Dimensional Variability Analysis ln Post-Processing Of Rapid Tooling

Abstract

Rapid tooling for sand casting can be made by creating pattern with elements made by solid freeform fabrication (SFF) devices. Using this approach, post-processing and hand finishing remain as necessary steps to improve the surface finish quality of the pattern. For rapid·.tooling using laminated object manufacturing (LOM) models, post-processing includes decubing, sanding and sealing followed by integration with a match plate and/or conventional cope & drag pattern elements. Since the critical finishing operations are intensively manual, it is difficult to estimate the dimensional capability of rapid tooling by.LaM process. The Objective of this paper is to use statistics to evaluate dimensional variability associated with postprocessing using the accepted industry best practice.