Automotive

Gap and Flush Inspection

Measure flush and gap during final assembly verification with advanced 3D laser profilers

Cognex 3D laser displacement sensor measures Car door Flush and Gap

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During final assembly verification, automotive manufacturers check that a car’s panels are joined correctly, and adhere to strict dimensional specifications. Doors must lie flush with one another so that they do not pinch near the base. This requires highly accurate gauging of critical gaps and clearances.

Laser profiling offers a turnkey solution for flush and gap measurements. To verify dimensions, a Cognex 3D laser profiler mounted on a robot travels along preselected points of the stationary car doors, generating a 2D profile in x and z. By measuring and comparing z-dimensions, the profiler can detect any difference in height between the two doors. The profiler also computes the gap width between the two vertical edges (x dimension) to ensure it falls within an established tolerance. During inspection, the Profiler’s measurements are delivered as a pass/fail to confirm that the panels have been assembled correctly. Precise measurements can also be exported, along with profile data, for quality management and process control. This data is useful for tuning the automation equipment and robotics upstream before major failures occur.

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