Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
  • G01N21/84—Systems specially adapted for particular applications
  • G01N21/88—Investigating the presence of flaws or contamination
  • G01N21/8806—Specially adapted optical and illumination features
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
  • G01N21/84—Systems specially adapted for particular applications
  • G01N21/88—Investigating the presence of flaws or contamination
  • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
  • G01N21/9515—Objects of complex shape, e.g. examined with use of a surface follower device

Definitions

• the present invention relates to a method and a control station for painting automotive body parts.
• optical measuring device such as that sold under the CARFLASH reference by the American company X-RITE.
• This device is mounted at the end of the paint line, on a "stop and go” station, ie in front of which the checked parts mark a stop during which the measurement is made, then resume their progress on the chain. .
• This mode of use of the measuring device is also recommended by its manufacturer.
• the problem that the invention seeks to solve relates to the paint strings other than the paint line of the white box, for which there is a prejudice that a measuring device can not be used to control parts in movement.
• the inventor has carried out measurement tests on moving parts and realized that by positioning the apparatus on a robot that follows the moving parts in a conventional manner, such as for example a robot used for painting operations on moving parts, sufficiently reliable measurements are obtained to identify color drifts.
• the subject of the present invention is a method for controlling the painting of motor vehicle body parts, at the exit of a paint line other than a chain of paint of blank crates, consisting in presenting a measuring apparatus optical device in front of a piece at the output of the paint line, characterized in that the apparatus is moved along the path of the moving part during the measurement, so that, during a predetermined time interval, the apparatus and the room are substantially immobile relative to each other.
• the term “substantially immobile relative to each other” means that the apparatus and the workpiece move at the same speed on two parallel paths, the vibrations to which the workpiece can be subjected. not being taken into consideration in assessing this criterion of immobility.
• the present invention also relates to a motor vehicle bodywork paint inspection station, comprising an optical measuring device, characterized in that the apparatus is mounted on a tracking robot able to move it along the trajectory of a moving part during the measurement so that, during a predetermined time interval, the apparatus and the workpiece are substantially immobile with respect to each other.
• the follower robot is of the same type as the robots used to paint moving parts.
• the measuring apparatus is able to measure according to at least two angles, preferably between three and five angles,
• the measuring apparatus is capable of providing a characteristic measurement of the hue, tension, grain and / or brightness of the paint.
• FIG. 1 is a perspective view of a paint control station at the outlet of a paint line
• - Figure 2 is a view similar to Figure 1 taken at a later stage of the control.
• the checkpoint shown in the drawing is located at the exit of a paint line other than a chain of painting crates in white. Indeed, we see in the drawing that the rails 1 of the conveyor support a carriage 2 provided with two masts 4 carrying a body part 5 of painted plastic, which is here a bumper shield.
• This shield 5 is worn individually and its low weight makes it sensitive to vibrations of the carriage moving on the rails 1 in the direction indicated by the arrow 3.
• a robot 6 carries, at the end of its manipulator arm 7, a measuring device 8.
• the movements of the manipulator arm 7 are programmed in a control device (not shown) of the robot so as to print to the measuring apparatus 8 a translation movement identical to that of the bodywork part 5 for a predetermined predetermined period of time. for taking at least one measure.
• the measuring apparatus and the shield 5 are considered immobile relative to each other, to the vibrations of the shield near.
• the robot 6 is of the same type as those used on the paint line and the device 8 is for example the CARFLASH device of the American company X-RITE.
• the measurements provided by the measuring apparatus 8 are then exploited by a device (not shown) to assess the paint quality of the shield.

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• General Health & Medical Sciences (AREA)
• Immunology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Analytical Chemistry (AREA)
• Biochemistry (AREA)
• Health & Medical Sciences (AREA)
• General Physics & Mathematics (AREA)
• Physics & Mathematics (AREA)
• Pathology (AREA)
• Spray Control Apparatus (AREA)
• Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
• Spectrometry And Color Measurement (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Coating Apparatus (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=34947957

Family Applications (1)

Country Status (5)

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• 2004
  • 2004-07-19 FR FR0407985A patent/FR2873205B1/fr not_active Expired - Fee Related
• 2005
  • 2005-07-12 EP EP05791061A patent/EP1769235A1/fr not_active Withdrawn
  • 2005-07-12 CN CN2005800311175A patent/CN101023340B/zh not_active Expired - Fee Related
  • 2005-07-12 WO PCT/FR2005/001802 patent/WO2006016065A1/fr active Application Filing
  • 2005-07-18 US US11/184,256 patent/US7277164B2/en active Active

Non-Patent Citations (1)

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