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Predictive modeling of geometric deviations of 3D printed products - A unified modeling approach for cylindrical and polygon shapes | IEEE Conference Publication | IEEE Xplore

Predictive modeling of geometric deviations of 3D printed products - A unified modeling approach for cylindrical and polygon shapes


Abstract:

Geometric fidelity of 3D printed products is critical for Additive Manufacturing (AM) or 3D printing to be a direct manufacturing technology. Shape deviations of AM built...Show More

Abstract:

Geometric fidelity of 3D printed products is critical for Additive Manufacturing (AM) or 3D printing to be a direct manufacturing technology. Shape deviations of AM built products can be attributed to multiple variation sources such as substrate geometry defect, disturbance in process variables, and material phase change. Three strategies have been reported to improve geometric quality in AM: (1) control process variables x based on the observed disturbance of process variables Δx, (2) control process variables x based on the observed product deviation Δy, and (3) control input product geometry y based on the observed product deviation Δy. This study adopts the third strategy which changes the CAD design by optimally compensating the product deviations. To accomplish the goal an predictive model is desirable to forecast the quality of a wide class of product shapes, particularly considering the vast library of AM built products with complex geometry. Built upon our previous optimal compensation study of cylindrical products, this work aims at an unified modeling approach to predict the quality of both cylinder and polygon shapes. Experimental investigation of polygon shapes indicates the promise of predicting and compensating a wide class of products built through 3D printing technology.
Date of Conference: 18-22 August 2014
Date Added to IEEE Xplore: 30 October 2014
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ISSN Information:

Conference Location: New Taipei, Taiwan

I. Introduction

Additive manufacturing (AM) or 3D printing directly fabricates physical products from a 3D CAD model by layered manufacturing processes. Since AM adds material layer by layer to construct products, this technique theoretically enables the direct printing of products with extremely complex geometry. Geometric complexity does not affect building efficiency, and no extra effort is necessary for molding construction or fixture tooling design, making 3D printing one of the most promising manufacturing techniques [1]–[4].

References

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