Surface inspection

When inspecting the surface, there are two primary challenges:

  1. Experienced auditors see a large proportion of the defects reliably and quickly. Visual evaluation, however, is often subjective and very much depends on several factors. Processes are required that make an objective, reproducible evaluation of the defect or failure, and so help to make reliable decisions quickly.
  2. The defects have a height/depth which often is significantly smaller than the geometrical tolerance of the components. In comparison with a CAD data record, the geometrical tolerances become visible; the smaller, local failures cannot be seen.

 

Toleranzbereich

Therefore, we have developed a method that systematically recognizes relevant deviations on the surface and evaluates these:

 In the first step, faultless components are chosen from the customer's quality controle, which are assessed as OK. The sensor detects the surfaces of these components. The generated 3D data is the basis for the parameter calculation of reliable surface forms that are stored in an associative memory (neural network trained with this data).

During the inspection mode, the sensor measures the surface of the test object. Subsequently, the test object is reproduced as an individual master from the faultless components stored in the associative memory.

This master is then compared to the test object. If there is no difference between the calculated master and the test object, the latter is deemed as faultless

The following types of defects can be distinguished:

Pimples
Pimples
Drag Marks
Drag Marks
Constrictions/Cracks
Constrictions/Cracks
Waves
Waves

Please refer to the Evaluation process section for further information on analytical methods.

Contact

INB Vision AG

Phone +49 391 / 6117 - 300
Fax +49 391 / 6117 - 301
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