EP0280056B1 - Hydraulische Kaltfliesspresse - Google Patents

Hydraulische Kaltfliesspresse Download PDF

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Publication number
EP0280056B1
EP0280056B1 EP88101156A EP88101156A EP0280056B1 EP 0280056 B1 EP0280056 B1 EP 0280056B1 EP 88101156 A EP88101156 A EP 88101156A EP 88101156 A EP88101156 A EP 88101156A EP 0280056 B1 EP0280056 B1 EP 0280056B1
Authority
EP
European Patent Office
Prior art keywords
piston
mandrel
press
cold
tool
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
EP88101156A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0280056A3 (en
EP0280056A2 (de
Inventor
Günter Dipl.-Ing. Hofmann (FH)
Herbert Dipl.-Ing. Rüger (FH)
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.)
Langenstein and Schemann GmbH
Original Assignee
Langenstein and Schemann 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 Langenstein and Schemann GmbH filed Critical Langenstein and Schemann GmbH
Publication of EP0280056A2 publication Critical patent/EP0280056A2/de
Publication of EP0280056A3 publication Critical patent/EP0280056A3/de
Application granted granted Critical
Publication of EP0280056B1 publication Critical patent/EP0280056B1/de
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
    • B21J9/02—Special design or construction
    • B21J9/06—Swaging presses; Upsetting presses
    • 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
    • B21J9/02—Special design or construction
    • B21J9/027—Special design or construction with punches moving along auxiliary lateral directions
    • 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
    • B21J9/12—Drives for forging presses 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
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • B21J9/20—Control devices specially adapted to forging presses not restricted to one of the preceding subgroups

Definitions

  • the invention relates to a hydraulic cold extrusion press with stand and hydraulic fluid drive, in which an interchangeable tool part is attached to a reciprocating plate, a further interchangeable tool part is seated on a stationary table, and the tool parts which are driven against one another form a housing-like closed tool for which Back and forth movement on the plate is attacked by a piston-cylinder device attached to the stand, the table is assigned an ejector movable to and fro by means of a piston-cylinder device attached to the stand, a working piston-cylinder device for exercising Forming pressure is provided on the stand, and the working piston-cylinder device is preceded by a controlled main valve, the piston-cylinder device acting on the plate closing the tool without deformation of a workpiece therein and keeping it closed for cold extrusion, and a in the housing-like tool penetrating, the cold extrusion of the workpiece causing, replaceable mandrel is acted upon by the working piston-cylinder device.
  • a known (DE-PS 21 41 980) cold extrusion press is designed in several stages with regard to the tool.
  • the piston-cylinder device acting on the plate also serves as a working piston-cylinder device and closes the tool under cold extrusion of the workpieces located in the tool.
  • the main valve is opened for the closing of the tool and the cold extrusion, and is closed when the tool is closed and the cold extrusion is thus ended.
  • the workpiece is disadvantageously formed in several stages. Let too do not produce such workpieces in this way, in which the material of the blank must flow in cavities at right angles to the forming pressure.
  • the cold extrusion press solves this problem, characterized in that a control device working on an adjustable main valve can be set to different values for the forming path and the forming speed of the press mandrel, that the plate acted upon by the piston-cylinder device detects the press distance from one another having driver stops in a starting position before the forming stroke drags, and that the working piston-cylinder device is divided into two working units arranged one behind the other, working on the same piston rod, and only a part of the pressure fluid supplied to the working piston device is led through the main valve to the one working unit, whereas the other part of the pressure fluid is led to the other working unit without a controlled main valve is led.
  • the arrangement of the press mandrel that is movable relative to the plate is advantageous, although the press mandrel must follow the closing movement of the plate because the press mandrel works on the stationary tool and the associated working piston-cylinder device can be attached to the head of the machine.
  • the mandrel is brought into working position by means of the plate and moved back out of it, which is the Operation of the working piston-cylinder device simplified. Since unusually large amounts of pressure fluid have to be fed into the working piston-cylinder device for the forming movement of the press mandrel and the main valve cannot let these large amounts pass in the desired short time, only a part of the required pressure fluid is controlled.
  • the uncontrolled hydraulic fluid part cannot do anything by itself and is only effective together with the controlled part.
  • control device working on the main valve can be set to different values for the dwell time of the press mandrel after the press stroke.
  • This value can also be easily controlled and set in a hydraulic press.
  • Forming speed and dwell time are important for the quality of the workpiece to be manufactured.
  • the variable parameters forming path, forming speed and dwell time are taken over from the hydraulic press, which is connected with a greatly simplified device for setting different values.
  • both the press mandrel on the table and the press mandrel on the plate are provided and the control device for synchronous operation of the two Press mandrels is designed.
  • the two mandrels work against each other and there is no need to support the tool against the action of a mandrel.
  • the synchronous operation can be designed for synchronous material displacement or synchronous speed.
  • the quality of the workpiece to be produced is improved by the synchronous control.
  • the speeds of the two mandrels can, however, be adjusted independently of one another, so that a defined non-synchronism of the two mandrels is also possible.
  • a forming mandrel is attached to the stand at right angles to the direction of movement of the pressing mandrel by means of a smaller working piston-cylinder device.
  • This forming mandrel which is smaller in comparison with the press mandrel, provides the workpiece with a hole and only requires a relatively small working piston-cylinder device.
  • the two forming mandrels act in opposite directions and the control device is designed for synchronous operation of the two forming mandrels.
  • the anchoring of the tool is relieved of the force of the forming mandrel.
  • the speeds of the two forming mandrels can also be set as desired independently of one another, so that a defined non-synchronism of the two forming mandrels is possible.
  • hydraulic fluid drive is formed by a unit comprising a pump and an accumulator. This enables particularly high forming speeds achievements.
  • a cold extrusion press according to the invention is said to deliver, for example, forming speeds of up to 200 m / s. The forming process usually takes about 0.15 s.
  • the hydraulic cold extrusion press has a frame-like stand 1 with an upper cross piece, two side columns and a lower cross piece.
  • a table 2 is installed in a fixed position and a plate 4 can be moved up and down on the columns by means of a guide device 3. Precise guidance of the plate is important.
  • the plate can be moved up and down by means of two piston-cylinder devices 5 and two piston-cylinder devices 6, which are attached to the upper cross piece of the stand 1.
  • the piston-cylinder devices 5 only serve to drive the plate 4 downwards and to hold it in a clamped position.
  • the two piston-cylinder devices 6 serve, on the one hand, to drive the plate 4 downwards and hold them in a clamping position, and, on the other hand, also to move the plate back or up again.
  • this piston-cylinder device 6 becomes hydraulic fluid centrally via a telescopic rod fed.
  • the four piston-cylinder devices 5, 6 move the plate 4 without tilting into the clamping position.
  • a drive piston-cylinder device 7 is provided in the center of the upper crosspiece and comprises two working units 8, 9, both of which act on the same piston rod 10, which carries a pressing mandrel 11 at one end, which protrudes through the plate 4.
  • the one working unit 8 is supplied with pressure fluid from a branch line 13 via a main valve 12 or servo valve and the other working unit 9 is supplied with pressure fluid from a branch line 14.
  • the drive units 8, 9 each drain into the tank via a controlled valve 15, hydraulic fluid being supplied to the pistons of the two drive units 8, 9 from below.
  • a drive piston-cylinder device 16 is also provided in the center, which is also divided into two drive units 17, 18, both of which act on the same piston rod 19, which at one end carries a press mandrel 20 which passes through the table 2 protrudes.
  • the hydraulic actuation of the drive piston-cylinder device 16 is the same as that of the other drive piston-cylinder device 7.
  • the latter device is not only moved with the plate 4 for the forming stroke of the press mandrel 11, but also empty.
  • the piston rod 10 has a stop 21 on the back of the plate 4, which can be moved back and forth between two driver stops 22, 23 which are arranged at a distance from one another and which are firmly connected to the plate 4.
  • the piston rod 19 is surrounded by a tubular ejector 24, which can be moved back and forth in the table 2 and can be displaced by means of a piston-cylinder device 25 which is arranged under the table 2.
  • a tubular ejector 24 which can be moved back and forth in the table 2 and can be displaced by means of a piston-cylinder device 25 which is arranged under the table 2.
  • two forming mandrels 26 are provided relatively close to the table 2, only one of which is shown and which can each be actuated by means of a smaller working piston-cylinder device 27 to which pressure fluid is supplied via a main valve 28.
  • These forming mandrels 26 form holes in the workpiece to be produced and are generally provided in pairs acting counter to one another, one, two or more forming mandrels being provided on each side as required.
  • Fig. 2 illustrates a tool 29, which consists of two tool parts 30, 31, one 30 of which is interchangeably screwed to table 2 and the other 31 is interchangeably attached to plate 4.
  • the mandrel guided in the plate 4 protrudes into a bore of the tool 29 and the mandrel 20 guided in the table 2 also protrudes into a bore of the tool, the two mandrels being arranged coaxially and acting against one another.
  • 2 shows a workpiece 32 made from a blank and bores 33 running in the parting plane between the tool parts 30, 31, through which the forming mandrels act on the workpiece.
  • the forming mandrels arranged opposite one another are arranged coaxially and act against one another.
  • a hydraulic fluid drive 34 for the drive piston-cylinder devices 7, 16, 27 comprises, according to FIG. 3, a pump 35 with a motor.
  • the pump 35 is connected via a check valve 36 to a store, on the other hand gas bottles 38 and a safety valve 39 are connected.
  • the hydraulic fluid supplied by the pump 35 in the accumulator 37 reaches a common line which is divided into two branch lines 13, 14, in each of which a connection valve 40 is provided, which opens suddenly when the accumulator is full.
  • the control device comprises a computer or computer 41, to which the respective position of the upper tool part 31 is fed by means of a displacement measuring device 42 and the respective position of the ejector 24 is fed via a displacement measuring device 43.
  • a pressure gauge 44 measures the pressure for the upper mandrel 11 on the rod side and a pressure gauge 45 measures the pressure for the lower mandrel 20 on the rod side.
  • Pressure gauges 46 and 47 each measure the pressure for the upper mandrel 11 and the lower mandrel 20 on the bottom side.
  • the movement of the press mandrels is controlled by comparing the rod-side and bottom-side pressure values.
  • the closing pressure of the tool can be determined via a pressure measuring device 48.
  • Another pressure measuring device 49 supplies the computer with the pressure emitted by the hydraulic fluid drive according to FIG. 3.
  • the computer works for the forming on the servomotor 50 of the main valve or servo valve of the upper mandrel and on the servomotor 51 of the main valve of the lower mandrel.
  • the speed of the upper tool part when closing and opening is controlled via a valve servomotor 57.
  • An actuator 52 is provided for each of the four lateral forming mandrels, which converts the movement of the forming mandrel into closing the main valve assigned to it.
  • An input device 56 is also provided for the desired mode of operation, with which the computer can, for example, select different ones Values of forming path, forming speed and dwell time of the mandrels and mandrels can be set.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Control Of Presses (AREA)
  • Press Drives And Press Lines (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP88101156A 1987-02-26 1988-01-27 Hydraulische Kaltfliesspresse Expired - Lifetime EP0280056B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3706193 1987-02-26
DE19873706193 DE3706193A1 (de) 1987-02-26 1987-02-26 Hydraulische kaltfliesspresse

Publications (3)

Publication Number Publication Date
EP0280056A2 EP0280056A2 (de) 1988-08-31
EP0280056A3 EP0280056A3 (en) 1990-05-23
EP0280056B1 true EP0280056B1 (de) 1992-04-15

Family

ID=6321817

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88101156A Expired - Lifetime EP0280056B1 (de) 1987-02-26 1988-01-27 Hydraulische Kaltfliesspresse

Country Status (4)

Country Link
US (1) US4831861A (enrdf_load_stackoverflow)
EP (1) EP0280056B1 (enrdf_load_stackoverflow)
JP (1) JPH0677785B2 (enrdf_load_stackoverflow)
DE (1) DE3706193A1 (enrdf_load_stackoverflow)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0549793A1 (en) * 1991-07-18 1993-07-07 Aida Engineering Ltd. Method of plastic forming
DE4331017C2 (de) * 1993-09-13 1999-09-23 Langenstein & Schemann Gmbh Verfahren zum Steuern einer Presse für Steinformlinge
DE4412224A1 (de) * 1994-04-09 1995-10-12 Graebener Pressensysteme Gmbh Presse für eine Kaltverformung von Metallwerkstücken
FR2723484B1 (fr) * 1994-08-05 1996-10-31 Endreprise Ind Sa L Machine de preparation de faisceaux electriques comportant plusieurs postes de sertissage
US6250128B1 (en) * 1997-04-22 2001-06-26 Komatsu Industries Corporation Forging die and upset forging method
DE19833604A1 (de) * 1997-07-29 1999-02-04 Luk Fahrzeug Hydraulik Kompressor
US5946966A (en) * 1997-09-24 1999-09-07 Tool Dex, Inc. Upset forging machine assembly having a quick change header
US6151937A (en) * 1999-02-17 2000-11-28 Amcast Industrial Corporation Machine for forming T-shaped tubular components using a forming material insert
DE10047467C5 (de) * 2000-09-21 2009-08-06 Schuler Pressen Gmbh & Co. Kg Vorrichtung und Verfahren zum Umformen, insbesondere mit hydraulischer Schließvorrichtung
AU2003229215A1 (en) * 2002-06-03 2003-12-19 Alcan International Limited Linear drive metal forming machine
SE0402404L (sv) * 2004-10-01 2005-08-16 Stroemsholmen Ab Slagplatta samt plåtformningsverktyg innefattande sådan slagplatta
US7343768B2 (en) * 2006-04-12 2008-03-18 Gm Global Technology Operations, Inc. Method of net-forming an article and apparatus for same
DE202009008413U1 (de) 2009-06-16 2009-09-10 Dold Kaltfließpressteile GmbH Werkzeugsystem für eine Umformpresse
IT1396156B1 (it) * 2009-10-05 2012-11-16 Hydromec S R L Macchina per lo stampaggio a caldo di articoli metallici.
CN101890467B (zh) * 2010-07-07 2015-07-08 葫芦岛龙源采油配套设备有限公司 液压镦锻机
CN103042147B (zh) * 2012-12-31 2014-07-02 中国重型机械研究院股份公司 一种重型锻压装置高速液压控制方法
CN103163065B (zh) * 2013-02-05 2014-09-17 上海交通大学 冷挤压润滑效果检测装置及方法
CN103111484B (zh) * 2013-03-20 2014-11-26 龙西新 一种具有双向挤压功能的金属塑性成形装置
CN103240294B (zh) * 2013-06-05 2015-03-25 株洲市文佳实业有限公司 一种金属塑性挤压成形主机
CN103394623A (zh) * 2013-07-10 2013-11-20 如皋透平叶片制造有限公司 一种阀杆20寸以下墩头处理模具
JP6123810B2 (ja) * 2015-01-08 2017-05-10 マツダ株式会社 鍛造金型の複動システム
GB201707519D0 (en) * 2017-05-10 2017-06-21 Imp Innovations Ltd A method for forming curved lengths of extruded profiles/sections in metal alloys
CN112517658B (zh) * 2020-10-16 2022-04-08 中北大学 外纵筋筒形件双向差速挤压成形模具

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180129A (en) * 1961-10-19 1965-04-27 Eumuco Ag Fur Maschb Top-pressure forging hammer
JPS511397Y2 (enrdf_load_stackoverflow) * 1971-04-05 1976-01-16
DE2141980C3 (de) * 1971-08-21 1975-10-23 Eumuco Ag Fuer Maschinenbau, 5090 Leverkusen Hydraulische Mehrstufen-Kaltfließpresse
CH617368A5 (en) * 1977-05-06 1980-05-30 Supervis Ets Method for the production of a workpiece by extrusion, application of the method and an apparatus for carrying out the method
DE2747548C2 (de) * 1977-10-22 1986-04-17 Thyssen Industrie Ag, 4300 Essen Presse mit Regelkreis
US4321818A (en) * 1979-10-03 1982-03-30 Kawaski Yukon Kabushiki Kaisha Closed forging press
DE3223517A1 (de) * 1982-06-24 1983-12-29 Friedrich Dr.-Ing. 5828 Ennepetal Keilholz Steuerung fuer eine hydraulisch angetriebene umformpresse
DE3230930A1 (de) * 1982-08-20 1984-02-23 Schirmer, Plate und Siempelkamp Hydraulische Pressen GmbH, 4150 Krefeld Regeltechnische schaltungsanordnung bei einer umformpresse
JPS6030545A (ja) * 1983-07-28 1985-02-16 Sumitomo Heavy Ind Ltd 閉塞鍛造装置
DE3429490A1 (de) * 1983-08-12 1985-02-21 Kabushiki Kaisha Komatsu Seisakusho, Tokio/Tokyo Schmiedemaschine mit geschlossenem gesenk
JPS6076240A (ja) * 1983-10-03 1985-04-30 Sumitomo Heavy Ind Ltd 油圧式鍛造装置

Also Published As

Publication number Publication date
US4831861A (en) 1989-05-23
EP0280056A3 (en) 1990-05-23
DE3706193C2 (enrdf_load_stackoverflow) 1990-12-20
DE3706193A1 (de) 1988-09-08
JPH0677785B2 (ja) 1994-10-05
JPS63230243A (ja) 1988-09-26
EP0280056A2 (de) 1988-08-31

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