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

Binnur Sağbaş

doi:10.26701/ems.678901

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.

Highlights

Additive Manufacturing (AM) is a novel and rapidly developing technology that builds up physical three dimensional (3D) geometries from a computer-aided 3D model (CAD) data without any usage of molds, tools or fixtures [1]
Multi Jet Fusion (MJF) is one the new AM method which works with the principle of powder bed fusion (PBF) technology and used for polymer based AM part manufacturing [2]
There was no significant difference between two samples tooth height and nominal value

Summary

Introduction

Additive Manufacturing (AM) is a novel and rapidly developing technology that builds up physical three dimensional (3D) geometries from a computer-aided 3D model (CAD) data without any usage of molds, tools or fixtures [1]. Multi Jet Fusion (MJF) is one the new AM method which works with the principle of powder bed fusion (PBF) technology and used for polymer based AM part manufacturing [2]. It was developed by HP and commercially available since 2016 [3]. After spreading the first layer of the polymer powder over the build platform, it is heated near about sintering temperature and fusing agent deposited precisely on to the powder by inkjet nozzles in accordance with 3D geometry of manufactured part. After building step the cooling and unpacking of the manufactured part is applied in post processing unit. These two unit system provide continuing the manufacturing process and save time [4]

Methods

Results

Conclusion