EP2184118B1 - Dévêtisseur étagé et procédé destiné à évacuer des pièces en tôle de machines de poinçonnage - Google Patents

Dévêtisseur étagé et procédé destiné à évacuer des pièces en tôle de machines de poinçonnage Download PDF

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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.)
Active
Application number
EP08019519A
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German (de)
English (en)
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EP2184118A1 (fr
Inventor
Wolfgang Laib
Stefan Büttner
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
Original Assignee
Trumpf Werkzeugmaschinen SE and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Trumpf Werkzeugmaschinen SE and Co KG filed Critical Trumpf Werkzeugmaschinen SE and Co KG
Priority to PL08019519T priority Critical patent/PL2184118T3/pl
Priority to AT08019519T priority patent/ATE524252T1/de
Priority to EP08019519A priority patent/EP2184118B1/fr
Publication of EP2184118A1 publication Critical patent/EP2184118A1/fr
Application granted granted Critical
Publication of EP2184118B1 publication Critical patent/EP2184118B1/fr
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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.

Landscapes

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

Claims (10)

  1. Dévêtisseur (1) pour un outil d'estampage (13), le dévêtisseur (1) présentant une face inférieure (39), présentant au moins une première face (8) et une deuxième face (11), non coplanaires, le plan de la première face (8), donc le premier plan, et le plan de la deuxième face (11), donc le deuxième plan étant reliés ensemble par une face de liaison (9), et le dévêtisseur (1) présentant une ouverture pour le passage d'un poinçon (17), caractérisé en ce qu'une première arête (7) s'étend entre le premier plan et la face de liaison (9), dans la zone de l'ouverture (18), le long du contour (4) de l'ouverture (18), sur le côté de la première face (8).
  2. Dévêtisseur (1) selon la revendication 1, caractérisé en ce que le premier plan, dans lequel la première face (8) est située, et le deuxième plan, dans lequel la deuxième face (11) est située, sont parallèles, et la première face (8) est située plus profondément dans l'outil d'estampage (13), lorsqu'on est en position de montage.
  3. Outil d'estampage (13), présentant une partie inférieure d'outil t15) et une partie supérieur d'outil (14), avec un dévêtisseur (1) selon la revendication 1 ou 2, présentant un axe (12).
  4. Outil d'estampage (13) selon la revendication 3, caractérisé en ce que la partie supérieur d'outil (14) présente un poinçon (17), disposé au-dessus de l'ouverture (18) en direction de l'axe (12), et le contour de l'ouverture (18) correspond au moins au contour du poinçon (17), ou est plus gros.
  5. Outil d'estampage (13) selon l'une des revendications 3 ou 4, caractérisé en ce que le dévêtisseur (1) présente un élément (38) élastique, déplaçant le dévêtisseur (1) à l'écart d'un poinçon (16), dans une direction parallèle à l'axe (12).
  6. Machine d'estampage (21) avec un outil d'estampage (13) selon l'une des revendications 3 à 5.
  7. Machine d'estampage (21) selon la revendication 6, caractérisé en ce que la machine d'estampage (21) présente un dispositif de commande, et présente un dispositif d'entraînement (28), déplaçant vers le bas le dévêtisseur (1), indépendamment de la partie supérieure d'outil (14).
  8. Machine d'estampage (21) selon l'une des revendications 6 ou 7, caractérisé en ce que la machine d'estampage (21) présente un logement à outil inférieur (24), avec un premier entraînement en rotation (26), et un logement à outil supérieur (25), avec un deuxième entraînement en rotation (27), et un dispositif de commande, commandant le premier entraînement en rotation (26) et le deuxième entraînement en rotation (27).
  9. Procédé destiné à éjecter des pièces en tôle hors d'une machine d'estampage (21), caractérisé en ce que la machine d'estampage correspond à l'une des revendications 6 à 8, et en ce que le procédé présente les étapes suivantes :
    - étape 1 : positionnement de la pièce en tôle (36) à éjecter, de manière que la pièce en tôle (36) soit séparée d'une tôle résiduelle (35) avec la course d'estampage immédiatement subséquente ;
    - étape 2 : orientation au moins de la partie supérieure d'outil (14), de manière que la première face (8) ne se situe pas au-dessus de la tôle résiduelle (35) ;
    - étape 3 : descente d'un dévêtisseur (1) jusqu'à ce que la pièce en tôle à éjecter soit serrée, et descente de la partie supérieure d'outil (14), jusqu'à ce que la tôle résiduelle (35) soit complètement estampée ;
    - étape 4 : conservation d'une position inférieure du dévêtisseur (1), de manière que la pièce en tôle (36) reste serrée ;
    - étape 5 : déplacement d'une glissière transversale (32) et/ou d'une table de machine (31) en direction X et/ou Y ;
    - étape 6 : déplacement vers le haut du dévêtisseur (1).
  10. Procédé destiné à évacuer des pièces en tôle hors d'une machine d'estampage (21) selon la revendication 9, caractérisé en ce que le procédé présente, après l'étape 5, l'étape suivants :
    - étape 5a : rotation de la partie supérieure d'outil (14) et de la partie inférieure d'outil (15), de manière que la pièce en tôle (36) prenne une position d'éjection ou d'enlèvement.
EP08019519A 2008-11-07 2008-11-07 Dévêtisseur étagé et procédé destiné à évacuer des pièces en tôle de machines de poinçonnage Active EP2184118B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL08019519T PL2184118T3 (pl) 2008-11-07 2008-11-07 Odsadzony dociskacz i sposób usuwania części z blach z wykrawarek
AT08019519T ATE524252T1 (de) 2008-11-07 2008-11-07 Abgesetzter niederhalter und verfahren zum entfernen von blechteilen aus stanzmaschinen
EP08019519A EP2184118B1 (fr) 2008-11-07 2008-11-07 Dévêtisseur étagé et procédé destiné à évacuer des pièces en tôle de machines de poinçonnage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08019519A EP2184118B1 (fr) 2008-11-07 2008-11-07 Dévêtisseur étagé et procédé destiné à évacuer des pièces en tôle de machines de poinçonnage

Publications (2)

Publication Number Publication Date
EP2184118A1 EP2184118A1 (fr) 2010-05-12
EP2184118B1 true EP2184118B1 (fr) 2011-09-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08019519A Active EP2184118B1 (fr) 2008-11-07 2008-11-07 Dévêtisseur étagé et procédé destiné à évacuer des pièces en tôle de machines de poinçonnage

Country Status (3)

Country Link
EP (1) EP2184118B1 (fr)
AT (1) ATE524252T1 (fr)
PL (1) PL2184118T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010040006A1 (de) * 2010-08-31 2012-03-01 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Verfahren zum Bearbeiten eines Werkstücks an einer Werkzeugmaschine
EP2669024B1 (fr) * 2012-05-30 2017-07-05 TRUMPF Werkzeugmaschinen GmbH + Co. KG Machine-outil et procédé destinés à l'évacuation d'une partie d'une pièce
EP3299094A1 (fr) * 2016-09-26 2018-03-28 TRUMPF Werkzeugmaschinen GmbH + Co. KG Procédé de fabrication d'une pièce à usiner et outil de découpe/manipulation destiné à exécuter le procédé
CN108188251B (zh) * 2018-03-02 2019-05-17 丰顺声宝电声元件有限公司 一种圆环板五金件自动冲压加工装置
FR3121622B1 (fr) * 2021-04-12 2023-11-24 Siif Tete de prehension et de poinçonnage d’une piece permettant son entrainement en rotation pour son usinage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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 (ja) * 1987-04-15 1988-10-24 Matsushita Electric Ind Co Ltd プレス金型装置
JP2004283868A (ja) 2003-03-24 2004-10-14 Amada Co Ltd パンチ金型及びその金型を使用するパンチ加工方法
US8714065B2 (en) * 2004-11-19 2014-05-06 Amada Company, Limited Punching die

Also Published As

Publication number Publication date
EP2184118A1 (fr) 2010-05-12
PL2184118T3 (pl) 2012-02-29
ATE524252T1 (de) 2011-09-15

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