EP0629455B1 - Main drive for upsetting press - Google Patents
Main drive for upsetting press Download PDFInfo
- Publication number
- EP0629455B1 EP0629455B1 EP94109153A EP94109153A EP0629455B1 EP 0629455 B1 EP0629455 B1 EP 0629455B1 EP 94109153 A EP94109153 A EP 94109153A EP 94109153 A EP94109153 A EP 94109153A EP 0629455 B1 EP0629455 B1 EP 0629455B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- working
- pressure medium
- hydraulic
- upsetting
- 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
Links
- 238000003860 storage Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims 1
- 238000005096 rolling process Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/22—Extrusion presses; Dies therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0035—Forging or pressing devices as units
-
- 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
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/163—Control arrangements for fluid-driven presses for accumulator-driven presses
Definitions
- the invention relates to a method for operating the pressing tools provided with hydraulic reduction drives of upsetting presses for rolling stock, the cylinders of the hydraulic reduction drives being integrated into a hydraulic circuit which has a working pump and to which a pressure accumulator is connected in parallel, and a compression press, as described in the preamble of Claim 3 is described.
- EP-PS 0 112 516 proposes e.g. already hydraulic reduction drives that directly generate linear movements, take up less space and are cheaper to produce. However, in order to be able to provide the power required for the reduction, relatively large, powerful and correspondingly energy-consuming pumps must be installed here.
- the generic GB-PS 2 016 980 therefore already suggests a pressure accumulator which is connected in parallel with the hydraulic circuit in order to support the drive of the cylinders caused by the working pumps, if necessary.
- the hydraulic circuit is an open circuit, in which large amounts of pressure medium flow and may have to be pumped out into a tank.
- the system according to DE-PS 2 016 980 thus has a very poor efficiency, has poor dynamic behavior due to the open circuit and is very expensive due to the large pumps required.
- DE-OS 23 45 527 similar to GB-PS 2 016 980, discloses a hydraulic press drive in which the press and return stroke cylinders as well as the working pumps interact via corresponding valves in an open hydraulic circuit. This results in the same disadvantages with this press drive as with the press drive according to GB-PS 2 016 980.
- the invention has for its object to further develop the generic method for operating the reduction drive of an upsetting press and the reduction drive itself so that it is possible to work with very inexpensive, relatively small and low-energy pumps.
- the arrangement of a pressure medium accumulator in the feed circuit means that the large pressure medium volumes from the press cylinder, which are not required for feeding the pumps and return stroke cylinders during the reverse stroke, are no longer drained into a tank, but are stored in the pressure medium accumulator, so that they can then be used when the press cylinders are fed to become.
- the adjustment speed can be adjusted during the forward stroke of the press cylinder at a specific volume flow given by the working pumps of the press cylinder can be increased.
- the increase in speed is only achieved for the idle stroke of the press cylinder, since the pressure of the pressure medium reservoir is not sufficient to make a significant contribution to the press stroke.
- the work pumps therefore do not need to be designed for the large volume flows that are required for rapid advancement of the press cylinder in the idle stroke and can therefore have smaller dimensions.
- the pump can also be equipped with a lower nominal output, since, due to the pressure medium accumulator, it is only operated in short-term operation.
- One half of an upsetting press 1 is shown in each of the figures.
- the second half, not shown, is in each case arranged in mirror image of the first half.
- Both halves are connected to one another via a synchronization control 2.
- the upsetting press 1 has a press tool 3 which is connected to a press cylinder 4 and two return stroke cylinders 5, 5 '. Furthermore, a feed cylinder 6 is shown, which when flying Operation drives the pressing tool 3 at the rolling stock speed in the longitudinal direction of the rolling stock.
- the pistons of the cylinders 4, 5, 5 ' are designed as plungers, the effective piston area of the press cylinder 4 being larger than the effective piston area of the two return stroke cylinders 5, 5'.
- the press cylinder 4 is connected to the return stroke cylinders 5, 5 'via working pumps 7, 7', 7 '', 7 '''.
- a piston accumulator is provided as the pressure medium accumulator 8 between the working pumps 7 to 7 '' 'and the press cylinder 4.
- Pressure accumulators 9 are assigned to the piston accumulator and contain a gas as a pressure cushion.
- the pressure medium reservoir 8 is connected to the feed circuit 11 via a reservoir metering valve 10.
- the storage metering valve 10 is regulated depending on the pressure of the press cylinder and, if necessary, time-dependent in its way.
- a pump metering valve 12 which is also controlled as a function of time and pressure, relieves the pressure on the feed circuit 11 via a cooler 13 to the tank 14. From the tank 14, the working pumps 7 to 7 '' 'can be fed via feed pumps 15, 15' to feed the press cylinder 4 pressure medium be fed.
- the synchronism of the two press halves can be controlled by means of a control device 2 (not shown) via a pump 16 and a compensating circuit 17.
- the accumulator metering valve is closed and the working pumps 7 to 7 '' 'alone, with a correspondingly reduced speed for the press stroke.
- the pressure medium reservoir 8 can also be filled by the working pumps 7 to 7 '' 'before the first working stroke.
- the drive according to FIG. 2 is very similar to that according to FIG. 1, so that only the differences are mentioned here.
- the working pumps 7 to 7 ′′ ′′ hydraulic motors 18 to 18 ′′ ′′ are connected in parallel.
- the hydraulic motors 18 to 18 '' ' like the pump metering valve 12 according to FIG. 1, are connected between the press cylinder 4 and the working pumps 7 to 7' '' to the feed circuit 11.
- the hydraulic motors 18 to 18 ''' are driven by the excess pressure medium when the press cylinder 4 is pushed back. Since they are coupled to the working pumps 7 to 7 ''', their drive motors are relieved, which results in further energy savings.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Control Of Presses (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Mechanical Operated Clutches (AREA)
- Metal Rolling (AREA)
- Forging (AREA)
- Vending Machines For Individual Products (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Betreiben der mit hydraulischen Reduktionsantrieben versehenen Preßwerkzeuge von Stauchpressen für Walzgut, wobei die Zylinder der hydraulischen Reduktionsantriebe in einen Hydraulikkreislauf eingebunden sind, der eine Arbeitspumpe aufweist und dem ein Druckspeicher parallelgeschaltet ist, sowie eine Stauchpresse, wie sie im Oberbegriff des Anspruchs 3 beschrieben ist.The invention relates to a method for operating the pressing tools provided with hydraulic reduction drives of upsetting presses for rolling stock, the cylinders of the hydraulic reduction drives being integrated into a hydraulic circuit which has a working pump and to which a pressure accumulator is connected in parallel, and a compression press, as described in the preamble of Claim 3 is described.
Es ist bekannt, Stauchpressen durch Elektromotoren über Getriebe und Exzenter anzutreiben. Für die Umsetzung der Rotationsbewegung in eine Linearbewegung sind entsprechend große Bauvolumina erforderlich. Hinzu kommen die sehr hohen Gestehungskosten für derartige Antriebe.It is known to drive upsetting presses by means of electric motors via gears and eccentrics. Correspondingly large construction volumes are required for converting the rotary movement into a linear movement. In addition, there are the very high production costs for such drives.
Die EP-PS 0 112 516 schlägt z.B. schon hydraulische Reduktionsantriebe vor, die direkt Linearbewegungen erzeugen, weniger Platz beanspruchen und günstiger zu erstellen sind. Um jedoch die zur Reduktion notwendige Leistung aufbringen zu können, müssen hier verhältnismäßig große, leistungsstarke und entsprechend viel Energie verbrauchende Pumpen installiert werden.EP-PS 0 112 516 proposes e.g. already hydraulic reduction drives that directly generate linear movements, take up less space and are cheaper to produce. However, in order to be able to provide the power required for the reduction, relatively large, powerful and correspondingly energy-consuming pumps must be installed here.
Die gattungsbildende GB-PS 2 016 980 schlägt daher bereits einen Druckspeicher vor, der dem Hydraulikkreislauf parallelgeschaltet ist, um bei Bedarf den durch die Arbeitspumpen bewirkten Antrieb der Zylinder zu unterstützen. Nachteilig ist dabei jedoch, daß es sich beim Hydraulikkreislauf um einen offenen Kreislauf handelt, bei dem große Mengen von Druckmedium fließen und gegebenenfalls in einen Tank abgepumpt werden muß. Die Anlage nach der DE-PS 2 016 980 weist damit einen sehr schlechten Wirkungsgrad auf, besitzt durch den offenen Kreislauf ein schlechtes dynamisches Verhalten und ist durch die notwendigen großen Pumpen sehr aufwendig.The generic GB-PS 2 016 980 therefore already suggests a pressure accumulator which is connected in parallel with the hydraulic circuit in order to support the drive of the cylinders caused by the working pumps, if necessary. However, it is disadvantageous that the hydraulic circuit is an open circuit, in which large amounts of pressure medium flow and may have to be pumped out into a tank. The system according to DE-PS 2 016 980 thus has a very poor efficiency, has poor dynamic behavior due to the open circuit and is very expensive due to the large pumps required.
Die DE-OS 23 45 527 offenbart ähnlich wie die GB-PS 2 016 980 einen hydraulischen Pressenantrieb, bei dem die Preß- und Rückhubzylinder sowie die Arbeitspumpen über entsprechende Ventile in einem offenen Hydraulikkreislauf zusammenwirken. Damit ergeben sich auch bei diesem Pressenantrieb die gleichen Nachteile wie beim Pressenantrieb nach der GB-PS 2 016 980.DE-OS 23 45 527, similar to GB-PS 2 016 980, discloses a hydraulic press drive in which the press and return stroke cylinders as well as the working pumps interact via corresponding valves in an open hydraulic circuit. This results in the same disadvantages with this press drive as with the press drive according to GB-PS 2 016 980.
Der Erfindung liegt die Aufgabe zugrunde, das gattungsgemäße Verfahren zum Betreiben des Reduktionsantriebes einer Stauchpresse sowie den Reduktionsantrieb selbst so weiterzubilden, daß mit sehr kostengünstigen, verhältnismäßig kleinen und wenig Energie benötigenden Pumpen gearbeitet werden kann.The invention has for its object to further develop the generic method for operating the reduction drive of an upsetting press and the reduction drive itself so that it is possible to work with very inexpensive, relatively small and low-energy pumps.
Diese Aufgabe wird verfahrensmäßig durch die Merkmale des Anspruchs 1 und vorrichtungsmäßig durch die Merkmale des Anspruchs 3 gelöst. Vorteilhafte Ausgestaltungen des Reduktionsantriebs sind den Merkmalen der Ansprüche 4 bis 9 zu entnehmen.This object is achieved in terms of the method by the features of claim 1 and in terms of the device by the features of claim 3. Advantageous refinements of the reduction drive can be found in the features of claims 4 to 9.
Die Anordnung eines Druckmittelspeichers im Vorschubkreis bewirkt, daß die großen Druckmittelvolumina aus dem Preßzylinder, die beim Rückwärtshub nicht zur Speisung der Pumpen und Rückhubzylinder benötigt werden, nicht mehr ungenutzt in einen Tank abgelassen, sondern im Druckmittelspeicher gespeichert werden, um anschließend beim Vorschub der Preßzylinder eingesetzt zu werden.The arrangement of a pressure medium accumulator in the feed circuit means that the large pressure medium volumes from the press cylinder, which are not required for feeding the pumps and return stroke cylinders during the reverse stroke, are no longer drained into a tank, but are stored in the pressure medium accumulator, so that they can then be used when the press cylinders are fed to become.
Durch den Volumenstrom des Druckmittels aus dem Druckmittelspeicher kann während des Vorwärtshubs des Preßzylinders bei einem bestimmten durch die Arbeitspumpen gegebenen Volumenstrom die Verstellgeschwindigkeit des Preßzylinders erhöht werden. Die Erhöhung der Geschwindigkeit wird jedoch nur für den Leerhub des Preßzylinders erreicht, da der Druck des Druckmittelspeichers nicht ausreicht, auch noch wesentlich zum Preßhub beizutragen.Due to the volume flow of the pressure medium from the pressure medium reservoir, the adjustment speed can be adjusted during the forward stroke of the press cylinder at a specific volume flow given by the working pumps of the press cylinder can be increased. However, the increase in speed is only achieved for the idle stroke of the press cylinder, since the pressure of the pressure medium reservoir is not sufficient to make a significant contribution to the press stroke.
Die Arbeitspumpen brauchen daher nicht auf die großen Volumenströme, die für ein schnelles Vorbewegen des Preßzylinders im Leerhub benötigt werden, ausgelegt zu werden und können damit kleinere Abmessungen aufweisen.The work pumps therefore do not need to be designed for the large volume flows that are required for rapid advancement of the press cylinder in the idle stroke and can therefore have smaller dimensions.
Die Pumpe kann zudem mit geringerer Nennleistung ausgestattet werden, da sie, bewirkt durch den Druckmittelspeicher, nur im Kurzzeit-Betrieb gefahren wird.The pump can also be equipped with a lower nominal output, since, due to the pressure medium accumulator, it is only operated in short-term operation.
Ausführungsbeispiele der Erfindung werden nachfolgend anhand von Zeichnungen näher beschrieben. Dabei zeigen
- Figur 1
- eine Schemadarstellung des erfindungsgemäßen Stauchpressenreduktionsantriebs mit halbgeschlossenem Kreislaufsystem und Pumpendosierung, und
- Figur 2
- eine Schemadarstellung des erfindungsgemäßen Stauchpressenreduktionsantriebs mit halbgeschlossenem Kreislaufsystem und Hydromotoren-Volumenstromkompensation.
- Figure 1
- a schematic representation of the upsetting press reduction drive according to the invention with a semi-closed circuit system and pump metering, and
- Figure 2
- a schematic representation of the upsetting press reduction drive according to the invention with a semi-closed circuit system and hydraulic motor volume flow compensation.
In den Fig. ist jeweils eine Hälfte einer Stauchpresse 1 dargestellt. Die zweite nicht gezeigte Hälfte ist jeweils spiegelbildlich zu der ersten Hälfte angeordnet. Beide Hälften sind über eine Gleichlaufregelung 2 miteinander verbunden.One half of an upsetting press 1 is shown in each of the figures. The second half, not shown, is in each case arranged in mirror image of the first half. Both halves are connected to one another via a synchronization control 2.
Nach Fig. 1 weist die Stauchpresse 1 ein Preßwerkzeug 3 auf, das mit einem Preßzylinder 4 und zwei Rückhubzylindern 5, 5' verbunden ist. Weiterhin ist ein Vorschubzylinder 6 gezeigt, der beim fliegenden Betrieb das Preßwerkzeug 3 mit Walzgutgeschwindigkeit in Walzgutlängsrichtung antreibt. Die Kolben der Zylinder 4, 5, 5' sind als Plunger ausgeführt, wobei die wirksame Kolbenfläche des Preßzylinders 4 größer als die wirksame Kolbenfläche der beiden Rückhubzylinder 5, 5' ist. der Preßzylinder 4 ist mit den Rückhubzylindern 5, 5' über Arbeitspumpen 7, 7', 7'', 7''' verbunden.1, the upsetting press 1 has a press tool 3 which is connected to a press cylinder 4 and two
Zwischen den Arbeitspumpen 7 bis 7''' und dem Preßzylinder 4 ist als Druckmittelspeicher 8 ein Kolbenspeicher vorgesehen. Dem Kolbenspeicher sind Druckspeicher 9 zugeordnet, die ein Gas als Druckpolster enthalten. Der Druckmittelspeicher 8 ist über ein Speicher-Dosierventil 10 mit dem Vorschubkreis 11 verbunden. Das Speicher-Dosierventil 10 wird in Abhängigkeit des Preßzylinderdrucks und gegebenenfalls zeitabhängig in seinem Weg geregelt.A piston accumulator is provided as the pressure medium accumulator 8 between the working
Ein ebenfalls zeit- und druckabhängig geregeltes Pumpendosierventil 12 sorgt für eine Entlastung des Vorschubkreises 11 über einen Kühler 13 zum Tank 14. Aus dem Tank 14 kann über Speisepumpen 15, 15' den Arbeitspumpen 7 bis 7''' für den Vorschub des Preßzylinders 4 Druckmittel zugeführt werden. Über eine Pumpe 16 und einen Ausgleichskreis 17 kann mittels der nicht dargestellten Regelvorrichtung 2 der Gleichlauf der beiden Pressenhälften geregelt werden.A
Der Antrieb nach Fig. 1 arbeitet wie folgt: Ausgehend vom letzten Preßhub (d.h. der Plunger des Preßzylinders 4 steht in seiner vorderen Position) werden die Pumpen 7 bis 7''' über Null umgestellt, so daß die Rückhubzylinder 5, 5' mit Druckmittel beaufschlagt werden. Dadurch wird aus dem Preßzylinder 4 Druckmittel ausgeschoben. Aufgrund der unterschiedlich großen wirksamen Flächen der Plunger des Preßzylinders 4 gegenüber der Plunger der Rückhubzylinder 5, 5' wird jedoch erheblich mehr Druckmittel aus dem Preßzylinder 4 ausgeschoben, als zum Antreiben der Plunger der Rückhubzylinder 5, 5' benötigt wird. Das überschüssige Druckmittel wird über das geöffnete Speicher-Dosierventil 10 auf den Druckmittelspeicher 8 gegeben. Ist dieser gefüllt, aber auch gegebenenfalls schon während des Füllvorgangs wird das Pumpendosierventil 12 geöffnet, um weiteres überschüssiges Druckmittel über den Kühler 13 an den Tank 14 abzuführen.1 operates as follows: starting from the last press stroke (ie the plunger of the press cylinder 4 is in its forward position), the
Haben die Plunger der Rückhubzylinder 5, 5' ihre vordere Position erreicht, so werden die Arbeitspumpen 7 bis 7''' über Null in die entgegengesetzte Förderrichtung geschaltet. Gleichzeitig wird das Speicherdosierventil geöffnet, so daß die Arbeitspumpen 7 bis 7''' bei geschlossenem Pumpendosierventil 12 von den Rückhubzylindern 5, 5' und den Speisepumpen 15, 15' und gleichzeitig vom Druckmittelspeicher 8 Druckmittel zum Preßzylinder 4 gefördert wird. Durch diesen großen Volumenstrom fährt der Plunger des Preßzylinders 4 schnell vorwärts. Sobald jedoch das Werkzeug 1 der Stauchpresse das Walzgut erreicht hat, steigt der Druck am Preßzylinder 4. Übersteigt dieser Druck den Druck des Druckmittelspeichers 8, so wird das Speicherdosierventil geschlossen und die Arbeitspumpen 7 bis 7''' sorgen, mit entsprechend verminderter Geschwindigkeit, allein für den Preßhub. Das Füllen des Druckmittelspeichers 8 kann bei geöffneter Stauchpresse 1 vor dem ersten Arbeitshub auch durch die Arbeitspumpen 7 bis 7''' erfolgen.When the plungers of the
Der Antrieb nach Figur 2 ist demjenigen nach Fig. 1 sehr ähnlich, so daß hier nur noch die Unterschiede erwähnt werden. Anstelle des Pumpendosierventils 12 sind den Arbeitspumpen 7 bis 7''' Hydromotoren 18 bis 18''' parallelgeschaltet. Die Hydromotoren 18 bis 18''' sind wie auch das Pumpendosierventil 12 nach Fig. 1 zwischen Preßzylinder 4 und den Arbeitspumpen 7 bis 7''' an den Vorschubkreis 11 angeschlossen. Der jeweils zweite Anschluß der Hydromotoren 18 bis 18''' geht über den Kühler 13 zum Tank 14.The drive according to FIG. 2 is very similar to that according to FIG. 1, so that only the differences are mentioned here. Instead of the
Die Hydromotoren 18 bis 18''' werden beim Zurückschieben des Preßzylinders 4 von dem überschießenden Druckmittel angetrieben. Da sie mit den Arbeitspumpen 7 bis 7''' gekoppelt sind, werden deren Antriebsmotoren entlastet, wodurch eine weitere Energieeinsparung gegeben ist.The
- 11
- StauchpresseUpset press
- 22nd
- GleichlaufregelungSynchronization control
- 33rd
- PreßwerkzeugPress tool
- 44th
- PreßzylinderPress cylinder
- 5, 5'5, 5 '
- RückhubzylinderReturn stroke cylinder
- 66
- VorschubzylinderFeed cylinder
- 7-7'''7-7 '' '
- ArbeitspumpenWorking pumps
- 88th
- DruckmittelspeicherPressure fluid accumulator
- 99
- DruckspeicherPressure accumulator
- 1010th
- Speicher-DosierventilStorage metering valve
- 1111
- VorschubkreisFeed circle
- 1212th
- Pumpen-DosierventilPump metering valve
- 1313
- Kühlercooler
- 1414
- Tanktank
- 15, 15'15, 15 '
- SpeisepumpenFeed pumps
- 1616
- Pumpepump
- 1717th
- AusgleichskreisCompensation circle
- 18-18'''18-18 '' '
- HydromotorenHydraulic motors
Claims (9)
- Method of operating the press tools (3), which are provided with hydraulic reduction drives, of upsetting presses (1) for stock to be rolled, wherein the cylinders (4, 5) of the hydraulic reduction drives are incorporated in a hydraulic circuit which comprises a working pump (7 to 7''') and to which a pressure storage device (9) is connected in parallel, characterised thereby that the return strokes of the reduction drives, which together with the working pumps (7 to 7''') and return stroke cylinders (5, 5') form a substantially closed hydraulic circuit, are effected by the working pumps (7 to 7'''), wherein the pressure medium expelled from the press cylinders (4) of the reduction drive is taken over into the pressure medium storage device (8), and that the pressure medium from the pressure medium storage device (8) works in parallel to the working pumps (7 to 7''') for the forward strokes at least until contact of the press tools (3) with the stock to be rolled.
- Method according to claim 1, characterised by a regulation of the synchronism between the two hydraulic reduction drives.
- Upsetting press (1) for reduction of the width of stock to be rolled, wherein press tools (3) arranged at both sides of the stock to be rolled each have hydraulic reduction drives, which effect a movement of the press tools (3) substantially towards or away from one another, the upsetting press (1) in a given case comprises advancing drives (6) which are able to drive the press tools (3) in direction of advance of the stock to be rolled, and the cylinders (4, 5) of the hydraulic reduction drive are incorporated into a hydraulic circuit which comprises a working pump (7 to 7''') and to which a pressure storage device (9) is connected in parallel, characterised thereby that each reduction drive comprises at least one press cylinder (4) which is known in itself and which together with at least one working pump (7 to 7''') and at least one return stroke cylinder is connected into a substantially closed hydraulic circuit, and that a pressure medium storage device (8) provided in parallel to the working pump (7 to 7''') is connected with this and the press cylinder (4) by way of a valve, preferably a storage/metering valve (10).
- Upsetting press according to claim 3, characterised thereby that the effective pressure area of the pistons of the return stroke cylinders (5, 5') is smaller than the effective pressure area of the pistons of the press cylinders (4).
- Upsetting press according to claim 4, characterised thereby that travel transmitters for pick-up of actual travel values are associated with the press tools (3), that the travel transmitter is connected with a regulating device (2) for synchronising regulation between the two press tools and that the regulating device (2) operates on a pump (16) for the synchronising regulation.
- Upsetting press according to claim 5, characterised thereby that the working pumps (7 to 7''') of the press cylinders (4) and the return stroke cylinders (5, 5') form a drive circuit, with which is associated at least one supply pump (15, 15') by way of which a pressure medium loss is compensated for and in a given case pressure medium needed for the circuit is supplied.
- Upsetting press according to claim 6, characterised thereby that the working pump (7 to 7''') in the advancing circuit (11) is connected in parallel with a pump metering valve (12), which is preferably controlled in dependence on pressure and by way of which pressure medium can be supplied to a cooler (13) and subsequently to a tank (14).
- Upsetting press according to claim 6, characterised thereby that adjustable hydraulic motors (18 to 18'''), the hydraulic connections of which lie in the advancing circuit (11) between the working pumps (7 to 7''') and the press cylinder (4) and which on the other hand are connected with the tank (14) in a given case by way of a cooler (13), are coupled to the working pumps (7 to 7''').
- Upsetting press according to at least one of claims 1 to 8, characterised thereby that pumps adjustable beyond zero find use as working pumps (7 to 7''').
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4320213 | 1993-06-18 | ||
| DE4320213A DE4320213A1 (en) | 1993-06-18 | 1993-06-18 | Pressing main drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0629455A1 EP0629455A1 (en) | 1994-12-21 |
| EP0629455B1 true EP0629455B1 (en) | 1997-02-12 |
Family
ID=6490623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94109153A Expired - Lifetime EP0629455B1 (en) | 1993-06-18 | 1994-06-15 | Main drive for upsetting press |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5551276A (en) |
| EP (1) | EP0629455B1 (en) |
| JP (1) | JP3459297B2 (en) |
| KR (1) | KR100326648B1 (en) |
| CN (1) | CN1057031C (en) |
| AT (1) | ATE148840T1 (en) |
| DE (2) | DE4320213A1 (en) |
| FI (1) | FI105896B (en) |
| TW (1) | TW241212B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6054076A (en) * | 1998-04-02 | 2000-04-25 | Graham Engineering Corporation | Accumulator head blow molding machine and method |
| US6120712A (en) * | 1998-05-07 | 2000-09-19 | Graham Engineering Corporation | Accumulator head blow molding machine and method |
| ATE444157T1 (en) * | 2000-09-20 | 2009-10-15 | Laeis Gmbh | CONTROL DEVICE FOR A HYDRAULIC PRESS AND METHOD FOR OPERATING THE SAME |
| KR100790842B1 (en) * | 2007-03-30 | 2008-01-03 | 장세창 | Case for rice scoop |
| CN102078911A (en) * | 2010-12-06 | 2011-06-01 | 中国重型机械研究院有限公司 | Quick return system for quick forging oil press |
| CN102699249A (en) * | 2012-05-28 | 2012-10-03 | 天津市天锻压力机有限公司 | Quick forging press control system with energy accumulator and control method of quick forging press control system |
| CN103286251A (en) * | 2013-05-17 | 2013-09-11 | 天津市天锻压力机有限公司 | Oil supply system of hydraulic forging press |
| ITRE20140004U1 (en) * | 2014-03-04 | 2015-09-04 | Bonfiglioli Cesare | SCRAP COMPACTING MACHINE |
| CN108421945A (en) * | 2018-04-10 | 2018-08-21 | 中科聚信洁能热锻装备研发股份有限公司 | A kind of hydraulic forging press of continuous supercharging fuel feeding |
| CN108663150B (en) * | 2018-05-10 | 2024-07-30 | 温州大学 | Novel cold heading force measuring method and force measuring device applying same |
| IT201800007019A1 (en) * | 2018-07-09 | 2020-01-09 | FLUID DYNAMIC SYSTEM FOR THE CONTROLLED OPERATION OF THE SLIDE OF A PRESS |
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| BE559440A (en) * | 1956-07-23 | |||
| DE1266111B (en) * | 1958-11-25 | 1968-04-11 | Schloemann Ag | Control of a hydraulic open-die forging press |
| DE2345527A1 (en) * | 1973-09-10 | 1975-03-20 | Schirmer & Plate | HORIZONTAL HIGH SPEED FORGING PRESS |
| DE2607762A1 (en) * | 1976-02-26 | 1977-09-01 | Smg Sueddeutsche Maschinenbau | HYDRAULIC PRESS |
| JPS5938067B2 (en) * | 1976-11-09 | 1984-09-13 | 三菱重工業株式会社 | Pressure supply device for pressure switching valve to mold clamping cylinder |
| DE2747548C2 (en) * | 1977-10-22 | 1986-04-17 | Thyssen Industrie Ag, 4300 Essen | Press with control circuit |
| GB2016980A (en) * | 1978-01-31 | 1979-10-03 | B & G Hydraulics Ltd | Apparatus for operating hydraulic rams |
| DE2852303A1 (en) * | 1978-12-02 | 1980-06-04 | Schloemann Siemag Ag | FORGING PRESS, IN PARTICULAR FREE-FORMING FORGING PRESS, UNDERFLOOR |
| US4206628A (en) * | 1979-03-16 | 1980-06-10 | The Continental Group, Inc. | Press with hydraulic load transferring mechanism |
| DE3376530D1 (en) * | 1982-12-01 | 1988-06-16 | Hitachi Ltd | Press apparatus for reducing slab width |
| SE437861B (en) * | 1983-02-03 | 1985-03-18 | Goran Palmers | DEVICE FOR MEDIUM HYDRAULIC CYLINDER OPERATED MACHINERY WITH ONE OF A DRIVE CELL THROUGH AN ENERGY CUMULATOR DRIVE PUMP |
| DE9116370U1 (en) * | 1991-09-27 | 1992-12-03 | Pahnke Engineering GmbH & Co KG, 4000 Düsseldorf | Device for operating a press system |
| JPH05104299A (en) * | 1991-10-16 | 1993-04-27 | Kawasaki Yukou Kk | Method for controlling oil pressure of hydraulic press |
| DE4210504A1 (en) * | 1992-03-31 | 1993-10-07 | Pahnke Eng Gmbh & Co Kg | Method for drive control for hydraulic press - blocks pressure medium flow to retraction cylinders after working stroke, to prevent return stroke |
-
1993
- 1993-06-18 DE DE4320213A patent/DE4320213A1/en not_active Withdrawn
-
1994
- 1994-06-09 TW TW083105261A patent/TW241212B/zh active
- 1994-06-15 KR KR1019940013519A patent/KR100326648B1/en not_active IP Right Cessation
- 1994-06-15 AT AT94109153T patent/ATE148840T1/en not_active IP Right Cessation
- 1994-06-15 EP EP94109153A patent/EP0629455B1/en not_active Expired - Lifetime
- 1994-06-15 DE DE59401791T patent/DE59401791D1/en not_active Expired - Fee Related
- 1994-06-16 JP JP13458194A patent/JP3459297B2/en not_active Expired - Fee Related
- 1994-06-16 FI FI942867A patent/FI105896B/en active
- 1994-06-18 CN CN94106800A patent/CN1057031C/en not_active Expired - Fee Related
- 1994-06-29 US US08/263,614 patent/US5551276A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015110768A1 (en) * | 2015-07-03 | 2017-01-05 | Sms Group Gmbh | Oil-hydraulic extrusion press and method for operating such an extruder |
| WO2017005245A1 (en) | 2015-07-03 | 2017-01-12 | Sms Group Gmbh | Hydraulic machine unit and method for operating such a machine unit |
| US11358359B2 (en) | 2015-07-03 | 2022-06-14 | Sms Group Gmbh | Hydraulic machine unit and method for operating such a machine unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07144205A (en) | 1995-06-06 |
| EP0629455A1 (en) | 1994-12-21 |
| KR950000373A (en) | 1995-01-03 |
| DE59401791D1 (en) | 1997-03-27 |
| ATE148840T1 (en) | 1997-02-15 |
| US5551276A (en) | 1996-09-03 |
| CN1098343A (en) | 1995-02-08 |
| KR100326648B1 (en) | 2002-06-20 |
| FI942867A (en) | 1994-12-19 |
| FI105896B (en) | 2000-10-31 |
| DE4320213A1 (en) | 1994-12-22 |
| TW241212B (en) | 1995-02-21 |
| JP3459297B2 (en) | 2003-10-20 |
| FI942867A0 (en) | 1994-06-16 |
| CN1057031C (en) | 2000-10-04 |
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