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End of line testing of complete car instrument carriers with stationary test part and camera cloud

The interior design of a passenger car has now developed into a strong differentiating feature in the automotive industry. 
Customers can equip their cars individually in an almost unlimited variety of combinations and immediately notice any differences in colors, fabrics, and quality.
Manufacturers must meet these requirements as production conditions continue to become tougher in terms of greater efficiency and automation.
In addition, there are legal requirements, such as traceability of products and their components with complete documentation.

As an internationally recognized specialist in the field of test automation and quality assurance, Ziemann & Urban GmbH has developed a solution that raises the testing of passenger car interior equipment and ambient lighting to an unprecedented level:
Customized end-of-line testing systems for passenger car interior components that test 100% of all manufactured parts for functionality and freedom from defects and document every detail.

The concept of the test systems is then based on the customer`s manufacturing philosophy.
In the case presented here, Ziemann & Urban realized a stand-alone test system for complete car instrument carriers for its customer. Since the customer`s primary goal was to minimize inspection time, a concept with a stationary instrument carrier and cameras and lighting arranged around it was selected in order to have all features immediately in view.

The components are inserted manually or with a customer-specific handling device for ergonomic movement of larger loads. The component type and serial number are read in via a barcode. In addition, the "nominal" configuration to be inspected is transferred from the customer`s ERP system. The test results are also transferred to this system after completion of the process. After the inspection system has been closed via an automatic high-speed door, images are captured and all features are inspected. Contour and ambience lighting are contacted with plug-on LEDs in order to test the light conductors. 

In the OK case, the parts can then be removed immediately. In NOK case the parts are locked. Depending on the type of error, rework can be performed or the component can be removed and discharged after confirmation. A detailed PDF report is generated for each part. It contains all individual images with superimpositions of the inspection results as well as all traceability data. 

The system is designed for two vehicle types with exchangeable holders.

Technical data:

  • standalone test cell with steel welding frame
  • automatic fast door
  • Windows10 based image processing system ZU-Vision
  • 17 fixed cameras with resolutions 2...12 MegaPixel
  • Visualization and user guidance PC based via ZU-Control software
  • manual component insertion in component specific images
  • no changeover necessary between variants (left-hand drive/right-hand drive)
  • no moving parts (except locking of NOK parts)
  • changeable part fixtures for different part types
  • individually switchable LED illumination
  • cycle time < 50s incl. manual part handling
  • inspection time 10...30s depending on number of features and necessary image captures
  • interface to customer`s own MES/ traceability system
  • automatic creation of a PDF report with all part images and visualization of inspection results per part


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