATE211036T1 (de) 2002-01-15
KR20010023161A (ko) 2001-03-26
JP2001519241A (ja) 2001-10-23
KR100562188B1 (ko) 2006-03-20
DE29817969U1 (de) 1999-02-18
US6401516B1 (en) 2002-06-11
JP3345400B2 (ja) 2002-11-18
EP1023132A1 (fr) 2000-08-02
DE19846348A1 (de) 1999-04-22

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