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Technical Summary

This work has addressed various aspects of Reverse Engineering. The main aim is to highlight the applications of Reverse Engineering in different areas. The whole procedure is summarized below.

Before starting the part digitization, tip of the scanner should be calibrated. Proper fixtures should be designed to hold the part during scanning. If the part moves or even vibrates during scanning, the scanned data will be inaccurate. FARO arm is a contact type scanner, which is used for digitization. It has got wide variety of probes. Depending upon the component to be digitized, probe is selected. Components, which cannot be scanned in one view, were scanned in multiple scans. All the point clouds of the same component are then registered using common curves, which were scanned using point probe. While registration, the best fitting algorithm is based on the relative position of the data.

Once the component is digitized the data can be used for

The digitized data generated from the actual component straight away triangulated and can be saved in stereolithography format. This stereolithography format can be directly exported to any CAM package for the generation of tool path. This stereolithography format is acceptable to all Rapid Prototyping machines so this triangulated data can be used for generating prototypes. For CAD to Part inspection the CAD model and scanned data are registered using already scanned common curves. The inspection analysis produces a color-coded 3D image of the object. Areas in green are within tolerance whereas areas in red and blue represent positive and negative error.

To generate the CAD model the digitized data should be segmented and surfaces are generated on this segmented data cloud. For generating surfaces first of all boundary curves are defined. With the help of these boundary curves surfaces are to be generated.
 

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