EP2165784B1 - Device and method for automatically centring die holders of a stamping machine - Google Patents

Device and method for automatically centring die holders of a stamping machine Download PDF

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Publication number
EP2165784B1
EP2165784B1 EP08016387A EP08016387A EP2165784B1 EP 2165784 B1 EP2165784 B1 EP 2165784B1 EP 08016387 A EP08016387 A EP 08016387A EP 08016387 A EP08016387 A EP 08016387A EP 2165784 B1 EP2165784 B1 EP 2165784B1
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EP
European Patent Office
Prior art keywords
tool holder
detection means
detecting
punching machine
punching
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.)
Not-in-force
Application number
EP08016387A
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German (de)
French (fr)
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EP2165784A1 (en
Inventor
Werner Erlenmaier
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.)
Trumpf Werkzeugmaschinen SE and Co KG
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Trumpf Werkzeugmaschinen SE and Co KG
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Application filed by Trumpf Werkzeugmaschinen SE and Co KG filed Critical Trumpf Werkzeugmaschinen SE and Co KG
Priority to AT08016387T priority Critical patent/ATE512734T1/en
Priority to EP08016387A priority patent/EP2165784B1/en
Priority to JP2009206602A priority patent/JP5436107B2/en
Publication of EP2165784A1 publication Critical patent/EP2165784A1/en
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Publication of EP2165784B1 publication Critical patent/EP2165784B1/en
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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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/04—Centering the work; Positioning the tools

Definitions

  • the invention relates to a device and a method for automatically centering the upper and the lower tool holder of a punching machine to each other according to the preamble of claims 1 and 8.
  • the upper and lower tool holder punching machines are usually adjusted to each other in the final assembly in the factory.
  • the center axes of the upper tool holder, the punching head, and the lower tool holder, the recording of the die brought to coincide. This is done manually with the help of dial gauges.
  • One of the two tool holders, usually the lower tool holder, is thereby adjusted with light hammer blows so that the deviation in the X direction, horizontally in the transverse direction to the C frame and in the Y direction, horizontally in the direction of the C frame, within a defined Tolerance range of ⁇ 0.01 mm.
  • the adjustment of the tool holders is carried out with a "warm” machine.
  • the individual components of the "cold” machines are not at their respective operating temperatures, the temperatures of the components are substantially equal to room temperature.
  • the deviation of the axes of the upper and lower tool holder are usually between a “cold” and a “warm” machine to 0.03 mm.
  • the kerf is about 10% of the sheet thickness.
  • the punch press is readjusted under operating conditions. These requirements may e.g. the punching of rubber, or a lesser punch burr.
  • the use of tools with a smaller kerf results in a larger cutting area over the sheet thickness, which is particularly advantageous in the production of a thread.
  • these increased requirements sometimes require a readjustment of the machine after shorter times, possibly even after a few hours.
  • the service life of the tools is increased with a uniform stress by an accurate centering of the tools.
  • Patent Abstract of Japan JP 07112225 shows a punching machine with recorded on respective robot arms punch and die with a means for centering the punch and the die. After punching a reference hole, the robot arms are aligned using a CCD camera and the output information.
  • the device offers the possibility of automatically centering the upper tool holder to the lower tool holder by having a detection means, a controller and actuators.
  • Fig. 1 is a perspective view of a punching machine 1.
  • An essential part of the punching machine 1 is a C-frame 2.
  • the C-frame 2 consists of a torsionally rigid welded steel construction.
  • a hydraulic unit 3 which drives the movement of the plunger 6.
  • a lower tool holder 4 for receiving later-described dies 5 of punching tools 14 is provided on the lower inside of the C-frame 2.
  • the die 5 is rotatable about a first rotary drive 18 by 360 ° and lockable in any angular position.
  • a plunger 6 is provided with a punching head 7.
  • the punching head 7 takes a in Fig. 2 shown punch 8 of the punching tool 14.
  • the punching head 7 is also rotatable in accordance with the die 5 by 360 ° and can also be found in any angular position. For a second rotary drive 25 is available.
  • the rotary actuators 18, 25 are of a in Fig. 3 controlled machine control device 21 controlled, which is provided in a separate cabinet. Furthermore, a plunger control 9, as well as all linear drives for moving a sheet 10 and actuators for special functions by the machine control device 21 is controlled.
  • the control device 21 has as input and output means a keyboard and a monitor. The control functions are performed by microcontrollers. Processing programs and operating parameters are stored in a memory area of the control device 21.
  • the engine control device 21 also performs the control of an in.
  • the control device of the device 19 may also be designed as a separate assembly, and thus be retrofitted in existing punching machines.
  • a machine table 11 and a transverse rail 12 with a linear magazine 15 is also arranged.
  • clamping claws 13 are arranged for clamping the sheet 10.
  • the clamping claws 13 can be fastened at suitable locations on the transverse rail 12.
  • the clamping claws 13 can be offset so that the sheet 10 is securely gripped, but they do not grab the sheet 10 on a surface to be machined.
  • recordings for the punching tools 14 are available.
  • the machine table 11 moves in the Y direction together with the cross rail 12, to which the sheet 10 is fixed with the clamping jaws 13, in a defined position, and the cross rail 12 moves in the X direction in the defined position, wherein the sheet 10 slides over the machine table 11. Then, a punching stroke is performed by the plunger 6. Following this, the next punching position is approached with the same principle.
  • the punching tools 14 are automatically changed, controlled by the machine control device 21, changed.
  • the cross rail 12, driven by a linear drive, not shown, moves into a position in the X direction, so that the X position of the tool to be loaded corresponds to the X position of the lower tool holder 4.
  • the cross rail 12 then moves, together with the machine table 11, driven by a further linear drive, in a position in the Y direction, in a central axis A 1 of the die 5 and the punch 8 coincide with a central axis A 2 of the lower tool holder 4 and the plunger 6, so that the die 5 can be received in the lower tool holder 4, and the punch 8 is received in the plunger 6 can be. If a tool is present in the plunger 6 and the lower tool holder 4, this is previously given to a free space in the linear magazine.
  • Fig. 2 shows a punching tool 14, the punch 8 and the die 5 with an incision gap occurring.
  • the punch 8 here has a cylindrical shape and the die 5 has a slightly conical bore to prevent seizure of the punch 8 and the die 5.
  • the cutting gap u is the difference of the outer dimension of the punch 8 and the inner dimension of the die 5 in the respective sectional view. For a high-quality punching result, the cutting gap must be as small as possible ( ⁇ 10% of the sheet thickness) and uniform, resulting in a uniform and low cutting edge.
  • Fig. 3 is a schematic representation of an embodiment of the inventive device 19 for automatically centering the tool holders.
  • the insert 17 is received.
  • the insert 17 has the same outer contours as that of the die 5 of the punching tool 14. As a result, the insert 17 is positively and play-free in the lower tool holder. 4 exactly centered.
  • the insert 17 has a cylindrical bore, which is also exactly centered.
  • the device 19 furthermore has the detection means 16.
  • the detecting means 16 has on its upper side a receiving pin, not shown, which is identical to the receiving pin of the punch 8, on. With the help of this locating pin, the punch 8 is positively and without play in the upper tool holder, the plunger 6 added so that it is centered exactly to the plunger 6.
  • a sensor element such as a known from measuring machines probe 20, with an arm having a ruby ball at its front end, out of the detection means 16 out.
  • the button 20 is biased by a spring so that it is at rest in its outermost position.
  • the button 20 is pressed inwards, so that it rests with its outer periphery on the inner surface of the insert 17.
  • the vote of the detection means 16 with the insert 17 is taken to ensure that the center of the ball of the probe 20 is within the opening of the insert 17, so that the ball can enter into the bore, the circumference of the ball of the probe 20 but safe rests against the inner surface of the insert 17.
  • another operating principle such as an optical, magnetic or capacitive sensor can be used.
  • a known evaluation unit with an accuracy of at least 0.001 mm is provided inside the detection means 16.
  • the detection means 16 is connected to the machine control device 21 via a transmission link 22, in this embodiment a radio link. About these Radio link, the signal in which the deflection of the probe 20 has been converted by the evaluation unit, transmitted.
  • the transmission link 22 as a radio link requires no cable connection and is thus suitable for automatic replacement of the detection device 19.
  • the transmission link 22 may also be formed by a cable connection, which is a cost-effective, space-saving option in an at least partially manual operation, but makes automatic replacement difficult.
  • the lower tool holder 4 is supported by means of linear bearings, not shown, displaceable parallel to the X-axis and Y-axis. With the help of a respective linear drive, the lower tool holder 4 is moved parallel to the X-axis or Y-axis.
  • the linear drives are controlled by the machine control device 21.
  • the linear drives are formed in this embodiment of an electric stepper motor and a spindle gear, which are tuned so that the corresponding accuracy can be achieved.
  • the implementation of the rotational movement of the motor can be made into a linear movement by wedges or eccentrics.
  • locking means are provided. These prevent a displacement of the lower tool holder. 4
  • the detection means 16 by means of the second rotary drive 25 of the plunger 6 exactly in a direction which is parallel to the X-axis, rotated, ie the button 20 is in a direction which is parallel to the X-axis (position A), and detects the deflection of the probe 20.
  • the Deflection is converted into a corresponding signal and transmitted to the machine control device 21 via the transmission path 22.
  • the detection means 16 is again rotated by the second rotary drive 25 of the plunger 6 and the plunger 6 in a first direction by 180 °, so that the probe 20 of the detection means 16 in the opposite direction is parallel to the X-axis (position B), and the deflection of the probe 20 is detected, converted into the corresponding signal and transmitted via the transmission path 22 to the machine control device 21.
  • the detection means 16 is rotated by exactly 90 ° in a second, opposite direction, so that the probe 20 of the detection means 16 is parallel to the Y-axis (position C), detects the offset of the probe 20, converted into the associated signal, and transmitted to the engine control device 21.
  • the detecting means 16 is again rotated by 180 ° in the first direction, so that the probe 20 is in the opposite direction, parallel to the Y-axis (position D), and detects the offset of the probe 20, also converted into the associated signal , and transmitted to the engine control device 21.
  • the machine control device 21 it is determined from the transmitted signals of the detecting means 16 which position the detecting means 16 has in the X direction and Y direction to the insert 17, that is, which offset the detecting means 16 has to the insert 17, which is the offset of the axes of the detection means 16, thus the axis of the upper tool holder, the plunger 6, to the axis of the insert 17, so the lower tool holder 4 represents.
  • the deflection of the probe 20 in the two opposite directions in one axis is identical.
  • the correction values are determined by machine control device 21 and converted into signals for converted the linear drives. These signals are transmitted via signal lines 24 to the actuators, the linear drives and after the release of the locking means by the machine control device 21, the linear actuators are activated. After the adjustment, the locking means are detected by the engine control device 21 again.
  • individual features may be altered.
  • the detection means 16 may also be received in the lower tool receptacle 4 and the insert 17 designed to be received by the plunger 6. The arrangement of the detection means 16 and the insert 17 directly into the tool holders 4, 6, the offset is detected directly.
  • the detection device 16 may also comprise several, e.g. have two or four buttons 20.
  • the centering process is shortened, since the detection of multiple deflections of the probe 20 can take place simultaneously.
  • the detection of the offset of the axes via the deflection of the probe 20 is an accurate simple procedure.
  • the detection device 16 is provided in an alternative embodiment in a tool for detecting a dimension in the Z-direction, parallel to a vertical axis.
  • the counterpart of the detection device 16 accordingly has the other part of the tool.
  • a camera system is provided instead of the detection means 16, the button 20 has.
  • This camera system is arranged on the upper inside of the C-frame 2 and directed to the lower tool holder 4. Via an image evaluation method, the current position of the lower tool holder 4 is determined to an optimum position, and corrects the position of the lower tool holder 4. In this case, point-symmetrical tools can remain in the lower tool holder 4 to the central axis of the tool.
  • the automatic centering device 19 is provided with a machining quality checking means.
  • the device 19 has a camera system. This verifies the presence of very thin webs ( ⁇ 0.2 mm) in the stamped sheet. In the absence of these thin webs an adjustment process is triggered. Instead of the thin webs, other product features can also be used as indicators of accuracy.
  • the adjustment process can be triggered even after a predetermined time, or manually.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Punching Or Piercing (AREA)
  • Machine Tool Sensing Apparatuses (AREA)

Abstract

The device (19) has a control unit (21), an actuator (23) and a detecting unit (16) for detecting a misalignment in X-direction and Y-direction between an upper tool holder and a lower tool holder. The detecting unit is arranged in the upper and lower tool holders of a punching machine. The detecting unit has a sensor element and a camera system. The detecting unit is embedded in a tool for measuring a mass in the Z-direction. An independent claim is included for a method for automatic centering of tool holders of a punching machine.

Description

Die Erfindung betrifft eine Einrichtung und ein Verfahren zum automatischen Zentrieren der oberen und der unteren Werkzeugaufnahme einer Stanzmaschine zueinander gemäß dem Oberbegriff der Ansprüche 1 und 8.The invention relates to a device and a method for automatically centering the upper and the lower tool holder of a punching machine to each other according to the preamble of claims 1 and 8.

Die obere und die untere Werkzeugaufnahme von Stanzmaschinen werden üblicherweise im Rahmen der Endmontage im Herstellerwerk zueinander justiert. Hierbei werden die Mittelachsen der oberen Werkzeugaufnahme, dem Stanzkopf, und der unteren Werkzeugaufnahme, der Aufnahme der Matrize, zur Deckung gebracht. Dies geschieht manuell mit Hilfe von Messuhren. Eine der beiden Werkzeugaufnahmen, üblicherweise die untere Werkzeugaufnahme, wird dabei mit leichten Hammerschlägen so verstellt, dass die Abweichung in X-Richtung, waagrecht in Querrichtung zum C-Rahmen und in Y-Richtung, waagrecht in Richtung des C-Rahmens, innerhalb eines definierten Toleranzbereichs von <0,01 mm liegt.The upper and lower tool holder punching machines are usually adjusted to each other in the final assembly in the factory. Here, the center axes of the upper tool holder, the punching head, and the lower tool holder, the recording of the die, brought to coincide. This is done manually with the help of dial gauges. One of the two tool holders, usually the lower tool holder, is thereby adjusted with light hammer blows so that the deviation in the X direction, horizontally in the transverse direction to the C frame and in the Y direction, horizontally in the direction of the C frame, within a defined Tolerance range of <0.01 mm.

Die Justage der Werkzeugaufnahmen wird bei "warmer" Maschine durchgeführt. Wenn die Maschine nicht im Betrieb war, die einzelnen Komponenten der "kalten" Maschinen also nicht auf ihrer jeweiligen Betriebstemperatur sind, entsprechen die Temperaturen der Komponenten im Wesentlichen der Raumtemperatur. Die Abweichung der Achsen der oberen und unteren Werkzeugaufnahme betragen in der Regel zwischen einer "kalten" und einer "warmen" Maschine bis 0,03 mm.The adjustment of the tool holders is carried out with a "warm" machine. Thus, when the machine was not in operation, the individual components of the "cold" machines are not at their respective operating temperatures, the temperatures of the components are substantially equal to room temperature. The deviation of the axes of the upper and lower tool holder are usually between a "cold" and a "warm" machine to 0.03 mm.

Aus diesem Grund werden üblicherweise Werkzeuge, Stempel und Matrizen mit einem Schnittspalt von 0,05 mm verwendet, was das Stanzen von Blechen von mindestens 0,5 mm erlaubt. Dies verhindert ein Aufsetzen des Stempels auf der Matrize bei den auftretenden Temperaturbedingungen.For this reason, usually tools, punches and dies are used with a cutting gap of 0.05 mm, which allows the stamping of sheets of at least 0.5 mm. This prevents setting of the stamp on the die at the temperature conditions occurring.

Im Betrieb nehmen die einzelnen Komponenten ihre Betriebstemperatur an, was zu einer thermischen Ausdehnung führt. Dadurch verändert sich die Lage der Mittelachsen der oberen und der unteren Werkzeugaufnahme zueinander.During operation, the individual components assume their operating temperature, resulting in thermal expansion. As a result, the position of the center axes of the upper and lower tool holder to each other changed.

Für ein qualitativ durchschnittliches Produktionsergebnis beim Stanzen von Blechen beträgt der Schnittspalt ca. 10% der Blechdicke.For a qualitatively average production result when punching sheet metal, the kerf is about 10% of the sheet thickness.

Bei einer größeren Anforderung an die Genauigkeit oder bei der Verwendung von Stanzwerkzeugen mit einem kleineren Schnittspalt wird die Stanzmaschine bei Betriebsbedingungen neu justiert. Diese Anforderungen können z.B. das Stanzen von Gummi, oder ein geringerer Stanzgrat sein. Bei der Verwendung von Werkzeugen mit einem geringeren Schnittspalt ergibt sich eine größere Schnittfläche über der Blechdicke, was besonders bei der Herstellung eines Gewindes Vorteile bringt. Diese erhöhten Anforderungen bedingen aber teilweise ein Nachjustage der Maschine nach kürzeren Zeiten, ggf. sogar nach einigen Stunden.For a greater requirement for accuracy or when using punching tools with a smaller kerf, the punch press is readjusted under operating conditions. These requirements may e.g. the punching of rubber, or a lesser punch burr. The use of tools with a smaller kerf results in a larger cutting area over the sheet thickness, which is particularly advantageous in the production of a thread. However, these increased requirements sometimes require a readjustment of the machine after shorter times, possibly even after a few hours.

Weiterhin besteht vermehrt die Anforderung, auch Metallfolien mit einer Dicke von unter 0,5 mm zu stanzen, was ebenfalls verringerte Schnittspalte und somit eine größere Genauigkeit der Justage der Werkzeugachsen erfordert. Bei Blechdicken von 0,2 mm ist ein Schnittspalt von 0,02 mm mit einer entsprechenden Fluchtungstoleranz der Werkzeuge erforderlich.Furthermore, there is an increasing demand to also punch metal foils with a thickness of less than 0.5 mm, which also requires reduced kerf and thus greater accuracy of adjustment of the tool axes. For sheet thicknesses of 0.2 mm, a cutting gap of 0.02 mm with a corresponding alignment tolerance of the tools is required.

Desweiteren wird die Standzeit der Werkzeuge bei einer gleichmäßigen Beanspruchung durch eine genaue Zentrierung der Werkzeuge erhöht.Furthermore, the service life of the tools is increased with a uniform stress by an accurate centering of the tools.

Patent Abstract of Japan JP 07112225 zeigt eine Stanzmaschine mit an jeweiligen Roboterarmen aufgenommenen Stempel und Matrize mit einer Einrichtung zum Zentrieren des Stempels und der Matrize. Nach einem Stanzen eines Referenzlochs werden jeweils mit Hilfe einer CCD-Kamera und den Ausgabeinformationen die Roboterarme ausgerichtet.Patent Abstract of Japan JP 07112225 shows a punching machine with recorded on respective robot arms punch and die with a means for centering the punch and the die. After punching a reference hole, the robot arms are aligned using a CCD camera and the output information.

Es ist Aufgabe der vorliegenden Erfindung, eine Einrichtung und ein Verfahren zur automatischen Zentrierung der oberen Werkzeugaufnahme zu der unteren Werkzeugaufnahme einer Stanzmaschine zur Verfügung zu stellen.It is an object of the present invention to provide a device and a method for automatically centering the upper tool holder to the lower tool holder of a punching machine available.

Die Aufgabe wird durch eine Einrichtung mit den Merkmalen des Anspruch 1 und dem Verfahren gemäß Anspruch 8 gelöst. Eine Stanzmaschine mit einer Einrichtung gemäß der Erfindung ist in Anspruch 6 definiert. Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen beschrieben.The object is achieved by a device having the features of claim 1 and the method according to claim 8. A punching machine with a device according to the invention is defined in claim 6. Further developments of the invention are described in the dependent claims.

Die Einrichtung bietet durch das Aufweisen eines Erfassungsmittels, einer Steuerung und von Aktuatoren die Möglichkeit, die Zentrierung der oberen Werkzeugaufnahme zu der unteren Werkzeugaufnahme automatisch durchzuführen.The device offers the possibility of automatically centering the upper tool holder to the lower tool holder by having a detection means, a controller and actuators.

Die Erfindung wird anhand eines Ausführungsbeispiels unter Bezugnahme auf die beigefügten Zeichnungen erläutert.

Fig. 1
ist eine perspektivische Ansicht einer Stanzmaschi- ne mit einer Ausführungsform der erfindungsgemäßen Einrichtung.
Fig. 2
zeigt ein Stanzwerkzeug, einen Stempel und eine Matrize, mit dem auftretenden Schnittspalt.
Fig. 3
ist eine prinzipielle Darstellung einer Ausfüh- rungsform einer erfindungsgemäßen Einrichtung.
Fig. 4
ist eine Draufsicht auf die Ausführungsform der in Fig. 3 dargestellten erfindungsgemäßen Einrichtung.
The invention will be explained with reference to an embodiment with reference to the accompanying drawings.
Fig. 1
is a perspective view of a punching machine with an embodiment of the device according to the invention.
Fig. 2
shows a punching tool, a punch and a die, with the incision gap occurring.
Fig. 3
is a schematic representation of an embodiment of a device according to the invention.
Fig. 4
is a plan view of the embodiment of in Fig. 3 illustrated inventive device.

Fig. 1 ist eine perspektivische Ansicht einer Stanzmaschine 1. Ein wesentlicher Bestandteil der Stanzmaschine 1 ist ein C-Rahmen 2. Der C-Rahmen 2 besteht aus einer torsionssteifen Schweißkonstruktion aus Stahl. Fig. 1 is a perspective view of a punching machine 1. An essential part of the punching machine 1 is a C-frame 2. The C-frame 2 consists of a torsionally rigid welded steel construction.

Am hinteren Ende des C-Rahmens 2 ist ein Hydraulikaggregat 3 vorgesehen, das die Bewegung des Stößels 6 antreibt.At the rear end of the C-frame 2, a hydraulic unit 3 is provided, which drives the movement of the plunger 6.

Auf der unteren Innenseite des C-Rahmens 2 ist eine untere Werkzeugaufnahme 4 zum Aufnehmen von später beschriebenen Matrizen 5 von Stanzwerkzeugen 14 vorgesehen. Die Matrize 5 ist über einen ersten Drehantrieb 18 um 360° drehbar und in jeder beliebigen Winkellage feststellbar.On the lower inside of the C-frame 2, a lower tool holder 4 for receiving later-described dies 5 of punching tools 14 is provided. The die 5 is rotatable about a first rotary drive 18 by 360 ° and lockable in any angular position.

Auf der oberen Innenseite des C-Rahmens 2 ist ein Stößel 6 mit einem Stanzkopf 7 vorgesehen. Der Stanzkopf 7 nimmt einen in Fig. 2 gezeigten Stempel 8 des Stanzwerkzeugs 14 auf. Der Stanzkopf 7 ist in Übereinstimmung mit der Matrize 5 ebenfalls um 360° drehbar und kann ebenfalls in jeder beliebigen Winkellage festgestellt werden. Dafür ist ein zweiter Drehantrieb 25 vorhanden.On the upper inside of the C-frame 2, a plunger 6 is provided with a punching head 7. The punching head 7 takes a in Fig. 2 shown punch 8 of the punching tool 14. The punching head 7 is also rotatable in accordance with the die 5 by 360 ° and can also be found in any angular position. For a second rotary drive 25 is available.

Die Drehantriebe 18, 25 werden von einer in Fig. 3 dargestellten Maschinensteuerungsvorrichtung 21 gesteuert, die in einem separaten Schaltschrank vorgesehen ist. Weiterhin wird auch eine Stößelsteuerung 9, sowie sämtliche Linearantriebe zur Bewegung eines Blechs 10 und Aktuatoren für Sonderfunktionen durch die Maschinensteuerungsvorrichtung 21 gesteuert. Die Steuerungsvorrichtung 21 weist als Ein- und Ausgabemittel eine Tastatur und einen Monitor auf. Die Steuerungsfunktionen werden von Mikrocontrollern ausgeführt. Bearbeitungsprogramme und Betriebsparameter sind in einem Speicherbereich der Steuerungsvorrichtung 21 abgespeichert.The rotary actuators 18, 25 are of a in Fig. 3 controlled machine control device 21 controlled, which is provided in a separate cabinet. Furthermore, a plunger control 9, as well as all linear drives for moving a sheet 10 and actuators for special functions by the machine control device 21 is controlled. The control device 21 has as input and output means a keyboard and a monitor. The control functions are performed by microcontrollers. Processing programs and operating parameters are stored in a memory area of the control device 21.

Die Maschinensteuerungsvorrichtung 21 führt in dieser Ausführungsform ohne großen Mehraufwand auch die Steuerung einer in Fig. 3 gezeigten Einrichtung 19 zum automatischen Zentrieren der oberen und unteren Werkzeugaufnahme durch. In einer alternativen Ausführungsform kann die Steuerungsvorrichtung der Einrichtung 19 auch als separate Baugruppe ausgeführt sein, und somit auch bei bestehenden Stanzmaschinen nachgerüstet werden.The engine control device 21 also performs the control of an in. In this embodiment, without much overhead Fig. 3 shown device 19 for automatically centering the upper and lower tool holder by. In an alternative embodiment, the control device of the device 19 may also be designed as a separate assembly, and thus be retrofitted in existing punching machines.

Auf der unteren Innenseite des C-Rahmens 2 ist ebenfalls ein Maschinentisch 11 und eine Querschiene 12 mit einem Linearmagazin 15 angeordnet. An der Querschiene 12 sind Spannpratzen 13 zum Klemmen des Blechs 10 angeordnet. Die Spannpratzen 13 können an geeigneten Stellen auf der Querschiene 12 befestigt werden. Die Spannpratzen 13 können so versetzt werden, dass das Blech 10 sicher gegriffen wird, aber sie das Blech 10 nicht an einer zu bearbeitenden Fläche greifen. In dem Linearmagazin 15 sind Aufnahmen für die Stanzwerkzeuge 14 vorhanden.On the lower inside of the C-frame 2, a machine table 11 and a transverse rail 12 with a linear magazine 15 is also arranged. At the cross rail 12 clamping claws 13 are arranged for clamping the sheet 10. The clamping claws 13 can be fastened at suitable locations on the transverse rail 12. The clamping claws 13 can be offset so that the sheet 10 is securely gripped, but they do not grab the sheet 10 on a surface to be machined. In the linear magazine 15 recordings for the punching tools 14 are available.

Zum Stanzen fährt der Maschinentisch 11 in Y-Richtung gemeinsam mit der Querschiene 12, an der das Blech 10 mit den Spannpratzen 13 befestigt ist, in eine definierte Position, und die Querschiene 12 fährt in X-Richtung in die definierte Position, wobei das Blech 10 über den Maschinentisch 11 gleitet. Dann wird von dem Stößel 6 ein Stanzhub durchgeführt. Im Anschluss daran wird mit dem selben Prinzip die nächste Stanzposition angefahren.For punching the machine table 11 moves in the Y direction together with the cross rail 12, to which the sheet 10 is fixed with the clamping jaws 13, in a defined position, and the cross rail 12 moves in the X direction in the defined position, wherein the sheet 10 slides over the machine table 11. Then, a punching stroke is performed by the plunger 6. Following this, the next punching position is approached with the same principle.

Die Stanzwerkzeuge 14 werden automatisch, durch die Maschinensteuerungsvorrichtung 21 angesteuert, gewechselt. Dazu fährt die Querschiene 12, angetrieben von einem nicht gezeigten Linearantrieb, in eine Position in der X-Richtung, so dass die X-Position des einzuwechselnden Werkzeugs der X-Position der unteren Werkzeugaufnahme 4 entspricht. Die Querschiene 12 fährt dann, gemeinsam mit dem Maschinentisch 11, angetrieben von einem weiteren Linearantrieb, in eine Position in der Y-Richtung, in der eine Mittelachse A1 der Matrize 5 und des Stempels 8 mit einer Mittelachse A2 der unteren Werkzeugaufnahme 4 und dem Stößel 6 übereinstimmen, so dass die Matrize 5 in die untere Werkzeugaufnahme 4 aufgenommen werden kann, und der Stempel 8 in den Stößel 6 aufgenommen werden kann. Sofern in dem Stößel 6 und der unteren Werkzeugaufnahme 4 ein Werkzeug vorhanden ist, wird dieses vorher an einen freien Platz im Linearmagazin abgegeben.The punching tools 14 are automatically changed, controlled by the machine control device 21, changed. For this purpose, the cross rail 12, driven by a linear drive, not shown, moves into a position in the X direction, so that the X position of the tool to be loaded corresponds to the X position of the lower tool holder 4. The cross rail 12 then moves, together with the machine table 11, driven by a further linear drive, in a position in the Y direction, in a central axis A 1 of the die 5 and the punch 8 coincide with a central axis A 2 of the lower tool holder 4 and the plunger 6, so that the die 5 can be received in the lower tool holder 4, and the punch 8 is received in the plunger 6 can be. If a tool is present in the plunger 6 and the lower tool holder 4, this is previously given to a free space in the linear magazine.

Auf diese Weise kann auch ein in Fig. 3 gezeigtes Erfassungsmittel 16 in den Stempel 8, und ein Einsatz 17 in die untere Werkzeugaufnahme 4 automatisch schnell eingewechselt werden. Alternativ können diese Teile auch manuell in die entsprechenden Werkzeugaufnahmen 4, 6 eingebracht werden, um bei einer Datenübertragung mittels Kabel diese nicht zu beschädigten.This way can also be a in Fig. 3 shown detection means 16 in the punch 8, and an insert 17 are automatically loaded quickly into the lower tool holder 4. Alternatively, these parts can also be manually inserted into the corresponding tool holders 4, 6 in order not to damage them in a data transmission by means of cables.

Fig. 2 zeigt ein Stanzwerkzeug 14, den Stempel 8 und die Matrize 5 mit einem auftretenden Schnittspalt. Der Stempel 8 hat hier eine zylindrische Form und die Matrize 5 eine leicht kegelförmige Bohrung, um ein Fressen des Stempels 8 und der Matrize 5 zu verhindern. Der Schnittspalt u ist die Differenz des Außenmaßes des Stempels 8 und des Innenmaßes der Matrize 5 in der jeweiligen Schnittdarstellung. Für ein qualitativ hochwertiges Stanzergebnis muss der Schnittspalt möglichst klein (< 10% der Blechdicke) und gleichmäßig sein, was einen gleichmäßigen und geringen Schnittgrat ergibt. Fig. 2 shows a punching tool 14, the punch 8 and the die 5 with an incision gap occurring. The punch 8 here has a cylindrical shape and the die 5 has a slightly conical bore to prevent seizure of the punch 8 and the die 5. The cutting gap u is the difference of the outer dimension of the punch 8 and the inner dimension of the die 5 in the respective sectional view. For a high-quality punching result, the cutting gap must be as small as possible (<10% of the sheet thickness) and uniform, resulting in a uniform and low cutting edge.

Fig. 3 ist eine prinzipielle Darstellung einer Ausführungsform der erfindungsgemäßen Einrichtung 19 zum automatischen Zentrieren der Werkzeugaufnahmen. Fig. 3 is a schematic representation of an embodiment of the inventive device 19 for automatically centering the tool holders.

In der unteren Werkzeugaufnahme 4 ist der Einsatz 17 aufgenommen. Der Einsatz 17 weist die gleichen Außenkonturen auf, wie die der Matrize 5 des Stanzwerkzeugs 14. Dadurch ist der Einsatz 17 formschlüssig und spielfrei in der unteren Werkzeugaufnahme 4 genau zentriert. Auf der Innenseite weist der Einsatz 17 eine zylindrische Bohrung auf, die ebenfalls genau zentriert ist.In the lower tool holder 4, the insert 17 is received. The insert 17 has the same outer contours as that of the die 5 of the punching tool 14. As a result, the insert 17 is positively and play-free in the lower tool holder. 4 exactly centered. On the inside, the insert 17 has a cylindrical bore, which is also exactly centered.

Die Einrichtung 19 weist weiterhin das Erfassungsmittel 16 auf. Das Erfassungsmittel 16 weist an seiner oberen Seite einen nicht gezeigten Aufnahmebolzen, der identisch mit den Aufnahmebolzen des Stempels 8 ist, auf. Mit Hilfe dieses Aufnahmebolzens wird der Stempel 8 formschlüssig und spielfrei in der oberen Werkzeugaufnahme, dem Stößel 6 aufgenommen, so dass er genau zu dem Stößel 6 zentriert ist.The device 19 furthermore has the detection means 16. The detecting means 16 has on its upper side a receiving pin, not shown, which is identical to the receiving pin of the punch 8, on. With the help of this locating pin, the punch 8 is positively and without play in the upper tool holder, the plunger 6 added so that it is centered exactly to the plunger 6.

An der unteren Seite ragt ein Sensorelement, beispielsweise ein aus Messmaschinen bekannter Taster 20, mit einem Arm, der an seinem vorderen Ende eine Rubinkugel aufweist, aus dem Erfassungsmittel 16 heraus. Der Taster 20 ist durch eine Feder vorgespannt, so dass er sich im Ruhezustand in seiner äußersten Position befindet. Beim Absenken des Stößels 6 mit dem Erfassungsmittel 16 wird der Taster 20 nach innen gedrückt, so dass er mit seinem äußeren Umfang an der Innenfläche des Einsatzes 17 anliegt. Bei der Abstimmung des Erfassungsmittels 16 mit dem Einsatz 17 wird darauf geachtet, dass sich der Mittelpunkt der Kugel des Tasters 20 innerhalb der Öffnung des Einsatzes 17 befindet, so dass die Kugel in die Bohrung eintreten kann, der Umfang der Kugel des Tasters 20 aber sicher an der Innenfläche des Einsatzes 17 anliegt. In anderen Ausführungsformen kann auch ein anderes Wirkprinzip, wie ein optischer, magnetischer oder kapazitiver Sensor eingesetzt werden.On the lower side protrudes a sensor element, such as a known from measuring machines probe 20, with an arm having a ruby ball at its front end, out of the detection means 16 out. The button 20 is biased by a spring so that it is at rest in its outermost position. When lowering the plunger 6 with the detection means 16, the button 20 is pressed inwards, so that it rests with its outer periphery on the inner surface of the insert 17. In the vote of the detection means 16 with the insert 17 is taken to ensure that the center of the ball of the probe 20 is within the opening of the insert 17, so that the ball can enter into the bore, the circumference of the ball of the probe 20 but safe rests against the inner surface of the insert 17. In other embodiments, another operating principle, such as an optical, magnetic or capacitive sensor can be used.

Im Inneren des Erfassungsmittels 16 ist eine bekannte Auswerteeinheit mit einer Genauigkeit, die mindestens 0,001 mm beträgt, vorgesehen. Das Erfassungsmittel 16 ist mit der Maschinensteuerungsvorrichtung 21 über eine Übertragungsstrecke 22, in dieser Ausführungsform einer Funkstrecke, verbunden. Über diese Funkstrecke wird das Signal, in das die Auslenkung des Tasters 20 durch die Auswerteeinheit umgewandelt wurde, übertragen.Inside the detection means 16, a known evaluation unit with an accuracy of at least 0.001 mm is provided. The detection means 16 is connected to the machine control device 21 via a transmission link 22, in this embodiment a radio link. About these Radio link, the signal in which the deflection of the probe 20 has been converted by the evaluation unit, transmitted.

Die übertragungsstrecke 22 als eine Funkstrecke benötigt keine Kabelverbindung und ist somit für ein automatisches Einwechseln der Erfassungseinrichtung 19 geeignet. In einer alternativen Ausführungsform kann die Übertragungsstrecke 22 auch durch eine Kabelverbindung gebildet werden, das was eine kostengünstige, Platz sparende Möglichkeit bei einem zumindest teilweise manuellen Vorgang ist, ein automatisches Einwechseln aber erschwert.The transmission link 22 as a radio link requires no cable connection and is thus suitable for automatic replacement of the detection device 19. In an alternative embodiment, the transmission link 22 may also be formed by a cable connection, which is a cost-effective, space-saving option in an at least partially manual operation, but makes automatic replacement difficult.

Die untere Werkzeugaufnahme 4 ist mit Hilfe von nicht gezeigten Linearlagern parallel zur X-Achse und Y-Achse verschiebbar gelagert. Mit Hilfe jeweils eines Linearantriebs wird die untere Werkzeugaufnahme 4 parallel zur X-Achse oder Y-Achse bewegt. die Linearantriebe werden von der Maschinensteuerungsvorrichtung 21 angesteuert. Die Linearantriebe werden in dieser Ausführungsform aus einem elektrischen Schrittmotor und einem Spindelgetriebe gebildet, die so abgestimmt sind, dass die entsprechende Genauigkeit erreicht werden kann.The lower tool holder 4 is supported by means of linear bearings, not shown, displaceable parallel to the X-axis and Y-axis. With the help of a respective linear drive, the lower tool holder 4 is moved parallel to the X-axis or Y-axis. the linear drives are controlled by the machine control device 21. The linear drives are formed in this embodiment of an electric stepper motor and a spindle gear, which are tuned so that the corresponding accuracy can be achieved.

In alternativen Ausführungsformen kann die Umsetzung der Drehbewegung des Motors in eine Linearbewegung durch Keile oder Exzenter erfolgen.In alternative embodiments, the implementation of the rotational movement of the motor can be made into a linear movement by wedges or eccentrics.

Für die Feststellung der unteren Werkzeugaufnahme 4 sind nicht gezeigte Feststellmittel vorgesehen. Diese verhindern eine Verlagerung des unteren Werkzeugaufnahme 4.For the determination of the lower tool holder 4 not shown locking means are provided. These prevent a displacement of the lower tool holder. 4

Im Betrieb wird, wie in Fig. 4 gezeigt, das Erfassungsmittel 16 mit Hilfe des zweiten Drehantriebs 25 des Stößels 6 genau in eine Richtung, die parallel zur X-Achse ist, gedreht, d.h. der Taster 20 steht in eine Richtung, die parallel zur X-Achse ist (Position A), und die Auslenkung des Tasters 20 erfasst. Die Auslenkung wird in ein entsprechendes Signal umgewandelt und an die Maschinensteuerungsvorrichtung 21 über die Übertragungsstrecke 22 übertragen. Anschließend wird das Erfassungsmittel 16 wiederum durch den zweiten Drehantrieb 25 des Stößels 6 und den Stößel 6 in eine erste Richtung um 180° gedreht, so dass der Taster 20 des Erfassungsmittels 16 in die entgegengesetzte Richtung parallel zur X-Achse steht (Position B), und die Auslenkung des Tasters 20 wird erfasst, in das entsprechende Signal umgewandelt und über die Übertragungsstrecke 22 an die Maschinensteuerungsvorrichtung 21 übertragen. Danach wird das Erfassungsmittel 16 um genau 90°in eine zweite, entgegengesetzte Richtung gedreht, so dass der Taster 20 des Erfassungsmittels 16 parallel zur Y-Achse steht (Position C), der Versatz des Tasters 20 erfasst, in das zugehörige Signal umgewandelt, und an die Maschinensteuerungsvorrichtung 21 übertragen. Dann wird das Erfassungsmittel 16 wiederum um 180° in die erste Richtung gedreht, so dass der Taster 20 in die entgegengesetzte Richtung, parallel zur Y-Achse steht (Position D), und der Versatz des Tasters 20 erfasst, auch in das zugehörige Signal umgewandelt, und an die Maschinensteuerungsvorrichtung 21 übertragen.In operation, as in Fig. 4 shown, the detection means 16 by means of the second rotary drive 25 of the plunger 6 exactly in a direction which is parallel to the X-axis, rotated, ie the button 20 is in a direction which is parallel to the X-axis (position A), and detects the deflection of the probe 20. The Deflection is converted into a corresponding signal and transmitted to the machine control device 21 via the transmission path 22. Subsequently, the detection means 16 is again rotated by the second rotary drive 25 of the plunger 6 and the plunger 6 in a first direction by 180 °, so that the probe 20 of the detection means 16 in the opposite direction is parallel to the X-axis (position B), and the deflection of the probe 20 is detected, converted into the corresponding signal and transmitted via the transmission path 22 to the machine control device 21. Thereafter, the detection means 16 is rotated by exactly 90 ° in a second, opposite direction, so that the probe 20 of the detection means 16 is parallel to the Y-axis (position C), detects the offset of the probe 20, converted into the associated signal, and transmitted to the engine control device 21. Then, the detecting means 16 is again rotated by 180 ° in the first direction, so that the probe 20 is in the opposite direction, parallel to the Y-axis (position D), and detects the offset of the probe 20, also converted into the associated signal , and transmitted to the engine control device 21.

In der Maschinensteuerungsvorrichtung 21 wird aus den übertragenen Signalen des Erfassungsmittels 16 ermittelt, welche Lage das Erfassungsmittel 16 in X-Richtung und Y-Richtung zu dem Einsatz 17 hat, also welchen Versatz das Erfassungsmittel 16 zu dem Einsatz 17 hat, was den Versatz der Achsen des Erfassungsmittels 16, somit der Achse der oberen Werkzeugaufnahme, des Stößels 6, zu der Achse des Einsatzes 17, also der unteren Werkzeugaufnahme 4 darstellt. Bei einer optimalen Einstellung ist die Auslenkung des Tasters 20 in den beiden entgegen gesetzten Richtungen in einer Achse identisch.In the machine control device 21, it is determined from the transmitted signals of the detecting means 16 which position the detecting means 16 has in the X direction and Y direction to the insert 17, that is, which offset the detecting means 16 has to the insert 17, which is the offset of the axes of the detection means 16, thus the axis of the upper tool holder, the plunger 6, to the axis of the insert 17, so the lower tool holder 4 represents. With an optimum setting, the deflection of the probe 20 in the two opposite directions in one axis is identical.

Aus diesen ermittelten Werten werden durch Maschinensteuerungsvorrichtung 21 die Korrekturwerte ermittelt und in Signale für die Linearantriebe umgewandelt. Diese Signale werden über Signalleitungen 24 an die Aktuatoren, die Linearantriebe übergeben und nach dem Lösen der Feststellmittel durch die Maschinensteuerungsvorrichtung 21 werden die Linearantriebe aktiviert. Nach der Justage werden die Feststellmittel durch die Maschinensteuerungsvorrichtung 21 wieder festgestellt.From these determined values, the correction values are determined by machine control device 21 and converted into signals for converted the linear drives. These signals are transmitted via signal lines 24 to the actuators, the linear drives and after the release of the locking means by the machine control device 21, the linear actuators are activated. After the adjustment, the locking means are detected by the engine control device 21 again.

Nach der Justage wird mit Hilfe des gleichen Verfahrens überprüft, wie groß ein verbleibender Versatz ist und bei Überschreitung eines festgelegten Grenzwerts das Zentrieren wiederholt.After the adjustment, it is checked by means of the same method how large a remaining offset is and, if a defined limit value is exceeded, the centering is repeated.

In alternativen Ausführungsformen können einzelne Merkmale verändert werden Statt dem Anordnen des Erfassungsmittels 16 in dem Stößel 6 kann das Erfassungsmittel 16 auch in der unteren Werkzeugaufnahme 4 aufgenommen werden und der Einsatz 17 so gestaltet sein, dass er durch den Stößel 6 aufgenommen wird. Durch die Anordnung des Erfassungsmittels 16 und des Einsatzes 17 direkt in die Werkzeugaufnahmen 4, 6 wird der Versatz direkt erfasst.In alternative embodiments, individual features may be altered. Instead of locating the detection means 16 in the plunger 6, the detection means 16 may also be received in the lower tool receptacle 4 and the insert 17 designed to be received by the plunger 6. The arrangement of the detection means 16 and the insert 17 directly into the tool holders 4, 6, the offset is detected directly.

Statt einer Erfassungsvorrichtung 16 mit einem Taster 20 kann die Erfassungsvorrichtung 16 auch mehrere, z.B. zwei oder vier Taster 20 aufweisen. Dadurch wird der Zentriervorgang verkürzt, da die Erfassung mehrere Auslenkungen der Taster 20 gleichzeitig erfolgen kann. Die Erfassung des Versatzes der Achsen über die Auslenkung der Taster 20 ist ein genaues einfaches Verfahren.Instead of a detection device 16 with a push-button 20, the detection device 16 may also comprise several, e.g. have two or four buttons 20. As a result, the centering process is shortened, since the detection of multiple deflections of the probe 20 can take place simultaneously. The detection of the offset of the axes via the deflection of the probe 20 is an accurate simple procedure.

Die Erfassungsvorrichtung 16 ist in einer alternativen Ausführungsform in einem Werkzeug zum Erfassen eines Maßes in Z-Richtung, parallel zu einer vertikalen Achse, vorgesehen. Das Gegenstück der Erfassungsvorrichtung 16 weist dementsprechend das andere Teil des Werkzeugs auf.The detection device 16 is provided in an alternative embodiment in a tool for detecting a dimension in the Z-direction, parallel to a vertical axis. The counterpart of the detection device 16 accordingly has the other part of the tool.

In einer weiteren Ausführungsform, die aber von den Ansprüchen nicht geschützt ist, ist statt des Erfassungsmittels 16, das Taster 20 aufweist, ein Kamerasystem vorgesehen. Dieses Kamerasystem ist an dem oberen Innenseite des C-Rahmens 2 angeordnet und auf die untere Werkzeugaufnahme 4 gerichtet. Über ein Bildauswertungsverfahren wird die momentane Lage der unteren Werkzeugaufnahme 4 zu einer optimalen Lage ermittelt, und die Lage der unteren Werkzeugaufnahme 4 korrigiert. Hierbei können zur Mittelachse des Werkzeugs punktsymmetrische Werkzeuge in der unteren Werkzeugaufnahme 4 verbleiben.In a further embodiment, which is not protected by the claims, a camera system is provided instead of the detection means 16, the button 20 has. This camera system is arranged on the upper inside of the C-frame 2 and directed to the lower tool holder 4. Via an image evaluation method, the current position of the lower tool holder 4 is determined to an optimum position, and corrects the position of the lower tool holder 4. In this case, point-symmetrical tools can remain in the lower tool holder 4 to the central axis of the tool.

Anstatt der Korrektur der Lage der unteren Werkzeugaufnahme 4 ist alternativ auch die Korrektur der Lage des Stößels 6 möglich.Instead of correcting the position of the lower tool holder 4, the correction of the position of the plunger 6 is alternatively possible.

Optional ist die Einrichtung 19 zum automatischen Zentrieren mit einem Mittel zur Überprüfung der Bearbeitungsqualität versehen. Die Einrichtung 19 weist ein Kamerasystem auf. Damit wird das Vorhandensein von sehr dünnen Stegen (< 0,2 mm) im gestanzten Blech überprüft. Bei einem Fehlen dieser dünnen Stege wird eine Justagevorgang ausgelöst. Statt den dünnen Stegen können auch andere Produktmerkmale als Indikatoren für die Genauigkeit verwendet werden.Optionally, the automatic centering device 19 is provided with a machining quality checking means. The device 19 has a camera system. This verifies the presence of very thin webs (<0.2 mm) in the stamped sheet. In the absence of these thin webs an adjustment process is triggered. Instead of the thin webs, other product features can also be used as indicators of accuracy.

Alternativ kann der Justagevorgang auch nach Ablauf einer vorbestimmten Zeit, oder manuell ausgelöst werden.Alternatively, the adjustment process can be triggered even after a predetermined time, or manually.

Claims (10)

  1. Device (19) for automatically centring the tools of a punching machine (1), comprising a detection means (16) for detecting a displacement, in a X-direction and an Y-direction, between an upper tool holder (6) and a lower tool holder (4); a controller device (21) and at least one actuator (23),
    characterized in that
    the detection means (16) is arrangeable in the lower or in the upper tool holder (4, 6) of the punching machine (1), and
    that the detection means (16) comprises at least one sensor element developed as to be a calliper (20).
  2. Device (19) according to claim 1,
    characterized in that
    the detection means (16) is mounted in a tool for measuring a dimension in Z-direction.
  3. Device (19) according to any of the preceding claims,
    characterized in that
    the actuator (23) for displacing the lower or the upper tool holder (6) in X-direction and/or Y-direction is provided and it is driven by the controller device (21).
  4. Device (19) according to claim 3,
    characterized in that
    devices for automatically locking the displaceable tool holders (4, 6) are provided.
  5. Device (19) according to any of the preceding claims,
    characterized in that
    means for examining the process quality are provided.
  6. Punching machine (1) with a device (19) according to any of the preceding claims.
  7. Punching machine (1) according to claim 6,
    characterized in that
    the controller device is integrated into the machine controller device (21).
  8. Method for automatically centring the tool holders (4, 6) of a punching machine (1) with the device (19) according to any of claims 1 to 5, consisting of the steps:
    - detecting the displacement in X-direction,
    - detecting the displacement in Y-direction,
    - ascertaining the correction values,
    - output of the necessary amount and direction of the correction movement to the actuators (23) of the X-direction and the Y-direction,
    - checking the displacement in X-direction and Y-direction and repeating of the process when a limit value is exceeded,
    characterized in that
    the displacement between the upper and lower tool holder (4, 6) in X-direction and Y-direction is detected and transmitted by following steps:
    - detecting and transmitting a deflection of a calliper (20) of the detection means (16) by a contact with an inner surface of an insert (17) in the tool holder (4, 6) opposite to the detection means (16),
    - turning the tool holder (4, 6) with the detection means (16) about 180°,
    - detecting and transmitting of a deflection of a calliper (20) of the detection means (16), by a contact with an inner surface of an insert (17) in the tool holder (4, 6) opposite to the detection means (16).
  9. Method according to claim 8,
    characterized in that
    the automatic centring is conducted after a predetermined time interval.
  10. Method according to claim 8,
    characterized in that
    the automatic centring is caused by a signal of the means for examining the process quality.
EP08016387A 2008-09-17 2008-09-17 Device and method for automatically centring die holders of a stamping machine Not-in-force EP2165784B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT08016387T ATE512734T1 (en) 2008-09-17 2008-09-17 DEVICE AND METHOD FOR AUTOMATICALLY CENTERING THE TOOL HOLDER OF A PUNCHING MACHINE
EP08016387A EP2165784B1 (en) 2008-09-17 2008-09-17 Device and method for automatically centring die holders of a stamping machine
JP2009206602A JP5436107B2 (en) 2008-09-17 2009-09-08 Apparatus for automatically centering a tool for a punching machine, punching machine comprising the apparatus and method for automatically centering a tool receiving part of a punching machine comprising the apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08016387A EP2165784B1 (en) 2008-09-17 2008-09-17 Device and method for automatically centring die holders of a stamping machine

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EP2165784A1 EP2165784A1 (en) 2010-03-24
EP2165784B1 true EP2165784B1 (en) 2011-06-15

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WO2016053377A1 (en) * 2014-09-30 2016-04-07 Apple Inc. Versatile dynamic stamping/restriking tool
US9981302B2 (en) 2014-09-30 2018-05-29 Apple Inc. Versatile dynamic stamping/restriking tool
EP3515627B1 (en) 2016-09-26 2020-09-09 Trumpf Werkzeugmaschinen GmbH + Co. KG Machine tool and method for machining planar workpieces
DE102016120142A1 (en) 2016-10-21 2018-04-26 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Machine tool and method for processing plate-shaped workpieces
FR3065659B1 (en) * 2017-04-28 2019-06-21 Peugeot Citroen Automobiles Sa ADJUSTING APPARATUS AND METHOD OF ADJUSTING THE POSITION OF A PUNCH HOLDER ON A BINDING TOOL.
CN114029570B (en) * 2021-10-30 2024-01-12 深圳恒佳精密模具注塑有限公司 New generation digital precision die manufacturing equipment

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JPS57115925A (en) * 1981-01-08 1982-07-19 Toshiba Corp Centering device
DE3420512A1 (en) * 1984-06-01 1985-12-05 Fried. Krupp Gmbh, 4300 Essen Method for positioning metal parts which enclose one another with small gap widths between them
JPH0195831A (en) * 1987-10-07 1989-04-13 Nikka Eng Kk Center punching device
JPH046322U (en) * 1990-05-09 1992-01-21
JPH0570726U (en) * 1992-02-24 1993-09-24 株式会社小松製作所 Turret punch press die centering device
JPH07112225A (en) * 1993-10-15 1995-05-02 Amada Co Ltd Punching work device
JP4355403B2 (en) * 1999-08-30 2009-11-04 株式会社アマダエンジニアリングセンター Punch press

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JP5436107B2 (en) 2014-03-05
ATE512734T1 (en) 2011-07-15
JP2010069534A (en) 2010-04-02

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