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Accuracy of a reverse-engineered mould using contact and non-contact measurement techniques

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Investigations into the accuracy of computer-aided design (CAD) models for an injection mould have been carried out in this work. Taguchi design of experiments has been employed to find appropriate values for scanning parameters which result in shortest scanning time and lowest deviation between actual mould and its CAD model. CAD models obtained from point clouds captured using different scanning techniques, such as laser line scanning probe, active scanning probe and passive scanning probe attached to a bridge type CMM, have been analysed. For analysis, deviations between CAD model and actual part have been measured at a number of pre-defined points. Effect of surface roughness on the accuracy of reverse-engineered CAD model and scanning time while capturing surface coordinates using scanning touch probe has also been investigated. This investigation clearly exhibits that in case of polished surface higher accuracy for CAD model can be obtained in shorter scanning time.
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Keywords: active scanning touch probe; coordinate measuring machine; laser line scanning probe; passive scanning touch probe; reverse engineering

Document Type: Research Article

Affiliations: Princess Fatima Alnijris Research Chair for Advanced Manufacturing Technology (AMT), Department of Industrial Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia

Publication date: May 4, 2015

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