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WO2019081576A1 - Procédé et dispositif de découpe de plaques de tôle - Google Patents

Procédé et dispositif de découpe de plaques de tôle

Info

Publication number
WO2019081576A1
WO2019081576A1 PCT/EP2018/079149 EP2018079149W WO2019081576A1 WO 2019081576 A1 WO2019081576 A1 WO 2019081576A1 EP 2018079149 W EP2018079149 W EP 2018079149W WO 2019081576 A1 WO2019081576 A1 WO 2019081576A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
metal strip
sheet metal
controller
predetermined
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.)
Ceased
Application number
PCT/EP2018/079149
Other languages
German (de)
English (en)
Inventor
Jan-Peter Große
Karsten KLINKER
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.)
L Schuler GmbH
Original Assignee
L Schuler GmbH
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 L Schuler GmbH filed Critical L Schuler GmbH
Publication of WO2019081576A1 publication Critical patent/WO2019081576A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • B23K26/032—Observing, e.g. monitoring, the workpiece using optical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
    • B23K26/0846—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt for moving elongated workpieces longitudinally, e.g. wire or strip material

Definitions

  • the invention relates to a method and a device for cutting sheet metal blanks from a continuously transported in a transport direction sheet metal strip according to the preambles of claims 1 and 1 1st
  • Such a method and such a device are known for example from DE 10 2015 218 650 B3.
  • a ventilation device for ventilating a gap of the support device is provided on a supporting device which is moved continuously with a laser cutting device. This allows an improved removal of the dust in the dust removal device. Adhesions of hot cutting dust to a bottom of the strip are avoided.
  • the sheet metal blanks cut from the sheet metal strip are usually lifted off at the end of a laser cutting device by means of robots and placed on a transport means for discharging the sheet metal blank to a further processing station. Unless the sheet metal blank has been completely cut out of the sheet metal strip, the sheet metal strip is lifted by means of the robot at the end of the laser cutting device. As a result, the metal strip changes its position with respect to the upstream laser cutter. This can lead to the fact that by means of the laser cutting device, the next sheet metal plate in turn is not completely cut out of the sheet metal strip.
  • the object of the invention is to eliminate the disadvantages of the prior art.
  • it is intended to specify a method which is as simple as possible for the early detection of a sheet metal blank not completely cut out of the sheet metal strip.
  • the detection of the incorrectly cut sheet metal plate should be done as early as possible so that subsequently an automatic correction is possible.
  • Another object of the invention is to provide a device suitable for carrying out the method. This object is solved by the features of claims 1 and 1 1.
  • the invention is based on the observation that a laser beam generated by the laser cutting device is not always along a predetermined
  • Cutting line completely cut through the sheet. This is usually caused by a waviness of the sheet, impurities on the surface of the sheet or the like. If the laser beam does not completely penetrate the sheet-metal strip, the incidence of light in the downstream of the beam dust discharge duct decreases.
  • a photosensitive first sensor it is now proposed to measure the incidence of light in the dust discharge shaft by means of a photosensitive first sensor. The ones from The first sensor supplied signals are transmitted to the controller and compared there with a predetermined threshold for the incidence of light. If the limit value is undershot, the special mode of operation is triggered by means of the controller.
  • a transport speed of the metal strip and the movements of the laser cutting device are controlled in accordance with a predetermined cutting program in such a way that sheet metal blanks are cut out of the sheet metal strip with a predetermined contour in a "Regel jostamalite".
  • the "special operating mode” provided according to the invention is a mode of operation different from the "standard operating mode”.
  • the special mode of operation can be carried out simultaneously with the control mode or instead of the control mode.
  • the Sonder jostician serves the most continuous maintenance of the Regel isttagen.
  • the special mode of operation has the purpose to correct as possible while avoiding interruption of the transport of the metal strip incorrectly executed cuts or to remove faulty manufactured metal blanks.
  • the special mode of operation comprises one or more of the following functions: stopping the transport device and the movement of the laser cutting device, performing an additional cutting deviating from the predetermined cutting program by means of the laser cutting device, supplying two not completely separate sheet metal blanks to a scrap container.
  • the stopping of the transport device can already take place when cutting the sheet metal blank.
  • an unwanted lifting of the metal strip at the end of the laser cutting device can be safely and reliably prevented.
  • due to the lifting of the metal strip conditional trailing errors can be avoided on other metal blanks.
  • no staff is required.
  • the function is selected as a function of a time duration for which the predetermined limit value is undershot.
  • the longer the time the larger the material bridge.
  • a material bridge can be cut during the continuous transport of the sheet metal strip by executing an additional cut deviating from the specified cutting program by means of the laser cutting device.
  • the functions can also be triggered successively in a predetermined sequence, if, for example, by means of an additional cut, a material bridge can not be severed.
  • a material bridge can first be removed by carrying out an additional cut by means of the laser cutting device. If this is not the case, in a hierarchy next level two not completely separate sheet metal blanks one Supplied scrap container. If this measure can not be expected to eliminate a disturbance of the Regel plantetechnisch, the transport device and the movement of the laser cutting device is stopped in a hierarchically next step. In this case, there is then the possibility that the operating personnel will eliminate the fault and subsequently restart the control mode.
  • the special mode of operation is only triggered when the predetermined limit value is undershot for a predetermined period of time.
  • the predetermined period of time is chosen so that when they exceed a material bridge between the ends of the cutting line is to be expected, which z. B. is no longer cut when lifting the sheet metal blank by means of the robot. If the predetermined limit value is undershot only within the predetermined period of time, the resulting material bridges are so small that they are separated when lifting the sheet metal blank or at a transfer to a stacking device. Thus, an unnecessary interruption of the process can be avoided.
  • a material bridge is cut through by means of the additional section, or a section of the sheet metal strip containing the material bridge is removed from the sheet metal strip.
  • the "material bridge" is an undesirable contour section of a sheet metal blank, which deviates from a predetermined contour and interrupts a cutting line.
  • the laser cutting device can be equipped with a camera, for example. By means of an image recognition system, the ends of the cutting lines can be detected and subsequently the material bridge can be cut through by means of the laser cutting device. In the case of complex errors, it is alternatively also possible, by means of the laser cutting device, to cut out a portion of the sheet metal strip which at least partially contains the sheet metal blank and subsequently to reject it.
  • the Staubab 2010schacht extends over the direction perpendicular to the transport direction y-direction, ie across the width of the metal strip.
  • the first sensor is expediently provided at a lateral end of the Staubab manufacturedschachts.
  • the first sensor is advantageously located outside a working area of the laser cutting device. It is expediently provided at the lateral end outside the Staubab manufacturedschachts. This contamination of the first sensor can be avoided by cutting dust.
  • a photosensitive second sensor for observing the incidence of light is provided in the Staubab Kunststoffschacht at the other lateral end of Staubab technologicalschachts.
  • the second sensor may also conveniently be mounted outside the dust removal duct.
  • the provision of the second sensor enables a redundant signal generation and thus a reliable and reliable detection of a falling below the predetermined limit value for the incidence of light.
  • the first sensor and / or the second sensor may be sensors which are / are specific to the wavelength of a laser light generated by the laser cutting device. Thus, specifically, the light incidence caused by the laser beam can be detected. Signal distortions by other light sources, such as daylight or the like., Can be avoided. This further increases the reliability of the proposed method.
  • the special mode of operation is triggered if the limit value specified for the incidence of light is simultaneously undershot at the first sensor and at the second sensor.
  • the limit value specified for the incidence of light may be simultaneously undershot at the first sensor and at the second sensor.
  • it may be, in particular because of the cutting dust discharged through the dust discharge shaft, that the first sensor and the second sensor detect a different light incidence. Falling below the limit may be due to cutting dust.
  • An erroneous detection of the incidence of light can be minimized by evaluating the signals supplied by the first sensor and the second sensor.
  • the special mode of operation can advantageously only be triggered if the predetermined limit value for the predetermined time duration is simultaneously undershot at the first sensor and at the second sensor. Also, it can be minimized by cutting dust inaccuracies in the detection of light incidence.
  • a photosensitive first sensor for observation of the light is provided in the Staubab 2010schacht, the first sensor is connected to the signal transmission to the controller, and the controller is further prepared so that when falling below a predetermined limit for the incidence of light a special mode of operation is triggered.
  • the control is usually a process computer or computer provided with a program suitable for carrying out the above method.
  • FIG. 1 is a schematic view of an apparatus for cutting Blechpla- tines
  • Fig. 2 is a detailed perspective view of a support means and a downstream StaubabGermanschachts
  • 3 is a sectional view of FIG .. 2
  • reference numeral 1 denotes a coil on which a sheet metal strip 2 is received.
  • the sheet-metal strip 2 is guided by a transport device 3, by means of which it is transported continuously in a transport direction T.
  • the transport device 3 may be, for example, a roller leveler.
  • the sheet-metal strip 2 is fed to a laser cutting device 4.
  • the laser cutting device 4 comprises two upstream laser cutting devices 5 and 6, which can be moved back and forth in the transporting direction T as well as a perpendicularly extending y-direction.
  • the reference numeral 7 designates a downstream third laser cutting device, which is also movable in the transport direction T and in the y direction back and forth. At the end of the cutting line there is a robot 8, can be lifted with the cut out of the sheet metal strip 2 sheet metal blanks B and placed on a transport device 9 for removal.
  • Reference numeral 10 designates a controller with which the transport device 3 is controlled such that the sheet-metal strip 2 is transported at a predetermined transport speed in the transport direction T.
  • the reference numeral 1 1 denotes a photosensitive first sensor which is assigned to a (not visible here) Staubab thoroughlyschacht the first 5 and the second laser device 6.
  • the reference numeral 12 denotes a further light-sensitive first sensor, which is assigned to the third laser cutting device 7.
  • the first sensors 1 1, 12 are connected to the controller 10 for the transmission of measurement signals. With the controller 10, the robot 8 is also controlled. Downstream of the laser cutting devices 5, 6, 7 is advantageously also a light barrier 13, with a lifting of the metal strip 2 of the controller 10 is displayed.
  • FIG. 2 shows a perspective partial view of one of the laser cutting devices 5, 6, 7.
  • the metal strip 2 is supported in the cutting area on a supporting device, generally designated by the reference numeral 14.
  • the support device 14 comprises in the cutting area a first support strip 15 and an oppositely disposed second support strip 16.
  • the first 15 and the second support strip 16 extend approximately in the y-direction. Between the support strips 15 and 16, a gap S is formed through which a laser beam L passes.
  • the first 15 and the second support strip 16 are by means of a conventional device not shown here in the direction T along with a cutting nozzle 17 movable.
  • the first support bar 15 with a first upstream upstream conveying means, z. B. a first belt conveyor 18 may be connected.
  • first 20 and second guide rollers 21 of the belt conveyors 18, 19 can be movable in a conventional manner to form the gap S along with the cutting nozzle 17 of the laser cutting device.
  • the reference numeral 22 denotes a Staubab centuryschacht which extends in a direction away from a lower side U of the sheet-metal strip 2 discharge direction A (see FIG. 3).
  • the reference numeral 11 designates the first sensor, which is arranged on the one side of the dust guide shaft 22 for detecting the incidence of light in the y-direction.
  • Reference character S1 denotes a first cutting line section made by means of the laser beam L.
  • the sheet-metal strip 2 is fed in a control mode by means of the transport device 3 continuously in the transport direction T at a predetermined transport speed of the laser cutting device 4.
  • Cutting line sections S1, S2 are first produced in the sheet-metal strip 2 by means of the upstream first and second laser cutting devices 6.
  • the cutting line sections S1, S2 are selected so that the sheet-metal strip 2 still remains in connection.
  • With the downstream third laser cutting device 7, the cutting line sections S1 and S2 are connected to each other, so that the sheet metal blank B results.
  • a faulty sheet metal Bf is shown, in which the cutting line sections S1, S2 have not been correctly connected to each other. There is a material bridge M left. As a result, the robot 8 would lift the metal strip 2 when lifting such a defective sheet metal Bf.
  • a light incidence in the dust discharge duct 22 is detected by means of the first sensors 11, 12.
  • the signals supplied by the first sensors 1 1, 12 are detected by the controller 10 and compared there with a predetermined limit of light incidence. If the predetermined limit value is undershot, a time measurement is advantageously started. If the predetermined limit value is undershot for longer than a predetermined period of time, a special operating mode is triggered by the controller 10.
  • an additional cut deviating from the predetermined cutting program is carried out by means of the laser cutting device 4. If a plurality of laser cutting devices 5, 6, 7 are provided, the additional cut can be carried out, for example, with a downstream laser cutting device.
  • the additional cut is advantageous legally enough to cross the interrupted cutting line on both sides of the material bridges. This achieves a particularly safe and reliable restoration of a connection of the interrupted cutting line. If, within the scope of the special mode of operation, it is no longer possible to carry out an additional cut without interrupting the continuous transport of the sheet-metal strip 2, two not completely separate sheet metal blanks are fed downstream of the laser cutting device 4 to a scrap container for a second function.
  • second sensors may be provided, which also communicate with the Control 10 are connected for signal transmission.
  • the signals supplied by the first 1 1, 12 and the second sensors can faulty cutting lines be detected particularly reliable. It can also be determined with the controller 10, in which portion of the respective cutting line, the error is. The corresponding information can be transferred to the third laser cutting device 7 for carrying out the correction routine.
  • a lifting of the metal strip 2 can be detected by means of the robot 8.
  • the conveyor 3 is also stopped by means of the controller 10.
  • a laser cutting device 4 with a plurality of laser cutting devices 5, 6, 7 is shown in the exemplary embodiment shown, the method according to the invention can also be carried out with a single laser cutting device 5, 6, 7.
  • sensors 1 1, 12 sensors are used suitably, which are specific to the wavelength of the laser cutting device 5, 6, 7 generated laser light. This can be minimized interference, for example by daylight or other artificial light sources.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

L'invention concerne un procédé destiné à découper des plaques de tôle (B) à partir d'une bande de tôle (2) transportée en continu dans une direction de transport (T), les étapes suivantes étant effectuées dans un mode de fonctionnement normal prédéfini : le transport de la bande de tôle (2) dans une direction de transport (T) au moyen d'un dispositif de transport (3), la vitesse de transport de la bande de tôle (2) étant commandée au moyen d'une commande (10), le découpage à rotation de la bande de tôle (2) au moyen d'un dispositif de découpe laser (5, 6, 7) pouvant être déplacé en va-et-vient dans la direction de transport (T) ainsi que dans une direction y (y) s'étendant perpendiculairement à la direction de transport (T), au moyen de la commande (10) selon un programme de découpe prédéfini, la bande de tôle (2) s'appuyant contre un dispositif d'appui (14) déplacé en va-et-vient dans la direction de transport (T) à rotation avec le dispositif de découpe laser (5, 6, 7), et une ouverture (S) du dispositif d'appui (14) étant orientée vers le faisceau laser (L), l'évacuation de poussière de découpe (Ss) par l'intermédiaire d'un puits d'évacuation de poussière (22) disposé en aval de l'ouverture dans la direction de faisceau du faisceau laser (L). Le procédé est caractérisé par les étapes supplémentaires suivantes : la détection d'une incidence de la lumière dans le puits d'évacuation de poussière (22) au moyen d'un premier capteur sensible à la lumière (11, 12), l'émission de signaux du premier capteur (11, 12) vers la commande (10), et le déclenchement d'un mode de fonctionnement particulier prédéfini au moyen de la commande (10) lorsqu'une valeur d'incidence de la lumière est inférieure à une valeur seuil prédéfinie.
PCT/EP2018/079149 2017-10-27 2018-10-24 Procédé et dispositif de découpe de plaques de tôle Ceased WO2019081576A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017125303.3A DE102017125303A1 (de) 2017-10-27 2017-10-27 Verfahren und Vorrichtung zum Schneiden von Blechplatinen
DE102017125303.3 2017-10-27

Publications (1)

Publication Number Publication Date
WO2019081576A1 true WO2019081576A1 (fr) 2019-05-02

Family

ID=64049200

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/079149 Ceased WO2019081576A1 (fr) 2017-10-27 2018-10-24 Procédé et dispositif de découpe de plaques de tôle

Country Status (2)

Country Link
DE (1) DE102017125303A1 (fr)
WO (1) WO2019081576A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115846898A (zh) * 2022-11-29 2023-03-28 苏州天弘激光股份有限公司 一种三横梁卷料金属激光自动切割机及其控制方法
CN121004374A (zh) * 2025-10-28 2025-11-25 广州市海茂动漫科技有限公司 一种篮球游艺设备壳体加工输送装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022121341A1 (de) * 2022-08-24 2024-02-29 TRUMPF Werkzeugmaschinen SE + Co. KG Laserschneiden eines Werkstücks unter Schutz der Bearbeitungsvorrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004034256A1 (de) 2004-07-14 2006-02-16 Schuler Automation Gmbh & Co.Kg Vorrichtung zum Schneiden von Blech
WO2008151838A1 (fr) * 2007-06-14 2008-12-18 Trumpf Werkzeugmaschinen Gmbh + Co.Kg Procédé de détection d'une lumière de processus au cours d'une opération de séparation d'un matériau sous forme de plaque et dispositif pour la mise en oeuvre dudit procédé
DE102015218650B3 (de) 2015-06-12 2016-10-20 Schuler Automation Gmbh & Co. Kg Vorrichtung zum Schneiden von Blechplatinen aus einem Blechband
DE102015218649A1 (de) * 2015-09-15 2017-03-16 Schuler Automation Gmbh & Co. Kg Vorrichtung zum Schneiden von Blechplatinen aus einem Blechband

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004034256A1 (de) 2004-07-14 2006-02-16 Schuler Automation Gmbh & Co.Kg Vorrichtung zum Schneiden von Blech
WO2008151838A1 (fr) * 2007-06-14 2008-12-18 Trumpf Werkzeugmaschinen Gmbh + Co.Kg Procédé de détection d'une lumière de processus au cours d'une opération de séparation d'un matériau sous forme de plaque et dispositif pour la mise en oeuvre dudit procédé
DE102015218650B3 (de) 2015-06-12 2016-10-20 Schuler Automation Gmbh & Co. Kg Vorrichtung zum Schneiden von Blechplatinen aus einem Blechband
DE102015218649A1 (de) * 2015-09-15 2017-03-16 Schuler Automation Gmbh & Co. Kg Vorrichtung zum Schneiden von Blechplatinen aus einem Blechband

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115846898A (zh) * 2022-11-29 2023-03-28 苏州天弘激光股份有限公司 一种三横梁卷料金属激光自动切割机及其控制方法
CN121004374A (zh) * 2025-10-28 2025-11-25 广州市海茂动漫科技有限公司 一种篮球游艺设备壳体加工输送装置

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