EP2184118B1 - Stepped holding down clamp and method of removing sheet metal parts from punching machines - Google Patents
Stepped holding down clamp and method of removing sheet metal parts from punching machines Download PDFInfo
- Publication number
- EP2184118B1 EP2184118B1 EP08019519A EP08019519A EP2184118B1 EP 2184118 B1 EP2184118 B1 EP 2184118B1 EP 08019519 A EP08019519 A EP 08019519A EP 08019519 A EP08019519 A EP 08019519A EP 2184118 B1 EP2184118 B1 EP 2184118B1
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- EP
- European Patent Office
- Prior art keywords
- holding
- sheet metal
- punching
- down clamp
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004080 punching Methods 0.000 title claims abstract description 49
- 239000002184 metal Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000009434 installation Methods 0.000 claims description 2
- 210000000078 claw Anatomy 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/003—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass in punching machines or punching tools
- B21D45/006—Stripping-off devices
-
- 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
- B21D28/12—Punching using rotatable carriers
-
- 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
- B21D28/24—Perforating, i.e. punching holes
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
- B21D28/265—Perforating, i.e. punching holes in sheets or flat parts with relative movement of sheet and tools enabling the punching of holes in predetermined locations of the sheet, e.g. holes punching with template
-
- 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/10—Combined ejecting and stripping-off devices
Definitions
- the invention relates to a remote hold-down for punching machines according to the preamble of claim 1 and a method for discharging sheet metal parts from punching machines using the remote hold-down according to the preamble of claim.
- part flaps or rigid chutes located in the machine table. After a separation operation of the sheet metal part, the position of which is on the machine table so that it is above the part flap or the rigid chute after the separation process, slide on the part flap or the chute in corresponding receptacle. Smaller parts that are not above the partial flap or rigid chute can not be removed in this way.
- the machine table then moves further back until the center of gravity of the separated sheet metal part, which is not moving along, lies in front of the front edge of the machine table.
- the tool shell with the stamp is moved back to the top dead center at this time, and thereby lifts the hold-down.
- the separated sheet metal part is free, tilts off by gravity, and thus can be discharged to the front over a rigid chute.
- this process is not reliable, since the separated sheet metal part is not fixed prior to clamping by the hold-down during the movement of the machine table and thus can slip.
- the process is also time-consuming due to the many individual steps.
- Patent Abstracts of Japan JP 2004283868 shows a punching tool with a tool shell with a scraper, which has a first surface and a second surface, which are not in a plane, and a tool lower part.
- the claimed objects and methods offer by clamping only the punched-sheet metal parts the ability to define the sheet metal parts defined a Ausschleusposition.
- Fig. 1a is a plan view of a remote hold-down 1.
- the hold-down consists of a base body 2, which has a circular shape.
- an opening 3 is provided, through which a stamp described later can pass.
- the opening 3 has a contour 4, which is rectangular with two short and two long sides, and is arranged centrally in the base body 2.
- two pins 6 are provided opposite, which engage in a corresponding receptacle in the punching machine described later, in order to prevent twisting of the hold-1.
- first edge 7 which is formed by the intersection of a first surface 8 and a connecting surface 9
- second edge 10 which is formed by the intersection of the connecting surface 9 and a plane in which a second surface 11 is formed
- the first edge 7 and the second edge 10 are congruent in the direction of a central axis 12 of the hold-down and the first plane and the second plane are connected by the connecting surface 9.
- the connecting surface 9 when the connecting surface 9 is not arranged parallel to the axis 12, but, for example, for manufacturing reasons, a Angle with the axis 12, the edge 7 and the edge 10 in the direction of the central axis 12 may not be congruent.
- the connecting surface 9 is bounded by the first edge 7 and the second edge 10 and extends in the region of the opening 3 along the contour 4 of the opening 3 on the side on which the first surface 8 is arranged adjacent to the opening 3. Outside the region of the opening 3, the connecting surface 9 extends in the direction of the outer circumferential surface 5, wherein the connecting surface 9 does not extend further in the direction in which the second surface 11 is arranged.
- the mounting position of the remote hold-down 1 is such that the first surface 8 and the second surface 11 come to lie down, and thus are arranged on a bottom 39 of the hold-1.
- the first plane in which the first surface 8 lies is different from the second plane in which the second surface 11 lies.
- the first and the second plane are parallel to each other and the first surface 8 is in the installed position about 0.5 mm to 1 mm lower, that is closer to the machine table, arranged as the second level eleventh
- Fig. 2 shows a punching tool 13, comprising a tool upper part 14 with an integrated remote hold-down 1 in an embodiment other than in Fig. 1a and 1b , and a tool lower part 15.
- the installation position of the upper tool part 14 in the punching machine is such that a punch shaft 16 points upwards, and the hold-down device 1 is oriented downwards.
- the tool upper part 14 has a punch 17.
- the punch 17 is connected via a fastening device 19 with the punch shaft 16.
- the punch 17 has a certain contour which corresponds to the shape of the desired Punching corresponds.
- the contour of an opening 18 in the remote hold-down 1, in contrast to the opening 3, in the Fig. 1a and Fig. 1b embodiment shown, is not arranged centrally in the base body, corresponds to the contour of the punch 17 or is larger than the contour of the punch 17.
- the hold-down device 1 is mounted axially displaceable in the direction of the axis 12.
- the fastening device 19 has a resilient element 38 which urges the hold-down 1 in a direction parallel to the axis 12, away from the punch shaft 16.
- the lower tool part 15 includes a die 20 which has an opening whose contour corresponds to the contour of the punch 17. However, the dimensions of the contour of the opening are larger by a few tenths of a millimeter than the dimensions of the contour of the punch 17 to produce a required kerf.
- the central axis 12 corresponds to the axis 12 of the upper tool part.
- the offset hold-down can also be multi-part in an alternative embodiment, with one part having the first surface 8 and another part having the second surface 11.
- the remote hold-down is either made of metal, or plastic, for example, made of the elastic plastic Eladur.
- a punching machine 21 for use of the remote hold 1, and for carrying out a method for discharging sheet metal parts is shown.
- An integral part of the punching machine 21 is a C-frame 22.
- the C-frame 22 is made of a torsionally rigid welded steel construction.
- a hydraulic unit 23 is provided, with which a plunger 25 is hydraulically driven.
- a lower tool holder 24 for receiving the lower tool part 15 of the punching tool 13 is provided on the lower inside of the C-frame 22 .
- the tool lower part 15 is rotatable about a first rotary drive 26 by 360 ° and lockable in any desired angular position.
- the plunger 25 On the upper inside of the C-frame 22, the plunger 25 is provided.
- the plunger 25 receives the tool upper part 14 of the punching tool 13 via the stamp shank 16 in a form-fitting and clearance-free manner.
- the plunger 25 is also rotatable by 360 ° and can be found in any angular position.
- For a second rotary actuator 27 is present.
- a drive device 28 is provided for the remote hold-down 1.
- the drive device 28 is designed as a single-acting hydraulic cylinder.
- the rotary actuators 26, 27, and the drive device 28 for the hold-1 are controlled by a machine control device, not shown, which is provided in a separate cabinet. Furthermore, a plunger control, as well as all linear drives for moving a sheet 29 and actuators for special functions, such as the Abund folding up a partial flap 30, controlled by the machine control device.
- the control device 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.
- the hold-down device 1 is mounted in a guide, not shown, and is moved by the drive device 28 independently of the plunger 25 down. The upward movement of the hold-down 1 is effected by the plunger 25.
- the control device controls the hold-down 1 so that is pressed with a defined force on the plate 29, and the sheet is clamped between the hold-down and the lower tool part 5.
- a machine table 31 On the lower inside of the C-frame 22, a machine table 31 is arranged, which has a transverse rail 32 with a linear magazine 33. On the cross rail 32 clamping claws 34 are arranged for holding the sheet 29. The clamping claws 34 can be fastened at suitable locations on the transverse rail 32. The clamping claws 34 can be offset so that the sheet 29 is held securely, but the sheet 29 is not gripped on a surface to be machined. In the linear magazine 33 receptacles for several punching tools 13 are available. Before half of the lower tool holder 24, the parts flap 30 is arranged centrally.
- the machine table 31 moves in a Y-direction together with the cross rail 32 to which the Sparmpratzen 34 are fixed, with which the sheet 29 is held in a defined position, and the cross rail 32 moves in the X direction in the programmed Position, wherein the sheet 29 slides over the machine table 31. Then, a punching stroke is performed by the plunger 25. Following this, the next punching position is approached with the same principle.
- the punching tools 13 are automatically changed, controlled by the machine control device, changed.
- the cross rail 32 driven by a linear drive, not shown, moves into a position in an X direction, so that the X position of the tool 13 to be loaded corresponds to the X position of the lower tool holder 24.
- the cross rail 32 then moves together with the machine table 31, driven by a further linear drive, into a position in the Y direction in which the axis 12 of the lower tool part 15 and the upper tool part 14 coincide with a central axis of the lower tool holder 24 and the plunger 25 , so that the lower tool part 15 can be received in the lower tool holder 24, and the upper tool part 14 can be received in the plunger 25. If there is a tool in the plunger 25 and the lower tool holder 24, this is previously released to a free space in the linear magazine 33.
- Fig. 4a to 4c is a method for discharging sheet metal parts, explained here using the example of a residual strip of the sheet 29. It is not mandatory that notches 37 are present.
- Fig. 4a shows the separation process in the discharge of a residual strip 35.
- the remaining strip 35 is held at least by two, here three, clamping claws 34 and positioned by the movement of the cross rail 32 in a 1st step so that a portion 36 of the residual strip 35 with a maximum ausschleusbaren Length is separated in the third step, ie the desired separation point on the remaining strip 35 is positioned in the axis 12 of the punch 13.
- the residual strip 35 is positioned so that the desired separation point on the remaining strip 35 is below the punch 17.
- the tool upper part 14 and the lower tool part 15 are rotated by the first and second rotary drive 26, 27 so that the first surface 8 of the stepped down holder 1 does not lie above the remaining strip 35, but only over the portion 36 to be separated located.
- the stepped down holder 1 is then shut down in a third step by the drive device 28, so that the portion 36 is clamped by the first surface 8 of the stepped down holder 1 and the lower tool part 15.
- the residual strip 35 on the opposite side of the opening 3, however, is not clamped because the second surface 11 is higher than the first surface 8.
- the tool upper part 14 is moved by the plunger 25 at least as far down until the punch 17 has punched the remaining strip 35.
- this step is carried out only by the shutdown of the plunger 25 With the shutdown of the upper tool part 14, the portion 36 is separated from the remaining strip 35.
- a lower position of the stepped down holder 1 and the tool top 14 is maintained so that the portion 36 remains clamped.
- the section 36 is retained further, but the residual strip 35 is not clamped due to the higher-lying second surface.
- an upward movement of the plunger would also cause an upward movement of the blank holder 1, which is why the tool upper part 14 remains in a lower position in which the remote hold-down 1 is not moved up, and the stepped down holder. 1 is pressed down by the drive device 28 of the blank holder 1.
- Fig. 4c shows an executed fifth step of the method in which the machine table is moved with the cross rail to the rear.
- the punching tool 13 remains in the same position as in FIG Fig. 4a shown.
- the clamping claws 34 are moved together with the cross rail 32 and the machine table 31 to the rear in the Y direction ( Fig. 3 ), in this illustration upward, proceed.
- the remaining strip 35 is also moved backwards, and a movement of the section 36 in the next method step thus does not lead to a collision.
- the remaining strip can also be moved in the X direction ( Fig. 3 ). It can be seen here that the section 36 does not lie above the partial flap 30, that is, it can not yet be discharged.
- the Fig. 4b shows the section 36 after an optional method step 5a, in which the punching tool 13, the upper tool part 14 and the lower tool part 15, were rotated.
- the section 36 now lies almost completely over the partial flap 30.
- the center of gravity of the section 36 which can be assumed to be mid-lying in section 36, lies centrally above the partial flap 30. No region of the section 36 projects beyond the partial flap 30. If the section 36 or a sheet metal part to be ejected already over the flap or another suitable Ausschleusposition, this step can be omitted.
- the upper tool part 14, and thus also the integrated offset downholder 1 is moved up again, or the moved down by the drive device 28 down hold-down 1 by the plunger 25 taken up.
- the drive device 28 down hold-down 1 by the plunger 25 taken up.
- the component can be oriented by turning in method step 5a so that the same sheet metal parts, which however are manufactured in different orientations from the sheet 29, are brought into the same orientation.
- a simple automatic removal system can be used because the sheet metal parts to be rejected are always in the same position in the same orientation.
- the machine table 31 For discharging of larger sheet metal parts, the machine table 31 is moved so far to the rear in the fifth method step that the sheet metal part to be rejected lies so far in front of the machine table 31 that it tilts on its own.
- a rigid chute is mounted, over which slides the sheet metal part after lifting the remote hold down 1.
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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)
Abstract
Description
Die Erfindung betrifft einen abgesetzten Niederhalter für Stanzmaschinen gemäss dem Oberbegriff des Anspruchs 1 und ein Verfahren zum Ausschleusen von Blechteilen aus Stanzmaschinen unter Verwendung des abgesetzten Niederhalters gemäss dem Oberbegriff des Anspruchs 9.The invention relates to a remote hold-down for punching machines according to the preamble of
Solch einem Niederhalter ist in der
Größere Blechteile, die durch Stanzen in einer Stanzmaschine hergestellt werden, können nur aufwändig automatisiert aus der Stanzmaschine entnommen-werden. Der Einsatz von Handlingsystemen mit Greifern wird zum Einen durch die verschiedenen Größen der Teile, und zum Anderen durch verschiedene Orientierungen selbst bei gleichen Teilen erschwert. Eine Möglichkeit die Teile aus der Maschine zu entladen, ist der Einsatz von Handlingsystemen mit Sauggreifern. Der Einsatz dieser Greifer ist jedoch bei Blechteilen mit Ausstanzungen problematisch.Larger sheet-metal parts, which are produced by punching in a punching machine, can only be removed from the punching machine in a complex and automated manner. The use of handling systems with grippers is made difficult on the one hand by the different sizes of the parts, and on the other hand by different orientations, even with the same parts. One way to unload the parts from the machine is the use of handling systems with suction pads. However, the use of these grippers is problematic in sheet metal parts with punched.
Kleinere Blechteile werden nach Möglichkeit über Teileklappen oder starre Rutschen, die sich in dem Maschinentisch befinden, ausgeschleust. Nach einem Abtrennvorgang des Blechteils, dessen Lage auf dem Maschinentisch so ist, dass es sich nach dem Abtrennvorgang oberhalb der Teileklappe oder der starren Rutsche befindet, rutschen auf der Teileklappe oder der Rutsche in entsprechende Auffangbehälter. Kleinere Teile, die nicht oberhalb der Teileklappe oder starren Rutsche liegen, können auf diese Weise nicht ausgeschleust werden.If possible, smaller sheet metal parts will be ejected via part flaps or rigid chutes located in the machine table. After a separation operation of the sheet metal part, the position of which is on the machine table so that it is above the part flap or the rigid chute after the separation process, slide on the part flap or the chute in corresponding receptacle. Smaller parts that are not above the partial flap or rigid chute can not be removed in this way.
Größere Blechteile können durch den folgenden Vorgang ausgeschleust werden. Mit einem die Bearbeitung des Blechteils abschließenden Stanzhub wird das Blechteil von dem Restblech getrennt und bleibt auf dem Maschinentisch liegen. Nach dem Stanzhub verbleibt das Werkzeugoberteil mit dem Stempel in seinem unteren Totpunkt. Der Maschinentisch mit dem über Spannpratzen und eine Querschiene daran festgehaltenem Restblech wird nur soweit nach hinten gefahren, bis sich das Restblech nicht mehr unterhalb eines Niederhalters befindet. Der Stempel in seinem unteren Totpunkt übernimmt hierbei die Funktion eines Anschlags, so dass das abgetrennte Blechteil nicht mit dem Maschinentisch nach hinten bewegt wird. Anschließend fährt der Niederhalter nach unten und klemmt das Blechteil zwischen dem Niederhalter und dem Werkzeugunterteil ein. Der Maschinentisch fährt dann weiter nach hinten bis der Schwerpunkt des nicht mitbewegten abgetrennten Blechteils vor der Vorderkante des Maschinentischs liegt. Das Werkzeugoberteil mit dem Stempel wird zu diesem Zeitpunkt wieder in den oberen Totpunkt gefahren, und hebt dabei auch den Niederhalter an. Dadurch wird das abgetrennte Blechteil frei, kippt durch die Schwerkraft ab, und kann somit nach vorne über eine starre Rutsche ausgeschleust werden. Dieser Vorgang ist aber nicht prozesssicher, da das abgetrennte Blechteil vor dem Klemmen durch den Niederhalter bei der Bewegung des Maschinentischs nicht fixiert ist und somit verrutschen kann. Der Ablauf ist außerdem auf Grund der vielen Einzelschritte zeitaufwändig.Larger sheet metal parts can be removed by the following procedure. With a final machining stroke of the sheet metal part stamping the sheet metal part is separated from the residual sheet and stays lying on the machine table. After the punching stroke, the upper tool part remains with the punch in its bottom dead center. The machine table with the over clamp and a transverse rail held on it residual sheet is only as far back driven until the remaining sheet is no longer below a hold. The stamp in its bottom dead center assumes the function of a stop, so that the separated sheet metal part is not moved with the machine table to the rear. Subsequently, the hold-down moves down and clamps the sheet metal part between the hold-down and the lower tool part. The machine table then moves further back until the center of gravity of the separated sheet metal part, which is not moving along, lies in front of the front edge of the machine table. The tool shell with the stamp is moved back to the top dead center at this time, and thereby lifts the hold-down. As a result, the separated sheet metal part is free, tilts off by gravity, and thus can be discharged to the front over a rigid chute. However, this process is not reliable, since the separated sheet metal part is not fixed prior to clamping by the hold-down during the movement of the machine table and thus can slip. The process is also time-consuming due to the many individual steps.
Des Weiteren besteht das Problem, dass nach der Bearbeitung einer Blechtafel auf einer Stanzmaschine bei einer optimalen Materialausnutzung der Rest des in der Maschine verbleibenden Materials sehr klein ist. In günstigen Fällen bleibt durch eine solche "restgitterfreie" Bearbeitung nur noch ein Reststeifen, der durch die Spannpratzen festgehalten wird. Dieser Reststreifen ist automatisiert nur schwer prozesssicher zu entfernen, da er auf Grund seiner Länge nur schwer handhabbar ist. Bestehende Systeme haben sich nicht durchgesetzt, so dass die "restgitterfreie" Bearbeitung bei dem Entfernen des Reststreifens nicht unterstützt wird.Furthermore, there is the problem that after processing a metal sheet on a punching machine with an optimal material utilization, the rest of the remaining material in the machine material is very small. In favorable cases remains through such a "skeleton-free" processing only a residual stiffness, which is held by the clamping claws. This residual strip is difficult to remove automatically with high process reliability, as it is difficult to handle due to its length. Existing systems have not prevailed, so that the "skeleton-free" processing in the removal of the remaining strip is not supported.
Daraus ergibt sich das Problem, dass der Reststreifen manuell entfernt werden muss, was eine vollautomatische Bearbeitung verhindert, und daher ein großes Kostenpotential darstellen kann.This results in the problem that the residual strip must be removed manually, which prevents fully automatic processing, and therefore can represent a large cost potential.
Patent Abstracts of Japan
In der Patentschrift
Es ist die Aufgabe der vorliegenden Erfindung, einen Niederhalter und ein Verfahren zum automatisierten Ausschleusen von Blechteilen einer bestimmten Größe, und zum automatisierten Ausschleusen des Reststreifens, der nach einer restgitterfreien Bearbeitung in der Stanzmaschine verbleibt, zur Verfügung zu stellen.It is the object of the present invention to provide a hold-down device and a method for the automated removal of sheet metal parts of a certain size, and for the automated removal of the residual strip, which remains after a skeleton-free processing in the punching machine available.
Die Aufgabe wird durch einen Niederhalter mit den in Anspruch 1 beschriebenen Merkmalen und einem Verfahren gemäß Anspruch 9 gelöst. Weiterentwicklungen der Erfindung sind in den jeweilig abhängigen Ansprüchen beschrieben.The object is achieved by a hold-down device having the features described in
Die beanspruchten Gegenstände und Verfahren bieten durch Klemmen nur der freigestanzten Blechteile die Möglichkeit, die Blechteile definiert einer Ausschleusposition zuzuführen.The claimed objects and methods offer by clamping only the punched-sheet metal parts the ability to define the sheet metal parts defined a Ausschleusposition.
Die Erfindung wird unter Bezugnahme auf die beigefügten Zeichnungen erklärt.
- Fig. 1a
- ist eine Draufsicht auf einen abgesetzten Nieder- halter;
- Fig. 1b
- ist eine Seitenansicht des in
Fig. 3a dargestellten Niederhalters in einem Halbschnitt; - Fig. 2
- zeigt ein Stanzwerkzeug mit einem integrierten Nie- derhalter;
- Fig. 3
- stellt eine Stanzmaschine in perspektivischer An- sicht dar;
- Fig. 4a
- zeigt den Trennvorgang bei der Ausschleusung eines Reststreifens;
- Fig. 4b
- zeigt das Freifahren des auszuschleusenden Blechteils;
- Fig. 4c
- zeigt das auszuschleusende Blechteil in der Position über der Teileklappe.
- Fig. 1a
- is a plan view of a stepped down hold;
- Fig. 1b
- is a side view of the in
Fig. 3a shown in a half section; - Fig. 2
- shows a punching tool with an integrated lower holder;
- Fig. 3
- shows a punching machine in perspective view;
- Fig. 4a
- shows the separation process in the discharge of a residual strip;
- Fig. 4b
- shows the retraction of auszuschleusenden sheet metal part;
- Fig. 4c
- shows the auszuschleusende sheet metal part in the position above the parts flap.
Die Öffnung 3 weist eine Kontur 4 auf, die rechteckig mit zwei kurzen und zwei langen Seiten ausgebildet ist, und zentral in dem Grundkörper 2 angeordnet ist.The
An der äußeren Umfangsfläche 5 sind gegenüberliegend zwei Stifte 6 vorgesehen, die in jeweils eine entsprechende Aufnahme in der später beschriebenen Stanzmaschine eingreifen, um ein Verdrehen des Niederhalters 1 zu verhindern.On the outer
Als verdeckte Körperkante ist in
In einer alternativen Ausführungsform, wenn die Verbindungsfläche 9 bezüglich der Achse 12 nicht parallel angeordnet ist, sondern, beispielsweise aus fertigungstechnischen Gründen, einen Winkel mit der Achse 12 einschließt, können die Kante 7 und die Kante 10 in Richtung der Mittelachse 12 nicht deckungsgleich sein.In an alternative embodiment, when the connecting surface 9 is not arranged parallel to the
Die Verbindungsfläche 9 wird durch die erste Kante 7 und die zweite Kante 10 begrenzt und verläuft im Bereich der Öffnung 3 entlang der Kontur 4 der Öffnung 3 auf der Seite, auf der die erste Fläche 8 angenzend zur Öffnung 3 angeordnet ist. Außerhalb des Bereichs der Öffnung 3 verläuft die Verbindungsfläche 9 in Richtung der äußeren Umfangsfläche 5, wobei sich die Verbindungsfläche 9 nicht weiter in die Richtung erstreckt, in der die zweite Fläche 11 angeordnet ist.The connecting surface 9 is bounded by the
Die Einbaulage des abgesetzten Niederhalters 1 ist so, dass die erste Fläche 8 und die zweite Fläche 11 nach unten zu liegen kommen, und somit an einer Unterseite 39 des Niederhalters 1 angeordnet sind. Die erste Ebene, in der die erste Fläche 8 liegt, ist dabei verschieden von der zweiten Ebene, in der die zweite Fläche 11 liegt. Die erste und die zweite Ebene sind parallel zu einander und die erste Fläche 8 ist in Einbaulage ca. 0,5 mm bis 1 mm tiefer, also näher zum Maschinentisch hin, angeordnet als die zweite Ebene 11.The mounting position of the remote hold-
Die Einbaulage des Werkzeugoberteils 14 in der Stanzmaschine ist so, dass ein Stempelschaft 16 nach oben zeigt, und der Niederhalter 1 nach unten orientiert ist. Das Werkzeugoberteil 14 weist einen Stempel 17 auf. Der Stempel 17 ist über eine Befestigungseinrichtung 19 mit dem Stempelschaft 16 verbunden. Der Stempel 17 weist eine bestimmte Kontur auf, die der Form der gewünschten Ausstanzung entspricht. Die Kontur einer Öffnung 18 in dem abgesetzten Niederhalter 1, die im Gegensatz zu der Öffnung 3, der in den
Das Werkzeugunterteil 15 enthält eine Matrize 20, die eine Öffnung aufweist, deren Kontur der Kontur des Stempels 17 entspricht. Die Abmessungen der Kontur der Öffnung sind aber um wenige Zehntelmillimeter größer als die Abmessungen der Kontur des Stempels 17, um einen erforderlichen Schnittspalt zu erzeugen. Die Mittelachse 12 entspricht der Achse 12 des Werkzeugoberteils.The
Der abgesetzte Niederhalter kann in einer alternativen Ausführungsform auch mehrteilig sein, wobei ein Teil die erste Fläche 8 und ein anderer Teil die zweite Fläche 11 aufweist.The offset hold-down can also be multi-part in an alternative embodiment, with one part having the
Der abgesetzte Niederhalter ist entweder aus Metall, oder aus Kunststoff, beispielsweise aus dem elastischen Kunststoff Eladur, gebildet.The remote hold-down is either made of metal, or plastic, for example, made of the elastic plastic Eladur.
In
Am hinteren Ende des C-Rahmens 22 ist ein Hydraulikaggregat 23 vorgesehen, mit dem ein Stößel 25 hydraulisch angetrieben wird.At the rear end of the C-
Auf der unteren Innenseite des C-Rahmens 22 ist eine untere Werkzeugaufnahme 24 zum Aufnehmen des Werkzeugunterteils 15 des Stanzwerkzeugs 13 vorgesehen. Das Werkzeugunterteil 15 ist über einen ersten Drehantrieb 26 um 360° drehbar und in jeder beliebigen Winkellage feststellbar.On the lower inside of the C-
Auf der oberen Innenseite des C-Rahmens 22 ist der Stößel 25 vorgesehen. Der Stößel 25 nimmt das Werkzeugoberteil 14 des Stanzwerkzeugs 13 über den Stempelschaft 16 formschlüssig und spielfrei auf. Der Stößel 25 ist ebenfalls um 360° drehbar und kann in jeder beliebigen Winkellage festgestellt werden. Dafür ist ein zweiter Drehantrieb 27 vorhanden.On the upper inside of the C-
Weiterhin ist in dem C-Rahmen im Bereich des Stößels 25 eine Antriebsvorrichtung 28 für den abgesetzten Niederhalter 1 vorgesehen. Die Antriebsvorrichtung 28 ist als ein einfach wirkender Hydraulikzylinder ausgeführt.Furthermore, in the C-frame in the region of the
Die Drehantriebe 26, 27, sowie die Antriebsvorrichtung 28 für den Niederhalter 1 werden von einer nicht gezeigten Maschinensteuerungsvorrichtung gesteuert, die in einem separaten Schaltschrank vorgesehen ist. Weiterhin wird auch eine Stößelsteuerung, sowie sämtliche Linearantriebe zur Bewegung eines Blechs 29 und Aktuatoren für Sonderfunktionen, beispielsweise das Abund Hochklappen einer Teileklappe 30, durch die Maschinensteuerungsvorrichtung gesteuert. Die Steuerungsvorrichtung 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 abgespeichert.The
Der Niederhalter 1 ist in einer nicht gezeigten Führung gelagert und wird von der Antriebsvorrichtung 28 unabhängig von dem Stößel 25 nach unten bewegt. Die Aufwärtsbewegung des Niederhalters 1 erfolgt durch den Stößel 25. Die Steuerungsvorrichtung steuert den Niederhalter 1 so, dass mit einer definierten Kraft auf das Blech 29 gedrückt wird, und das Blech zwischen dem Niederhalter und dem Werkzeugunterteil 5 eingeklemmt wird.The hold-down
Auf der unteren Innenseite des C-Rahmens 22 ist ein Maschinentisch 31 angeordnet, der eine Querschiene 32 mit einem Linearmagazin 33 aufweist. An der Querschiene 32 sind Spannpratzen 34 zum Festhalten des Blechs 29 angeordnet. Die Spannpratzen 34 können an geeigneten Stellen auf der Querschiene 32 befestigt werden. Die Spannpratzen 34 können so versetzt werden, dass das Blech 29 sicher gehalten wird, aber das Blech 29 nicht an einer zu bearbeitenden Fläche gegriffen wird. In dem Linearmagazin 33 sind Aufnahmen für mehrere Stanzwerkzeuge 13 vorhanden. Vorderhalb derhalb der unteren Werkzeugaufnahme 24 ist die Teileklappe 30 zentral angeordnet.On the lower inside of the C-
Zum Stanzen fährt der Maschinentisch 31 in einer Y-Richtung gemeinsam mit der Querschiene 32, an der die Sparmpratzen 34 befestigt sind, mit denen das Blech 29 gehalten wird, in eine definierte Position, und die Querschiene 32 fährt in X-Richtung in die programmierte Position, wobei das Blech 29 über den Maschinentisch 31 gleitet. Dann wird von dem Stößel 25 ein Stanzhub durchgeführt. Im Anschluss daran wird mit demselben Prinzip die nächste Stanzposition angefahren.For punching the machine table 31 moves in a Y-direction together with the
Im Falle des integrierten abgesetzten Niederhalters 1, wie in
Die Stanzwerkzeuge 13 werden automatisch, durch die Maschinensteuerungsvorrichtung angesteuert, gewechselt. Dazu fährt die Querschiene 32, angetrieben von einem nicht gezeigten Linearantrieb, in eine Position in einer X-Richtung, so dass die X-Position des einzuwechselnden Werkzeugs 13 der X-Position der unteren Werkzeugaufnahme 24 entspricht. Die Querschiene 32 fährt dann gemeinsam mit dem Maschinentisch 31, von einem weiteren Linearantrieb angetrieben, in eine Position in der Y-Richtung, in der die Achse 12 des Werkzeugunterteils 15 und des Werkzeugoberteil 14 mit einer Mittelachse der unteren Werkzeugaufnahme 24 und dem Stößel 25 übereinstimmen, so dass das Werkzeugunterteil 15 in die untere Werkzeugaufnahme 24 aufgenommen werden kann, und das Werkzeugoberteil 14 in den Stößel 25 aufgenommen werden kann. Sofern in dem Stößel 25 und der unteren Werkzeugaufnahme 24 ein Werkzeug vorhanden ist, wird dieses vorher an einen freien Platz im Linearmagazin 33 abgegeben.The
In den
In einem zweiten Schritt des Verfahrens werden das Werkzeugoberteil 14 und das Werkzeugunterteil 15 durch den ersten und zweiten Drehantrieb 26, 27 so gedreht, dass die erste Fläche 8 des abgesetzten Niederhalters 1 nicht oberhalb des Reststreifens 35 liegt, sondern sich ausschließlich über dem abzutrennenden Abschnitt 36 befindet.In a second step of the method, the tool
Der abgesetzte Niederhalter 1 wird dann in einem dritten Schritt durch die Antriebsvorrichtung 28 heruntergefahren, so dass der Abschnitt 36 durch die erste Fläche 8 des abgesetzten Niederhalters 1 und das Werkzeugunterteil 15 eingeklemmt wird. Der Reststreifen 35 auf der gegenüberliegenden Seite der Öffnung 3 ist dagegen nicht geklemmt, da die zweite Fläche 11 höher als die erste Fläche 8 liegt. Des Weiteren wird in diesem Schritt das Werkzeugoberteil 14 durch den Stößel 25 mindestens so weit nach unten gefahren, bis der Stempel 17 den Reststreifen 35 durchstanzt hat. In der in
In einem vierten Schritt des Verfahrens wird eine untere Position des abgesetzten Niederhalters 1 und des Werkzeugoberteils 14 beibehalten, so dass der Abschnitt 36 geklemmt bleibt. Dadurch wird in der Ausführungsform mit dem integrierten Niederhalter 1, der durch das federnde Element 38 nach unten gedrängt wird, der Abschnitt 36 weiter festgehalten, der Reststreifen 35 ist auf Grund der höher liegenden zweiten Fläche jedoch nicht geklemmt. Im Falle des Niederhalters 1, der durch die Antriebsvorrichtung 28 nach unten gedrückt wird, würde ein Nach-Oben-Fahren des Stößels ebenfalls eine Aufwärtsbewegung des Niederhalters 1 verursachen, weshalb das Werkzeugoberteil 14 in einer unteren Position bleibt, in der der abgesetzte Niederhalter 1 nicht nach oben bewegt wird, und der abgesetzte Niederhalter 1 durch die Antriebsvorrichtung 28 des Niederhalters 1 nach unten gedrückt wird.In a fourth step of the method, a lower position of the stepped down
Das Stanzwerkzeug 13 bleibt in der selben Position, wie in
Die
Im 6. Verfahrensschritt wird das Werkzeugoberteil 14, und damit auch der integrierte abgesetzte Niederhalter 1 wieder nach oben bewegt, oder der durch die Antriebsvorrichtung 28 nach unten bewegte abgesetzte Niederhalter 1 durch den Stößel 25 nach oben mitgenommen. Durch das Aufheben der Klemmung wird der Abschnitt 36 nicht mehr gehalten und rutscht so über die nach unten geschwenkte Teileklappe 30 aus der Stanzmaschine.In the sixth method step, the
Alternativ zum Ausschleusen des Abschnitts 36 oder des auszuschleusenden Bauteils über die Teileklappe kann das Bauteil durch Drehen im Verfahrensschritt 5a so orientiert werden, dass gleiche Blechteile, die aber in verschiedenen Orientierungen aus dem Blech 29 gefertigt werden, in die selbe Orientierung gebracht werden. Somit kann ein einfaches automatisches Entnahmesystem verwendet werden, da die auszuschleusenden Blechteile immer an der selben Position in der selben Orientierung liegen.As an alternative to the removal of the
Zum Ausschleusen von größeren Blechteilen wird im 5. Verfahrensschritt der Maschinentisch 31 so weit nach hinten bewegt, dass das auszuschleusende Blechteil so weit vorderhalb des Maschinentischs 31 liegt, dass es von selbst abkippt. Am vorderen Ende des Maschinentischs 31 ist eine starre Rutsche angebracht, über die das Blechteil nach dem Anheben des abgesetzten Niederhalters 1 herunter rutscht.For discharging of larger sheet metal parts, the machine table 31 is moved so far to the rear in the fifth method step that the sheet metal part to be rejected lies so far in front of the machine table 31 that it tilts on its own. At the front end of the machine table 31, a rigid chute is mounted, over which slides the sheet metal part after lifting the remote hold down 1.
Claims (10)
- Holding-down clamp (1) for a punching tool (13), wherein the holding-down clamp (1) comprises a lower side (39) comprising at least a first area (8) and a second area (11), which are not located in one plane, the plane of the first area (8), i.e., the first plane, and the plane of the second area (11), i.e., the second plane, are connected with each other by a connecting area (9) and the holding-down clamp (1) comprises an orifice (18) for a going through of a stamp (17), characterized in that a first edge (7) extends between the first plane and the connecting area (9) in the region of the orifice (18) along the contour (4) of the orifice (18) on the side of the first area (8).
- Holding-down clamp (1) according to claim 1, characterized in that the first plane in which the first area (8) is located and the second plane in which the second area (11) is located are parallel and the first area (8) is low-lying in the punching tool (13) in installation position.
- Punching tool (13) comprising a lower tool part (15) and an upper tool part (14), having a holding-down clamp (1) according to claim 1 or 2, the holding-down clamp (1) comprising an axis (12).
- Punching tool (13) according to claim 3, characterized in that the upper tool part (14) comprises a stamp (17) being arranged in direction of the axis (12) above the orifice (18) and the contour of the orifice (18) corresponds at least to the contour of the stamp (17) or it is larger.
- Punching tool (13) according to any of the claims 3 or 4, characterized in that the holding-down clamp (1) comprises a resilient element (38) urging the holding-down clamp (1) away from a stamp shaft (16) in a direction parallel to the axis (12).
- Punching machine (21) with a punching tool (13) according to any of the claims 3 to 5.
- Punching machine (21) according to claim 6, characterized in that the punching machine (21) comprises a control device and a driving device (28) moving the holding-down clamp (1) downwards independently from the upper tool part (14) .
- Punching machine (21) according to any of the claims 6 or 7, characterized in that the punching machine (21) comprises a lower tool holder (24) with a first rotary drive (26) and an upper tool holder (25) with a second rotary drive (27) and a control device driving the first rotary drive (26) and the second rotary drive (27).
- Method for transferring outward of sheet metal parts from a punching machine (21), characterized in that the punching machine corresponds to any of the claims 6 to 8 and that the method comprises the following steps:- Step 1: Positioning of the sheet metal part (36) to be transferred outward such that the sheet metal part (36) is separated from a residual metal sheet (35);- Step 2: Aligning of at least the upper tool part (14) such that the first area (8) is not located above the residual metal sheet (35);- Step 3: Moving downwards of a holding-down clamp (1) until the sheet metal part to be transferred outward is clamped and moving downwards of the upper tool part (14) until the residual metal sheet (35) is punched through;- Step 4: Maintaining of a lower position of the holding-down clamp (1) such that the sheet metal part (36) keeps clamped;- Step 5: Transferring of a cross rail (32) and/or of a table (31) in a X-direction and/or a Y-direction;- Step 6: Moving upwards of the holding-down clamp (1).
- Method for removing sheet metal parts from a punching machine (21) according to claim 9, characterized in that the method comprises the following step after the step 5:- Step 5a: Rotating of the upper tool part (14) and the lower tool part (15) such that the sheet metal part (36) adopts a position for transferring outward or for collecting.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT08019519T ATE524252T1 (en) | 2008-11-07 | 2008-11-07 | REMOVED HOLD-OWN HOLDER AND METHOD FOR REMOVAL OF SHEET METAL PARTS FROM PUNCHING MACHINES |
PL08019519T PL2184118T3 (en) | 2008-11-07 | 2008-11-07 | Stepped holding down clamp and method of removing sheet metal parts from punching machines |
EP08019519A EP2184118B1 (en) | 2008-11-07 | 2008-11-07 | Stepped holding down clamp and method of removing sheet metal parts from punching machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08019519A EP2184118B1 (en) | 2008-11-07 | 2008-11-07 | Stepped holding down clamp and method of removing sheet metal parts from punching machines |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2184118A1 EP2184118A1 (en) | 2010-05-12 |
EP2184118B1 true EP2184118B1 (en) | 2011-09-14 |
Family
ID=40361701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08019519A Active EP2184118B1 (en) | 2008-11-07 | 2008-11-07 | Stepped holding down clamp and method of removing sheet metal parts from punching machines |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2184118B1 (en) |
AT (1) | ATE524252T1 (en) |
PL (1) | PL2184118T3 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010040006A1 (en) * | 2010-08-31 | 2012-03-01 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Method for processing a workpiece on a machine tool |
EP2669024B1 (en) * | 2012-05-30 | 2017-07-05 | TRUMPF Werkzeugmaschinen GmbH + Co. KG | Machine tool and method for pushing out a workpiece part |
EP3299094A1 (en) * | 2016-09-26 | 2018-03-28 | TRUMPF Werkzeugmaschinen GmbH + Co. KG | Method for manufacturing a workpiece and stamp handling tool for performing the method |
CN108188251B (en) * | 2018-03-02 | 2019-05-17 | 丰顺声宝电声元件有限公司 | A kind of Circular Plate handware automatic press processing unit (plant) |
FR3121622B1 (en) * | 2021-04-12 | 2023-11-24 | Siif | GRIPPERING AND PUNCHING HEAD OF A PART ALLOWING ROTATIONAL DRIVE FOR ITS MACHINING |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3979985A (en) | 1973-08-06 | 1976-09-14 | U.S. Amada, Ltd. | Sheet transfer between a turret punch press and an adjacent apparatus |
JPS63256233A (en) * | 1987-04-15 | 1988-10-24 | Matsushita Electric Ind Co Ltd | Press die device |
JP2004283868A (en) | 2003-03-24 | 2004-10-14 | Amada Co Ltd | Punch die, and punching method using the same |
WO2006054694A1 (en) * | 2004-11-19 | 2006-05-26 | Amada Company, Limited | Punching die |
-
2008
- 2008-11-07 AT AT08019519T patent/ATE524252T1/en active
- 2008-11-07 EP EP08019519A patent/EP2184118B1/en active Active
- 2008-11-07 PL PL08019519T patent/PL2184118T3/en unknown
Also Published As
Publication number | Publication date |
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PL2184118T3 (en) | 2012-02-29 |
EP2184118A1 (en) | 2010-05-12 |
ATE524252T1 (en) | 2011-09-15 |
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