Investigation of dimensional accuracy of additive manufactured sample

Sharum, Mohamad Afiq (2023) Investigation of dimensional accuracy of additive manufactured sample. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

3D printing is a process of which material is solidified and joined to form a complex three dimensional object under the control of a computer. 3D printing is used in both rapid prototyping and additive manufacturing. The most common technique used for 3D printing is the Fused Deposition Modeling (FDM). The durability of the materials FDM used, the stability of their mechanical properties over time, and the quality of the parts are some of the advantages of using FDM. However, it also has several limitations for instance the appearance of seam line between layer and the formation of excess material residue on the parts surface. These limitations will affect the dimensional accuracy of the parts produced by the 3D printer. The test models were made using CATIA software and printed using the 3D printers. The metal filaments that will be used for this project is Stainless Steel, ABS and Tough PLA; the test models were tested using the Coordinate Measuring Machine (CMM). The thickness, corner radius, angle, perpendicularity, hole diameter and flatness are some of the geometries to be tested with the CMM. The result shows that none of the filaments are able to obtain 100% result accuracy although Stainless Steel managed to reach the closest value to the expected data. These data are then studied to identify the problems which have led to several factors such as shrinkage and geometry complexities. The optimum parameters for printed FDM sample can be used in order to achieve better dimensional accuracy for future production.

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