Two Widely Separate Applications Of High Speed 3D Machine Vision In The Automotive Industry
25 May 2004
De-Palletising of Cast Gearbox Housings
Gearbox housings are frequently delivered from a castings producer on pallets with little regard for their position or orientation. In a robotic unpacking and placing process the pick and place arm needs to recognise the correct place on the casting to position its grippers. A complete 3D profile scan of the part is required to determine both the position and orientation of the casting to place the robotic arm accurately. Faunhofer IPA of Stuttgart has added the 3D Ranger Scanning system from the Swedish company Integrated Vision Products to its pick and place robot to carry out processes of this type.
The IVP system utilises a low power laser which is scanned over the target area or, alternatively, the pallet holding the part may be moved through the beam. In either case a detector acquires the reflected signal from the casing's surface. The system can scan the part at rates of hundreds or thousands of scans per second quickly building up an accurate 3D profile of the part under examination. This can be compared to an ideal stored image of the part in the correct orientation with respect to the robot arm and instructions are fed to the robot to change the grabbing mechanisms to the correct position for picking up and placing correctly.
Further developments of the system include the selection and picking of parts from a randomly filled bin using the same technology.
Inspection and Control Adhesives
Adhesives are being used more widely in the automotive industry replacing rivets or screws for the fixing of many components. When the process is automated it is often difficult to dispense the correct amount of adhesive consistently or to form a continuous line of the substance due to changes in the delivery nozzle caused by residuals left there. Using 3D imaging, the IVP Range M50 vision inspection system can accurately measure the presence and both the height and width of the adhesive bead at high speeds to control the pump system delivering the material ensuring that the process continues within set limits.
The IVP 3D systems are able to detect parts presence, or monitor and measure complex parts at scan rates of several thousand scans per second for inspection and control in a wide range of applications.
For more information contact Doug Bell at Lambda Photometrics Ltd
Lambda House, Batford Mill, Harpenden, Herts AL5 5BZ
Tel: 01582 764334 Fax: 01582 712084
For more information on the IVP range of products click here
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