EP2844456B1 - Powder press - Google Patents

Powder press Download PDF

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Publication number
EP2844456B1
EP2844456B1 EP13719715.8A EP13719715A EP2844456B1 EP 2844456 B1 EP2844456 B1 EP 2844456B1 EP 13719715 A EP13719715 A EP 13719715A EP 2844456 B1 EP2844456 B1 EP 2844456B1
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EP
European Patent Office
Prior art keywords
press according
drive
screw drive
die
holder
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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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Application number
EP13719715.8A
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German (de)
French (fr)
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EP2844456A1 (en
Inventor
Nicolas HEMMER
Johannes FLESCH
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komage Gellner Maschinenfabrik KG
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Komage Gellner Maschinenfabrik KG
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Publication of EP2844456A1 publication Critical patent/EP2844456A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
    • B30B1/28—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks the cam, crank, or eccentric being disposed below the lower platen or table and operating to pull down the upper platen or slide
    • 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
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/14—Control arrangements for mechanically-driven presses

Definitions

  • the invention relates to a press for producing compacts from powder material which is pressed by counteracting punches in a die, with a seat for a lower punch which is fixedly supported on a supporting frame structure, with a seat for an upper punch which can be moved by crank-driven drawbars and with a drive device for the die.
  • Such a powder press is out DE 41 14 880 A1 known.
  • the upper punch of this known powder press is moved by vertical tie rods, which are linked to eccentrics via connecting rods.
  • the eccentrics are located on a main shaft, which is located in a base part of the powder press and is driven by a worm gear.
  • the vertical position of the upper punch and the angle of rotation of the main shaft are in a sine or cosine relationship.
  • the powder press works according to the so-called extraction method, ie to release the compact produced, the die is moved down after the pressing process so that the lower punch pushes the compact out of the die.
  • a hydraulic drive is used to move the die.
  • Out of JP H05 57498 A is a powder press with a crank-driven upper punch and an electromechanical drive for the die.
  • JP H01 104500 A discloses a powder press according to the preamble of claim 1 with an upper and a lower ram, wherein both the upper and the lower ram can each be driven by an electric motor.
  • the invention is based on the object of creating a new powder press of the type mentioned at the outset, which enables more precise control of the movement of the die.
  • a powder press with the features of claim 1 solves this problem.
  • an upper punch which is moved by crank-driven drawbars
  • a die which is moved electromechanically by an electric motor and a screw drive coaxial thereto, are combined with one another.
  • the electromechanical drive allows a movement of the die that is precisely matched to the movement of the upper punch.
  • the electromechanical drive preferably has at least one torque motor, which generates a torque that is constant over almost the entire speed range.
  • the rotor of the electric motor is expediently in direct drive connection with the screw drive, in particular the threaded rod of the screw drive, possibly via a slipping clutch that spins under high loads.
  • the rotor of the electric motor can be a hollow shaft within which, in a further advantageous embodiment of the invention, the screw drive can be arranged at least partially in a space-saving manner.
  • the threaded rod of a screw drive is mounted axially and radially on a support frame of the powder press.
  • this bearing keeps loads to be transmitted through the threaded rod away from the electric motor in both axial directions.
  • the bearing mentioned can, for example, be an axial spherical roller bearing.
  • the screw drive itself preferably comprises a roller, ball or planetary roller screw drive.
  • the electromechanical drive has an anti-rotation device that prevents torque from being introduced into the die.
  • the screw drive thus converts the rotary movement of the electric motor into a purely linear movement of the die.
  • a measuring system for directly measuring the position of the matrix.
  • a rotary encoder preferably records the speed of the electric motor.
  • the rotary encoder is preferably arranged coaxially to the electric motor.
  • cooling in particular water cooling, is provided for the die drive, which prevents the electric motor from heating up, in particular at high operating clock frequencies, and thus enables higher performance in continuous operation.
  • a braking device can advantageously be provided, which counteracts undesired rotations of the screw drive when the electric motor is in a de-energized state.
  • a controller which adjusts the position of the die depending on the angular position of the crank drive of the tie rods or directly on the position of the upper punch using a predetermined, preferably freely programmable relationship between the relevant positions.
  • the above-mentioned measuring system for direct measurement of the position of the die and the rotary encoder that records the speed of the electric motor are part of this control system, along with a rotary encoder that records the angular position of the crank mechanism.
  • the powder press shown has a support frame that can be erected on a support base 1 .
  • Vertical support columns 3 extend from a main base 2 of the support frame, which is cuboid in outline.
  • a main shaft 5 with eccentrics at its ends is accommodated in the main base 2 near the base floor.
  • a connecting rod 6 is articulated on each of the eccentrics.
  • the connecting rods 6 are articulated with tie rods 7 extending vertically along the vertical support columns 3.
  • a rotary encoder (not shown) detects the angular position of this crank mechanism.
  • the main shaft 5 can be rotated around its horizontal axis with the help of a high-performance worm gear 8 .
  • the high-performance worm gear 8 is drivingly connected to a drive motor, not shown.
  • the tie rods 7 are connected via a rod head 10 to a receptacle 11, which can be moved vertically by the tie rods 7, for an in 2 upper punch 12 shown.
  • a receptacle 11 By means of an adjustment device 13, the position of the upper punch 12 relative to the rod head 10 can be changed.
  • a device shown at 14 generates an additional movement in the pressing direction, the force of which is freely programmable.
  • a receptacle 16 for a die 17 is arranged between the receptacle 11 for the upper punch 12 and a receptacle 9 for a lower punch 15, a receptacle 16 for a die 17 is arranged.
  • the lower punch 15 and die 17 are like the upper punch 12 in 2 shown.
  • the seat 9 for the lower punch 15 is fixed and supported by the support columns 3 of the support framework.
  • the receptacle 16 for the die 17 can be moved vertically via guided rods 18 .
  • the movement of the die holder 16 with the die 17 is served by a torque motor 19, which drives a threaded rod 20 coaxial with the axis of rotation of the motor.
  • the threaded rod 20 forms a screw drive with a nut 21, through which the rotation of the threaded rod 20 is converted into a linear movement of the nut 21.
  • the assembly comprising the torque motor and the screw drive is shown separately in FIG.
  • the nut 21 bears against a plate 22 which is rigidly connected to the die holder 16 via the guided rods 18 .
  • An anti-rotation device 23 acting on the plate 22 ensures that no torque is introduced into the die receptacle 16 .
  • the threaded rod 20 is fixed radially and axially to the support frame by bearings, not shown, so that it can be loaded radially and in both axial directions and the torque motor 19 is vertically relieved.
  • a rotary encoder (not shown) that is coaxial with the torque motor 19 detects the rotor speed.
  • the reference number 26 indicates a measuring device which directly determines the vertical position of the die holder 16 or the die 17 .
  • the die 17 is filled with powder material 27 with the aid of a filling device (not shown). wherein the die 17, the upper punch 12 and the lower punch 15 to each other in Figure 2a assume the position shown.
  • the die 17 is then further lowered, while the upper punch 12 moves up again.
  • the in Figure 2c In the positions of the stamp and the die shown, the compact 28 is exposed and can be removed from the powder press. Weighted traversing profiles of the die make it possible to implement other pressing processes that are not shown.
  • the torque motor 19 ensures the associated vertical movements of the die 17, with the nut 21 being vertically linearly moved by rotating the threaded rod 20 and the movement of the nut is transferred via the plate 22 and the rods 18 to the die receptacle 16 and thus to the die 17.
  • the movement of the die 17 is controlled as a function of the signal from the rotary encoder mentioned above, which detects the angular position of the crank mechanism.
  • the control is based on a predetermined, freely programmable in the device shown relationship between the position of the die and this angular position.
  • the control device calculates specifications for the position of the die that can be detected by the measuring device 26 as a function of the position of the bar head 10.
  • a braking device prevents the threaded rod 20 from rotating when the torque motor 19 is in a de-energized state.
  • one or more electromechanically driven additional axes could be provided in addition to the electromechanical drive shown, e.g.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)

Description

Die Erfindung betrifft eine Presse zur Herstellung von Presslingen aus Pulvermaterial, das durch einander entgegenwirkende Stempel in einer Matrize gepresst wird, mit einer Aufnahme für einen unteren Stempel, die feststehend an einem Trägerrahmengestell abgestützt ist, mit einer durch kurbelgetriebene Zugstangen bewegbaren Aufnahme für einen oberen Stempel und mit einer Antriebseinrichtung für die Matrize.The invention relates to a press for producing compacts from powder material which is pressed by counteracting punches in a die, with a seat for a lower punch which is fixedly supported on a supporting frame structure, with a seat for an upper punch which can be moved by crank-driven drawbars and with a drive device for the die.

Eine solche Pulverpresse ist aus DE 41 14 880 A1 bekannt. Der obere Stempel dieser bekannten Pulverpresse wird durch vertikale Zugstangen bewegt, die über Pleuelstangen an Exzenter angelenkt sind. Die Exzenter befinden sich auf einer in einem Fußteil der Pulverpresse untergebrachten Hauptwelle, die durch ein Schneckengetriebe angetrieben wird. Entsprechend stehen die vertikale Position des oberen Stempels und der Drehwinkel der Hauptwelle in einem sinus- bzw. cosinusförmigen Zusammenhang. Die Pulverpresse arbeitet nach dem sog. Abzugsverfahren, d.h. zur Freisetzung des hergestellten Presslings wird die Matrize nach dem Pressvorgang nach unten bewegt, so dass der untere Stempel den Pressling aus der Matrize herausdrückt. Zur Bewegung der Matrize dient ein hydraulischer Antrieb. Aus JP H05 57498 A geht eine Pulverpresse mit einem kurbelgetriebenen Oberstempel und einem elektromechanischen Antrieb für die Matrize hervor.Such a powder press is out DE 41 14 880 A1 known. The upper punch of this known powder press is moved by vertical tie rods, which are linked to eccentrics via connecting rods. The eccentrics are located on a main shaft, which is located in a base part of the powder press and is driven by a worm gear. Correspondingly, the vertical position of the upper punch and the angle of rotation of the main shaft are in a sine or cosine relationship. The powder press works according to the so-called extraction method, ie to release the compact produced, the die is moved down after the pressing process so that the lower punch pushes the compact out of the die. A hydraulic drive is used to move the die. Out of JP H05 57498 A is a powder press with a crank-driven upper punch and an electromechanical drive for the die.

Aus JP H01 104500 A geht eine Pulverpresse gemäss dem Oberbegriff des Anspruchs 1 mit einem oberen und einem unteren Pressstempel hervor, wobei sowohl der obere als auch untere Pressstempel jeweils durch einen Elektromotor antreibbar ist.Out of JP H01 104500 A discloses a powder press according to the preamble of claim 1 with an upper and a lower ram, wherein both the upper and the lower ram can each be driven by an electric motor.

Der Erfindung liegt die Aufgabe zugrunde, eine neue Pulverpresse der eingangs genannten Art zu schaffen, die eine präzisere Steuerung der Bewegung der Matrize ermöglicht.The invention is based on the object of creating a new powder press of the type mentioned at the outset, which enables more precise control of the movement of the die.

Eine Pulverpresse mit den Merkmalen des Anspruchs 1 löst diese Aufgabe.A powder press with the features of claim 1 solves this problem.

Erfindungsgemäß sind ein durch kurbelgetriebene Zugstangen bewegter oberer Stempel und eine elektromechanisch durch einen Elektromotor und dazu koaxialen Gewindetrieb bewegte Matrize miteinander kombiniert. Vorteilhaft erlaubt in dieser Kombination der elektromechanische Antrieb eine exakt auf die Bewegung des oberen Stempels abgestimmte Bewegung der Matrize.According to the invention, an upper punch, which is moved by crank-driven drawbars, and a die, which is moved electromechanically by an electric motor and a screw drive coaxial thereto, are combined with one another. Advantageously, in this combination, the electromechanical drive allows a movement of the die that is precisely matched to the movement of the upper punch.

Vorzugsweise weist der elektromechanische Antrieb zumindest einen Torquemotor auf, der ein über den nahezu gesamten Drehzahlbereich konstantes Drehmoment erzeugt.The electromechanical drive preferably has at least one torque motor, which generates a torque that is constant over almost the entire speed range.

Der Rotor des Elektromotors steht zweckmäßig in direkter Antriebsverbindung mit dem Gewindetrieb, insbesondere der Gewindestange des Gewindetriebs, ggf. über eine bei hoher Belastung durchdrehende Rutschkupplung.The rotor of the electric motor is expediently in direct drive connection with the screw drive, in particular the threaded rod of the screw drive, possibly via a slipping clutch that spins under high loads.

Insbesondere kann es sich bei dem Rotor des Elektromotors um eine Hohlwelle handeln, innerhalb der sich in einer weiteren vorteilhaften Ausführungsform der Erfindung der Gewindetrieb platzsparend zumindest teilweise anordnen lässt.In particular, the rotor of the electric motor can be a hollow shaft within which, in a further advantageous embodiment of the invention, the screw drive can be arranged at least partially in a space-saving manner.

Die Gewindestange eines Gewindetriebs ist an einem Trägerrahmengestell der Pulverpresse axial und radial gelagert. Vorteilhaft hält diese Lagerung durch die Gewindestange zu übertragende Lasten in beiden axialen Richtungen von dem Elektromotor fern.The threaded rod of a screw drive is mounted axially and radially on a support frame of the powder press. Advantageously, this bearing keeps loads to be transmitted through the threaded rod away from the electric motor in both axial directions.

Bei der genannten Lagerung kann es sich z.B. um eine Axial-Pendelrollenlagerung handeln.The bearing mentioned can, for example, be an axial spherical roller bearing.

Der Gewindetrieb selbst umfasst vorzugsweise einen Rollen-, Kugel- oder Planeten-Wälz-Gewindetrieb.The screw drive itself preferably comprises a roller, ball or planetary roller screw drive.

In vorteilhafter Ausgestaltung der Erfindung weist der elektromechanische Antrieb eine die Einleitung von Drehmomenten in die Matrize verhindernde Drehsicherung auf. Der Gewindetrieb setzt somit die Drehbewegung des Elektromotors in eine reine Linearbewegung der Matrize um.In an advantageous embodiment of the invention, the electromechanical drive has an anti-rotation device that prevents torque from being introduced into the die. The screw drive thus converts the rotary movement of the electric motor into a purely linear movement of the die.

In weiterer vorteilhafter Ausgestaltung der Erfindung ist ein Messsystem zur direkten Messung der Position der Matrize vorgesehen. Vorzugsweise erfasst darüber hinaus ein Drehgeber die Drehzahl des Elektromotors.In a further advantageous embodiment of the invention, a measuring system is provided for directly measuring the position of the matrix. In addition, a rotary encoder preferably records the speed of the electric motor.

Vorzugsweise ist der Drehgeber koaxial zu dem Elektromotor angeordnet.The rotary encoder is preferably arranged coaxially to the electric motor.

In einer weiteren vorteilhaften Ausführungsform ist für den Matrizenantrieb eine Kühlung, insbesondere eine Wasserkühlung vorgesehen, welche eine Erhitzung des Elektromotors, insbesondere bei hoher Betriebstaktfrequenz, verhindert und damit eine höhere Leistung im Dauerbetrieb ermöglicht.In a further advantageous embodiment, cooling, in particular water cooling, is provided for the die drive, which prevents the electric motor from heating up, in particular at high operating clock frequencies, and thus enables higher performance in continuous operation.

Vorteilhaft kann ferner eine Bremseinrichtung vorgesehen sein, die im stromlosen Zustand des Elektromotors ungewollten Drehungen des Gewindetriebs entgegenwirkt.Furthermore, a braking device can advantageously be provided, which counteracts undesired rotations of the screw drive when the electric motor is in a de-energized state.

In weiterer Ausgestaltung der Erfindung ist eine Steuerung vorgesehen, welche die Position der Matrize in Abhängigkeit von der Winkelposition des Kurbeltriebs der Zugstangen oder direkt der Position des Oberstempels anhand eines vorgegebenen, vorzugsweise freiprogrammierbaren Zusammenhangs zwischen den betreffenden Positionen einstellt. Das oben genannte Messsystem zur direkten Messung der Position der Matrize und der die Drehzahl des Elektromotors erfassende Drehgeber sind neben einem die Winkelposition des Kurbeltriebs erfassenden Drehgeber Bestandteile dieser Steuerung.In a further embodiment of the invention, a controller is provided which adjusts the position of the die depending on the angular position of the crank drive of the tie rods or directly on the position of the upper punch using a predetermined, preferably freely programmable relationship between the relevant positions. The above-mentioned measuring system for direct measurement of the position of the die and the rotary encoder that records the speed of the electric motor are part of this control system, along with a rotary encoder that records the angular position of the crank mechanism.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels und der beiliegenden, sich auf dieses Ausführungsbeispiel beziehenden Zeichnungen weiter erläutert. Es zeigen:

Fig. 1
eine Pulverpresse nach der Erfindung in Frontansicht,
Fig. 2
eine den Pressvorgang in der Pulverpresse von Fig. 1 erläuternde Darstellung, und
Fig. 3
eine In der Pulverpresse von Fig. 1 verwendete Baugruppe für den Antrieb der Matrize.
The invention is explained in more detail below using an exemplary embodiment and the accompanying drawings relating to this exemplary embodiment. Show it:
1
a powder press according to the invention in front view,
2
one the pressing process in the powder press from 1 explanatory presentation, and
3
one in the powder press from 1 assembly used to drive the die.

Eine in Fig. 1 gezeigte Pulverpresse weist ein auf einem Trägerboden 1 aufstellbares Trägerrahmengestell auf. Von einem im Umriss quaderförmigen Hauptsockel 2 des Trägerrahmengestells erstrecken sich vertikale Trägersäulen 3.one inside 1 The powder press shown has a support frame that can be erected on a support base 1 . Vertical support columns 3 extend from a main base 2 of the support frame, which is cuboid in outline.

In dem Hauptsockel 2 ist nahe dem Sockelboden eine Hauptwelle 5 mit Exentern an Ihren Enden untergebracht. An die Exzenter ist jeweils eine Pleuelstange 6 angelenkt. Die Pleuelstangen 6 stehen in Gelenkverbindung mit sich vertikal entlang der vertikalen Trägersäulen 3 erstreckenden Zugstangen 7. Ein nicht gezeigter Drehgeber erfasst die Winkelposltfon dieses Kurbeltriebs.A main shaft 5 with eccentrics at its ends is accommodated in the main base 2 near the base floor. A connecting rod 6 is articulated on each of the eccentrics. The connecting rods 6 are articulated with tie rods 7 extending vertically along the vertical support columns 3. A rotary encoder (not shown) detects the angular position of this crank mechanism.

Die Hauptwelle 5 lässt sich mit Hilfe eines Hochleistungsschneckengetriebes 8 um Ihre horizontale Achse drehen. Das Hochleistungsschneckengetriebe 8 steht in Antriebsverbindung mit einem nicht gezeigten Antriebsmotor.The main shaft 5 can be rotated around its horizontal axis with the help of a high-performance worm gear 8 . The high-performance worm gear 8 is drivingly connected to a drive motor, not shown.

Die Zugstangen 7 stehen Ober einen Stangenkopf 10 in Verbindung mit einer durch die Zugstangen 7 vertikal bewegbaren Aufnahme 11 für einen in Fig. 2 gezeigten oberen Stempel 12. Durch eine Versteileinrichtung 13 lässt sich die Position des oberen Stempels 12 relativ zum Stangenkopf 10 verändern. Eine bei 14 gezeigte Vorrichtung erzeugt eine in Pressrichtung zusätzliche Bewegung, die in ihrer Kraft frei programmierbar ist.The tie rods 7 are connected via a rod head 10 to a receptacle 11, which can be moved vertically by the tie rods 7, for an in 2 upper punch 12 shown. By means of an adjustment device 13, the position of the upper punch 12 relative to the rod head 10 can be changed. A device shown at 14 generates an additional movement in the pressing direction, the force of which is freely programmable.

Zwischen der Aufnahme 11 für den oberen Stempel 12 und einer Aufnahme 9 für einen unteren Stempel 15 ist eine Aufnahme 16 für eine Matrize 17 angeordnet. Der untere Stempel 15 und die Matrize 17 sind wie der obere Stempel 12 in Fig. 2 gezeigt. Die Aufnahme 9 für den unteren Stempel 15 ist feststehend und durch die Trägersäulen 3 des Trägerrahmengestells abgestützt. Die Aufnahme 16 für die Matrize 17 lässt sich dagegen über geführte Stangen 18 vertikal bewegen.Between the receptacle 11 for the upper punch 12 and a receptacle 9 for a lower punch 15, a receptacle 16 for a die 17 is arranged. The lower punch 15 and die 17 are like the upper punch 12 in 2 shown. The seat 9 for the lower punch 15 is fixed and supported by the support columns 3 of the support framework. In contrast, the receptacle 16 for the die 17 can be moved vertically via guided rods 18 .

Der Bewegung der Matrizenaufnahme 16 mit der Matrize 17 dient ein Torquemotor 19, der eine zur Motordrehachse koaxiale Gewindestange 20 antreibt. Die Gewindestange 20 bildet mit einer Mutter 21 einen Gewindetrieb, durch den die Drehung der Gewindestange 20 in eine Linearbewegung der Mutter 21 umgesetzt wird. Die den Torquemotor und den Gewindetrieb umfassende Baugruppe ist in Fig. 3 gesondert dargestellt.The movement of the die holder 16 with the die 17 is served by a torque motor 19, which drives a threaded rod 20 coaxial with the axis of rotation of the motor. The threaded rod 20 forms a screw drive with a nut 21, through which the rotation of the threaded rod 20 is converted into a linear movement of the nut 21. The assembly comprising the torque motor and the screw drive is shown separately in FIG.

Die Mutter 21 liegt gegen eine Platte 22 an, die über die geführten Stangen 18 starr mit der Matrizenaufnahme 16 verbunden ist. Eine an der Platte 22 angreifende Verdrehsicherung 23 sorgt dafür, dass in die Matrizenaufnahme 16 kein Drehmoment eingeleitet wird.The nut 21 bears against a plate 22 which is rigidly connected to the die holder 16 via the guided rods 18 . An anti-rotation device 23 acting on the plate 22 ensures that no torque is introduced into the die receptacle 16 .

Bei 24 ist die Gewindestange 20 an dem Trägerrahmengestell durch nicht gezeigte Lagerungen radial und axial festgelegt, so dass sie radial und in beiden axialen Richtungen belastbar und der Torquemotor 19 vertikal entlastet ist.At 24, the threaded rod 20 is fixed radially and axially to the support frame by bearings, not shown, so that it can be loaded radially and in both axial directions and the torque motor 19 is vertically relieved.

Ein nicht gezeigter, zu dem Torquemotor 19 koaxialer Drehgeber erfasst die Rotordrehzahl. Die Bezugszahl 26 weist auf eine Messeinrichtung hin, welche direkt die vertikale Position der Matrizenaufnahme 16 bzw. der Matrize 17 ermittelt.A rotary encoder (not shown) that is coaxial with the torque motor 19 detects the rotor speed. The reference number 26 indicates a measuring device which directly determines the vertical position of the die holder 16 or the die 17 .

Im Betrieb der vorangehend beschriebenen Pulverpresse wird die Matrize 17 mit Hilfe einer (nicht gezeigten) Befüllungseinrichtung mit Pulvermaterial 27 befüllt. wobei die Matrize 17, der obere Stempel 12 und der untere Stempel 15 zueinander die in Fig. 2a gezeigte Position einnehmen.During operation of the powder press described above, the die 17 is filled with powder material 27 with the aid of a filling device (not shown). wherein the die 17, the upper punch 12 and the lower punch 15 to each other in Figure 2a assume the position shown.

Bei dem sich anschließenden Pressvorgang werden sowohl der obere Stempel 12 als auch die Matrize 17 nach unten bewegt, während der untere Stempel 15 an Ort und Stelle verbleibt. Fig. 2b zeigt die Positionen der Stempel und der Matrize am Ende des Pressvorgangs.In the subsequent pressing process, both the upper punch 12 and the die 17 are moved downwards, while the lower punch 15 remains in place. Figure 2b shows the positions of the punches and the die at the end of the pressing process.

Um den erzeugten Pressling 28 aus der Matrize zu entfernen, wird nachfolgend die Matrize 17 weiter abgesenkt, während sich der obere Stempel 12 wieder nach oben bewegt. In den in Fig. 2c gezeigten Positionen der Stempel und der Matrize liegt der Pressling 28 frei und kann der Pulverpresse entnommen werden. Gewichtete Verfahrprofile der Matrize ermöglichen die Realisierung weiterer nicht dargestellter Pressverfahren.In order to remove the compact 28 produced from the die, the die 17 is then further lowered, while the upper punch 12 moves up again. in the in Figure 2c In the positions of the stamp and the die shown, the compact 28 is exposed and can be removed from the powder press. Weighted traversing profiles of the die make it possible to implement other pressing processes that are not shown.

Während bei diesen Vorgängen der obere Stempel 12 durch Drehung der Hauptwelle 5 über die Zugstangen 7 vertikal bewegt wird, sorgt der Torquemotor 19 jeweils für die zugehörigen vertikalen Bewegungen der Matrize 17, wobei durch Drehung der Gewindestange 20 die Mutter 21 vertikal linear bewegt und die Bewegung der Mutter über die Platte 22 und die Stangen 18 auf die Matrizenaufnahme 16 und damit die Matrize 17 übertragen wird.During these operations, while the upper punch 12 is moved vertically by rotating the main shaft 5 via the tie rods 7, the torque motor 19 ensures the associated vertical movements of the die 17, with the nut 21 being vertically linearly moved by rotating the threaded rod 20 and the movement of the nut is transferred via the plate 22 and the rods 18 to the die receptacle 16 and thus to the die 17.

Die Bewegung der Matrize 17 wird in Abhängigkeit vom Signal des oben genannten, die Winkelposition des Kurbeltriebs erfassenden Drehgebers gesteuert. Die Steuerung erfolgt anhand eines vorgegebenen, bei der gezeigten Vorrichtung freiprogrammierbaren Zusammenhangs zwischen der Position der Matrize und dieser Winkelposition. Die Steuervorrichtung berechnet Vorgaben für die durch die Messeinrichtung 26 erfassbare Position der Matrize in Abhängigkeit von der Position des Stangenkopfs 10.The movement of the die 17 is controlled as a function of the signal from the rotary encoder mentioned above, which detects the angular position of the crank mechanism. The control is based on a predetermined, freely programmable in the device shown relationship between the position of the die and this angular position. The control device calculates specifications for the position of the die that can be detected by the measuring device 26 as a function of the position of the bar head 10.

Indem die Matrize 17 durch den Torquemotor 19 in beiden vertikalen Richtungen bewegt werden muss, wird die Axiallagerung 24, bei der es sich in dem gezeigten Ausführungsbeispiel um eine Axial-Pendelrollenlagerung handelt, in beiden vertikalen Richtungen belastet.Because the die 17 has to be moved in both vertical directions by the torque motor 19, the axial bearing 24, which in the exemplary embodiment shown is an axial spherical roller bearing, is loaded in both vertical directions.

Eine nicht gezeigte Bremseinrichtung verhindert Drehungen der Gewindestange 20 im stromlosen Zustand des Torquemotors 19.A braking device, not shown, prevents the threaded rod 20 from rotating when the torque motor 19 is in a de-energized state.

Abweichend von dem vorangehend beschriebenen Beispiel könnten über den gezeigten elektromechanischen Antrieb hinaus eine oder mehrere elektromechanisch angetriebene Zusatzachsen vorgesehen sein, z.B. Pressachsen in Form von Ober- und Unterstempeln, die in einer Formkassette untergebracht sind, oder ein elektromechanischer Füllantrieb.Deviating from the example described above, one or more electromechanically driven additional axes could be provided in addition to the electromechanical drive shown, e.g.

Claims (15)

  1. Press for producing compact bodies (28) from powder material (27), which is pressed by rams (12, 15) which act counter to one another in a die (17), having a holder (9) for a lower ram (15), said holder being supported on a support frame in a stationary manner, having a holder (11) for an upper ram (12), said holder being movable by crank-driven pull rods (7), and having a drive device for the die (17), characterized
    in that the drive device for the die (17) comprises at least one electromechanical drive unit (19-21) having at least one electric motor (19) and at least one screw drive (20, 21) formed by a threaded rod (20) and a nut (21), wherein a thread axis of the screw drive (20, 21) is arranged coaxially with respect to the rotor of the electric motor (19), the screw drive (20, 21) converts a rotation of the threaded rod (20) into a linear movement of the nut (21) and the nut (21) bears against a plate (22) which is rigidly connected to a die holder (16) via guided rods (18).
  2. Press according to Claim 1,
    characterized
    in that the electromechanical drive (19-21) comprises a torque motor (19).
  3. Press according to Claim 1 or 2,
    characterized
    in that the rotor is in direct drive connection with the screw drive (20, 21), in particular the threaded rod (20) of the screw drive (20, 21).
  4. Press according to Claim 3,
    characterized
    in that the rotor is in direct drive connection with the screw drive (20, 21) via a slip clutch which spins in the case of high loading.
  5. Press according to one of Claims 1 to 4,
    characterized
    in that the rotor of the electric motor (19) is in the form of a hollow shaft.
  6. Press according to Claim 5,
    characterized
    in that the screw drive is at least partially arranged within the hollow shaft.
  7. Press according to one of Claims 3 to 6,
    characterized
    in that the threaded rod (20) of the screw drive (20, 21) is mounted on the support frame so as to be loadable radially and in both axial directions.
  8. Press according to one of Claims 1 to 7,
    characterized
    in that the screw drive (20, 21) is a roller screw drive, ball screw drive or planetary roller screw drive.
  9. Press according to one of Claims 1 to 8,
    characterized
    in that a rotation-prevention means (23) which prevents the introduction of torques into a die holder (16) is provided.
  10. Press according to one of Claims 1 to 9,
    characterized
    in that a measurement system (26) for the direct measurement of the position of a die holder (16) is provided.
  11. Press according to one of Claims 1 to 10,
    characterized
    in that a rotary encoder which captures the rotational speed of the electric motor (19) is provided.
  12. Press according to Claim 11,
    characterized
    in that the rotary encoder (25) is arranged coaxially with respect to the electric motor (19).
  13. Press according to one of Claims 1 to 12,
    characterized
    in that the die drive has a cooling system, in particular a water cooling system.
  14. Press according to one of Claims 7 to 13,
    characterized
    in that a brake device which prevents undesired rotations of the screw drive (20, 21) is provided.
  15. Press according to one of Claims 1 to 14,
    characterized
    in that a control system is provided, which sets the position of a die holder (16) in dependence on the angular position of the crank drive of the pull rods (7) or directly on the position of the rod head (10) on the basis of a predefined, preferably freely programmable relationship between the positions.
EP13719715.8A 2012-05-02 2013-04-11 Powder press Active EP2844456B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012103807A DE102012103807A1 (en) 2012-05-02 2012-05-02 powder Press
PCT/DE2013/100133 WO2013163988A1 (en) 2012-05-02 2013-04-11 Powder press

Publications (2)

Publication Number Publication Date
EP2844456A1 EP2844456A1 (en) 2015-03-11
EP2844456B1 true EP2844456B1 (en) 2022-09-28

Family

ID=48236627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13719715.8A Active EP2844456B1 (en) 2012-05-02 2013-04-11 Powder press

Country Status (3)

Country Link
EP (1) EP2844456B1 (en)
DE (1) DE102012103807A1 (en)
WO (1) WO2013163988A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3536493A1 (en) * 2018-03-05 2019-09-11 Arcofil S.A. Electric press with torque motor
CN111496247B (en) * 2020-06-03 2024-08-30 荆州九菱科技股份有限公司 Blank pressing device and method for iron core for automobile starter switch
CN118168884B (en) * 2024-05-14 2024-08-16 中国科学院过程工程研究所 Powder pressing and detecting sample feeding device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01104500A (en) * 1987-10-14 1989-04-21 Hitachi Metals Ltd Automatic correcting device for forming condition of press
DE4114880A1 (en) * 1990-05-09 1991-11-14 Komage Gellner & Co Maschinenf Preform press for compacting powdered materials - has mechanical and hydraulic drive system which may by controlled in relation to each other for high prodn. of critical preforms
JPH0557498A (en) * 1991-08-31 1993-03-09 Fanuc Ltd Motor driven powder compacting machine
WO2012022720A1 (en) * 2010-08-15 2012-02-23 Schuler Pressen Gmbh Drawing press with a static blank holder

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10011859C2 (en) * 2000-03-10 2002-05-29 Carsten Winter Press-in
AT507470B1 (en) * 2008-10-16 2010-08-15 Trumpf Maschinen Austria Gmbh DRIVE DEVICE FOR THE PRESSURE BAR OF A BENDING PED
EP2311587A1 (en) * 2009-10-13 2011-04-20 Osterwalder AG Powder press
DE102009055739B4 (en) * 2009-11-26 2021-01-14 Langenstein & Schemann Gmbh Forming machine, especially servo press

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01104500A (en) * 1987-10-14 1989-04-21 Hitachi Metals Ltd Automatic correcting device for forming condition of press
DE4114880A1 (en) * 1990-05-09 1991-11-14 Komage Gellner & Co Maschinenf Preform press for compacting powdered materials - has mechanical and hydraulic drive system which may by controlled in relation to each other for high prodn. of critical preforms
JPH0557498A (en) * 1991-08-31 1993-03-09 Fanuc Ltd Motor driven powder compacting machine
WO2012022720A1 (en) * 2010-08-15 2012-02-23 Schuler Pressen Gmbh Drawing press with a static blank holder

Also Published As

Publication number Publication date
DE102012103807A1 (en) 2013-11-07
WO2013163988A1 (en) 2013-11-07
EP2844456A1 (en) 2015-03-11

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