This project was carried out for Superhouse Tanneries Limited, Kanpur.
This is a very good example of Part to Part inspection using Reverse Engineering. In this project a shoe-last and a shoe are to be inspected to check whether the given last is of the given shoe. Figure 4.5(a) is included to show both shoe last and shoe which were to be investigated.
Spherical probe of diameter 0.25" was used for scanning the last. Before starting surface generation, points that were scanned using spherical probe were offseted by a distance of 0.125", which is equal to the radius of spherical probe. Surface model is generated on this digitized data. Shoe was scanned using Atos optical scanner. Scanned data for the shoe last has already been shown in Figure 4.2(a) whereas in Figure 4.5(b) point cloud for shoe is shown. To register surface model of the last and point cloud of the shoe both files were opened in the same viewport and with the help of common curves registration was completed. Figure 4.5(c) is included for both the point clouds after registration. In Figure 4.5(d) wireframe surface model for shoe last and scanned data of the shoe are shown.
Surface-cloud difference is interrogated using the software. The result
of this interrogation was a colored plot representing the magnitude of
difference by different colors, which is shown in Figure 4.5(e). Even cloud-cloud
difference can be interrogated. The colored plot of the cloud-cloud difference
is shown n Figure 4.5(f). By observing the obtained colored plot, it has
been concluded that the given shoe-last is not of the given shoe since
at one cross-section the difference is less then the thickness of the upper
of the shoe.
