EP3028788A1 - Forging machine - Google Patents
Forging machine Download PDFInfo
- Publication number
- EP3028788A1 EP3028788A1 EP15195863.4A EP15195863A EP3028788A1 EP 3028788 A1 EP3028788 A1 EP 3028788A1 EP 15195863 A EP15195863 A EP 15195863A EP 3028788 A1 EP3028788 A1 EP 3028788A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic
- forging
- piston
- drive
- forging machine
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/08—Accessories for handling work or tools
- B21J13/10—Manipulators
- B21J13/12—Turning means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
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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
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/08—Accessories for handling work or tools
- B21J13/10—Manipulators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/20—Control devices specially adapted to forging presses not restricted to one of the preceding subgroups
Definitions
- the invention relates to a forging machine with at least one clamping head for a workpiece and with a controllable in dependence on the engagement of the forging tools rotary drive for a spindle of the clamping head.
- the workpiece which is held by a chuck and driven by means of a spindle, is held non-rotatably by the forging tools during the engagement of the forging tools.
- the axially displaceably mounted worm is axially supported on a spring accumulator. The rotary drive of the worm can thus be superimposed by a worm-rotating drive by the worm gear when the worm is axially displaced by the forging tools when holding the workpiece.
- the invention is therefore based on the object, a rotary drive for the spindle of a chuck of a forging machine in such a way that arise with respect to an intermittent spindle drive advantageous design conditions and the thereby considered mass forces can be kept relatively small.
- the invention achieves the stated object in that the rotary drive comprises at least one connected to a pump circuit, hydraulic motor for periodically supplying and discharging a predetermined amount of hydraulic fluid in dependence on the stroke frequency and / or Hublage the forging tools is connected to a parallel to the pump circuit connected hydraulic circuit.
- a hydraulic motor preferably a hydraulic radial piston motor, which develops high torques at low speeds, provides advantageous conditions for a simple, intermittent rotary drive the spindle of a chuck, because on the one hand the mass forces to be considered can be kept small and on the other hand, the possibility exists Pump circuit with a continuous flow of hydraulic fluid parallel to a separate hydraulic circuit through which the Hydraulic motor acted upon hydraulic fluid flow in response to the stroke frequency, but also from the stroke position of the forging tools can be changed by the hydraulic fluid flow of the pump circuit a predetermined amount of hydraulic fluid with the result is added and removed that the hydraulic motor in response to the supply and discharged hydraulic fluid quantity is periodically accelerated and braked, so that the spindle of the clamping head can be driven intermittently with a corresponding vote of the hydraulic fluid quantities supplied and discharged via the hydraulic circuit to the predetermined by the pump circuit hydraulic fluid flow rate.
- the hydraulic motor stops. During standstill can be advantageous to engage the blacksmith tools. However, if the hydraulic motor is stopped only after the tool engagement or accelerated again during the tool engagement torsional stresses are built up in the workpiece, which can be used if necessary to influence the crystalline structure of the workpiece.
- the hydraulic circuit comprises a piston-cylinder unit whose piston is driven back and forth via an actuator, wherein the pressure chambers are connected on both sides of the piston to the hydraulic motor, so that the piston travel in the pressure chambers on the one hand on and on the other side discharged hydraulic fluid quantity of the hydraulic circuit determined.
- the hydraulic fluid flow rate of the hydraulic motor can thus be controlled by the actuating drive for the piston of the piston-cylinder unit of the hydraulic circuit in the sense of the desired intermittent rotary drive of the spindle of the clamping head by a comparatively small servo valve.
- the actuating drive can comprise at least one actuating cylinder, which can be acted upon on both sides via a change-over valve. But it can also be provided for this purpose two actuating cylinders acted upon in opposite directions become.
- the hydraulic motor can be controlled in any arbitrary with respect to the dependent on the flow rate of the hydraulic fluid temporal course of the rotation angle, so that result in a dependent of the tool engagement control of the actuator advantageous adaptation options to different forging conditions.
- the actuator can also be coupled with a spring accumulator, so that there is a vibration system that can be stimulated by the actuator depending on the stroke frequency of the forging tools.
- the spring accumulator can be designed as a hydraulic spring accumulator, whose resonance behavior can be influenced by the decisive volume of the hydraulic medium.
- the forging machine can have two clamping heads with rotary drives in the form of hydraulic motors Whose separate from the pump circuits hydraulic circuits are controllable from each other depending, so that different torsional stresses can be built up within the workpiece and maintained during the forging process over different angles of rotation of the spindles of the clamping heads.
- the forging machine has according to the Fig. 1 in conventionally a frame 1 with four opposite each other in pairs with respect to a forging axis 2 forging tools 3, which are acted upon by adjusting drives radially to the forging axis 2 and equipped with forging hammers 4.
- the adjusting drives for the paired forging tools 3 can be actuated simultaneously or at a time interval, depending on the selected forging method for the tool pairs, so that the workpiece 5 is processed simultaneously or in sections by the blacksmith tools 3 distributed over its circumference.
- the workpiece 5 is detected by means of at least one clamping head 6 end and rotated about the forging axis 2.
- the clamping head 6 itself is mounted in a housing 7 which is movable by means of a carriage 8 along a guide 9.
- the chuck 6 mounted in the housing 7 is driven by a spindle 10.
- the rotary drive provided for this purpose comprises at least one hydraulic shock-resistant motor 11, which may preferably be designed as a hydraulic radial piston motor, but under certain circumstances as an axial piston motor.
- This hydraulic motor 11 is according to the Fig. 2 continuously supplied with a hydraulic fluid flow via a pump circuit 12.
- the hydraulic pump 13 of the pump circuit 12 is driven by a motor 14.
- the drive connection between the hydraulic motor 11 and the spindle 10 is carried out in a simple manner via a toothed gear, which comprises a seated on the spindle 10 gear 15 and meshing with the gear 15, driven by the hydraulic motor 11 pinion 16.
- a toothed gear which comprises a seated on the spindle 10 gear 15 and meshing with the gear 15, driven by the hydraulic motor 11 pinion 16.
- gear 15 and two can be removed, it is possible, the gear 15 and two to drive each connected to a hydraulic motor 11 pinion 16, which allows a hydraulic tension of the meshing with the gear 15 pinion 16 via the hydraulic motors 11, which are driven synchronously due to their series connection and allow a small size compared to a single drive.
- the hydraulic motor 11 is connected in parallel to the pump circuit 12 to a separate hydraulic circuit 17, via which predetermined amounts of hydraulic fluid can be supplied and removed, so that the continuous hydraulic fluid flow predetermined by the pump circuit increased or decreased by the hydraulic fluid flow of the hydraulic circuit 17 and consequently the hydraulic motor 11 is accelerated or braked accordingly.
- a piston-cylinder unit 18 is provided, the piston 19 can be driven back and forth via an actuator 20. Since the pressure chambers 21 are connected to the hydraulic motor 11 on the two piston sides, an adjustment of the piston 19 in a direction that displaces hydraulic fluid from one of the two pressure chambers 21 and is sucked in via the other pressure chamber 21 with the effect that the continuous hydraulic fluid flow the pump circuit 12, the amount of hydraulic fluid from the piston-cylinder unit 18 and is discharged. Corresponds to the supply and discharge hydraulic fluid amount of the hydraulic fluid rate of the pump circuit 12, the hydraulic motor 11 is periodically accelerated and braked to a standstill after a corresponding acceleration.
- the actuator 20 for the piston 19 is therefore to control periodically depending on the stroke frequency of the forging tools 3. In addition, the control can also be made dependent on the stroke position of the forging tools 3.
- the actuator 20 is after the Fig. 2 formed by two actuated in opposite directions actuator cylinder 22 which acts on a control valve 23 accordingly become. Via the control of the control valve 23, the adjusting movement of the piston 19 can thus be adapted to the respective requirements.
- the piston-cylinder unit 18 according to the Fig. 3 is different from the after Fig. 2 essentially only in that this piston-cylinder unit 18 is coupled to a hydraulic spring accumulator 24, so that the piston 19 can be operated energy-saving as part of a vibration system.
- the split piston 19 associated with displacement body 25 which engage in bores 26 of a penetrated by the piston rod 27 between the two part pistons 19 housing 28.
- These distributed around the piston rod 27 displacement body 25 are supported axially on pressure plates 29, which are each entrained in one direction by the partial piston 19. Since the holes 26 are connected via an annular space 30 with the hydraulic spring accumulator 24, the reciprocating piston adjustment causes an alternating loading of the hydraulic spring accumulator 24 by the two piston sides associated displacement body 25th
- FIG. 4 the time profile of the rotational angle ⁇ of the hydraulic motor 11 is shown.
- the characteristic curve 31 shows the time profile of the rotational angle ⁇ in the event that the hydraulic circuit 17 is switched off by a locking of the control valve 23 and therefore the hydraulic motor 11 is acted upon only by the continuous hydraulic fluid flow of the pump circuit 12.
- a sinusoidal course of the hydraulic fluid flow in the hydraulic circuit 17 results, which results in a sinusoidal profile of the rotational angle ⁇ according to the characteristic curve 32 of FIG Fig. 3 entails.
- the time profile of the rotation angle ⁇ thus depends on the size and the speed profile of the hydraulic fluid quantity supplied and discharged via the hydraulic circuit 17. This means that, in the case of a linear increase in the quantity of hydraulic fluid supplied and discharged, a rotational angle course which changes linearly between a maximum and a minimum value in accordance with the characteristic curve 34 of FIG Fig. 4 due to a sole admission of the hydraulic motor 11 via the hydraulic circuit 17 results.
- a superposition of the pump circuit 12 with a rotation angle curve corresponding to the characteristic curve 31 and thus controlled hydraulic circuit 17 thus requires a rotation angle curve according to the characteristic 35 with particularly pronounced downtime at the rotation angles ⁇ i and ⁇ i + 1 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
Es wird eine Schmiedemaschine mit wenigstens einem Spannkopf (6) für ein Werkstück (5) und mit einem in Abhängigkeit vom Eingriff der Schmiedewerkzeuge (3) steuerbaren Drehantrieb für den Spannkopf (6) beschrieben. Um vorteilhafte Antriebsbedingungen zu schaffen, wird vorgeschlagen, dass der Drehantrieb zumindest einen an einen Pumpenkreis (12) angeschlossenen, Hydraulikmotor (11) umfasst, der zum periodischen Zu- und Abführen einer vorgegebenen Menge an Hydraulikmittel in Abhängigkeit von der Hubfrequenz und/oder der Hublage der Schmiedewerkzeuge (3) an einen parallel zum Pumpenkreis (12) geschalteten Hydraulikkreis (17) angeschlossen ist. A forging machine with at least one clamping head (6) for a workpiece (5) and with a rotary drive for the clamping head (6) which can be controlled as a function of the engagement of the forging tools (3) is described. In order to provide advantageous drive conditions, it is proposed that the rotary drive comprises at least one hydraulic motor (11) connected to a pump circuit (12), which periodically supplies and discharges a predetermined amount of hydraulic fluid as a function of the stroke frequency and / or the stroke position the forging tools (3) is connected to a hydraulic circuit (17) connected in parallel with the pump circuit (12).
Description
Die Erfindung bezieht sich auf eine Schmiedemaschine mit wenigstens einem Spannkopf für ein Werkstück und mit einem in Abhängigkeit vom Eingriff der Schmiedewerkzeuge steuerbaren Drehantrieb für eine Spindel des Spannkopfs.The invention relates to a forging machine with at least one clamping head for a workpiece and with a controllable in dependence on the engagement of the forging tools rotary drive for a spindle of the clamping head.
Beim Rundschmieden wird das über einen Spannkopf gehaltene und mit Hilfe einer Spindel angetriebene Werkstück während des Eingriffs der Schmiedewerkzeuge durch die Schmiedewerkzeuge drehfest festgehalten. Zur Vermeidung von dadurch bedingten Torsionsbelastungen des Werkstücks ist es bekannt (
Es wurde darüber hinaus auch vorgeschlagen (
Der Erfindung liegt somit die Aufgabe zugrunde, einen Drehantrieb für die Spindel eines Spannkopfs einer Schmiedemaschine so auszugestalten, dass sich hinsichtlich eines intermittierenden Spindelantriebs vorteilhafte Konstruktionsbedingungen ergeben und die dabei zu berücksichtigenden Massenkräfte vergleichsweise klein gehalten werden können.The invention is therefore based on the object, a rotary drive for the spindle of a chuck of a forging machine in such a way that arise with respect to an intermittent spindle drive advantageous design conditions and the thereby considered mass forces can be kept relatively small.
Ausgehend von einer Schmiedemaschine der eingangs geschilderten Art löst die Erfindung die gestellte Aufgabe dadurch, dass der Drehantrieb zumindest einen an einen Pumpenkreis angeschlossenen, Hydraulikmotor umfasst, der zum periodischen Zu- und Abführen einer vorgegebenen Menge an Hydraulikmittel in Abhängigkeit von der Hubfrequenz und/oder der Hublage der Schmiedewerkzeuge an einen parallel zum Pumpenkreis geschalteten Hydraulikkreis angeschlossen ist.Starting from a forging machine of the type described above, the invention achieves the stated object in that the rotary drive comprises at least one connected to a pump circuit, hydraulic motor for periodically supplying and discharging a predetermined amount of hydraulic fluid in dependence on the stroke frequency and / or Hublage the forging tools is connected to a parallel to the pump circuit connected hydraulic circuit.
Der Einsatz eines Hydraulikmotors, vorzugsweise eines hydraulischen Radialkolbenmotors, der bei niedrigen Drehzahlen hohe Drehmomente entwickelt, stellt vorteilhafte Voraussetzungen für einen einfachen, intermittierenden Drehantrieb der Spindel eines Spannkopfs dar, weil einerseits die zu berücksichtigenden Massenkräfte klein gehalten werden können und anderseits die Möglichkeit besteht, zum Pumpenkreis mit einem kontinuierlichen Hydraulikmittelstrom einen gesonderten Hydraulikkreis parallelzuschalten, über den der den Hydraulikmotor beaufschlagende Hydraulikmittelstrom in Abhängigkeit von der Hubfrequenz, aber auch von der Hublage der Schmiedewerkzeuge periodisch geändert werden kann, indem dem Hydraulikmittelstrom des Pumpenkreises eine vorgegebene Menge an Hydraulikmittel mit dem Ergebnis zu- und abgeführt wird, dass der Hydraulikmotor in Abhängigkeit von der Zu- und abgeführten Hydraulikmittelmenge periodisch beschleunigt und gebremst wird, sodass bei einer entsprechenden Abstimmung der über den Hydraulikkreis zu- und abgeführten Hydraulikmittelmengen auf den durch den Pumpenkreis vorgegebenen Hydraulikmitteldurchsatz die Spindel des Spannkopfs intermittierend angetrieben werden kann. Entspricht die durch den Hydraulikkreis abgeführte Hydraulikmittelmenge der durch den Pumpenkreis zugeführten Menge an Hydraulikmittel, so steht der Hydraulikmotor. Während des Stillstands kann vorteilhaft der Eingriff der Schmiedewerkzeuge erfolgen. Wird jedoch der Hydraulikmotor erst nach dem Werkzeugeingriff stillgesetzt oder noch während des Werkzeugeingriffs wieder beschleunigt, so werden im Werkstück Torsionsspannungen aufgebaut, die im Bedarfsfall zur Einflussnahme auf die kristalline Struktur des Werkstücks genützt werden können.The use of a hydraulic motor, preferably a hydraulic radial piston motor, which develops high torques at low speeds, provides advantageous conditions for a simple, intermittent rotary drive the spindle of a chuck, because on the one hand the mass forces to be considered can be kept small and on the other hand, the possibility exists Pump circuit with a continuous flow of hydraulic fluid parallel to a separate hydraulic circuit through which the Hydraulic motor acted upon hydraulic fluid flow in response to the stroke frequency, but also from the stroke position of the forging tools can be changed by the hydraulic fluid flow of the pump circuit a predetermined amount of hydraulic fluid with the result is added and removed that the hydraulic motor in response to the supply and discharged hydraulic fluid quantity is periodically accelerated and braked, so that the spindle of the clamping head can be driven intermittently with a corresponding vote of the hydraulic fluid quantities supplied and discharged via the hydraulic circuit to the predetermined by the pump circuit hydraulic fluid flow rate. If the amount of hydraulic fluid discharged through the hydraulic circuit corresponds to the quantity of hydraulic fluid supplied by the pump circuit, then the hydraulic motor stops. During standstill can be advantageous to engage the blacksmith tools. However, if the hydraulic motor is stopped only after the tool engagement or accelerated again during the tool engagement torsional stresses are built up in the workpiece, which can be used if necessary to influence the crystalline structure of the workpiece.
Besonders einfache Konstruktionsverhältnisse ergeben sich, wenn der Hydraulikkreis eine Kolben-Zylindereinheit aufweist, deren Kolben über einen Stelltrieb hin- und hergehend antreibbar ist, wobei die Druckräume beidseits des Kolbens an den Hydraulikmotor angeschlossen sind, sodass der Kolbenweg in den Druckräumen die auf der einen Seite zu- und auf der anderen Seite abgeführte Hydraulikmittelmenge des Hydraulikkreises bestimmt. Der Hydraulikmitteldurchsatz des Hydraulikmotors kann somit über den Stelltrieb für den Kolben der Kolbenzylindereinheit des Hydraulikkreises im Sinne des gewünschten intermittierenden Drehantriebs der Spindel des Spannkopfs durch ein vergleichsweise kleines Servoventil gesteuert werden.Particularly simple construction conditions arise when the hydraulic circuit comprises a piston-cylinder unit whose piston is driven back and forth via an actuator, wherein the pressure chambers are connected on both sides of the piston to the hydraulic motor, so that the piston travel in the pressure chambers on the one hand on and on the other side discharged hydraulic fluid quantity of the hydraulic circuit determined. The hydraulic fluid flow rate of the hydraulic motor can thus be controlled by the actuating drive for the piston of the piston-cylinder unit of the hydraulic circuit in the sense of the desired intermittent rotary drive of the spindle of the clamping head by a comparatively small servo valve.
Um die hinsichtlich des Spindelantriebs zu berücksichtigenden Massenkräfte klein zu halten, kann der Stelltrieb wenigstens einen Stellzylinder umfassen, der über ein Umschaltventil beidseitig beaufschlagt werden kann. Es können hierfür aber auch zwei gegensinnig beaufschlagbare Stellzylinder vorgesehen werden. Über die Steuerung des Stelltriebs für den Kolben der Kolben-Zylindereinheit kann der Hydraulikmotor an sich beliebig hinsichtlich des vom Durchsatz des Hydraulikmittels abhängigen zeitlichen Verlaufs des Drehwinkels angesteuert werden, sodass sich bei einer vom Werkzeugeingriff abhängigen Steuerung des Stelltriebs vorteilhafte Anpassungsmöglichkeiten an unterschiedliche Schmiedebedingungen ergeben.In order to keep the mass forces to be considered with regard to the spindle drive small, the actuating drive can comprise at least one actuating cylinder, which can be acted upon on both sides via a change-over valve. But it can also be provided for this purpose two actuating cylinders acted upon in opposite directions become. About the control of the actuator for the piston of the piston-cylinder unit, the hydraulic motor can be controlled in any arbitrary with respect to the dependent on the flow rate of the hydraulic fluid temporal course of the rotation angle, so that result in a dependent of the tool engagement control of the actuator advantageous adaptation options to different forging conditions.
Selbstverständlich kann zur Energieeinsparung der Stelltrieb auch mit einem Federspeicher gekoppelt werden, sodass sich ein Schwingungssystem ergibt, das durch den Stelltrieb in Abhängigkeit von der Hubfrequenz der Schmiedewerkzeuge angeregt werden kann. Um unterschiedliche Resonanzfrequenzen in einfacher Weise berücksichtigen zu können, kann der Federspeicher als hydraulischer Federspeicher ausgebildet werden, auf dessen Resonanzverhalten über das maßgebende Volumen des Hydraulikmittels Einfluss genommen werden kann.Of course, to save energy, the actuator can also be coupled with a spring accumulator, so that there is a vibration system that can be stimulated by the actuator depending on the stroke frequency of the forging tools. In order to be able to take into account different resonant frequencies in a simple manner, the spring accumulator can be designed as a hydraulic spring accumulator, whose resonance behavior can be influenced by the decisive volume of the hydraulic medium.
Um während des Werkzeugeingriffs besondere Spannungen innerhalb des Werkstücks zur Einflussnahme auf die kristalline Struktur, auf den Flächenverlauf beim Schmieden von im Querschnitt rechteckigen oder quadratischen Werkstücken oder auf die Verwindung eines Werkstücks ausüben zu können, kann die Schmiedemaschine zwei Spannköpfe mit Drehantrieben in Form von Hydraulikmotoren aufweisen, deren von den Pumpenkreisen gesonderte Hydraulikkreise voneinander abhängig steuerbar sind, sodass über unterschiedliche Drehwinkel der Spindeln der Spannköpfe unterschiedliche Torsionsspannungen innerhalb des Werkstücks aufgebaut und auch während des Schmiedevorgangs aufrechterhalten werden können.In order to be able to exert special stresses within the workpiece during the tool engagement for influencing the crystalline structure, for the surface course when forging rectangular or square workpieces or for twisting a workpiece, the forging machine can have two clamping heads with rotary drives in the form of hydraulic motors Whose separate from the pump circuits hydraulic circuits are controllable from each other depending, so that different torsional stresses can be built up within the workpiece and maintained during the forging process over different angles of rotation of the spindles of the clamping heads.
In der Zeichnung ist der Erfindungsgegenstand beispielsweise dargestellt. Es zeigen
- Fig. 1
- eine erfindungsgemäße Schmiedemaschine in einer schematischen Seitenansicht,
- Fig. 2
- einen Drehantrieb für die Spindel eines Spannkopfs der Schmiedemaschine in einem vereinfachten Blockschaltbild,
- Fig. 3
- eine gegenüber der Ausführung nach
Fig. 2 geänderte Kolben-Zylindereinheit für den Hydraulikkreis in einem Blockschaltbild, - Fig. 4
- eine einen möglichen zeitlichen Verlauf des Drehwinkels des Radialkolbenmotors veranschaulichende Kennlinie und
- Fig. 5
- eine der
Fig. 3 entsprechende Darstellung einer Kennlinie für einen unterschiedlichen zeitlichen Drehwinkelverlauf.
- Fig. 1
- a forging machine according to the invention in a schematic side view,
- Fig. 2
- a rotary drive for the spindle of a clamping head of the forging machine in a simplified block diagram,
- Fig. 3
- one opposite to the execution
Fig. 2 modified piston-cylinder unit for the hydraulic circuit in a block diagram, - Fig. 4
- a characteristic of a possible time course of the rotation angle of the radial piston engine illustrative curve and
- Fig. 5
- one of the
Fig. 3 corresponding representation of a characteristic curve for a different temporal rotation angle course.
Die Schmiedemaschine weist gemäß der
Der im Gehäuse 7 gelagert Spannkopf 6 wird über eine Spindel 10 angetrieben. Der hierfür vorgesehene Drehantrieb umfasst wenigstens einen gegen Druckstöße unempfindlichen Hydraulikmotor 11, der vorzugsweise als hydraulischer Radialkolbenmotor, aber unter Umständen auch als Axialkolbenmotor ausgeführt sein kann. Dieser Hydraulikmotor 11 wird gemäß der
Um die Spindel 10 für den Spannkopf 6 entsprechend den Schmiedebedingungen intermittierend antreiben zu können, ist der Hydraulikmotor 11 parallel zum Pumpenkreis 12 an einen gesonderten Hydraulikkreis 17 angeschlossen, über den vorgegebene Hydraulikmittelmengen zu- und abgeführt werden können, sodass der durch den Pumpenkreis vorgegebene kontinuierliche Hydraulikmittelstrom durch den Hydraulikmittelstrom des Hydraulikkreises 17 vergrößert oder verringert und demzufolge der Hydraulikmotor 11 entsprechend beschleunigt oder gebremst wird.In order to be able to intermittently drive the
Entsprechend der
Der Stelltrieb 20 wird nach der
Die Kolben-Zylindereinheit 18 gemäß der
In der
Der zeitliche Verlauf des Drehwinkels ω hängt also von der Größe und vom Geschwindigkeitsverlauf der über den Hydraulikkreis 17 zu- und abgeführten Hydraulikmittelmenge ab. Dies bedeutet, dass sich bei einem linearen Anstieg der zu- und abgeführten Hydraulikmittelmenge ein linear zwischen einem Höchst- und einem Tiefstwert ändernder Drehwinkelverlauf gemäß der Kennlinie 34 der
Aufgrund der erfindungsgemäßen Steuerung des Drehantriebs für den Spannkopf 6 kann auch zusätzlich Einfluss auf die beim Schmieden entstehende Gefügestruktur genommen werden, wenn die Schmiedemaschine mit zwei erfindungsgemäßen Spannköpfen 6 ausgerüstet wird, wie dies in der
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50870/2014A AT516507B1 (en) | 2014-12-02 | 2014-12-02 | forging machine |
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EP3028788A1 true EP3028788A1 (en) | 2016-06-08 |
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ID=54770797
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EP15195863.4A Withdrawn EP3028788A1 (en) | 2014-12-02 | 2015-11-23 | Forging machine |
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US (1) | US9505050B2 (en) |
EP (1) | EP3028788A1 (en) |
AT (1) | AT516507B1 (en) |
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AT278481B (en) | 1968-08-01 | 1970-02-10 | Ges Fertigungstechnik & Maschb | Clamping head for forging machines |
AT290256B (en) * | 1969-07-28 | 1971-05-25 | Ges Fertigungstechnik & Maschb | Clamping head for forging machines |
DE3422810A1 (en) * | 1984-06-20 | 1986-01-02 | Maschinenfabrik Andritz Ag, Graz | Forging press |
EP0434891A2 (en) * | 1989-12-23 | 1991-07-03 | EUMUCO Aktiengesellschaft für Maschinenbau | Manipulator for forging machines, in particular multi-punch forging machines |
US5218855A (en) * | 1990-05-23 | 1993-06-15 | Eberhard Werner | Manipulator for forging machines, for example multiple-ram forging machines |
AT396883B (en) | 1992-08-13 | 1993-12-27 | Gfm Fertigungstechnik | CLAMPING HEAD FOR FORGING MACHINES |
EP1600228A1 (en) | 2004-05-26 | 2005-11-30 | GFM Beteiligungs- und Management GmbH & Co KG | Device for intermittently driving a spindle of a workpiece holder, in particular of a forging machine |
EP1631746A1 (en) * | 2003-06-12 | 2006-03-08 | Linz Center Of Mechatronics Gmbh | Hydraulic drive for displacing an actuator |
DE102012217650A1 (en) * | 2012-09-27 | 2014-03-27 | Dango & Dienenthal Maschinenbau Gmbh | Forging manipulator for handling workpiece, has pliers carrier that is connected to manipulator frame along translation axis through spring unit with switch device to defined release of energy stored in spring unit |
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CH440917A (en) * | 1964-09-01 | 1967-07-31 | Hydraulik Gmbh | Forging manipulation with longitudinal and rotary step controlled block holding tongs and process for its operation |
US3447349A (en) * | 1965-08-02 | 1969-06-03 | Paul Lippke | Method of and system for operating a high-speed forging press |
DE1627616C3 (en) * | 1967-04-22 | 1973-10-31 | Schloemann Ag, 4000 Duesseldorf | Control of the movements of a forging manipulator that works with a forging press |
DE1627621B2 (en) * | 1967-04-22 | 1972-02-10 | Schloemann AG, 4000 Düsseldorf | Control device for the step-by-step advancement of a tong carrier which is axially movably arranged on a manipulator carriage |
DE2533055C2 (en) * | 1975-07-24 | 1984-10-04 | SMS Hasenclever Maschinenfabrik GmbH, 4000 Düsseldorf | Forge manipulator with parallel spring-loaded tong carrier |
EP0257449B1 (en) * | 1986-08-21 | 1992-03-04 | SMS Hasenclever GmbH | Work piece gripping device on forging manipulators |
DE202004020404U1 (en) * | 2003-06-05 | 2005-05-25 | Langenstein & Schemann Gmbh | Handling device for handling a workpiece during a forming process |
AT501483B8 (en) * | 2004-05-26 | 2007-02-15 | Gfm Beteiligungs & Man Gmbh | DEVICE FOR FORGING A WORKPIECE |
DE102009052141A1 (en) * | 2009-04-23 | 2010-10-28 | Sms Meer Gmbh | Manipulator for forging machines |
-
2014
- 2014-12-02 AT ATA50870/2014A patent/AT516507B1/en not_active IP Right Cessation
-
2015
- 2015-11-23 EP EP15195863.4A patent/EP3028788A1/en not_active Withdrawn
- 2015-11-30 US US14/953,830 patent/US9505050B2/en not_active Expired - Fee Related
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AT278481B (en) | 1968-08-01 | 1970-02-10 | Ges Fertigungstechnik & Maschb | Clamping head for forging machines |
AT290256B (en) * | 1969-07-28 | 1971-05-25 | Ges Fertigungstechnik & Maschb | Clamping head for forging machines |
DE3422810A1 (en) * | 1984-06-20 | 1986-01-02 | Maschinenfabrik Andritz Ag, Graz | Forging press |
EP0434891A2 (en) * | 1989-12-23 | 1991-07-03 | EUMUCO Aktiengesellschaft für Maschinenbau | Manipulator for forging machines, in particular multi-punch forging machines |
US5218855A (en) * | 1990-05-23 | 1993-06-15 | Eberhard Werner | Manipulator for forging machines, for example multiple-ram forging machines |
AT396883B (en) | 1992-08-13 | 1993-12-27 | Gfm Fertigungstechnik | CLAMPING HEAD FOR FORGING MACHINES |
EP1631746A1 (en) * | 2003-06-12 | 2006-03-08 | Linz Center Of Mechatronics Gmbh | Hydraulic drive for displacing an actuator |
EP1600228A1 (en) | 2004-05-26 | 2005-11-30 | GFM Beteiligungs- und Management GmbH & Co KG | Device for intermittently driving a spindle of a workpiece holder, in particular of a forging machine |
DE102012217650A1 (en) * | 2012-09-27 | 2014-03-27 | Dango & Dienenthal Maschinenbau Gmbh | Forging manipulator for handling workpiece, has pliers carrier that is connected to manipulator frame along translation axis through spring unit with switch device to defined release of energy stored in spring unit |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109396314A (en) * | 2018-11-27 | 2019-03-01 | 黄连芝 | Forging equipment is used in a kind of production of hardware |
CN112974711A (en) * | 2021-05-07 | 2021-06-18 | 山东鲁工机械有限公司 | Forging loader |
CN112974711B (en) * | 2021-05-07 | 2021-07-30 | 山东鲁工机械有限公司 | Forging loader |
Also Published As
Publication number | Publication date |
---|---|
US20160151827A1 (en) | 2016-06-02 |
AT516507A4 (en) | 2016-06-15 |
US9505050B2 (en) | 2016-11-29 |
AT516507B1 (en) | 2016-06-15 |
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