Effect of Orientation Angle on Surface Quality and Dimensional Accuracy of Functional Parts Manufactured by Multi Jet Fusion Technology

Abstract

Multi Jet Fusion (MJF) is one the new Additive Manufacturing (AM) method which belongs to powder bed fusion technology class and used for additive manufacturing of polymer based parts. There are restricted number of research about this developing technology. In this study, it is aimed to investigate the effect of build orientation angle on surface quality and dimensional accuracy of the printed bolts as functional parts. Samples were manufactured in two different build orientation such as 90 and 45 degrees. Surface quality and dimensional properties of the bolt tooth such as tooth height, tooth angle and distance between two teeth were inspected by optical and tactile precision measurement systems. The results were evaluated by comparing the measurement data with each other for two different sample groups and also with nominal design data. For determining the significance of the difference between two sample groups and nominal data the results were also evaluated by Student’s t-test statistical analysis. The results revealed that, orientation angle had significant effect on surface roughness, tooth height and tooth angle but it didn’t affect the distance between two teeth.

Keywords

• Additive Manufacturing,Optical Metrology,Multi Jet Fusion,Polyamide

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