Automated Nut Fastening
Vision systems locate nuts for automated robotic nutrunner
Find the Circles
A Cognex® In-Sight® vision system determines the position of the nuts in five different axes. Cognex PatMax® pattern matching technology is used to quickly locate the wheel. An In-Sight circle finder tool is used to precisely determine the location of the center of the axle. Two laser lines generate a crosshair on each wheel and an image is acquired of each crosshair at multiple angles. The difference in position of the two crosshairs is calculated to provide the angle at which the wheels are turned and tilted.
Once the angles of the wheel are calculated, the robot moves the nutrunner to tighten the nuts. Automating this application eliminates a health and safety concern associated with repeatedly manipulating heavy nut runners.