3D Inspection: Quality and parts alignment control

By combining the surface modeling file of the part to check with the point cloud generated by a scan of this part, Eyesberg® allows low-cost production compliance control during manufacturing. One application where the 3D vision is helpful is the gap and flush detection for control and quality in the automotive industry. During the final assembly, it is required to check if every car panels go well together with the right amount of gap and flush to avoid any damage when closing the door. This is a key feature in the quality management.

Even though the 2D vision system is sometimes enough to determine the gap between two doors, or a door and body panel, it reaches its limits when it comes to detect the flush, or when the two are on the same plane. 3D vision allows more flexibility in the detection of these gap and flush and can help the robot to precisely recognize the areas where it needs to complete the control task.

Embedded on the robot arm, the 3D vision sensor can scan with high resolution and high precision the area to inspect, and then proceeds to get a 3D cloud of points of the door and the body panel to detect any gap and flush in the production line. The 3D cloud of points allows then measurements and a reliable quality of results. This compact gap and flush solution has been developed and proven to be very efficient in a production environment, with increased safety and performances.

• Avoid excess inspection costs on conventional production lines
• Guarantee the production cycle despite the presence of the in-line inspection
• Check for missing or excess material
• Check the porosity of ground surfaces
• Dimensional inspection
• Surface roughness measurement
• Measurement of shape defects
• Real-time inspection …

The implementation of the Eyesberg® in-line 3D measurement solution requires an initial global tracking of the part to check via a laser scan.

Eyesberg 3D in-line Measurement then allows you to extrapolate the measurement result to a position on a scale for the part: critical/acceptable/good, and this for the entire tolerance range.