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use of CFRP will require new approaches to such metrology- guided assembly and not only because an SMR may mark the surface. “That material is much more fl exible, and so they need to measure the gaps on those mating surfaces faster and more precisely,” Moon said, and noncontact is the only way to do so reliably. To advance noncontact sensing technology, API will be releasing a new product it calls RapidScan, a white-light based ‘spatial co-related stereovision system.’ The portable scanning device will scan a range of refl ective surfaces and detect edges, holes, and other fea- tures. API will offer it in two sizes, either tripod-mounted or mounted on a robot or other machine-mount device. According to Moon, because it uses smart feature recognition, the scan- ner does not require markers placed on the part or fi xturing to orient itself in the reference frame. Its high-defi nition cameras determine its position. Data sampling is more than a million points per second. In tests to date, API said the system overall accuracy is less than 50 µm or 0.002", though Moon acknowledged there are many ways to state accuracy for such a system. “Our result is ba sed on a single shot [con- sistent with] providing a semi-real-time solution,” he explained.


Smaller Parts, Complex Shapes Another distinct advantage of non- contact metrology technologies such as laser scanners is their ability to capture complex shapes. “Our scan volume ranges from the size of a dime to the size of a small refrigerator,” said Pierre Aubrey, president of ShapeGrabber (Ottawa, ON, Canada). ShapeGrabber supplies metrology-class 3D scanners that are both fast and easy to use. Parts are placed into the scanner and auto- matically rotated on a turntable, without the need for special precision fi xturing.


“We can completely scan and measure a part such as a 3" [76.2-mm] tall turbine blade in about two minutes,” Aubrey said. Typical aerospace parts measured with their equipment also include small structural parts and complex interior pieces.


Precision all in one shot. Self-Centering ID Clamps


From Carr Lane Manufacturing


ID Clamps from Carr Lane Manufacturing are self-centering, allowing precise clamping on the inner diameter of a part. Now you can profi le around the outside of your part without running into other clamps.


• Machinable to precisely fi t the desired hole • Clamp a part using an existing hole • Allows access to fi ve sides without any clamp interference


See “New Items” in the online catalog at CarrLane.com.


Booth #215


April 2015 | AdvancedManufacturing.org 69


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