EP0629455A1 - Main drive for upsetting press - Google Patents
Main drive for upsetting press Download PDFInfo
- Publication number
- EP0629455A1 EP0629455A1 EP94109153A EP94109153A EP0629455A1 EP 0629455 A1 EP0629455 A1 EP 0629455A1 EP 94109153 A EP94109153 A EP 94109153A EP 94109153 A EP94109153 A EP 94109153A EP 0629455 A1 EP0629455 A1 EP 0629455A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- pressure medium
- working
- pumps
- 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.)
- Granted
Links
- 238000003825 pressing Methods 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims 2
- 230000001360 synchronised effect Effects 0.000 claims 2
- 230000001419 dependent effect Effects 0.000 claims 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 for upsetting presses for rolling stock and to an upsetting press as described in the preamble of claim 3.
- 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 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 unused, but are stored in the pressure medium accumulator, so that they can then be used during the feed of the press cylinders to become.
- the adjustment speed of the pressure cylinder can be increased during the forward stroke of the press cylinder at a certain volume flow given by the working pumps.
- 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 drives the pressing tool 3 at the speed of the rolling stock in the longitudinal direction of the rolling stock during flying operation.
- 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 10 via a cooler 13 to the tank 14 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 pressure on the press cylinder 4 rises If this pressure is the pressure of the pressure medium accumulator 8, the accumulator metering valve is closed and the working pumps 7 to 7 '''provide, with a correspondingly reduced speed, only for the press stroke. With the upset press 1 open, 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 to the feed circuit 11 between the press cylinder 4 and the working pumps 7 to 7 ′′ ′′.
- 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.
- FIG. 3 is also very similar to that of FIG. 1. Here, however, an open circle is used.
- the working pumps 19 to 19 '''are also adjustable, but not adjustable above zero; ie they only promote in one direction.
- the pumps 19 to 19 '''are connected to the tank 14 and on the other hand via switching valves 20, 21 to the return stroke circuit and the feed circuit 11.
- a drain valve 22 is provided in the return circuit, which opens in order to discharge the pressure medium ejected from the return stroke cylinders 5, 5 'into the tank 14 when the press cylinder 4 is advanced.
- the switching valves 20, 21 are locked against each other, so that only the press cylinder 4 or the push-back cylinders 5, 5 'are acted upon by pressure medium.
- the working pumps 19 to 19 ′′ ′′ become zero adjusted so that the switching valves 20, 21 are not loaded too heavily.
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)
- Portable Nailing Machines And Staplers (AREA)
- Vending Machines For Individual Products (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Betreiben der mit hydraulischen Reduktionsantrieben versehenen Preßwerkzeuge von Stauchpressen für Walzgut 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 for upsetting presses for rolling stock and to an upsetting press as described in the preamble of claim 3.
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.
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 10 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
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 unused, but are stored in the pressure medium accumulator, so that they can then be used during the feed of the press cylinders 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 store, the adjustment speed of the pressure cylinder can be increased during the forward stroke of the press cylinder at a certain volume flow given by the working pumps. 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,
Figur 2- eine Schemadarstellung des erfindungsgemäßen Stauchpressenreduktionsantriebs mit halbgeschlossenem Kreislaufsystem und Hydromotoren-Volumenstromkompensation und
- Figur 3
- eine Schemadarstellung des erfindungsgemäßen Stauchpressenantriebes mit offenem Kreislaufsystem.
- Figure 1
- 2 shows a schematic representation of the upsetting press reduction drive according to the invention with a semi-closed circuit system and pump metering,
- Figure 2
- a schematic representation of the compression press reduction drive according to the invention with a semi-closed circuit system and hydraulic motor volume flow compensation and
- Figure 3
- a schematic representation of the upsetting press drive according to the invention with an open circuit system.
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
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
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
Ein ebenfalls zeit- und druckabhängig geregeltes Pumpendosierventil 12 sorgt für eine Entlastung des Vorschubkreises 10 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
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
Der Antrieb nach Fig. 3 ist ebenfalls sehr ähnlich dem von Fig. 1. Hier wird jedoch mit einem offenen Kreis gearbeitet. Die Arbeitspumpen 19 bis 19''' sind ebenfalls regelbar, jedoch nicht über Null verstellbar; d.h. sie fördern nur in einer Richtung. Einerseits sind die Pumpen 19 bis 19''' mit dem Tank 14 und andererseits über Schaltventile 20, 21 mit dem Rückhubkreis und dem Vorschubkreis 11 verbunden. Im Rückschubkreis ist ein Abflußventil 22 vorgesehen, welches öffnet, um beim Vorschub des Preßzylinders 4 das aus den Rückhubzylindern 5, 5' ausgeschobene Druckmittel in den Tank 14 abzuleiten. Die Schaltventile 20, 21 sind gegeneinander verriegelt, so daß immer nur der Preßzylinder 4 oder aber die Rückschubzylinder 5, 5' mit Druckmittel beaufschlagt werden. Zum Umschalten der Schaltventile 20, 21 werden die Arbeitspumpen 19 bis 19''' auf Null verstellt, so daß die Schaltventile 20, 21 nicht zu stark belastet werden.3 is also very similar to that of FIG. 1. Here, however, an open circle is used. The working
- 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
- 19-19'''19-19 '' '
- ArbeitspumpenWorking pumps
- 2020th
- SchaltventilSwitching valve
- 2121
- SchaltventilSwitching valve
- 2222
- AblaufventilDrain valve
Claims (10)
dadurch gekennzeichnet,
daß die Rückhübe der Reduktionsantriebe durch Arbeitspumpen (7 - 7''' und 19 - 19''') bewirkt werden, wobei das aus den Preßzylindern (4) des Reduktionsantriebes verdrängte Druckmittel im Druckmittelspeicher (8) übernommen wird, und daß für die Vorwärtshübe zumindest bis zum Anlegen der Preßwerkzeuge (3) an das Walzgut das Druckmittel aus dem Druckmittelspeichern (8) parallel zu den Arbeitspumpen (7 - 7'''; 19 - 19''') arbeitet.Method for operating the compression tools of upsetting presses for rolling stock provided with hydraulic reduction drives,
characterized,
that the return strokes of the reduction drives are effected by working pumps (7 - 7 '''and 19 - 19'''), the pressure medium displaced from the press cylinders (4) of the reduction drive being taken over in the pressure medium reservoir (8), and that for the forward strokes at least until the pressing tools (3) are placed against the rolling stock, the pressure medium from the pressure medium storage (8) works parallel to the working pumps (7-7 ''';19-19''').
gekennzeichnet durch
eine Regelung des Gleichlaufs zwischen den beiden hydraulischen Reduktionsantrieben.Method according to claim 1,
marked by
a control of the synchronism between the two hydraulic reduction drives.
wobei beidseitig des Walzgutes angeordnete Preßwerkzeuge jeweils hydraulische Reduktionsantriebe aufweisen, die eine Bewegung der Preßwerkzeuge im wesentlichen aufeinander zu bzw. voneinander weg bewirken und die Stauchpresse gegebenenfalls Vorschubantriebe aufweist, welche die Preßwerkzeuge in Richtung des Walzgutvorschubes anzutreiben vermögen,
dadurch gekennzeichnet,
daß jeder Reduktionsantrieb wie an sich bekannt mindestens einen Preßzylinder (4) aufweist, der mit mindestens einer Arbeitspumpe (7 - 7'''; 19 - 19''') verbunden ist, und daß ein parallel zur Arbeitspumpe (7 - 7'''; 19 - 19''') vorgesehener Druckmittelspeicher (8) über ein Ventil, vorzugsweise Speicher-Dosierventil (10) mit dieser und dem Preßzylinder (4) verbunden ist.Upsetting press to reduce the width of rolled material,
wherein pressing tools arranged on both sides of the rolling stock each have hydraulic reduction drives which essentially cause the pressing tools to move towards and away from one another and the upsetting press optionally has feed drives which are able to drive the pressing tools in the direction of the rolling stock feed,
characterized,
that each reduction drive, as known per se, has at least one press cylinder (4) which is connected to at least one working pump (7 - 7 '''; 19 - 19'''), and that one parallel to the working pump (7 - 7 '''; 19 - 19''') provided pressure medium accumulator (8) via a valve, preferably accumulator metering valve (10) with this and the press cylinder (4) is connected.
dadurch gekennzeichnet,
daß jeder Reduktionsantrieb mindestens einen Rückhubzylinder (5, 5') aufweist, der mit der Arbeitspumpe (7 - 7'''; 19 - 19''') verbunden ist, und daß die wirksame Druckfläche der Kolben der Rückhubzylinder (5, 5') kleiner als die wirksame Druckfläche der Kolben der Preßzylinder (4) ist.Upsetting press according to claim 3,
characterized,
that each reduction drive has at least one return stroke cylinder (5, 5 '), which is connected to the working pump (7 - 7'''; 19 - 19 '''), and that the effective pressure surface of the pistons of the return stroke cylinders (5, 5' ) is smaller than the effective pressure area of the pistons of the press cylinder (4).
dadurch gekennzeichnet,
daß den Preßwerkzeugen (3) Weggeber zur Aufnahme von Wegistwerten zugeordnet sind, daß die Weggeber mit einer Regelvorrichtung (2) zur Gleichlaufregelung zwischen den beiden Preßwerkzeugen verbunden ist und daß die Regelvorrichtung (2) auf eine Pumpe (16) zur Gleichlaufregelung arbeitet.Upsetting press according to claim 4,
characterized,
that the pressing tools (3) are assigned displacement sensors for recording actual travel values, that the displacement sensors are connected to a control device (2) for synchronous control between the two pressing tools and that the regulating device (2) works on a pump (16) for synchronous control.
dadurch gekennzeichnet,
daß die Arbeitspumpe (7 - 7'''; 19 - 19''') der Preßzylinder (4) und die Rückhubzylinder (5, 5') einen Antriebskreis bilden, dem mindestens eine Speisepumpe (15, 15') zugeordnet ist, über die ein Druckmittelverlust ausgeglichen und gegebenenfalls für den Kreislauf notwendiges Druckmittel zugeführt wird.Upsetting press according to claim 5,
characterized,
that the working pump (7 - 7 '''; 19 - 19''') of the press cylinder (4) and the return stroke cylinder (5, 5 ') form a drive circuit to which at least one feed pump (15, 15') is assigned, via which compensates for a loss of pressure medium and, if necessary, pressure medium required for the circuit is supplied.
dadurch gekennzeichnet,
daß der Arbeitspumpe (7 - 7'''; 19 - 19''') im Vorschubkreis (11) ein vorzugsweise druckabhängig gesteuertes Pumpendosierventil (12) parallelgeschaltet ist, über das Druckmittel einem Kühler (13) und anschließend einem Tank (14) zuführbar ist.Upsetting press according to claim 6,
characterized,
that the working pump (7 - 7 '''; 19 - 19''') in the feed circuit (11) is connected in parallel with a preferably pressure-dependent controlled pump metering valve (12), can be supplied to a cooler (13) and then to a tank (14) via the pressure medium is.
dadurch gekennzeichnet,
daß an den Arbeitspumpen (7 - 7''') verstellbare Hydromotoren (18 - 18''') angekoppelt sind, deren hydraulischen Anschlüsse zwischen den Arbeitspumpen (7 - 7''') und dem Preßzylinder (4) im Vorschubkreis (11) liegen, und die andererseits, gegebenenfalls über einen Kühler (13) mit dem Tank (14) verbunden sind.Upsetting press according to claim 6,
characterized,
that adjustable hydraulic motors (18 - 18 ''') are coupled to the working pumps (7 - 7'''), the hydraulic connections between the working pumps (7 - 7 ''') and the press cylinder (4) in the feed circuit (11) lie, and on the other hand, optionally connected to the tank (14) via a cooler (13).
dadurch gekennzeichnet,
daß als Arbeitspumpen (7 - 7''') über Null verstellbare Pumpen Anwendung finden.Upsetting press according to at least one of Claims 1 to 8,
characterized,
that can be used as working pumps (7 - 7 ''') via zero adjustable pumps.
dadurch gekennzeichnet,
daß als Arbeitspumpen (19 - 19''') verstellbare Pumpen Anwendung finden, und daß im Vorschub- und Rückschubkreis Schaltventile (20, 21) vorgesehen sind, die vorzugsweise gegeneinander verriegelt sind.Upsetting press according to claim 6,
characterized,
that adjustable pumps are used as working pumps (19 - 19 '''), and that switching valves (20, 21) are provided in the feed and return circuit, which are preferably locked against one another.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4320213A DE4320213A1 (en) | 1993-06-18 | 1993-06-18 | Pressing main drive |
| DE4320213 | 1993-06-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0629455A1 true EP0629455A1 (en) | 1994-12-21 |
| EP0629455B1 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) |
Cited By (4)
| 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 |
| 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 |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030032042A (en) * | 2000-09-20 | 2003-04-23 | 래이스 부커 게엠베하 | Controller for a hydraulic press and method for the operation thereof |
| KR100790842B1 (en) * | 2007-03-30 | 2008-01-03 | 장세창 | Case for rice scoop |
| 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 |
| DE102015110768A1 (en) * | 2015-07-03 | 2017-01-05 | Sms Group Gmbh | Oil-hydraulic extrusion press and method for operating such an extruder |
| 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 |
| 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 | |||
| FR2243038A1 (en) * | 1973-09-10 | 1975-04-04 | Schirmer & Plate | |
| US4125010A (en) * | 1976-02-26 | 1978-11-14 | Smg-Suddeutsche Maschinenbau Gmbh | Hydraulic press |
| GB2016980A (en) * | 1978-01-31 | 1979-10-03 | B & G Hydraulics Ltd | Apparatus for operating hydraulic rams |
| US4206628A (en) * | 1979-03-16 | 1980-06-10 | The Continental Group, Inc. | Press with hydraulic load transferring mechanism |
| EP0116024A1 (en) * | 1983-02-03 | 1984-08-15 | Göran Palmers | An energy recovery device in hydraulically driven machines |
| DE9116370U1 (en) * | 1991-09-27 | 1992-12-03 | Pahnke Engineering GmbH & Co KG, 4000 Düsseldorf | Device for operating a press system |
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| DE2747548C2 (en) * | 1977-10-22 | 1986-04-17 | Thyssen Industrie Ag, 4300 Essen | Press with control circuit |
| DE2852303A1 (en) * | 1978-12-02 | 1980-06-04 | Schloemann Siemag Ag | FORGING PRESS, IN PARTICULAR FREE-FORMING FORGING PRESS, UNDERFLOOR |
| EP0112516B1 (en) * | 1982-12-01 | 1988-05-11 | Hitachi, Ltd. | Press apparatus for reducing slab width |
| 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 AT AT94109153T patent/ATE148840T1/en not_active IP Right Cessation
- 1994-06-15 KR KR1019940013519A patent/KR100326648B1/en not_active IP Right Cessation
- 1994-06-15 DE DE59401791T patent/DE59401791D1/en not_active Expired - Fee Related
- 1994-06-15 EP EP94109153A patent/EP0629455B1/en not_active Expired - Lifetime
- 1994-06-16 FI FI942867A patent/FI105896B/en active
- 1994-06-16 JP JP13458194A patent/JP3459297B2/en not_active Expired - Fee Related
- 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
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE559440A (en) * | 1956-07-23 | |||
| FR2243038A1 (en) * | 1973-09-10 | 1975-04-04 | Schirmer & Plate | |
| US4125010A (en) * | 1976-02-26 | 1978-11-14 | Smg-Suddeutsche Maschinenbau Gmbh | Hydraulic press |
| GB2016980A (en) * | 1978-01-31 | 1979-10-03 | B & G Hydraulics Ltd | Apparatus for operating hydraulic rams |
| US4206628A (en) * | 1979-03-16 | 1980-06-10 | The Continental Group, Inc. | Press with hydraulic load transferring mechanism |
| EP0116024A1 (en) * | 1983-02-03 | 1984-08-15 | Göran Palmers | An energy recovery device in hydraulically driven machines |
| DE9116370U1 (en) * | 1991-09-27 | 1992-12-03 | Pahnke Engineering GmbH & Co KG, 4000 Düsseldorf | Device for operating a press system |
Cited By (4)
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1057031C (en) | 2000-10-04 |
| CN1098343A (en) | 1995-02-08 |
| DE4320213A1 (en) | 1994-12-22 |
| KR100326648B1 (en) | 2002-06-20 |
| US5551276A (en) | 1996-09-03 |
| TW241212B (en) | 1995-02-21 |
| JPH07144205A (en) | 1995-06-06 |
| FI942867A0 (en) | 1994-06-16 |
| JP3459297B2 (en) | 2003-10-20 |
| DE59401791D1 (en) | 1997-03-27 |
| EP0629455B1 (en) | 1997-02-12 |
| ATE148840T1 (en) | 1997-02-15 |
| KR950000373A (en) | 1995-01-03 |
| FI942867A (en) | 1994-12-19 |
| FI105896B (en) | 2000-10-31 |
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