WO1996020053A1 - Doppelpresse - Google Patents
Doppelpresse Download PDFInfo
- Publication number
- WO1996020053A1 WO1996020053A1 PCT/EP1995/004226 EP9504226W WO9620053A1 WO 1996020053 A1 WO1996020053 A1 WO 1996020053A1 EP 9504226 W EP9504226 W EP 9504226W WO 9620053 A1 WO9620053 A1 WO 9620053A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- forging
- double press
- cylinder
- pump
- units
- 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.)
- Ceased
Links
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
- 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
- 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
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B7/00—Presses characterised by a particular arrangement of the pressing members
- B30B7/04—Presses characterised by a particular arrangement of the pressing members wherein pressing is effected in different directions simultaneously or in turn
Definitions
- the invention relates to a double press for forging round or angular rod-shaped workpieces with two pairs of mutually arranged forging tools which are hydraulically driven by means of two pump units and are arranged offset by 90 °.
- each unit of a double press consists of two opposing cylinder-piston units that deform the workpiece without moving its central axis, e.g. in German Offenlegungsschrift 2 221 341. Two such presses are arranged one behind the other in the longitudinal axis of the workpiece, so that they can deform rod-shaped workpieces transversely to their longitudinal axis in two planes.
- a forging machine in which the synchronization of two cylinder-piston units working against each other is accomplished by articulated levers which connect the forging tools to one another via a sliding piece which slides perpendicularly to the working axis in a guide.
- the slider is acted upon by a logging cylinder, which causes the forging tools to be returned via the joint pieces.
- the function of resetting the forging tools can be taken over by a further pair of cylinder-piston units working against one another, which is arranged perpendicular to the first pair in the same plane. In this way, the synchronized alternating drive of the two pairs of pistons is ensured.
- a decisive disadvantage of the forging machine mentioned is that the mechanical synchronization does not allow the stroke of the forging tools to be varied. By adjusting the stroke to the decreasing material thickness, shorter piston operating times and thus faster forging and the saving of energy would be desirable.
- the control of the cylinder-piston units by valves in the main lines limits the stroke frequency.
- the object of the present invention is to provide a double press which eliminates the design-related disadvantages of the forging machine mentioned in DE 38 00 220 and whose implementation is also less expensive.
- the performance of the operating pump units should be better used and the exact synchronization of the forging tools should be ensured with simple means.
- a double press according to the preamble of claim 1, the two pairs of forging tools being arranged in two planes which are offset one behind the other in the direction of the workpiece longitudinal axis.
- the cylinder-piston units of the four forging tools of a double press are driven alternately, each of the pump assemblies on its respective pressure side with a cylinder-piston unit of a forging tool of the one pair and on its suction side with a cylinder-piston Unit of a forging tool of the other pair is connected.
- the suction and pressure sides change with the reversal of the conveying direction.
- the main lines between the pump units and the cylinder-Koiben units are free of valves and that the direction of delivery of the pump units is reversible.
- a double press in the form of two free-form presses offset one behind the other is inexpensive to produce compared to the forging machines mentioned.
- conventional open-die forging tools can be used, thereby saving costs. Due to the design, the eccentric forces that strain the machine are avoided.
- pairs of forging tools can be driven by two pump units in the manner mentioned and the pressure medium flow in the main lines is not impeded by valves with the required switching times, a significantly higher stroke frequency of the forging tools is made possible.
- the control according to the invention offers an exact synchronization of the movement of the forging tools with a significantly higher wear resistance.
- the stroke of both pairs of forging tools can be individually adjusted in a simple manner by means of an electronic control unit.
- the individual adjustment of the stroke of the forging tools avoids unnecessary idle strokes and thus saves energy.
- the three-way valves enable the loss of pressure medium to be compensated for by leaks in the system.
- the pump units work in both directions and no longer have an unused return stroke, fewer pumps and therefore less pressure medium are required to drive the cylinder-piston units.
- the pump capacity is reduced by 50 ..
- the invention offers the possibility of urr.zuse the energy that must be expended for the compression of the pressure medium into usable mechanical energy.
- These waves become pumpers.
- flywheels that store the energy of the pumps working as hydraulic motors in the intermediate phase and thus make them available for the pump drive.
- the pressure medium hardly heats up due to the conversion of the energy.
- the forging machine does not require additional cooling.
- the electronic control By switching off one pump unit, the electronic control enables one of a pair of forging tools to be attached to the forging and fixed, while the other pair of tools, operated by the other pump unit, can work with a fast forging sequence.
- Fig 1 The double press.
- Fig 2 The drive of the double press.
- the first pair I of forging tools AI and A2 is operated by two cylinder-piston units 1 and 3.
- the second pair II of forging tools B1 and B2 is operated by two further cylinder-piston units £ and 4.
- the pairs I and II of the forging tools are at 9C ° offset in two planes. You are machining workpiece 35.
- the cylinder-piston unit. 1 and 2 are via the main lines 21 and 22 from the pump unit 5 with Pressure medium supplied.
- One main line 21 is connected to the pressure side of the pump 5, the other main line 22 to the suction side of the pump 5.
- the suction and pressure sides change with the reversal of the conveying direction.
- the main lines 21, 22, 23 and 24 are between the pumps
- the pump units 5 and 6 comprise at least one, in an advantageous embodiment, several pumps connected in parallel, in particular radial piston pumps, the delivery rate of which is infinitely variable and the delivery direction of which is reversible.
- Radial piston pumps are characterized by their fast response times and their good controllability. Instead, axial piston or swash plate pumps can also be used.
- the retraction spaces of the cylinders of the pump units 1 and 2, like those of the pump units 3 and 4, are connected to the gas-pressurized liquid reservoirs 7 and 8, which maintain a constant pressure in the retreat spaces, which supports the return movement of the respective pistons.
- the pistons of the cylinder-piston units 1 and 2 follow the control of the pump unit 5 in their directions of movement and in the working speeds. If the pump unit is pumping to the right, pressure medium is extracted from cylinder 1, the piston moves outwards in the direction of the arrow shown. the piston of cylinder 2 in the direction of the arrow inwards.
- the lifting movements can be detected in a known manner by measuring devices 31, 32, 33, 34 which are attached to the forging tools.
- the signals from these measuring devices can also be used for rhythmic reversal.
- the safety valves 25, 26, 27 and 28 are provided on the main lines 21, 22, 23 and 24.
- the main lines are connected to a circuit with a filling line 29 which is fed by a pump 15 which is preloaded by a preload valve 16 .
- This separate circuit automatically adjusts the pressure medium when the safety valves respond or when a vacuum is created in the main lines 21, 22, 23 and 24 that would endanger the pump units 5 or 6.
- the piston surfaces of the cylinder pairs are usually the same size, so that the same stroke lengths and stroke speeds are produced in both directions.
- supply lines are provided on the pressure lines 21, 22, 23 and 24 via the three-way valves 14, 11, 12 and 13, which enable the liquid volume in the cylinders and thus the piston end positions to change.
- the three-way valves 11, 12, 13, and 14 are connected to a circuit with a control line 30, which is fed by a pump 9 with a preload valve 10.
- the three-way valves 14, 11, 12 or 13 are opened when the main lines are at a standstill, so that pressure medium can flow in or out.
- the cylinder-piston units 1 and £ move in opposite directions, for example, the eer unit 1 is moved back in the direction of the arrow, eas Dr ⁇ - ' vege valve 14 is connected to the tank in order to further shift the stroke of the piston 1 of unit 1 to the outside.
- the three-way valves are connected to the pump 9 in order to shift the stroke inwards.
- the cylinder-piston units 2 and 4 are combined to form a unit which is supplied by the pump units 5 and 6 at the same time.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Forging (AREA)
- External Artificial Organs (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE59505975T DE59505975D1 (de) | 1994-12-24 | 1995-10-27 | Doppelpresse |
| US08/702,475 US5732588A (en) | 1994-12-24 | 1995-10-27 | Double press |
| JP8520137A JPH09510145A (ja) | 1994-12-24 | 1995-10-27 | ダブルプレス |
| EP95937017A EP0751842B1 (de) | 1994-12-24 | 1995-10-27 | Doppelpresse |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4446580.7 | 1994-12-24 | ||
| DE4446580A DE4446580A1 (de) | 1994-12-24 | 1994-12-24 | Doppelpresse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1996020053A1 true WO1996020053A1 (de) | 1996-07-04 |
Family
ID=6537108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1995/004226 Ceased WO1996020053A1 (de) | 1994-12-24 | 1995-10-27 | Doppelpresse |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5732588A (de) |
| EP (1) | EP0751842B1 (de) |
| JP (1) | JPH09510145A (de) |
| AT (1) | ATE180187T1 (de) |
| DE (3) | DE4446580A1 (de) |
| WO (1) | WO1996020053A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2230622C1 (ru) * | 2002-10-31 | 2004-06-20 | Бодров Валерий Владимирович | Способ управления пульсаторным гидроприводом радиально-ковочной машины и радиально-ковочная машина |
| CN100335195C (zh) * | 2005-10-13 | 2007-09-05 | 上海交通大学 | 悬梁式双压力机并联组合锻压机 |
| CN100337769C (zh) * | 2005-10-13 | 2007-09-19 | 上海交通大学 | 滑块式双压力机并联组合锻压机 |
| JP5240467B2 (ja) * | 2009-03-18 | 2013-07-17 | トヨタ自動車株式会社 | プレス成形方法 |
| DE102011052733B4 (de) | 2011-08-16 | 2023-09-28 | Langenstein & Schemann Gmbh | Maschinenfundament, Verfahren zum Betrieb einer Umformmaschine und Umformanlage |
| EP2946850A1 (de) * | 2014-05-23 | 2015-11-25 | SMS Meer GmbH | Verfahren zum Schmieden eines metallischen Werkstücks |
| CN106623719B (zh) * | 2017-02-24 | 2019-04-26 | 王安基 | 锻造机构及锻机 |
| CN107225691A (zh) * | 2017-06-01 | 2017-10-03 | 成都贝施美生物科技有限公司 | 一种生产长桥义齿用瓷块等径加压工艺 |
| DE102022206855A1 (de) | 2022-06-30 | 2024-01-04 | Sms Group Gmbh | Schmiedestrategie SMX |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE492281A (de) * | ||||
| US3460370A (en) * | 1966-05-23 | 1969-08-12 | Bruno Kralowetz | Apparatus for swaging continuous stock |
| DE2030471A1 (de) * | 1969-06-27 | 1971-01-07 | Gesellschaft fur Fertigungstechnik u Maschinenbau GmbH Steyr (Osterreich) | Schmiedemaschine |
| DE1303852B (de) * | 1964-07-10 | 1973-07-05 | ||
| DE2951587A1 (de) * | 1979-12-21 | 1981-07-02 | Dango & Dienenthal Maschinenbau GmbH, 5900 Siegen | Schmiedemaschine |
| JPS62101301A (ja) * | 1985-10-28 | 1987-05-11 | Ishikawajima Harima Heavy Ind Co Ltd | スラブの成形装置 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT290255B (de) * | 1969-12-30 | 1971-05-25 | Ges Fertigungstechnik & Maschb | Schmiedemaschine |
| DE2149577A1 (de) * | 1971-10-05 | 1973-04-12 | Erich Ribback | Maschine zur spanlosen formgebung von metallen |
| DE2207717C3 (de) * | 1972-02-18 | 1975-10-16 | Maschinenfabrik Sack Gmbh, 4000 Duesseldorf | Steuereinrichtung mit hydraulischer Gleichlaufsteuerung für Schmiedemaschinen |
| DE2221341A1 (de) * | 1972-05-02 | 1973-11-15 | Schloemann Ag | Hydraulische schmiedemaschine zum ausschmieden von knueppeln oder dergleichen |
| SU479554A1 (ru) * | 1973-01-17 | 1975-08-05 | Рязанский Завод Тяжелого Кузнечнопрессового Оборудования | Радиально-ковочна машина |
| DE2306566C2 (de) * | 1973-02-10 | 1983-11-17 | Pahnke Engineering GmbH & Co KG, 4000 Düsseldorf | Hydraulischer Antrieb für Schmiedemaschinen |
| SU708589A1 (ru) * | 1976-06-17 | 1986-06-30 | Рязанский завод тяжелого кузнечно-прессового оборудования | Радиально-ковочна машина |
| SU1323194A1 (ru) * | 1986-03-07 | 1987-07-15 | Рязанский завод тяжелого кузнечно-прессового оборудования | Устройство дл контрол работы радиально-ковочной машины |
| DE3800220C1 (de) * | 1988-01-07 | 1989-02-02 | Pahnke Engineering Gmbh & Co Kg, 4000 Duesseldorf, De | |
| DE3803632A1 (de) * | 1988-02-06 | 1989-08-17 | Eumuco Ag Fuer Maschinenbau | Mehr-stoessel-schmiedemaschine |
-
1994
- 1994-12-24 DE DE4446580A patent/DE4446580A1/de not_active Withdrawn
-
1995
- 1995-10-21 DE DE29516647U patent/DE29516647U1/de not_active Expired - Lifetime
- 1995-10-27 EP EP95937017A patent/EP0751842B1/de not_active Expired - Lifetime
- 1995-10-27 AT AT95937017T patent/ATE180187T1/de active
- 1995-10-27 US US08/702,475 patent/US5732588A/en not_active Expired - Fee Related
- 1995-10-27 WO PCT/EP1995/004226 patent/WO1996020053A1/de not_active Ceased
- 1995-10-27 DE DE59505975T patent/DE59505975D1/de not_active Expired - Fee Related
- 1995-10-27 JP JP8520137A patent/JPH09510145A/ja active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE492281A (de) * | ||||
| DE1303852B (de) * | 1964-07-10 | 1973-07-05 | ||
| US3460370A (en) * | 1966-05-23 | 1969-08-12 | Bruno Kralowetz | Apparatus for swaging continuous stock |
| DE2030471A1 (de) * | 1969-06-27 | 1971-01-07 | Gesellschaft fur Fertigungstechnik u Maschinenbau GmbH Steyr (Osterreich) | Schmiedemaschine |
| DE2951587A1 (de) * | 1979-12-21 | 1981-07-02 | Dango & Dienenthal Maschinenbau GmbH, 5900 Siegen | Schmiedemaschine |
| JPS62101301A (ja) * | 1985-10-28 | 1987-05-11 | Ishikawajima Harima Heavy Ind Co Ltd | スラブの成形装置 |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 11, no. 316 (M - 631) 15 October 1987 (1987-10-15) * |
Also Published As
| Publication number | Publication date |
|---|---|
| US5732588A (en) | 1998-03-31 |
| EP0751842A1 (de) | 1997-01-08 |
| JPH09510145A (ja) | 1997-10-14 |
| EP0751842B1 (de) | 1999-05-19 |
| DE29516647U1 (de) | 1995-12-21 |
| ATE180187T1 (de) | 1999-06-15 |
| DE4446580A1 (de) | 1996-07-04 |
| DE59505975D1 (de) | 1999-06-24 |
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