6 SIT: Burr Detection Inspection Tool
To ensure a proper working condition of turned parts, it is fundamental to ensure they do not show any burrs (metal pieces approximately 1 mm long and 0.05-0.10 mm thick) in any hole. Visual inspection is performed using image magnification systems and rotating the sample so that the operator can identify the presence of eventual burrs either in the inner or the outer surface of the part under test. If burrs are detected the part is reworked, thus increasing production time and cost.
This tool performs an automatic identification of burrs in turned components by reproducing, in an automated way, the operations that an operator would do in checking a part, i.e. rotating it and observing the circular shape of each hole. The whole part is inspected under backlighting; backlight illumination is generated by a light stick inserted into the cylindrical part. A custom-designed gripping system ensures the following operations:
- grip the sample in front of the machine vision tool;
- let the stick light illuminator to be placed inside the sample;
- rotate the sample.
The gripping system can be mounted onto a robot to perform Pick-place-Inspect operations.