WO2006074840A1 - Dispositif et procede pour traiter un element de garniture interieure d'automobile - Google Patents

Dispositif et procede pour traiter un element de garniture interieure d'automobile Download PDF

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Publication number
WO2006074840A1
WO2006074840A1 PCT/EP2005/056271 EP2005056271W WO2006074840A1 WO 2006074840 A1 WO2006074840 A1 WO 2006074840A1 EP 2005056271 W EP2005056271 W EP 2005056271W WO 2006074840 A1 WO2006074840 A1 WO 2006074840A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor vehicle
vehicle interior
interior trim
trim part
scanning
Prior art date
Application number
PCT/EP2005/056271
Other languages
German (de)
English (en)
Inventor
Volker Kantz
Andreas Steiner
Original Assignee
Faurecia Innenraum Systeme 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 Faurecia Innenraum Systeme Gmbh filed Critical Faurecia Innenraum Systeme Gmbh
Publication of WO2006074840A1 publication Critical patent/WO2006074840A1/fr

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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B60R21/2165—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by a tear line for defining a deployment opening

Definitions

  • the invention relates to a device and a method for processing a motor vehicle interior trim part and a computer program product.
  • the invention is based on the object to provide an improved method and an improved device and a computer program product for processing a motor vehicle interior trim part with a laser.
  • the invention provides a method for processing a motor vehicle interior trim part with a laser beam.
  • a surface profile of a surface to be machined of the motor vehicle interior trim part is scanned at several measuring points.
  • the scanning is done by a sensor, such as an optical sensor or a probe.
  • a predetermined course of movement of the motor vehicle interior trim part is corrected with reference to a laser optics.
  • the processing of the surface of the motor vehicle interior trim part is then carried out by applying the laser beam during the corrected course of motion.
  • the invention makes it possible to detect component tolerances of the motor vehicle interior trim part to be machined by scanning the surface profile.
  • the component tolerances detected by the scanning are used to correct a predetermined course of motion, which relates, for example, to an ideal surface profile profile.
  • the predetermined course of motion is adapted to the vehicle interior trim part, which is afflicted with the component tolerances. Accordingly, an improved machining result can be achieved because the movement pattern during the exposure of the surface to the laser beam is corrected in accordance with the component tolerances detected by the scanning.
  • This correction is particularly advantageous when the laser optics is stationary and has a stationary focal point.
  • the stationary focal point in order to obtain an optimal machining result, it is necessary for the stationary focal point to be located as precisely as possible on the machining point on the surface of the motor vehicle interior trim part.
  • LFT-D long fiber thermoplastic direct process
  • ILC in-line compounding
  • the plastic is incorporated directly into the system (so-called in-line compounding) and mixed with the component-dependent additives.
  • the reinforcing fibers are incorporated directly into the plastic melt and molded into the component.
  • the present invention also allows for automotive interior trim parts made in a long fiber thermoplastic (LFT) which, accordingly, have relatively large component tolerances to machine accurately with a laser beam, such as an invisible one Set breaking line for the realization of the outlet opening of an airbag manufacture.
  • LFT long fiber thermoplastic
  • a component subject to tolerances can also be processed in such a way that an invisible predetermined breaking line is realized and the predetermined opening forces are maintained.
  • the sampling takes place before the start of the course of the movement.
  • the motor vehicle interior trim part is first fixed in a robot gripper.
  • the surface profile of the motor vehicle interior trim part located in the robot gripper is then scanned at the intended measuring points. Only after the scanning has taken place at all measuring points, the course of motion is started to apply the laser beam to the surface.
  • This has the advantage that it is not necessary to scan the surface simultaneously with laser processing. This makes it possible in particular to use a relatively inexpensive sensor principle for the scanning of the surface, such as a probe for the mechanical scanning of the surface profile.
  • the probe is stationary.
  • the motor vehicle interior trim part located in the robot gripper is moved by the robot along the probe, so that it can scan the surface profile. Thereafter, the correction of the predetermined course of motion with the measured values thus obtained and the application of the laser beam to the surface during the corrected course of motion takes place.
  • the scanning of the surface profile after the motor vehicle interior trim part has been fixed in the robot gripper has, in particular, the advantage that the motor vehicle interior trim part is already in its processing position for later exposure to the laser beam.
  • conditional elastic deformations of the motor vehicle interior trim part are detected in the scan, so that they can go into the correction of the predetermined course of movement with. Since the exposure of the surface with the laser beam in the same position of the motor vehicle interior trim part with With respect to the robot gripper as the scanning is done, this results in a particularly high precision machining.
  • the laser optics and the laser focal point are stationary.
  • the given course of motion refers to an ideal surface profile that is not subject to tolerances.
  • the predetermined course of motion is chosen such that a substantially constant distance between the processing points provided for the processing on the surface and the laser optics is maintained, i. the distance between a machining point and the laser optics is the same for all machining points when the machining point passes the laser beam. In particular, this distance is chosen so that the focus is as congruent with the processing points.
  • the correction of the predetermined course of motion then takes place in such a way that the essentially constant distance is maintained even in the case of the real surface profile of the motor vehicle interior trim part, which is subject to component tolerances.
  • the predetermined course of motion is adapted such that the robot gripper moves the motor vehicle interior lining part somewhat closer to the laser optics.
  • a correction value for the entire course of the movement can be stored.
  • fluctuations in the material composition of different batches of motor vehicle interior trim parts can be taken into account.
  • Such a correction value can be added as a global offset to the given course of motion, so that the distance between the processing points and the laser optics changes accordingly.
  • specific correction values can also be entered for one or more of the processing points.
  • the addition or subtraction of a uniform offset is also advantageous for the correction of tolerances of the laser optics.
  • the laser optics has a focal lens that needs to be replaced from time to time, with the focal lenses relative to their Focal length tolerances have.
  • the focal length of the focal lens, to which the predetermined course of motion relates is stored.
  • the focal length of the replacement focal lens is measured and compared with the focal length of the first focal lens.
  • the difference of the focal lengths gives the global offset, which is added to or subtracted from the given course of motion.
  • a desired break line is generated by the laser processing. This may be groove-shaped and / or as a perforation.
  • the invention relates to a computer program product, in particular a digital storage medium, for controlling a robot to set a motor vehicle interior trim part in a course of movement, while a surface to be machined of the motor vehicle interior trim part is subjected to a laser beam.
  • the computer program product can drive the robot and / or a suitable measuring sensor for scanning a surface profile of the surface to be processed and calculate a correction of the predetermined course of the movement with the measured values obtained by the scanning.
  • FIG. 1 shows a block diagram of an embodiment of a device according to the invention for the laser processing of a motor vehicle interior trim part
  • FIG. 2 shows a flow chart of an embodiment of a method according to the invention.
  • FIG. 1 schematically shows a motor vehicle interior trim part 100, such as an instrument panel.
  • the motor vehicle interior trim part 100 has a surface 102, which is visible in the installed position of the motor vehicle interior trim part 100 from a motor vehicle interior.
  • the motor vehicle interior trim part 100 has a surface 102 opposite surface 104, which is not visible in the installed state of the motor vehicle interior trim part.
  • the surface 102 is the skin of an instrument panel and the surface 104 is the underside of the instrument panel, which is generally formed by the support layer of the instrument panel.
  • FIG. 1 schematically shows an ideal surface profile 106 of the surface 104 as well as a real surface profile 108 of the surface 104, which is subject to component tolerances.
  • the motor vehicle interior trim part 100 is clamped in a gripper 110 of a robot 112.
  • the robot 112 with its gripper 110 is arranged so that it can move the motor vehicle interior trim part 100 in the area of a sensor 114 and a laser optics 116.
  • the sensor 114 is used to scan the real surface profile 108.
  • the sensor is stationary.
  • the sensor 114 has an interface 118 for outputting the measurements obtained by the scan to a controller 120 having a corresponding interface 122.
  • the sensor 114 is, for example, a probe with a mechanical probe for scanning the surface profile 108. For example, the position of a potentiometer of the probe is changed by the probe, so that the course of the surface profile is converted into an electrical signal.
  • the processing of the motor vehicle interior trim part 100 takes place with a laser 124.
  • the laser 124 supplies a laser beam, which can pass from the laser optics 116 to the surface to be processed.
  • the laser optics 116 has a fixed focal length 126.
  • both the laser optics 116 and the laser 124 are stationary.
  • the controller 120 has a memory 128 with a memory area 130 for storing a predetermined course of motion.
  • the predetermined course of motion describes the relative movement of the motor vehicle interior trim part 100 with respect to the laser optics 116.
  • This predetermined course of motion relates to the ideal surface profile 106 and is preferably selected so that each treatment point on the ideal surface profile 106 is at a distance from the laser optics 116. the focal length corresponds to 126 when the processing point is applied to the laser beam.
  • a movement pattern for the movement of the robot gripper with the motor vehicle interior trim part 100 along the sensor 114 can be stored in the memory area 130 for the purposes of the scanning.
  • the determination of the motion profiles can be done by calculation or simulation on the basis of CAD data of the motor vehicle interior trim part 100.
  • the movement patterns are determined by so-called teaching of the robot.
  • the robot gripper is manually brought to so-called teaching points, which are then stored.
  • teaching points are preferably substantially congruent with the sample points and the processing points.
  • the memory 128 further has a memory area 132 for storing the measurements provided by the sensor 114.
  • the controller 120 has a processor 134 for executing a control program 136 for the robot 112.
  • the control program 136 has a program module 138 for interpolating the sensor measured values 132 and a program module 140 for calculating a corrected course of motion taking into account the measured or interpolated sensor measured values. For processing the motor vehicle interior trim part 100, this is first clamped in the gripper 110.
  • the robot 112 is controlled by the controller 120 or the control program 136 such that the sensor 114 can scan the real surface profile 108 at a plurality of, for example six measuring points. For example, these measuring points are at the same time machining points which are to be loaded later with the laser beam.
  • the measured values acquired by the sensor 114 are output via its interface 118 and input via the interface 122 into the controller 120, where they are stored in the memory area 132.
  • the interfaces 118 and 122 can be connected directly or indirectly via a network.
  • a fieldbus, an Ethernet or a so-called. Realtime Ethernet can be used for this purpose.
  • TCP / IP can be used as the transmission protocol.
  • the measured values of the sensor are first detected by the controller of the laser attenuation system which controls the laser 124. From there, the measured values are read out and in a separate computer in a format that is compatible with the controller 120 of the robot 122.
  • the sensor readings stored in the memory area 132 are interpolated by the program module 138.
  • a correction of the movement history stored in the storage area 130 is calculated by the program module 140 on the basis of the optionally interpolated sensor measured values. If, for example, the scanning of the surface profile 108 indicates that a processing point is located in a trough, then the predetermined course of motion is correspondingly corrected, that is to say the gripper 110 must be moved closer to the depth of the trough closer to the laser optical system 116 if the relevant processing point coincides with the laser beam is applied. Accordingly, the distance of the gripper 110 from the laser optics is to be increased when a processing point is above the ideal surface profile 106.
  • the correction of the predetermined course of motion ensures that each of the processing points is at a distance when exposed to the laser beam from the laser optics 116, which corresponds to the focal length 126 as closely as possible.
  • control program 136 controls the robot 112 such that it places the gripper 110 with the motor vehicle interior trim part 100 in the corrected course of movement while the laser 124 is switched on.
  • the laser beam removes material from the surface 104 at the processing points, so that, for example, a desired break line is formed.
  • FIG. 2 shows a corresponding flow chart.
  • step 200 the motor vehicle interior trim part to be processed is received by the robot gripper.
  • the motor vehicle interior trim part located in the robot gripper is then measured by being scanned at a plurality of measuring points.
  • step 204 with the aid of the measured values thus obtained, a predetermined course of motion, which relates to an ideal surface profile which does not involve tolerance, is corrected in order to take account of the component tolerances actually present. Thereafter, the motor vehicle interior trim part is placed in the corrected course of motion, while at the same time an exposure to the laser beam takes place (step 206).

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

La présente invention concerne un procédé pour traiter un élément de garniture intérieure d'automobile (100) avec un faisceau laser. Ce procédé consiste à balayer un profil de surface (108) d'une surface à traiter de l'élément de garniture intérieure d'automobile en plusieurs points de mesure, à corriger une trajectoire de mouvement prédéfinie (130) de l'élément de garniture intérieure d'automobile par rapport à un système optique laser (116) avec les valeurs de mesure obtenues grâce au balayage, puis à soumettre la surface au faisceau laser avec la trajectoire de mouvement corrigée.
PCT/EP2005/056271 2005-01-12 2005-11-28 Dispositif et procede pour traiter un element de garniture interieure d'automobile WO2006074840A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510001608 DE102005001608B4 (de) 2005-01-12 2005-01-12 Vorrichtung und Verfahren zur Bearbeitung eines Kraftfahrzeug-Innenverkleidungsteils
DE102005001608.1 2005-01-12

Publications (1)

Publication Number Publication Date
WO2006074840A1 true WO2006074840A1 (fr) 2006-07-20

Family

ID=35997632

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Application Number Title Priority Date Filing Date
PCT/EP2005/056271 WO2006074840A1 (fr) 2005-01-12 2005-11-28 Dispositif et procede pour traiter un element de garniture interieure d'automobile

Country Status (2)

Country Link
DE (1) DE102005001608B4 (fr)
WO (1) WO2006074840A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4104964A1 (fr) * 2021-06-15 2022-12-21 JENOPTIK Automatisierungstechnik GmbH Procédé et dispositif universel de production d'une ligne de rupture et installation d'usinage dotée d'un tel dispositif

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007049849A1 (de) * 2007-10-18 2009-04-23 GM Global Technology Operations, Inc., Detroit Vorrichtung und Verfahren zur Ausbildung einer Nut einer Airbagabdeckung in einem Fahrzeuginnenverkleidungsteil
DE102011006532A1 (de) * 2011-03-31 2012-10-04 Bayerische Motoren Werke Aktiengesellschaft Schweißvorrichtung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0299324A (ja) * 1988-10-07 1990-04-11 Toyota Motor Corp エアバック蓋部を有する内装部品の製造方法
GB2276354A (en) * 1993-03-22 1994-09-28 Klippan Autoliv Snc A cover for a vehicle air-bag
EP0711627A2 (fr) * 1994-10-31 1996-05-15 Tip Engineering Group, Inc. Procédé de création d'une amorce de rupture sur une garniture de recouvrement pour véhicule automobile, pour une ouverture de déploiement de sac gonflable
DE19636429C1 (de) * 1996-09-07 1997-11-20 Jenoptik Jena Gmbh Verfahren zur Herstellung einer Schwächelinie mittels Laser
US5883356A (en) * 1996-05-13 1999-03-16 Tip Engineering Group, Inc. Laser scoring process and apparatus
EP1118421A2 (fr) * 1999-12-22 2001-07-25 Honda Giken Kogyo Kabushiki Kaisha Méthode d'usinage par perforation avec un faisceau laser
WO2002026534A1 (fr) * 2000-09-27 2002-04-04 Jenoptik Automatisierungstechnik Gmbh Recouvrement d'airbag avec ligne de rupture, et son procede de production
US20020125231A1 (en) * 2000-05-16 2002-09-12 General Scanning Inc. Method and system for precisely positioning a waist of a material-processing laser beam to process microstructures within a laser-processing site

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATA602002A (de) * 2002-01-16 2005-10-15 Tms Produktionssysteme Gmbh Verfahren und vorrichtung zum schweissen, löten oder schneiden

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0299324A (ja) * 1988-10-07 1990-04-11 Toyota Motor Corp エアバック蓋部を有する内装部品の製造方法
GB2276354A (en) * 1993-03-22 1994-09-28 Klippan Autoliv Snc A cover for a vehicle air-bag
EP0711627A2 (fr) * 1994-10-31 1996-05-15 Tip Engineering Group, Inc. Procédé de création d'une amorce de rupture sur une garniture de recouvrement pour véhicule automobile, pour une ouverture de déploiement de sac gonflable
US5883356A (en) * 1996-05-13 1999-03-16 Tip Engineering Group, Inc. Laser scoring process and apparatus
DE19636429C1 (de) * 1996-09-07 1997-11-20 Jenoptik Jena Gmbh Verfahren zur Herstellung einer Schwächelinie mittels Laser
EP1118421A2 (fr) * 1999-12-22 2001-07-25 Honda Giken Kogyo Kabushiki Kaisha Méthode d'usinage par perforation avec un faisceau laser
US20020125231A1 (en) * 2000-05-16 2002-09-12 General Scanning Inc. Method and system for precisely positioning a waist of a material-processing laser beam to process microstructures within a laser-processing site
WO2002026534A1 (fr) * 2000-09-27 2002-04-04 Jenoptik Automatisierungstechnik Gmbh Recouvrement d'airbag avec ligne de rupture, et son procede de production

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4104964A1 (fr) * 2021-06-15 2022-12-21 JENOPTIK Automatisierungstechnik GmbH Procédé et dispositif universel de production d'une ligne de rupture et installation d'usinage dotée d'un tel dispositif

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Publication number Publication date
DE102005001608A1 (de) 2006-09-14
DE102005001608B4 (de) 2007-08-23

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