Method for identification and management of errors and defects in assembly and welding lines for automotive vehicle bodies and body parts or the like and plant in accordance with said method
First Claim
1. In a plant made up of a plurality of automated stations for the performance of an assembly process for body parts or the like with there being in the stations automatic means for support and blocking of the parts to be assembled and automatic assembly means for the supported and blocked parts a method for identification and management of errors and defects comprises:
- a. preliminary analysis steps comprising the steps of;
determining measurement points sensitive to the movement of constraint points which comprise support and blocking points for the parts in the stations, and determining correlations between measurements detectable in said measurement points sensitive to said movement and possible causes which might generate such movement;
b. inline diagnostic steps comprising the steps of;
overseeing any movements in the previously identified measurement points and in this case tracing back to the possible causes of the movements, and signaling such possible causes to allow their elimination if desired or necessary.
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Accused Products
Abstract
A plant is made up of a plurality of automated stations (11) for the performance of an assembly process for body parts or the like. In the stations there are measurement sensors in established measurement points for measurement of geometrical magnitudes of the parts in assembly. The measurement data taken by the sensors are received by a processing unit (16) which detects any deformations of the parts in the various stations and traces back from the deformations detected to the causes thereof and emits a diagnosis signal of the presumed cause. For identification of errors a method in accordance with the present invention comprises an analysis step in which are ascertained measurement points and correlations are ascertained between measurements detectable in the measurement points and possible causes which might generate such movements. In a subsequent inline diagnosis step the processing unit supervises any movements in the previously ascertained measurement points and traces back to the possible causes of the movements and signals such possible causes to allow their elimination if desired or necessary. To ascertain the causes a mathematical model to which are applied possible stresses is used and the deformations generated by it are identified to then compare them with the deformations really measured.
27 Citations
15 Claims
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1. In a plant made up of a plurality of automated stations for the performance of an assembly process for body parts or the like with there being in the stations automatic means for support and blocking of the parts to be assembled and automatic assembly means for the supported and blocked parts a method for identification and management of errors and defects comprises:
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a. preliminary analysis steps comprising the steps of;
determining measurement points sensitive to the movement of constraint points which comprise support and blocking points for the parts in the stations, and determining correlations between measurements detectable in said measurement points sensitive to said movement and possible causes which might generate such movement;
b. inline diagnostic steps comprising the steps of;
overseeing any movements in the previously identified measurement points and in this case tracing back to the possible causes of the movements, and signaling such possible causes to allow their elimination if desired or necessary. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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- 13. Plant made up of a plurality of automatic stations for the performance of an assembly process of body parts or the like with their being in the stations automatic support and blocking means for the parts to be assembled and automatic assembly means for the parts supported and blocked and comprising in the stations measurement sensors in established measurement points for measurement of geometrical magnitudes of the parts in assembly with the measurement data taken by the sensors being received by a processing unit which takes any deformations of the parts in the various stations and goes back from the detected deformations to the causes thereof in the assembly process and emits a diagnosis signal of the presumed cause.
Specification