The Need to CT Scan Parts
How the Process Works
The resulting scan, called a tomogram, depicts the inside of the subject as if it had been cleanly sliced into two sections — thus, these images are colloquially referred to as slices. Because more dense materials (e.g., metal) absorb more X-Rays than less dense materials (e.g., air), a tomogram displays the variance between the amount of energy absorbed by parts being scanned, with lighter areas representing areas of greater density and darker areas representing areas of less density. The entire process of taking one slice, from exposure through detection and finally to tomographic reconstruction (the background operation that yields an interpretable image from the raw data the detector receives), takes a matter of minutes due to the processing power afforded by modern computing.
Applications of CT Scanning
By importing the final file into a metrology software, they can easily measure any of the part’s features by referencing any other point on the model. Performing Part-to-CAD or Part-to-Part comparisons can help easily determine whether the sample parts comply with the tolerances outlined in their design materials. One of CT’s strength in this specific application is that, because technicians take measurements from the CAD model and not from the part itself, ATS can return the sample more quickly than is possible with other methods.