WO2019179706A1 - Procédé et dispositif servant au double marquage d'une plaque d'immatriculation pour un véhicule, plaque d'immatriculation réalisée de manière adaptée pour un double marquage - Google Patents

Procédé et dispositif servant au double marquage d'une plaque d'immatriculation pour un véhicule, plaque d'immatriculation réalisée de manière adaptée pour un double marquage Download PDF

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Publication number
WO2019179706A1
WO2019179706A1 PCT/EP2019/054005 EP2019054005W WO2019179706A1 WO 2019179706 A1 WO2019179706 A1 WO 2019179706A1 EP 2019054005 W EP2019054005 W EP 2019054005W WO 2019179706 A1 WO2019179706 A1 WO 2019179706A1
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WO
WIPO (PCT)
Prior art keywords
laser
laser beam
sensitivity
license plate
mark
Prior art date
Application number
PCT/EP2019/054005
Other languages
German (de)
English (en)
Inventor
Frank UTSCH
Bernd Pfundstein
Original Assignee
Erich Utsch Ag
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 Erich Utsch Ag filed Critical Erich Utsch Ag
Publication of WO2019179706A1 publication Critical patent/WO2019179706A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/10—Registration, licensing, or like devices
    • 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
    • B23K26/0006—Working by laser beam, e.g. welding, cutting or boring taking account of the properties of the material involved
    • 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
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
    • B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
    • B23K26/0624—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses using ultrashort pulses, i.e. pulses of 1ns or less
    • 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
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/067—Dividing the beam into multiple beams, e.g. multifocusing
    • B23K26/0676—Dividing the beam into multiple beams, e.g. multifocusing into dependently operating sub-beams, e.g. an array of spots with fixed spatial relationship or for performing simultaneously identical operations
    • 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
    • B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
    • 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
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • B23K26/355—Texturing
    • 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
    • B23K26/362—Laser etching
    • 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
    • B23K26/40—Removing material taking account of the properties of the material involved
    • B23K26/402—Removing material taking account of the properties of the material involved involving non-metallic material, e.g. isolators
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/006—Vehicles
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/34—Coated articles, e.g. plated or painted; Surface treated articles

Definitions

  • the subject of the present invention is a license plate for a vehicle, in particular a motor vehicle, wherein the license plate has a front side with a first surface and a rear side with a second surface.
  • the first surface has a first sensitivity and the second surface has a second sensitivity to a laser beam, wherein the first sensitivity is higher than the second sensitivity.
  • the higher sensitivity of the first surface may, for example, be caused by the fact that the first surface is usually in the form of a reflective film and the second surface is usually in the form of an aluminum surface.
  • the invention relates to a method for double marking of the license plate with at least one laser.
  • a first mark and on the back of a second mark are created on the front of the license plate, wherein the two markers each have identical information and the first mark is created with the laser.
  • the invention relates to a manufacturing station with a laser for processing the license plate.
  • an individual license plate legend or an individual identifier containing information about the vehicle, the holder or the registration period may be produced on the front of the license plate.
  • the second mark on the back is usually created by means of a printing process.
  • Laser marking of the backside is difficult because of the lower sensitivity of the second surface to the laser beams, since the laser beams can not act as much on a material on the back side as on a material on the front side. Therefore, a contrast of a lasered second mark against the second surface of the back would be very weak.
  • the second marking on the backside may not even be produced by the laser.
  • the lasering of the first mark and the printing of the second mark are carried out according to the prior art successively at two different production stations. This is mainly due to the fact that a single manufacturing station, where the lasing and printing can be done, is very expensive to produce.
  • the preparation of the two markers at two different manufacturing stations requires that after the creation of one of the two markings, the license plate be accurately tracked during transport to the next manufacturing station where the other mark is made and random checks are made for the identical information of the two markers become. Accurate tracking and testing adds time and costs to creating the two markers.
  • the object of the present invention is therefore to provide a license plate or a method for processing a license plate, with or at which a time required for a check for identical information of a first and a second mark on a front or back of the license plate in a production of License plate is reduced.
  • license plate is to be understood not only a ready-to-use individualized license plate, but also suitable for producing such a ready-license plate shield blank, which is not yet provided in particular with an individual license plate legend.
  • a license plate for a vehicle according to claim 1 is proposed.
  • the license plate has a front surface having a first surface, a back surface having a second surface, and a coating having a third surface.
  • the first surface has a first sensitivity
  • the second surface has a second sensitivity
  • the third surface has a third sensitivity, each to a laser beam, wherein the first and third sensitivities are each higher than the second sensitivity.
  • a lower intensity of the laser beam is required than for a marking of the second surface by means of the laser beam.
  • the "marking" or “lasering” by the laser beam may include any processing of the first or third surface with the laser, such as engraving, discoloring, melting, burning, peeling or oxidizing the corresponding surface. Marking with the laser beam allows an individual characteristic legend, another individual identifier, official seals and / or security features, such as holograms, are incorporated into the first and / or third surface.
  • the respective above comparison of the first and third sensitivity to the second sensitivity relates in particular to a processing in which the laser beam strikes the corresponding surfaces with the same intensity and acts with the same duration on the respective material of the corresponding surface. Since the rear side has the third surface with the third sensitivity higher than the second sensitivity, the rear side of the license plate can be processed with a laser beam having a lower intensity than would be necessary for a comparable treatment of the second surface.
  • a comparable processing means in particular, producing a marking on the third or second surface, with a respective contrast between the marking and the third or second surface being indistinguishable from the naked eye.
  • an exposure time in which the laser beam must act on the third surface in order to visibly mark it can be compared with an exposure time in which the laser beam must act on the second surface in order to mark it in a similar manner. be reduced.
  • the reduced exposure time makes it easier to label the backside with a laser.
  • the coating with the third surface may enable processing of the backside with the laser only.
  • the third surface can be processed with a laser beam, lasering the front and the back of the license plate at a single manufacturing station with the laser from above or below is possible and time-viable. If the license plate on the single manufacturing station is lasered both on the front and on the back, there is a danger of the license plate between creating swapping a first mark on the first surface and creating a second mark on the third surface. Thus, a time required to control whether the first and second marks have identical information can be reduced. It is also possible that is waived by the inventive license plate on this control.
  • a laser of the same class in particular the same intensity
  • the low second sensitivity to the laser beam causes only marks with a comparatively very weak contrast to markings with a strong contrast on the first surface with the same duration of action of the laser beam on the corresponding surfaces on the second surface with the same intensity of the laser beam can be. If, on the other hand, the second surface were marked with a laser in such a way that a strong contrast would be produced on the second surface, then a laser beam generated by this laser could destroy the first surface.
  • the first surface is preferably designed as a reflection foil.
  • the reflective film covers over half of the front of the license plate, whereby a large-area marking of the front side is made possible by the laser.
  • the front can also have another surface.
  • the license plate in particular comprises aluminum as a shaping material, wherein a surface of the shaping material can form the second surface of the rear side.
  • the coating on the back can preferably be in the form of a layer, preferably a black, printed, varnished or glued layer.
  • the second surface can be arranged next to the coating and in particular adjoin it and form a uniform, smooth surface.
  • an advantageous embodiment provides that the coating is arranged on the second surface. This has the advantage of making the second surface easy before applying the coating edited, in particular remunerated, can be. When the coating is applied after machining the second surface, there is no need to pay attention to the material compatibility of the coating with respect to a selected material for working the second surface.
  • the coating is black or another dark color
  • a high contrast can be produced between a remaining part of the coating after processing and the underlying second surface.
  • the underlying second surface may be perceived in contrast to the remaining portion of the coating.
  • this can be exploited to produce a high-contrast 2D code, in particular a bar code, on the back of the license plate with the laser.
  • the coating and the second surface are formed such that when processing the coating with the laser beam, a color of the second surface is variable.
  • a change in the color of the second surface can be done for example by direct processing with the laser.
  • the change in color may be produced by a reaction of a material of the coating with the second surface, which is activated by the laser beam.
  • the third sensitivity, the second sensitivity and the intensity of the laser beam are matched to one another in such a way that the laser beam aligned with one point of the coating can visibly change the coating and the color of the second surface.
  • the intensity is so strong that the laser beam has to be directed only once to the point. This allows a quick production of the second mark.
  • the change in the color of the second surface is preferably provided in such a way that an already existing contrast between the coating and the second surface not yet processed by the laser is intensified.
  • the color of the second surface may advantageously be white or another light color its and the third surface prefers to have the color black or another dark color.
  • the first sensitivity is approximately equal to the third sensitivity.
  • an intensity of the laser beam can be kept constant during processing of the first and the third surface with the laser.
  • An approximately equal first and third sensitivity means that when the first and third surfaces are treated equally with the laser beam of the same intensity, a mark with approximately the same contrast is generated on the first and third surfaces, respectively. In this comparison of the surface treatment it is assumed that the first and the third surface have the same color.
  • the intensity of the laser beam can be kept constant, laser parameters which are set to produce a certain energy level of a laser medium of the laser need not be changed. This saves time in creating the first mark on the first surface and the second mark on the third surface.
  • a constant intensity of the laser beam when marking the first and the third surface has the further advantage that process fluctuations in marking can be reduced, since process fluctuations can often occur during control operations such as changing the intensity of the laser beam. If the process variations are reduced, higher accuracy can be achieved when marking the first and third surfaces. Also, a cost of calibrating the laser parameters can be reduced if a constant intensity of the laser beam is provided in marking the first and third surfaces.
  • a set of a plurality of license plates is proposed, which may each be designed according to one of the above-mentioned embodiments.
  • the license plates have in comparison to each other a maximum deviation of a respective measured in a plane parallel to the front of the license plates distance between a generated with the laser beam first mark on the first surface and a generated with the laser beam second mark on the third surface of less than 0.06 millimeters.
  • the distance between the first and second mark of the respective license plate may be, for example, the distance formed between a nearest edge of the first mark to an outer edge of the license plate and a nearest edge of the second mark to the outer edge.
  • a respective nearest corner of the markings can be used to the outer edge for determining the distance.
  • the maximum deviation of the distance can be achieved in particular because the front and back of the license plate according to the invention can be processed in a single manufacturing station with a single laser.
  • the license plate between the lasers of the first and second mark must not be turned or transported, whereby the maximum deviation of the distance would be increased.
  • the backside could only be processed with another laser, which would have to have a higher intensity than the intensity required to laser the first or third surface.
  • the further laser can be arranged in the same manufacturing station as the laser; However, such a construction of the manufacturing station is very expensive.
  • first and second marks can be generated simultaneously.
  • either two laser sources can be used, which generate comparable laser radiation
  • the laser radiation is split by means of at least one beam splitter on two partial beams of comparable intensity. These sub-beams are then fed parallel to the top and bottom of the license plate to be marked.
  • the beam splitter can divide the laser beam generated by the laser source into two partial beams of approximately the same intensity / power. This is particularly advantageous if the first surface and the second surface in about have the same sensitivity to the laser radiation used.
  • the beam splitter can also be designed to divide the laser beam generated by the laser source into two partial beams of different intensity / power. This is particularly advantageous if the first surface and the second surface have different sensitivities to the laser radiation used. These different sensitivities can be compensated for so much by the division into two sub-beams of different power / intensity that the formation of the first and the second mark with the same writing parameters is possible.
  • each individual partial beam is controlled separately in order to generate the first or second marking.
  • two separate beam control devices are provided, which are introduced into the beam path of the first or second partial beam.
  • the first and the second partial beam are jointly controlled in order to generate the first and second mark, respectively.
  • only one beam control device is provided, which is introduced into the beam path before the distribution of the laser beam generated by the laser source into a first or second partial beam.
  • the beam control device can be realized by means of a mirror which can be pivoted about two independent spatial directions or by means of at least two mirrors which can be swiveled around an independent spatial direction.
  • the first and the second mark can alternatively also be generated one after the other.
  • only one laser source is then used.
  • two independent laser sources can be used. If only one laser source is used, then in a preferred embodiment a beam control is performed on the first and the second surface (eg the top side or the underside) of the license plate by means of a switchable beam control device. This can be realized, for example, by means of a mirror pivotable between two positions. But electro-optical or acousto-optic switch can be used advantageously.
  • the above-mentioned object can be achieved by a manufacturing station for lasering a license plate for a vehicle.
  • the license plate can be advantageously formed according to one of the above embodiments and has a front and a back.
  • the manufacturing station includes a laser, a mounting system adapted to at least an exterior dimension of the license plate, and a mounting plane in which the license plate can be secured to the mounting system.
  • the mounting plane advantageously divides an entire working area of the manufacturing station into a lower work area below the mounting level and into an upper work area above the mounting level.
  • the manufacturing station has a laser beam deflection device for deflecting a laser beam of the laser.
  • the laser beam deflection device is set up so that it can deflect the laser beam into the lower working area and into the upper working area.
  • the manufacturing station has a controller with a memory. In the memory, a computer program for lasering a first mark having first information and a second mark also having the first information is stored on the license plate.
  • the laser beam deflection device is controllable in such a way that the laser beam, starting from the laser, can both enter into the upper working range and strike the front side for lasing the first marking as well as into the enter lower working area and can hit on the back for lasing the second mark.
  • the first information may be any information with which directly or indirectly the vehicle or the holder of the vehicle can be identified.
  • the first information in the form of an individual license plate legend for the vehicle or other individual identifier may be formed.
  • the first information may include information about a registration period of the vehicle, a MAC address of a holder of the vehicle, a vehicle identification number of the vehicle, information related to a holder of the vehicle, and / or information related to a registered driver of the vehicle.
  • the first mark and / or the second mark can each also have additional information in addition to the first information. However, since the first and second marks have at least the first information, the two marks correlate with each other in each case.
  • the proposed manufacturing station is a laser of the
  • License plate within a single manufacturing station from above and below possible. Thus, it is not necessary to transport the
  • a risk of swapping the license plate between the creation of the first and the second mark can be significantly reduced.
  • a time required to check whether the first and second marks respectively carry the first information, i. at least identical information have to be reduced.
  • the danger of swapping the license plate may be further reduced by securing the license plate during lasering of the first and second marks and in the time between lasing the first and second marks by means of the fastening system.
  • a certainty that the first and the second mark have the first information can also be increased by running the computer program only once, while the two Markings be lasered on the license plate. In this case it is avoided that input parameters of the computer program can be changed between a first and a second run through the computer program. Furthermore, in this variant, it is also not possible for the first marking to be created with a first computer program and the second marking for a second computer program, as might be the case, for example, when producing the two markings by means of two different production stations.
  • the production station has a laser housing, in which the laser is arranged, and the laser beam deflection device has an interior mirror, which is arranged inside the laser housing.
  • the inner mirror is advantageously movable and, in a first position, deflects the laser beam emerging from the laser in a first direction and in a second position in a second direction.
  • the laser beam deflection device is not equipped with movable mirrors outside the laser housing.
  • the inner mirror is preferably completely surrounded by the laser housing, with the exception of an opening, so that the inner mirror, and thus preferably all moving parts of the laser beam deflection device, are protected against contamination. As a result, the maintenance of the manufacturing station can be reduced.
  • the inner mirror is rotatably mounted and is advantageously in operative connection with a Galvanometerantrieb, whereby a fast rotation of the inner mirror is possible.
  • the laser beam deflection device has at least one first exterior mirror, which is arranged outside the laser housing.
  • the inner mirror is preferably arranged outside the fastening plane.
  • the first direction starting from the inner mirror to the first outer mirror and the second direction, starting from the inner mirror to the front or back of the license plate.
  • Mounting surface can be particularly advantageous when a conveyor belt for transporting the license plate is located within or near the mounting plane.
  • the first exterior mirror and a second exterior mirror both of which are arranged outside the laser housing.
  • the inner mirror is disposed within the mounting plane.
  • the first direction, starting from the inner mirror preferably points to the first outer mirror and the second direction starting from the inner mirror to the second outer mirror.
  • the interior mirror, the first and second exterior mirrors are arranged with respect to the mounting plane such that the laser beam, starting from the interior mirror via the first exterior mirror to the first surface, follows the same path as from the interior mirror through the second exterior mirror to the third surface travels. This can facilitate an activation of the laser, in particular a creation of the computer program, for the lasering of the first and second markings.
  • the laser beam deflection device has a beam splitter.
  • the inner mirror may be formed as a beam splitter, wherein the inner mirror in this embodiment is a semi-transparent mirror.
  • the beam splitter may comprise two prisms connected at their base by a composite layer, preferably a resin layer.
  • the beam splitter splits the laser beam into a first sub-beam and a second sub-beam, wherein the beam splitter directs the first sub-beam in the first direction towards the first exterior mirror. From the first exterior mirror, the first partial beam extends toward the front or rear of the license plate. The second partial beam is directed in the second direction by means of the beam splitter.
  • the second part of the beam using the second exterior mirror corresponding to the rear or front of the License plate to be reflected it is also possible that the second partial beam is reflected directly from the beam splitter to the rear or front side of the license plate.
  • a thickness of the composite layer may in this case influence a division ratio between an intensity of the first partial beam and the second partial beam.
  • the beam splitter is designed as a polarizing beam splitter.
  • the division ratio can be varied by using a polarization angle of the laser beam generated by the laser. This has the advantage that it is possible to influence the division ratio by means of a polarization filter between the laser and the beam splitter. As a result, the manufacturing station for various combinations of materials of the front and back of the license plate can be easily adjusted.
  • the division ratio is thereby preferably adapted to a ratio of the first sensitivity to the third sensitivity.
  • the beam splitter can be embodied as a reflection beam splitter, in which the first and the second partial beam are generated by means of reflection.
  • This embodiment may allow a more precise intensity distribution between the first and second partial beam in comparison to the above-mentioned variants of the beam splitter.
  • the inner mirror is designed as a beam splitter
  • the laser beam can be directed in two different directions, without requiring a movement of the inner mirror is necessary.
  • This may allow for more precise lasering of the first and second markings.
  • the more precise lasering allows a higher resolution of the markers and therefore the possibility of making the first or second mark smaller, whereby a required area can be reduced.
  • the first and the second mark can be lasered simultaneously, whereby a certainty that the two marks have the first information is further increased.
  • a method for double marking a license plate for a vehicle by means of at least one laser is also proposed.
  • the license plate has a front surface having a first surface and a back surface having a second surface, wherein the first surface has a first sensitivity and the second surface has a second sensitivity to a laser beam of the laser and the first sensitivity is higher than the second sensitivity.
  • the license plate is designed according to one of the variants described above. The method comprises the following steps.
  • the license plate is mounted in a mounting plane of a manufacturing station.
  • the manufacturing station is preferably designed according to one of the abovementioned embodiments of the production station described above.
  • a coating is produced on the back of the license plate.
  • the coating in this case has a third surface with a third sensitivity to the laser beam, wherein the third sensitivity is higher than the second sensitivity.
  • a first mark on the first surface is generated by the laser in an upper working area above the mounting plane.
  • the first marker has at least a first information.
  • a second mark is created on the third surface by means of the laser or another laser in a lower working area below the mounting plane.
  • the second mark also has the first information.
  • the first information is formed according to one of the variants described above.
  • the coating with the third sensitivity which is higher than the second sensitivity, it is possible to have both the first mark on the first surface and the second mark on the third surface with the laser or make another laser. This facilitates making the first and second mark in the same manufacturing station, because the two markings with the same manufacturing process, ie by a laser process can be created.
  • the second mark is created immediately after the first mark. This further increases certainty that the two marks are correlated with each other, i. have the first information. More preferably, no manual operation is performed at the manufacturing station between the creation of the first and second markings, whereby the assurance that the two markings are correlated with one another is increased all the more.
  • the license plate between the generation of the first and the second mark is not released.
  • the license plate can be secured in the mounting plane with the mounting system described above against manual removal.
  • a preferred embodiment of the proposed method provides that the same laser is used to generate the first and second markings.
  • the laser beam of the laser is deflected with a laser beam deflection device at least once into the lower work area and at least once into the upper work area.
  • the laser beam deflection device is designed according to one of the abovementioned variants.
  • the third sensitivity is approximately equal to the first sensitivity, such that the laser parameters for adjusting an intensity of the laser beam for generating the second mark after generating the first mark need not be changed.
  • a particular embodiment provides that the first and / or the second mark are each generated in the form of a bar code. This can have a significantly higher information density compared to alphanumeric characters. Thus, a required area for the first and / or the second mark can be kept as small as possible.
  • the first and / or the second mark are each generated in the form of a QR code.
  • This also has a higher information density compared to alphanumeric characters.
  • the QR code can have other advantages.
  • data represented by the QR code is protected by an error-correcting code. This may make it possible that even with a loss of up to 30% of the QR code, the information stored in the QR code is still completely readable. Thus, even a partially scratched QR code can still be completely readable.
  • a particularly simple variant of the method provides to produce the first and / or the second mark each in the form of an alphanumeric lettering with the laser. This may facilitate data processing when executing the computer program and / or reduce a requirement for laser precision. In both cases it is possible to save costs.
  • first and / or the second mark are engraved by means of the laser in the first surface or the third surface.
  • a thickness of the coating is preferably adapted to a depth that is achieved when engraving the third surface.
  • the second marking is produced by a color removal of the third surface with the aid of the laser.
  • the third surface can be applied in the form of a color layer on the second surface and subsequently the second marking with the aid of the laser by the color removal are generated.
  • Another possible variant of the method provides to create the second mark by a color change of the second or third surface using the laser.
  • the third surface can be heated with the aid of the laser in such a way that a layer on the third surface with a color effect is produced by a thermally induced oxidation process.
  • a bluish color effect may be caused.
  • a color change can also be caused by heating the coating to above a melting point of the coating.
  • the variants of the method in which a color removal or a color change are caused have the advantage over engraving the first or second mark that a lower energy or intensity of the laser is required. As a result, energy and a time required for the laser medium to reach a given energy level can be saved in the production of the two markings.
  • the first and / or the second mark are produced in the form of periodic nanostructures with the aid of the laser.
  • the nanostructures in the first or third surface can function like a diffraction grating and produce a different color effect as a function of a viewing angle.
  • a linearly polarized pulsed laser is preferably used, preferably with pulse times in the picosecond or femtosecond range.
  • hologram effects can be realized with nanostructures produced in this way.
  • the laser is designed as an ND: YAG laser.
  • the laser medium is a neodymium-doped YAG crystal, wherein the laser can emit infrared radiation having a wavelength of, for example, 1064 nanometers, 946 nanometers, 1320 nanometers and 1444 nanometers.
  • the advantage of this variant is that the laser beam can be coupled into a glass fiber. With the glass fiber, the laser beam can very easily around obstacles be guided in the laser housing to the inner mirror, since the glass fiber can be bent.
  • the laser is designed as a JV0 4 laser, wherein the laser medium is a neodymium-vanadate crystal.
  • the laser medium is a neodymium-vanadate crystal.
  • JV0 4 and YAG lasers have the advantage that metals can better absorb the laser beams of JV0 4 and JAG lasers because the wavelength of these lasers is smaller by a factor of about 10 than the wavelength of laser beams a C02 laser.
  • the laser is designed as a single-mode laser in which a power distribution with a maximum forms along the surface to be processed. Compared to a multimode laser with a power distribution with several maxima, this has the advantage that with the single-mode laser, a higher-resolution first and / or second mark can be produced.
  • a special variant may provide that the laser beam deflection has a Kodensorlinse.
  • a laser beam coming from the first exterior mirror can be concentrated on the surface to be marked. This can, on the one hand, produce a more precise production of the first and second markings and, on the other hand, also reduce the energy consumption of the laser.
  • the laser deflection apparatus preferably has a movable first control mirror which is movable at least about a first axis of rotation and preferably a second control mirror which is movable at least about a second axis of rotation which is perpendicular to the first axis of rotation.
  • the laser beam is deflected by the first and second control mirrors and can thus travel along the first and third surfaces to create the first and the second mark, respectively.
  • the control unit preferably controls both the interior mirror and the two control mirrors for marking the first and third surfaces. Furthermore, a method for processing a license plate is proposed to solve the above problem.
  • the license plate has a front surface with a first surface and a back surface with a second surface.
  • the first surface has a first sensitivity and the second surface has a second sensitivity to a laser beam, wherein the first sensitivity is higher than the second sensitivity.
  • a coating having a third surface with a third sensitivity to the laser beam is formed on the back surface.
  • the third sensitivity is greater than the second sensitivity.
  • the license plate processed by the proposed method can be laser marked in the above-described manufacturing station on the front and rear sides. As a result, a double marking of the license plate in the same manufacturing station is possible. This has the consequence that it is possible to dispense with a check as to whether the first and second markings each have the first information after the double marking.
  • the coating is particularly advantageously selected from a set of different coatings, each with different materials, wherein a material of the coating is adapted to the intensity of the laser beam.
  • the material of the coating can be adapted to a material of the second surface.
  • “Adjusted” means that the marking of the third surface can be carried out in a controlled manner, ie that, for example, when marking the third surface, the second surface does not heat up in such a way that the entire coating is burned away the material of the coating is adapted to a material of the first surface, for example, so that the first sensitivity is equal to the third sensitivity.
  • FIG. 1 is a schematic sectional view of a manufacturing station for lasing a front and a back of a license plate
  • FIG. 2 is a plan view of the front of the license plate of FIG. 1,
  • FIG. 3 is a plan view of the back of the license plate of FIG. 1,
  • FIG. 5 is a sectional view of the license plate of FIG. 1,
  • Fig. 6 is a schematic sectional view of another manufacturing station for lasing a front and a back of a license plate with a beam splitter.
  • FIG. 1 shows a production station 1 for lasering a license plate 2.
  • the license plate 2 has a front side 3 and a back side 4 with a coating 5.
  • the front side 3, the rear side 4 and the coating 5 have correspondingly a first surface 6, a second surface 7 and a third surface 8.
  • the first surface 6 has a first sensitivity
  • the second surface 7 has a second sensitivity
  • the third surface 8 has a third sensitivity to a respective laser beam of equal intensity, the first and third sensitivities each higher than the second sensitivity is.
  • the manufacturing station 1 has a fastening system 10, a laser 11, a laser beam deflection device for deflecting a laser beam 12 of the laser 11 and a control unit 13 with a memory 14.
  • the license plate 2 can be mounted in a mounting plane 15.
  • the fastening system 10 is at least an external dimension 16 the license plate 2 adapted.
  • the outer dimension 16 shown in FIG. 1 is preferably a length of the license plate 2.
  • the mounting plane 15 divides an entire work area of the manufacturing station 1 into a lower work area 17, which is located below the mounting level 15, and an upper work area 18, which is located above the mounting level 15 on.
  • a computer program 19 for lasering a first marking 20 and a second marking 21 on the license plate 2 is stored in the memory 14, the first marking 20 having a first information 28 and the second marking 21 having the first information 28.
  • the first information 28 is exemplarily formed in the form of the capital letter "T" as shown in Figures 2 and 3.
  • the first information 28 is preferably configured as a vehicle identification number or a tag legend.
  • the laser beam deflection device is controllable in such a way that the laser beam 12 can enter from the laser 11 both into the upper working area 18 and hit the front 3 for lasing the first marking 20, as well as into the lower working area Enter 17 and can meet on the back 4 for lasing the second mark 21.
  • the control unit 13 is connected to a galvanometer drive, not shown in FIG. 1, for adjusting an interior mirror 22.
  • the inner mirror 22 directs the laser beam 12 in a first direction to a first outer mirror 23 in a first position shown in dashed lines and in a second position shown by solid lines the laser beam 12 in a second direction towards a second exterior mirror 24.
  • Both the first exterior mirror 23, the second exterior mirror 24 and the interior mirror 22 belong to the laser beam deflection device of the production station 1.
  • the interior mirror 22 is arranged inside and the two exterior mirrors 23, 24 outside a laser housing 25.
  • the front side 3 with the first marking 20 and the back side 4 with the second marking 21 are shown correspondingly.
  • the coating 5 with the third surface 8 is located on the second surface 7.
  • the first marking 20 and the second marking 21 are arranged at a distance 26 from a right outer edge 27 of the license plate 2 shown in FIGS. 2 and 3.
  • a position of the first mark 20 on the license plate 2 correlates with a position of the second mark 21 on the license plate 2. This makes it easier to automatically read out the first and second markers 20, 21.
  • FIG. 4 shows steps of a method for double marking of the license plate 2 shown in FIG. 1, wherein the license plate 2 at the beginning of the method does not yet have the coating 5 and the two markings 20, 21.
  • a first step 41 the license plate 2 is fixed in the mounting plane 15 of the manufacturing station 1.
  • the coating 5 is produced on the second surface 7.
  • the coating 5 can be printed in the form of a black rectangle, for example with a printer on the second surface 7.
  • a third step 43 the first mark 20 is produced on the first surface 3 by means of the laser 11 in the upper working area 18 above the mounting plane 15.
  • the interior mirror 22 is controlled by means of the control unit 13 and the computer program stored thereon 19 such that it is in the first position.
  • the laser beam 12 emanating from the laser 11 is directed in the first direction to the first exterior mirror 23 and from there to the first surface 3, so that the laser beam 12 extends within the upper working area 18.
  • a fourth step 44 the second mark 21 is generated on the third surface 8 by means of the laser 11 in the lower working area 17 below the mounting plane 15.
  • the inner mirror 22 is controlled by means of the control unit 13 such that it assumes the second position and directs the laser beam 12 in the second direction toward the second exterior mirror 24.
  • the laser beam 12 is in the direction of deflected third surface 8 so that it meets the third surface 8 and extends within the lower working area 17.
  • the individual steps 41, 42, 43 and 44 of the method shown in FIG. 4 can be executed in a first variant when the license plate 2 is located inside the manufacturing station 1.
  • the second step 42 is performed before the license plate 2 is fixed in the mounting plane 15.
  • the coating 5 can be applied to the second surface 7 at a second production station.
  • Fig. 5 is a sectional view of a specific embodiment of the license plate 2 is shown.
  • the license plate 2 has a shaping layer 51, which comprises aluminum, for example.
  • the license plate 2 is coated on the front side 3 with a reflective foil 52, wherein a free side of the reflective foil 52, the first surface 6 is formed.
  • a coating of the coating 5 can melt and / or burn in such a way that the material 51 comes to light.
  • discoloration of the material 51 can be achieved by the impact of the laser beam 12.
  • the discoloration is advantageously a whitish color, which in combination with a remaining part of the coating 5 causes a high contrast.
  • the coating 5 preferably has a dark, in particular black, color.
  • FIG. 5 shows a further refinement of the license plate 2 shown in FIG. 5
  • the license plate 2 has a light, preferably white, second coating 54, with which the shaping material 51 is coated on the rear side 4.
  • part of the coating 5 can be lasered away in such a way that the second coating 54 emerges, thereby forming a contrast between the coating 5 and the second coating 54.
  • FIG. 6 shows a second variant of the manufacturing station 1 for lasering the license plate 2.
  • equivalent parts are provided with the same reference numerals as in the first variant of the manufacturing station according to FIG.
  • a laser 111 is arranged so that a first partial beam 101 of the laser beam 12 strikes the first exterior mirror 23 without deflection.
  • the laser beam 12 passes through an interior mirror 122, which is designed as a semitransparent mirror and acts as a beam splitter.
  • the interior mirror 122 passes a first part of the laser beam 12 without deflecting in the form of the first partial beam 101.
  • a second part of the laser beam 12 is reflected on a composite layer 102 and leaves the inner mirror 122 in the form of a second partial beam 103.
  • the two partial beams 101, 103 and thus the two markings 20, 21 are generated simultaneously.

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

Abstract

L'invention concerne une plaque d'immatriculation (2) pour un véhicule. La plaque d'immatriculation comporte un côté avant (3) pourvu d'une première surface (6), un côté arrière (4) pourvu d'une deuxième surface (7) et un revêtement (5) pourvu d'une troisième surface (8). La première surface (6) présente une première sensibilité, la deuxième surface (7) présente une deuxième sensibilité, et la troisième surface (8) présente une troisième sensibilité par rapport à un faisceau laser (12). La première et la troisième sensibilité sont respectivement plus élevées que la deuxième sensibilité. Une intensité du faisceau laser (12) inférieure à celle pour un marquage de la deuxième surface (7) au moyen du faisceau laser (12) est requise pour un marquage de la première surface (6) et de la troisième surface (8) au moyen du faisceau laser (12).
PCT/EP2019/054005 2018-03-20 2019-02-18 Procédé et dispositif servant au double marquage d'une plaque d'immatriculation pour un véhicule, plaque d'immatriculation réalisée de manière adaptée pour un double marquage WO2019179706A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018106580.9A DE102018106580A1 (de) 2018-03-20 2018-03-20 Verfahren zur zweifachen Markierung eines Kennzeichenschildes für ein Fahrzeug
DE102018106580.9 2018-03-20

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WO2019179706A1 true WO2019179706A1 (fr) 2019-09-26

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Citations (6)

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EP0219011A2 (fr) * 1985-10-15 1987-04-22 GAO Gesellschaft für Automation und Organisation mbH Carte d'identité pourvue d'une marque d'authenticité décelable visuellement et son procédé de réalisation
EP0419377A1 (fr) * 1989-09-22 1991-03-27 Schneider Electric Sa Procédé, dispositif et peinture de marquage laser pour boitiers moulés d'appareils électriques
US6594926B1 (en) * 1999-02-11 2003-07-22 Edward J. Wujciga Vehicle license plate cover
DE102008032751B3 (de) * 2008-07-11 2009-12-10 Innolas Systems Gmbh Laserbearbeitungsvorrichtung und Laserbearbeitungsverfahren mit Doppel- oder Mehrfachspot mittels eines Galvanoscanners
CN105665935A (zh) * 2015-12-29 2016-06-15 四川大学 一种基于co2激光双向加热方式的微探针尖端成形系统
DE102016100926A1 (de) * 2016-01-20 2017-07-20 Erich Utsch Ag Prägepresse zum Prägen von KFZ-Kennzeichen-Platinen, sowie Verfahren zum Betreiben der Prägepresse

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DE10004593C1 (de) * 2000-02-03 2001-09-06 Alcan Gmbh Verfahren und Vorrichtung zur Herstellung von Platinen für Kraftfahrzeug-Nummernschildern
DE10226718A1 (de) * 2002-05-08 2003-11-20 Utsch Ag Erich Herstellungsverfahren für Kraftfahrzeug-Kennzeichenschilder, Kraftfahrzeug-Kennzeichenschild und Vorrichtung zur Durchführung des Verfahrens
DE10241803A1 (de) * 2002-09-06 2004-03-18 Erich Utsch Ag Herstellungsverfahren für Hochsicherheits-Kennzeichenschilder, Hochsicherheits-Kennzeichenschilder und Vorrichtung zur Durchführung des Verfahrens
WO2007122443A1 (fr) * 2006-04-25 2007-11-01 Cl Inspiration Llc Dispositif laser amélioré destiné à former des textes ou des images sur des cartes de crédit ou analogues
DE102009031871B4 (de) * 2009-07-06 2013-10-24 Nanosec Gesellschaft Für Nanotechnologie In Der Sicherheitstechnik MBH Verfahren und Vorrichtung zur Laserbeschriftung
DE102014012291A1 (de) * 2014-08-22 2016-02-25 Tönnjes Isi Patent Holding Gmbh Kennzeichen für ein Fahrzeug

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0219011A2 (fr) * 1985-10-15 1987-04-22 GAO Gesellschaft für Automation und Organisation mbH Carte d'identité pourvue d'une marque d'authenticité décelable visuellement et son procédé de réalisation
EP0419377A1 (fr) * 1989-09-22 1991-03-27 Schneider Electric Sa Procédé, dispositif et peinture de marquage laser pour boitiers moulés d'appareils électriques
US6594926B1 (en) * 1999-02-11 2003-07-22 Edward J. Wujciga Vehicle license plate cover
DE102008032751B3 (de) * 2008-07-11 2009-12-10 Innolas Systems Gmbh Laserbearbeitungsvorrichtung und Laserbearbeitungsverfahren mit Doppel- oder Mehrfachspot mittels eines Galvanoscanners
CN105665935A (zh) * 2015-12-29 2016-06-15 四川大学 一种基于co2激光双向加热方式的微探针尖端成形系统
DE102016100926A1 (de) * 2016-01-20 2017-07-20 Erich Utsch Ag Prägepresse zum Prägen von KFZ-Kennzeichen-Platinen, sowie Verfahren zum Betreiben der Prägepresse

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