Practical support structures for selective laser melting
Support structure is an essential part in the selective laser melting process which are built especially in cases where reorientation does not eliminate overhanging features. These structures function as anchors, dissipate heat and prevent thermal warping of the parts. However, the materials used fo...
Saved in:
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://hdl.handle.net/10356/88195 http://hdl.handle.net/10220/44556 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-88195 |
---|---|
record_format |
dspace |
spelling |
sg-ntu-dr.10356-881952020-03-07T12:47:08Z Practical support structures for selective laser melting Gan, Ming Xuan Wong, Chee How School of Mechanical and Aerospace Engineering Singapore Centre for 3D Printing Support Structures Selective Laser Melting Support structure is an essential part in the selective laser melting process which are built especially in cases where reorientation does not eliminate overhanging features. These structures function as anchors, dissipate heat and prevent thermal warping of the parts. However, the materials used for the support structures are often discarded resulting in an increase in manufacturing time and costs. Therefore, this study explores three types of support structures to help design practical supports. As the levelness of each layer is critical in layered manufacturing process, experiments and finite element analysis were conducted to investigate the design effects on manufacturing thin plates and cuboids. The results revealed that the orientation and distribution of the support structures influence the levelness of the built part. Uniformly spaced vertical struts, of only 2.2% overhang-support contact area, enables fabrication of relatively levelled thin plates. Finite element analysis also showed that unequally spaced support structures changes the heat dissipation pattern in the thin plate which can lead to thermal distortions. The results also indicated that the angle between the support structures and the shrinkage direction of more than 90 ° prevents upward thermal warpages. 2018-03-14T09:14:49Z 2019-12-06T16:58:08Z 2018-03-14T09:14:49Z 2019-12-06T16:58:08Z 2016 Journal Article Gan, M. X., & Wong, C. H. (2016). Practical support structures for selective laser melting. Journal of Materials Processing Technology, 238, 474-484. 0924-0136 https://hdl.handle.net/10356/88195 http://hdl.handle.net/10220/44556 10.1016/j.jmatprotec.2016.08.006 en Journal of Materials Processing Technology © 2016 Elsevier. |
institution |
Nanyang Technological University |
building |
NTU Library |
country |
Singapore |
collection |
DR-NTU |
language |
English |
topic |
Support Structures Selective Laser Melting |
spellingShingle |
Support Structures Selective Laser Melting Gan, Ming Xuan Wong, Chee How Practical support structures for selective laser melting |
description |
Support structure is an essential part in the selective laser melting process which are built especially in cases where reorientation does not eliminate overhanging features. These structures function as anchors, dissipate heat and prevent thermal warping of the parts. However, the materials used for the support structures are often discarded resulting in an increase in manufacturing time and costs. Therefore, this study explores three types of support structures to help design practical supports. As the levelness of each layer is critical in layered manufacturing process, experiments and finite element analysis were conducted to investigate the design effects on manufacturing thin plates and cuboids. The results revealed that the orientation and distribution of the support structures influence the levelness of the built part. Uniformly spaced vertical struts, of only 2.2% overhang-support contact area, enables fabrication of relatively levelled thin plates. Finite element analysis also showed that unequally spaced support structures changes the heat dissipation pattern in the thin plate which can lead to thermal distortions. The results also indicated that the angle between the support structures and the shrinkage direction of more than 90 ° prevents upward thermal warpages. |
author2 |
School of Mechanical and Aerospace Engineering |
author_facet |
School of Mechanical and Aerospace Engineering Gan, Ming Xuan Wong, Chee How |
format |
Article |
author |
Gan, Ming Xuan Wong, Chee How |
author_sort |
Gan, Ming Xuan |
title |
Practical support structures for selective laser melting |
title_short |
Practical support structures for selective laser melting |
title_full |
Practical support structures for selective laser melting |
title_fullStr |
Practical support structures for selective laser melting |
title_full_unstemmed |
Practical support structures for selective laser melting |
title_sort |
practical support structures for selective laser melting |
publishDate |
2018 |
url |
https://hdl.handle.net/10356/88195 http://hdl.handle.net/10220/44556 |
_version_ |
1681048380534423552 |