EP0029223A2 - Hydraulic service system for a pulsating press - Google Patents

Hydraulic service system for a pulsating press Download PDF

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Publication number
EP0029223A2
EP0029223A2 EP80107012A EP80107012A EP0029223A2 EP 0029223 A2 EP0029223 A2 EP 0029223A2 EP 80107012 A EP80107012 A EP 80107012A EP 80107012 A EP80107012 A EP 80107012A EP 0029223 A2 EP0029223 A2 EP 0029223A2
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EP
European Patent Office
Prior art keywords
piston
control motor
pressure
oil
slide
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Granted
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EP80107012A
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German (de)
French (fr)
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EP0029223B1 (en
EP0029223A3 (en
Inventor
Zbigniew Prof.Dr. Ing. Mech Polanski
Ryszard Dipl. Ing. Mech. Moszumanski
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Politechnika Krakowska
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Politechnika Krakowska
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Publication of EP0029223A2 publication Critical patent/EP0029223A2/en
Publication of EP0029223A3 publication Critical patent/EP0029223A3/en
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Publication of EP0029223B1 publication Critical patent/EP0029223B1/en
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    • 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

Definitions

  • the invention relates to a hydraulic supply system for a pulsation press, in particular a press for non-cutting vibration shaping.
  • a hydraulic supply system for machines and pulsation devices which contains a pump with a safety valve which conveys the oil to the work spaces of the control motors of the pulsation plates via a slide distributor or another control element.
  • the pulsating pressure fluctuations in the work spaces of the control motors of the pulsation plates are brought about by means of a pulse valve, the opening of which caused by the pressure increase causes the oil to drain from the work spaces into the drain and a sudden pressure drop in the work spaces of the control motors.
  • a constant value of the pressure force is ensured by the use of a pressure collector, which is connected to the lower piston chamber of the control motors of the lower plate by means of a valve and a safety valve.
  • a pressure collector which is connected to the lower piston chamber of the control motors of the lower plate by means of a valve and a safety valve.
  • a hydraulic supply system of a double-acting hydraulic press which contains a two-stage impeller pump, which conveys the oil through a check valve and a safety valve to two electromagnetically controlled slide distributors, from where the oil is conveyed to the lower piston chamber of the hydraulic control motor and to a pressure multiplier .
  • a contact manometer is built on the line feeding the control motor, which controls the slide distributors when the target pressure is reached, which means that after reaching Chen the target pressure, the oil is placed in the over-piston chamber of the control engine and the lower-piston chamber is opened to the drain.
  • the piston of the control motor moves downward in accordance with the desired amplitude of the pulsation until the signal of the game repetition is supplied by a limit switch.
  • the control motor of the concentric plunger is supplied with the piston of the control motor and the piston arranged in the cavity by means of a separate hydraulic pump including equipment and control system.
  • a separate hydraulic pump including equipment and control system.
  • the pulsation liquid jet is generated in large rooms, which requires the use of pumps with a high delivery rate, makes it more difficult to stabilize the parameters of the vibration force and causes an unfavorable energy balance.
  • the invention has for its object to provide a hydraulic supply system of a pulsation press with easier stabilization of the parameters of the vibration force and high reliability and energy yield.
  • a hydraulic supply system of a pulsation press containing pumps, check valves, a throttle valve, safety valves, pressure collectors and slide distributors according to the invention in that two pumps, secured by check valves and connected to overflow valves and the pressure collectors, convey the oil to the slide distributors, a Slider distributor in its working position I conducts the oil to the working space under the piston of a hydraulic control motor and the oil is passed through the other slider distributor in its working position I to a rotary distributor and from there as a pulsating jet to the working space under part of the piston of the control motor with a smaller diameter and to the drain, and that the slide distributor in its working position II directs the oil to the space above the piston of the control motor, with the second working space at the same time through a slide valve the drain is connected, while the pressure value in the space above the piston is limited by means of an overflow valve.
  • the oil supply line from the one slide distributor to the rotary distributor is expediently connected to the line by a shut-off valve and the throttle valve, which feeds the oil from the other slide distributor into the working space under the piston of the hydraulic control motor.
  • the essence of the invention is that in the hydraulic supply system of a pulsation press, containing pumps, overflow check valves, safety valves, pressure collectors and slide distributors, two pumps are used, which are secured with check valves and connected to the overflow valves and pressure collectors, which the oil in the slide distributors promote.
  • One of the slide distributors in its position I directs the oil into the working space under the piston of the hydraulic control motor and through the second slide distributor in its working position I the oil is fed to the rotary distributor, from where it flows as a pulsating jet into the working space under the piston of the control motor with a smaller diameter and reaches the drain.
  • the first slide distributor directs the oil into the work space above the piston of the control motor, the work space below the piston with the smaller diameter being connected to the drain by means of a slide valve.
  • the pressure value in the space above the piston of the hydraulic control motor is limited by the overflow valve.
  • the Oil supply line from the slide distributor to the rotary distributor is connected to the oil supply line from the slide distributor to the space under the piston of the hydraulic control motor by means of a shut-off valve and a throttle valve.
  • the hydraulic supply system according to the invention makes it possible to carry out two schemes of the pulsation load using the generally accessible elements of the power hydraulics.
  • the system according to the invention enables a stepless regulation of the parameters of the process in a full range from values close to zero to nominal values.
  • the system according to the invention is characterized by reliability, simple operation and high energy yield.
  • the hydraulic supply system of a pulsation press contains an oil tank 1, from which two multi-piston pumps 4 and 5 with variable delivery capacity extract the oil via filters 2 and 3.
  • the pumps 4 and 5 are driven by DC motors 6 and 7 with infinitely variable speed control.
  • the change in the delivery capacity of the pumps 4 and 5 and the speed of the motors 6 and 7 driving these pumps enables the work to be changed Press speed in a wide range continuously.
  • the two pumps 4 and 5 are secured by check valves 8 and 9.
  • the pressure values in the branches of the system fed by the pumps 4 and 5 are limited by means of overflow valves 10 and 11 and displayed by means of pressure gauges 12 and 13.
  • the hydraulic control motor 16 is provided with a piston with two working surfaces.
  • slide distributors 17 and 18 are in their working position I, the oil is pumped into the working space V under the piston n of the hydraulic control motor 16.
  • a slide distributor 19 With simultaneous adjustment of a slide distributor 19 in its working position I, the oil is supplied to the rotary distributor 20 by the pump 5, from which it reaches the working space V under the part of the piston of the control motor with a smaller diameter and partly into the drain to the container 1.
  • the impeller of a rotary distributor 20 is driven by a DC motor 21 with continuously variable speed control.
  • shut-off valve 22 is closed in a line connecting the feed line of the space V under the piston of the hydraulic control motor 16 and the feed line of the rotary distributor 20, then the two branches of the supply system, fed by the pumps 4 and 5, work independently of one another and it becomes realizes the loading scheme, in which the amplitude of the force pulsation is constant with increasing average force value (amplitude-constant course).
  • the load scheme is realized, in which a simultaneous increase in the force pulsation amplitude occurs with increasing average force value (proportional curve).
  • the force relationships are determined by the throttle valve.
  • the return movement of the piston of the hydraulic control motor 16 takes place after the setting of the slide distributor 17 in the working position II and the setting of the working space V under the part of the piston of the control motor with a smaller diameter in the working position I.
  • the oil is then pumped from the 4 into the Space V p above the piston of the hydraulic control motor 16 and the space V under the piston of the control motor 16 and the space V under the part of the piston with a smaller diameter are connected to the drain to the container 1.
  • the pressure value in the space V p above the piston of the hydraulic control motor 16 is limited by an overflow valve 25 and displayed by a manometer 26.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

1. A hydraulic supply system for at least one differential-area (Vp , Vn ) piston of a hydraulic control motor (16) of a pulsation press, in which one pump, which is connected to a relief valve and the pressure line of which is controlled by a directional slide valve, is provided for each piston drive, a pulsator (20) being arranged which conveys oil as a pulsating stream into the same operating chamber (Vn ) of each piston of the hydraulic control motor (16) as the pump and a pressure accumulator additionally being connected for the return of each piston of the control motor (16) in the pressure chamber (Vp ), characterized in that the differential-area (Vp , Vn ) piston of the control motor (16) in addition comprises on one side two axially offset pressure chambers (Vn , Vw ) of differing sizes ; in that the pump (4) acts on the larger pressure chamber (Vn ) of the control motor (16), whereas a further pump (5) acts on the smaller pressure chamber (Vw ) of the sampe piston of the control motor (16) with the interposition of a pulsator constructed as a rotary distributor (20) ; in that the two pumps (4, 5) are each protected by means of a nonreturn valve (8, 9) and the pressure lines thereof are each connected to a pressure accumulator (14, 15) ; and in that the directional slide valve (17), in one of its operating positions, conveys the oil to a chamber (Vp ) on the other side of the piston of the control motor, the second operating chamber (Vw ) being simultaneously connected to the exhaust by a further slide valve (24), whilst the pressure value in the chamber (Vp ) on the other side of the piston above the piston is limited by means of a relief valve (25).

Description

Die Erfindung betrifft ein hydraulisches Versorgungssystem einer Pulsationspresse, insbesondere einer Presse zur spanlosen Vibrations-Formgebung.The invention relates to a hydraulic supply system for a pulsation press, in particular a press for non-cutting vibration shaping.

Es ist ein hydraulisches Versorgungssystem für Maschinen und Pulsationseinrichtungen bekannt, welches eine Pumpe mit einem Sicherheitsventil enthält, die das Öl über einen Schieberverteiler oder ein anderes Steuerelement zu den Arbeitsräumen der Steuermotoren der Pulsationsplatten fördert.A hydraulic supply system for machines and pulsation devices is known which contains a pump with a safety valve which conveys the oil to the work spaces of the control motors of the pulsation plates via a slide distributor or another control element.

Die pulsierenden Druckschwankungen in den Arbeitsräumen der Steuermotoren der Pulsationsplatten werden mittels eines Impulsventiles hervorgerufen, dessen durch die Druckzunahme hervorgerufenes Öffnen das Ablassen des Öls aus den Arbeitsräumen in den Abfluß und einen plötzlichen Druckabfall in den Arbeitsräumen der Steuermotoren bewirkt. Ein konstanter Wert der Druckkraft wird durch den Einsatz eines Drucksammlers sichergestellt, welcher mittels eines Ventiles und eines Sicherheitsventiles mit dem Unterkolbenraum der Steuermotoren der unteren Platte verbunden ist. Ein derartiges System ist aus der SU-PS 364378 bekannt.The pulsating pressure fluctuations in the work spaces of the control motors of the pulsation plates are brought about by means of a pulse valve, the opening of which caused by the pressure increase causes the oil to drain from the work spaces into the drain and a sudden pressure drop in the work spaces of the control motors. A constant value of the pressure force is ensured by the use of a pressure collector, which is connected to the lower piston chamber of the control motors of the lower plate by means of a valve and a safety valve. Such a system is known from SU-PS 364378.

Weiter ist ein hydraulisches Versorgungssystem einer doppelt wirkenden hydraulischen Presse bekannt, das eine zweistufige Flügelradpumpe enthält, welche das Öl durch ein Rückschlagventil und ein Sicherheitsventil zu zwei elektromagnetisch gesteuerten Schieberverteilern fördert, von wo das Öl zu dem Unterkolbenraum des hydraulischen Steuermotors und zu einem Druckmultiplikator gefördert wird. Auf der den Steuermotor speisenden Leitung ist ein Kontaktmanometer aufgebaut, das die Schieberverteiler beim Erreichen des Solldruckes aussteuert, wodurch nach dem Erreichen des Solldruckes das Öl in den überkolbenraum des Steuermotors gegeben wird und der Unterkolbenraum zum Abfluß geöffent wird. Im Ergebnis verlagert sich der Kolben des Steuermotors solange in Übereinstimmung mit der Sollamplitude der Pulsation abwärts, bis durch einen Endschalter das Signal der Spielwiederholung zugeführt wird. Die Versorgung des Steuermotors des konzentrischen Stempels mit dem Kolben des Steuermotors und des in der Aushöhlung angeordneten Kolbens erfolgt mittels einer gesonderten hydraulischen Pumpe samt Ausrüstung und Steuersystem. Ein derartiges System ist aus der SU-PS 183709 bekannt.Furthermore, a hydraulic supply system of a double-acting hydraulic press is known, which contains a two-stage impeller pump, which conveys the oil through a check valve and a safety valve to two electromagnetically controlled slide distributors, from where the oil is conveyed to the lower piston chamber of the hydraulic control motor and to a pressure multiplier . A contact manometer is built on the line feeding the control motor, which controls the slide distributors when the target pressure is reached, which means that after reaching Chen the target pressure, the oil is placed in the over-piston chamber of the control engine and the lower-piston chamber is opened to the drain. As a result, the piston of the control motor moves downward in accordance with the desired amplitude of the pulsation until the signal of the game repetition is supplied by a limit switch. The control motor of the concentric plunger is supplied with the piston of the control motor and the piston arranged in the cavity by means of a separate hydraulic pump including equipment and control system. Such a system is known from SU-PS 183709.

In den bekannten hydraulischen Versorgungssystemen von Pulsationspressen erfolgt die Erzeugung des Pulsationsflüssigkeitsstrahles in großen Räumen, was den Einsatz von Pumpen mit großer Förderleistung erfordert, die Stabilisation der Parameter der Vibrationskraft erschwert und eine ungünstige Energiebilanz bewirkt.In the known hydraulic supply systems of pulsation presses, the pulsation liquid jet is generated in large rooms, which requires the use of pumps with a high delivery rate, makes it more difficult to stabilize the parameters of the vibration force and causes an unfavorable energy balance.

Der Erfindung liegt die Aufgabe zugrunde, ein hydraulisches Versorgungssystem einer Pulsationspresse mit erleichterter Stabilisation der Parameter der Vibrationskraft und hoher Zuverlässigkeit und Energieausbeute zu schaffen.The invention has for its object to provide a hydraulic supply system of a pulsation press with easier stabilization of the parameters of the vibration force and high reliability and energy yield.

Diese Aufgabe wird mit einem hydraulischen Versorgungssystem einer Pulsationspresse, enthaltend Pumpen, Rückschlagventile, ein Drosselventil, Sicherheitsventile, Drucksammler und Schieberverteiler erfindungsgemäß dadurch gelöst, daß zwei Pumpen, gesichert durch Rückschlagventile und verbunden mit Überlaufventilen und den Drucksammlern das Öl zu den Schieberverteilern fördern, wobei ein Schieberverteiler in seiner Arbeitslage I das Öl zum Arbeitsraum unter dem Kolben eines hydraulischen Steuermotors leitet und durch den anderen Schieberverteiler in seiner Arbeitslage I das Öl zu einem Rotationsverteiler geleitet wird und von dort als pulsierender Strahl zum Arbeitsraum unter einem Teil des Kolbens des Steuermotors mit kleinerem Durchmesser und zum Abfluß, und daß der Schieberverteiler in seiner Arbeitslage II das Öl zum Raum über dem Kolben des Steuermotors leitet, wobei gleichzeitig der zweite Arbeitsraum durch ein Schieberventil mit dem Abfluß verbunden wird, während der Druckwert in dem Raum über dem Kolben mittels eines Überlaufventiles begrenzt wird.This object is achieved with a hydraulic supply system of a pulsation press, containing pumps, check valves, a throttle valve, safety valves, pressure collectors and slide distributors according to the invention in that two pumps, secured by check valves and connected to overflow valves and the pressure collectors, convey the oil to the slide distributors, a Slider distributor in its working position I conducts the oil to the working space under the piston of a hydraulic control motor and the oil is passed through the other slider distributor in its working position I to a rotary distributor and from there as a pulsating jet to the working space under part of the piston of the control motor with a smaller diameter and to the drain, and that the slide distributor in its working position II directs the oil to the space above the piston of the control motor, with the second working space at the same time through a slide valve the drain is connected, while the pressure value in the space above the piston is limited by means of an overflow valve.

Zweckmäßig ist die Ölzuführleitung von dem einen Schieberverteiler zum Rotationsverteiler durch ein Absperrventil und das Drosselventil mit der Leitung verbunden, welche das Öl vom anderen Schieberverteiler in den Arbeitsraum unter dem Kolben des hydraulischen Steuermotors zuführt.The oil supply line from the one slide distributor to the rotary distributor is expediently connected to the line by a shut-off valve and the throttle valve, which feeds the oil from the other slide distributor into the working space under the piston of the hydraulic control motor.

Das Wesen der Erfindung besteht darin, daß in dem hydraulischen Versorgungssystem einer Pulsationspresse, enthaltend Pumpen, Überlaufrückschlagventile, Sicherheitsventile, Drucksammler und Schieberverteiler, zwei Pumpen eingesetzt werden, die mit Rückschlagventilen gesichert und mit den Überlaufventilen und Drucksammlern verbunden sind, welche das Öl in die Schieberverteiler fördern. Einer der Schieberverteiler leitet in seiner Lage I das Öl in den Arbeitsraum unter dem Kolben des hydraulischen Steuermotors und durch den zweiten Schieberverteiler wird in seiner Arbeitslage I das Öl dem Rotationsverteiler zugeführt, von wo es als ein pulsierender Strahl in den Arbeitsraum unter dem Kolben des Steuermotors mit kleinerem Durchmesser und zum Abfluß gelangt. Der erste Schieberverteiler leitet in seiner Arbeitslage II das Öl in den Arbeitsraum über dem Kolben des Steuermotors, wobei gleichzeitig der Arbeitsraum unter dem Kolben mit kleinerem Durchmesser mittels eines Schieberventiles mit dem Abfluß verbunden wird. Der Druckwert in dem Raum über dem Kolben des hydraulischen Steuermotors wird durch das Überlaufventil begrenzt. Die ölzuführleitung von dem Schieberverteiler zu dem Rotationsverteiler ist mittels eines Absperrventiles und eines Drosselventiles mit der Ölzuführleitung von dem Schieberverteiler zu dem Raum unter dem Kolben des hydraulischen Steuermotors verbunden.The essence of the invention is that in the hydraulic supply system of a pulsation press, containing pumps, overflow check valves, safety valves, pressure collectors and slide distributors, two pumps are used, which are secured with check valves and connected to the overflow valves and pressure collectors, which the oil in the slide distributors promote. One of the slide distributors in its position I directs the oil into the working space under the piston of the hydraulic control motor and through the second slide distributor in its working position I the oil is fed to the rotary distributor, from where it flows as a pulsating jet into the working space under the piston of the control motor with a smaller diameter and reaches the drain. In its working position II, the first slide distributor directs the oil into the work space above the piston of the control motor, the work space below the piston with the smaller diameter being connected to the drain by means of a slide valve. The pressure value in the space above the piston of the hydraulic control motor is limited by the overflow valve. The Oil supply line from the slide distributor to the rotary distributor is connected to the oil supply line from the slide distributor to the space under the piston of the hydraulic control motor by means of a shut-off valve and a throttle valve.

Das erfindungsgemäße hydraulische Versorgungssystem ermöglicht die Durchführung zweier Schemen der Pulsationsbelastung bei Ausnutzung der allgemein zugänglichen Elemente der Krafthydraulik. Das erfindungsgemäße System ermöglicht eine stufenlose Regelung der Parameter des Prozesses in einem vollen Bereich von Werten nahe Null bis zu Nennwerten. Das erfindungsgemäße System zeichnet sich durch Zuverlässigkeit, einfache Bedienung und hohe Energieausbeute aus.The hydraulic supply system according to the invention makes it possible to carry out two schemes of the pulsation load using the generally accessible elements of the power hydraulics. The system according to the invention enables a stepless regulation of the parameters of the process in a full range from values close to zero to nominal values. The system according to the invention is characterized by reliability, simple operation and high energy yield.

Im folgenden ist das erfindungsgemäße hydraulische Versorgungssystem einer Pulsationspresse anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

  • Fig. 1 ein Schemabild des Versorgungssystems,
  • Fig. 2 eine Darstellung der Pulsationsbelastung bei geschlossenem Absperrventil, und
  • Fig. 3 eine Darstellung der Pulsationsbelastung bei geöffnetem Absperrventil.
The hydraulic supply system of a pulsation press according to the invention is explained in more detail below on the basis of an exemplary embodiment shown in the drawing. Show it:
  • 1 is a schematic of the supply system,
  • 2 shows the pulsation load when the shut-off valve is closed, and
  • Fig. 3 shows the pulsation load when the shut-off valve is open.

Das hydraulische Versorgungssystem einer Pulsationspresse enthält einen Ölbehälter 1, von welchem über Filter 2 und 3 zwei Mehrkolbenpumpen 4 und 5 mit veränderlicher Förderleistung das Öl entnehmen. Die Pumpen 4 und 5 werden durch Gleichstrommotoren 6 und 7 mit stufenloser Regelung der Drehzahl angetrieben. Die Änderung der Förderleistung der Pumpen 4 und 5 und der Drehzahl der diese Pumpen antreibenden Motoren 6 und 7 ermöglicht die Änderung der Arbeitsgeschwindigkeit der Presse in kontinuierlicher Weise in einem weiten Bereich. Die beiden Pumpen 4 und 5 werden durch Rückschlagventile 8 und 9 gesichert. Die Druckwerte in den durch die Pumpen 4 und 5 gespeisten Zweigen des Systems werden mittels Überlaufventilen 10 und 11 begrenzt und mittels Manometern 12 und 13 angezeigt. Mit den Druckleitungen der Pumpen 4 und 5 sind Drucksammler 14 und 15 verbunden, deren Aufgabe in der Stabilisierung des Drukkes und in der Lieferung größerer Ölmengen bei plötzlichem Bedarf in den Arbeitsräumen eines Steuermotors 16 besteht. Der hydraulische Steuermotor 16 ist mit einem Kolben mit zwei Arbeitsflächen versehen. Wenn sich Schieberverteiler 17 und 18 in ihrer Arbeitslage I befinden, dann wird das Öl in den Arbeitsraum V unter dem Kolben n des hydraulischen Steuermotors 16 gefördert. Bei gleichzeitiger Einstellung eines Schieberverteilers 19 in seine Arbeitslage I wird das Öl durch die Pumpe 5 dem Rotationsverteiler 20 zugeführt, wovon es in den Arbeitsraum V unter dem Teil des Kolbens des Steuermotors mit kleinerem Durchmesser und teilweise in den Abfluß zum Behälter 1 gelangt. Das Flügelrad eines Rotationsverteilers 20 wird durch einen Gleichstrommotor 21 mit stufenloser Regelung der Drehzahl angetrieben. Wenn ein Absperrventil 22 in einer die Speiseleitung des Raumes V unter dem Kolben des hydraulischen Steuermotors 16 und die Speiseleitung des Rotationsverteilers 20 verbindenden Leitung geschlossen ist, dann arbeiten die beiden Zweige des Versorgungssystems, gespeist durch die Pumpen 4 und 5, voneinander unabhängig und es wird das Belastungsschema realisiert, bei welchem die Amplitude der Kraftpulsation bei steigendem durchschnittlichen Kraftwert konstant ist (amplitudenkonstanter Verlauf).The hydraulic supply system of a pulsation press contains an oil tank 1, from which two multi-piston pumps 4 and 5 with variable delivery capacity extract the oil via filters 2 and 3. The pumps 4 and 5 are driven by DC motors 6 and 7 with infinitely variable speed control. The change in the delivery capacity of the pumps 4 and 5 and the speed of the motors 6 and 7 driving these pumps enables the work to be changed Press speed in a wide range continuously. The two pumps 4 and 5 are secured by check valves 8 and 9. The pressure values in the branches of the system fed by the pumps 4 and 5 are limited by means of overflow valves 10 and 11 and displayed by means of pressure gauges 12 and 13. With the pressure lines of the pumps 4 and 5, pressure collectors 14 and 15 are connected, the task of which is to stabilize the pressure and to supply larger quantities of oil in the event of a sudden need in the work spaces of a control motor 16. The hydraulic control motor 16 is provided with a piston with two working surfaces. When slide distributors 17 and 18 are in their working position I, the oil is pumped into the working space V under the piston n of the hydraulic control motor 16. With simultaneous adjustment of a slide distributor 19 in its working position I, the oil is supplied to the rotary distributor 20 by the pump 5, from which it reaches the working space V under the part of the piston of the control motor with a smaller diameter and partly into the drain to the container 1. The impeller of a rotary distributor 20 is driven by a DC motor 21 with continuously variable speed control. If a shut-off valve 22 is closed in a line connecting the feed line of the space V under the piston of the hydraulic control motor 16 and the feed line of the rotary distributor 20, then the two branches of the supply system, fed by the pumps 4 and 5, work independently of one another and it becomes realizes the loading scheme, in which the amplitude of the force pulsation is constant with increasing average force value (amplitude-constant course).

Beim Öffnen das Absperrventils 22, d.h. nach der Verbindung der den Raum V des Steuermotors 16 speisenden Leitung mit der den Rotationsverteiler 20 speisenden Leitung mittels eines Drosselventiles 23 wird das Belastungsschema realisiert, bei welchem mit steigendem durchschnittlichen Kraftwert eine gleichzeitige Steigerung der Kraftpulsationsamplitude auftritt (proportionaler Verlauf). Die Kraftverhältnisse werden durch das Drosselventil festgestellt. Die Rückbewegung des Kolbens des hydraulischen Steuermotors 16 erfolgt nach der Einstellung des Schieberverteilers 17 in die Arbeitslage II und der Einstellung des Arbeitsraums V unter dem Teil des Kolbens des Steuermotors mit kleinerem Durchmesser in die Arbeitslage I. Das Öl wird dann von der Pumpe 4 in den Raum Vp über dem Kolben des hydraulischen Steuermotors 16 gefördert und der Raum V unter dem Kolben des Steuermotors 16 und der Raum V unter dem Teil des Kolbens mit kleinerem Durchmesser werden mit dem Abfluß zu dem Behälter 1 verbunden. Der Druckwert in dem Raum Vp über dem Kolben des hydraulischen Steuermotors 16 wird mittels eines Überlaufventils 25 begrenzt und durch ein Manometer 26 angezeigt.When opening the shut-off valve 22, ie after the connection of the Lei feeding the space V of the control motor 16 tion with the line supplying the rotary distributor 20 by means of a throttle valve 23, the load scheme is realized, in which a simultaneous increase in the force pulsation amplitude occurs with increasing average force value (proportional curve). The force relationships are determined by the throttle valve. The return movement of the piston of the hydraulic control motor 16 takes place after the setting of the slide distributor 17 in the working position II and the setting of the working space V under the part of the piston of the control motor with a smaller diameter in the working position I. The oil is then pumped from the 4 into the Space V p above the piston of the hydraulic control motor 16 and the space V under the piston of the control motor 16 and the space V under the part of the piston with a smaller diameter are connected to the drain to the container 1. The pressure value in the space V p above the piston of the hydraulic control motor 16 is limited by an overflow valve 25 and displayed by a manometer 26.

Claims (2)

1. Hydraulisches Versorgungssystem einer Pulsationspresse, enthaltend Pumpen (4, 5), Rückschlagventile (8, 9), ein Drosselventil (23), Sicherheitsventile, Drucksammler (14, 15) und Schieberverteiler (17, 19), dadurch gekennzeichnet , daß zwei Pumpen (4, 5) gesichert durch Rückschlagventile (8, 9) und verbunden mit Überlaufventilen (10, 11) und den Drucksammlern (14, 15) das Öl zu den Schieberverteilern (17, 19) fördern, wobei ein Schieberverteiler (17) in seiner Arbeitslage I das Öl zum Arbeitsraum (V ) unter dem Kolben eines hydraulischen Steuermotors (16) leitet und durch den anderen Schieberverteiler (19) in seiner Arbeitslage I das Öl zu einem Rotationsverteiler (20) geleitet wird und von dort als pulsierender Strahl zum Arbeitsraum (V ) unter einem Teil des Kolbens des Steuermotors (16) mit kleinerem Durchmesser und zum Abfluß, und daß der Schieberverteiler (17) in seiner Arbeitslage II das Öl zum Raum (V ) über dem Kolben des Steuermotors leitet, wobei gleichzeitig der zweite Arbeitsraum (V ) durch ein Schieberventil (24) mit dem Abfluß verbunden wird, während der Druckwert in dem Raum (V ) über dem Kolben mittels eines Überlaufventiles (25) begrenzt wird.1. Hydraulic supply system of a pulsation press, containing pumps (4, 5), check valves (8, 9), a throttle valve (23), safety valves, pressure collectors (14, 15) and slide distributors (17, 19), characterized in that two pumps (4, 5) secured by check valves (8, 9) and connected to overflow valves (10, 11) and the pressure collectors (14, 15) convey the oil to the slide manifolds (17, 19), with a slide manifold (17) in it Working position I directs the oil to the working area (V) under the piston of a hydraulic control motor (16) and in the working position I the oil is passed through the other slide distributor (19) to a rotary distributor (20) and from there as a pulsating jet to the working area ( V) under a part of the piston of the control motor (16) with a smaller diameter and for drainage, and that the slide distributor (17) in its working position II directs the oil to the space (V) above the piston of the control motor, at the same time the second arm eitsraum (V) is connected to the drain by a slide valve (24), while the pressure value in the space (V) above the piston is limited by means of an overflow valve (25). 2. Versorgungssystem nach Anspruch 1, dadurch gekennzeichnet , daß die Ölzuführleitung von dem einen Schieberverteiler (19) zum Rotationsverteiler (20) durch ein Absperrventil (22) und das Drosselventil (23) mit der Leitung verbunden ist, welche das Öl vom anderen Schieberverteiler (17) in den Arbeitsraum (V ) unter dem Kolben des hydraulischen Steuermotors (16) zuführt.2. Supply system according to claim 1, characterized in that the oil supply line from the one slide distributor (19) to the rotary distributor (20) by a shut-off valve (22) and the throttle valve (23) is connected to the line which the oil from the other slide distributor ( 17) into the working space (V) under the piston of the hydraulic control motor (16).
EP19800107012 1979-11-15 1980-11-13 Hydraulic service system for a pulsating press Expired EP0029223B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL219672 1979-11-15
PL21967279A PL126538B1 (en) 1979-11-15 1979-11-15 Pulsatory press hydraulic supply system

Publications (3)

Publication Number Publication Date
EP0029223A2 true EP0029223A2 (en) 1981-05-27
EP0029223A3 EP0029223A3 (en) 1981-10-28
EP0029223B1 EP0029223B1 (en) 1983-11-23

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ID=19999458

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Application Number Title Priority Date Filing Date
EP19800107012 Expired EP0029223B1 (en) 1979-11-15 1980-11-13 Hydraulic service system for a pulsating press

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EP (1) EP0029223B1 (en)
BG (1) BG41652A3 (en)
DD (1) DD154345A5 (en)
DE (1) DE3065716D1 (en)
HU (1) HU182236B (en)
PL (1) PL126538B1 (en)
RO (1) RO81558B (en)
SU (1) SU1050583A3 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521460A1 (en) * 1982-02-18 1983-08-19 Refflinghaus Gmbh Co Kg Max WIRE BENDING MACHINE
EP0103727A1 (en) * 1982-09-02 1984-03-28 Inventio Ag Synchronization control apparatus for the electro-hydraulic drive of a press brake
DE3419689A1 (en) * 1984-05-25 1985-11-28 Mannesmann Rexroth GmbH, 8770 Lohr Device for supplying pressure medium to a machine, in particular a hydraulic cylinder
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
CN104353770A (en) * 2014-10-23 2015-02-18 湖南明诚机械制造有限公司 High frequency hammer pile hydraulic system of hydraulic hammer pile machine and hammering cartridge valve of hydraulic hammer pile machine
CN106996071A (en) * 2017-03-20 2017-08-01 温州大学 A kind of gas-liquid mixed excitation system of cement pavement rubblizing apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2335412A1 (en) * 1973-07-12 1975-02-06 Exnii Kusnetschno Pressowowo M Hydraulic press with pulsating drive - high pressure feed line and outlet line connected to pulsator
DE2345527A1 (en) * 1973-09-10 1975-03-20 Schirmer & Plate HORIZONTAL HIGH SPEED FORGING PRESS

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2335412A1 (en) * 1973-07-12 1975-02-06 Exnii Kusnetschno Pressowowo M Hydraulic press with pulsating drive - high pressure feed line and outlet line connected to pulsator
DE2345527A1 (en) * 1973-09-10 1975-03-20 Schirmer & Plate HORIZONTAL HIGH SPEED FORGING PRESS

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521460A1 (en) * 1982-02-18 1983-08-19 Refflinghaus Gmbh Co Kg Max WIRE BENDING MACHINE
US4502307A (en) * 1982-02-18 1985-03-05 Rudolf Grunewald Wire bending machine
EP0103727A1 (en) * 1982-09-02 1984-03-28 Inventio Ag Synchronization control apparatus for the electro-hydraulic drive of a press brake
DE3419689A1 (en) * 1984-05-25 1985-11-28 Mannesmann Rexroth GmbH, 8770 Lohr Device for supplying pressure medium to a machine, in particular a hydraulic cylinder
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
CN104353770A (en) * 2014-10-23 2015-02-18 湖南明诚机械制造有限公司 High frequency hammer pile hydraulic system of hydraulic hammer pile machine and hammering cartridge valve of hydraulic hammer pile machine
CN104353770B (en) * 2014-10-23 2016-03-23 湖南明诚机械制造有限公司 Hydraulic hammer stake machine high frequency is hammered stake hydraulic system into shape and is beaten hammer inserted valve
CN106996071A (en) * 2017-03-20 2017-08-01 温州大学 A kind of gas-liquid mixed excitation system of cement pavement rubblizing apparatus
CN106996071B (en) * 2017-03-20 2019-06-11 温州大学 A kind of gas-liquid mixed excitation system of cement pavement rubblizing apparatus

Also Published As

Publication number Publication date
DE3065716D1 (en) 1983-12-29
BG41652A3 (en) 1987-07-15
PL219672A1 (en) 1981-06-19
RO81558A (en) 1983-04-29
DD154345A5 (en) 1982-03-17
SU1050583A3 (en) 1983-10-23
HU182236B (en) 1983-12-28
EP0029223B1 (en) 1983-11-23
PL126538B1 (en) 1983-08-31
RO81558B (en) 1983-04-30
EP0029223A3 (en) 1981-10-28

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