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EP-4735189-A1 - METHOD AND SEPARATING DEVICE FOR SEPARATING AT LEAST ONE WORKPIECE FROM A RESIDUAL GRID OF A RESIDUAL GRID ASSEMBLY OF PARTS

EP4735189A1EP 4735189 A1EP4735189 A1EP 4735189A1EP-4735189-A1

Abstract

The invention relates to a method and to a separating device for separating at least one workpiece (7) from a residual grid (8) of a residual grid assembly of parts (9) which is produced in a machine tool (3) from a plate-shaped material (2) by means of a cutting process, wherein the residual grid assembly of parts (9) is fed to a holder (42) of the separating device (41) together with a holding-down element (26) resting on an upper side of the residual grid assembly of parts (9), wherein the holding-down element (26) and the residual grid assembly of parts (9) are jointly excited to vibrate by a vibration drive (45), and wherein the holding-down element (26) enables the at least one workpiece (7) to be separated in a targeted manner only downward with respect to the bottom side of the residual grid assembly of parts (9).

Inventors

  • MACH, PATRICK
  • KRAUSE, STEFAN

Assignees

  • TRUMPF Werkzeugmaschinen SE + Co. KG

Dates

Publication Date
20260506
Application Date
20240630

Claims (17)

  1. 1. Method for separating at least one workpiece (7) from a residual grid (8) of a residual grid component assembly (9) which is produced from a plate-shaped material (2) in a machining process by cutting, characterized in that the residual grid component assembly (9) is fed to a holder (42) of the separating device (41) with a hold-down element (26) resting on an upper side of the residual grid component assembly (9), that the hold-down element (26) and the residual grid component assembly (9) are jointly excited with vibrations by an oscillating drive (45), and that the at least one workpiece (7) is selectively cut out downwards only from the underside of the residual skeleton composite (9).
  2. 2. Method according to claim 1, characterized in that the hold-down element (26) and the residual skeleton part assembly (9) are held together by the holder (42) resting on one another, in particular clamped.
  3. 3. Method according to claim 1 or 2, characterized in that the oscillating drive (45) generates at least one linear drive movement which is oriented independently of direction, preferably in a direction perpendicular to the planar extension plane of the residual grid part assembly (9).
  4. 4. Method according to one of the preceding claims, characterized in that by at least one reversal of the direction of the generated vibration, the at least one workpiece (7) tilted or jammed in the residual grid (8) is aligned by the inertial force against the holding element (26) and is subsequently guided downwards out of the residual grid (8) by gravity and/or a subsequent reversal of direction.
  5. 5. Method according to one of the preceding claims, characterized in that a detection device (47) is provided, in particular positioned below the residual grid part assembly (9), by which the at least one workpiece (7) removed from the residual grid (8) is detected.
  6. 6. Method according to claim 5, characterized in that the oscillating drive (45) is activated until the separation of the workpiece(s) (7) from the residual grid (8) is detected by the detection device (47).
  7. 7. Method according to one of the preceding claims, characterized in that the holder (42), in particular clamping elements (43) or the tensioning elements of the holder (42), are directly subjected to the vibrations of the oscillating drive (45).
  8. 8. Method according to one of claims 1 to 6, characterized in that the vibrations of the oscillating drive (45) are introduced from above into the hold-down element (26) or from below into the residual skeleton part assembly (9).
  9. 9. Method according to one of the preceding claims, characterized in that the oscillating drive (45) is designed as a direction-independent drive device.
  10. 10. Method according to one of claims 1 to 8, characterized in that the oscillating drive (45) is designed as an oscillating conveyor, by means of which the at least one workpiece (7) separated from the residual grid (8) is conveyed away.
  11. 11. Method according to one of the preceding claims, characterized in that the hold-down element (26) and/or the residual grid part assembly (9) are excited with vibrations using an additional vibration tool (34).
  12. 12. Separating device for separating at least one workpiece (7) from a residual grid (8) of a residual grid part assembly (9), which can be produced in a machine tool (3) by cutting a plate-shaped material (2), in particular for carrying out the method according to one of claims 1 to 11, characterized in that at least one holder (42) is provided, by means of which the residual grid component assembly (9) and a hold-down element (26) resting above the residual grid component assembly (9) can be arranged, and in that an oscillating drive (45) is provided, by means of which the residual grid component assembly (9) and the hold-down element (26) resting thereon can be excited jointly with oscillations.
  13. 13. Separating device according to claim 12, characterized in that the holder (42) is formed by clamping elements or tensioning elements, by means of which the hold-down element (26) is held resting, in particular clamped, on the residual grid part assembly (9).
  14. 14. Separating device according to claim 12 or 13, characterized in that a defined distance is provided between the holder (42) and the hold-down element (26) by a damping element (50).
  15. 15. Separating device according to one of claims 12 to 14, characterized in that the oscillating drive (45) is designed as a linear drive device or as an oscillating conveyor.
  16. 16. Separating device according to claim 15, characterized in that the vibrating conveyor accommodates the holder (42) above a bottom (52) of the conveyor trough (51), wherein the holder (42) is arranged at a distance of at least the thickness of the residual skeleton part composite (9) to be separated above the bottom (52).
  17. 17. Separating device according to claim 12, characterized in that the separating device (41) is arranged freely movable on a manipulator (55).

Description

Method and separating device for separating at least one workpiece from a residual grid of a residual grid part composite The invention relates to a method for separating at least one workpiece from a residual grid of a residual grid partial composite, which is produced by cutting from a plate-shaped material in a machine tool. Furthermore, the invention relates to a separating device, in particular for carrying out the method. From DE 20 2018 001 674 Ul a vibrating table for separating workpieces from a residual grid is known, wherein the workpieces are held fixed in the residual grid by a web connection. The vibrating table comprises a vibrating frame, wherein the vibrating frame is mounted on a frame via springs so that it can swing. The vibrating frame is set into vibration by vibration drives. The residual grid part assembly is clamped onto the vibrating frame. A conveyor device is provided below the residual grid part assembly. After the vibrating process has ended, the conveyor device is folded down so that the workpieces separated from the residual grid fall down by gravity. This vibrating table has the disadvantage that during the vibrating process, workpiece parts that have been separated out can also remain above the residual grid, so that it is not guaranteed that all of the workpieces separated out of the residual grid will be guided downwards. From US 2016/0023368 Al a vibration device is known, the functionality of which corresponds to the aforementioned vibrating table. The invention is based on the object of proposing a method and a separating device for separating at least one workpiece from a residual grid of a residual grid-part composite, whereby a controlled and process-reliable separation of the at least one workpiece from the residual grid is made possible. This object is achieved by a method for separating at least one workpiece from a residual grid of a residual grid part assembly, in which the residual grid part assembly is fed to a holder of the separating device with a hold-down element resting on an upper side of the residual grid part assembly, in which the hold-down element and the residual grid part assembly are excited together in the separating device with vibrations of an oscillating drive and in which the at least one workpiece separated from the residual grid is separated by the hold-down element in a targeted manner only relative to the underside of the residual grid, falling downwards. By positioning the hold-down element above the residual grid part assembly, it is ensured that the at least one workpiece separated from the residual grid cannot reach the upper side of the residual grid, but is deliberately only guided downwards, in particular by gravity. The workpiece therefore only has the possibility of being separated from the residual grid in one direction. The separating device can break the web connection, in particular the microjoints or nanojoints, by which the workpiece is held fixed to the residual grid. Furthermore, the hold-down element resting on the residual skeleton partial composite has the advantage that a workpiece which may be tilted or jammed in the residual skeleton, which has been completely cut free or is tilted or jammed after the web connection has broken, can be released and is conveyed downwards due to gravity. Furthermore, it is preferably provided that the hold-down element and the residual skeleton part assembly are held together by the holder in contact with one another. In particular, the hold-down element and the residual skeleton part assembly can be held clamped against one another by the holder. As a result, the hold-down element and the residual skeleton part assembly form a unit during the separation process, which is excited together with vibrations. This enables the at least one workpiece to be separated quickly and safely. It is preferably provided that the oscillating drive generates at least one oscillation or a back and forth movement which is independent of direction, in particular in a direction perpendicular to the plane of extension of the residual grid part assembly and the hold-down element. Due to the reversal of direction in the oscillating back and forth movement of the hold-down element and the residual grid part assembly, the workpiece can initially be aligned due to the inertia of the workpiece when a workpiece is clamped in the residual grid, so that it is transferred from its tilted position to a position lying flat against the hold-down element in order to then be able to fall freely downwards out of the residual grid. In addition, this step of the workpiece falling out can from the residual grid can be supported by a reversal of the direction of the oscillating composite consisting of the hold-down element and the residual grid part composite. To monitor the separation process, it is preferably provided that the removal of at least one workpiece from the residual grid is monitored, preferably by a detection