Towards in-situ process monitoring in selective laser sintering using optical coherence tomography

Guangying Guan; Zeng H. Lu; Matthias Hirsch; Ruth Goodridge; David T.D. Childs; Stephen J. Matcher; Adam T. Clare; Kristian M. Groom

doi:10.1117/12.2210992

Towards in-situ process monitoring in selective laser sintering using optical coherence tomography

Guangying Guan, Zeng H. Lu, Matthias Hirsch, Ruth Goodridge, David T.D. Childs, Stephen J. Matcher, Adam T. Clare, Kristian M. Groom

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Citations (Scopus)

Abstract

Selective laser sintering (SLS) enables fast, flexible and cost-efficient production of parts directly from 3D CAD data. However, compared with more established machine tools, there is a marked lack of process monitoring and feedback control of key process variables to optimize production parameters in-situ. We apply optical coherence tomography (OCT) to evaluate components produced by SLS and suggest a route for its application in in-situ process monitoring within the SLS tool for real-time monitoring of the SLS process for assurance, or even dynamic correction of defects during the build. OCT is shown to be a viable technique for evaluation of both surface and sub-surface features built into a part either by design or from poor sintering or non-homogeneous powder spreading. We demonstrate detection and quantification of surface defects on a ∼30 μm scale in a Polyamide (PA2200) part, resolving 'built-in' fine features within a 200 to 400μm depth below the surface.

Original language	English
Title of host publication	Laser 3D Manufacturing III
Editors	Bo Gu, Henry Helvajian, Alberto Piqué
Publisher	SPIE
Number of pages	9
Volume	9738
ISBN (Print)	9781628419733
DOIs	https://doi.org/10.1117/12.2210992
Publication status	Published - 6 Apr 2016
Externally published	Yes
Event	Laser 3D Manufacturing III - San Francisco, United States Duration: 13 Feb 2016 → 18 Feb 2016 Conference number: 3

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	9738
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Laser 3D Manufacturing III
Country/Territory	United States
City	San Francisco
Period	13/02/16 → 18/02/16

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Guan, G., Lu, Z. H., Hirsch, M., Goodridge, R., Childs, D. T. D., Matcher, S. J., Clare, A. T., & Groom, K. M. (2016). Towards in-situ process monitoring in selective laser sintering using optical coherence tomography. In B. Gu, H. Helvajian, & A. Piqué (Eds.), Laser 3D Manufacturing III (Vol. 9738). Article 97380Q (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9738). SPIE. https://doi.org/10.1117/12.2210992

@inproceedings{f0489285861740988ddc0088a2174426,

title = "Towards in-situ process monitoring in selective laser sintering using optical coherence tomography",

abstract = "Selective laser sintering (SLS) enables fast, flexible and cost-efficient production of parts directly from 3D CAD data. However, compared with more established machine tools, there is a marked lack of process monitoring and feedback control of key process variables to optimize production parameters in-situ. We apply optical coherence tomography (OCT) to evaluate components produced by SLS and suggest a route for its application in in-situ process monitoring within the SLS tool for real-time monitoring of the SLS process for assurance, or even dynamic correction of defects during the build. OCT is shown to be a viable technique for evaluation of both surface and sub-surface features built into a part either by design or from poor sintering or non-homogeneous powder spreading. We demonstrate detection and quantification of surface defects on a ∼30 μm scale in a Polyamide (PA2200) part, resolving 'built-in' fine features within a 200 to 400μm depth below the surface.",

keywords = "AM, in-situ monitoring, OCT, Selective Laser Sintering, Optical coherence tomography, Laser sintering, Manufacturing, Solids, Additive manufacturing, Particles, Polymers, Signal attenuation, Computer aided design, Process control",

author = "Guangying Guan and Lu, {Zeng H.} and Matthias Hirsch and Ruth Goodridge and Childs, {David T.D.} and Matcher, {Stephen J.} and Clare, {Adam T.} and Groom, {Kristian M.}",

note = "Publisher Copyright: {\textcopyright} 2016 SPIE.; Laser 3D Manufacturing III ; Conference date: 13-02-2016 Through 18-02-2016",

year = "2016",

month = apr,

day = "6",

doi = "10.1117/12.2210992",

language = "English",

isbn = "9781628419733",

volume = "9738",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

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Guan, G, Lu, ZH, Hirsch, M, Goodridge, R, Childs, DTD, Matcher, SJ, Clare, AT & Groom, KM 2016, Towards in-situ process monitoring in selective laser sintering using optical coherence tomography. in B Gu, H Helvajian & A Piqué (eds), Laser 3D Manufacturing III. vol. 9738, 97380Q, Proceedings of SPIE - The International Society for Optical Engineering, vol. 9738, SPIE, Laser 3D Manufacturing III, San Francisco, California, United States, 13/02/16. https://doi.org/10.1117/12.2210992

Towards in-situ process monitoring in selective laser sintering using optical coherence tomography. / Guan, Guangying; Lu, Zeng H.; Hirsch, Matthias et al.
Laser 3D Manufacturing III. ed. / Bo Gu; Henry Helvajian; Alberto Piqué. Vol. 9738 SPIE, 2016. 97380Q (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9738).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Towards in-situ process monitoring in selective laser sintering using optical coherence tomography

AU - Guan, Guangying

AU - Lu, Zeng H.

AU - Hirsch, Matthias

AU - Goodridge, Ruth

AU - Childs, David T.D.

AU - Matcher, Stephen J.

AU - Clare, Adam T.

AU - Groom, Kristian M.

N1 - Conference code: 3

PY - 2016/4/6

Y1 - 2016/4/6

N2 - Selective laser sintering (SLS) enables fast, flexible and cost-efficient production of parts directly from 3D CAD data. However, compared with more established machine tools, there is a marked lack of process monitoring and feedback control of key process variables to optimize production parameters in-situ. We apply optical coherence tomography (OCT) to evaluate components produced by SLS and suggest a route for its application in in-situ process monitoring within the SLS tool for real-time monitoring of the SLS process for assurance, or even dynamic correction of defects during the build. OCT is shown to be a viable technique for evaluation of both surface and sub-surface features built into a part either by design or from poor sintering or non-homogeneous powder spreading. We demonstrate detection and quantification of surface defects on a ∼30 μm scale in a Polyamide (PA2200) part, resolving 'built-in' fine features within a 200 to 400μm depth below the surface.

AB - Selective laser sintering (SLS) enables fast, flexible and cost-efficient production of parts directly from 3D CAD data. However, compared with more established machine tools, there is a marked lack of process monitoring and feedback control of key process variables to optimize production parameters in-situ. We apply optical coherence tomography (OCT) to evaluate components produced by SLS and suggest a route for its application in in-situ process monitoring within the SLS tool for real-time monitoring of the SLS process for assurance, or even dynamic correction of defects during the build. OCT is shown to be a viable technique for evaluation of both surface and sub-surface features built into a part either by design or from poor sintering or non-homogeneous powder spreading. We demonstrate detection and quantification of surface defects on a ∼30 μm scale in a Polyamide (PA2200) part, resolving 'built-in' fine features within a 200 to 400μm depth below the surface.

KW - AM

KW - in-situ monitoring

KW - OCT

KW - Selective Laser Sintering

KW - Optical coherence tomography

KW - Laser sintering

KW - Manufacturing

KW - Solids

KW - Additive manufacturing

KW - Particles

KW - Polymers

KW - Signal attenuation

KW - Computer aided design

KW - Process control

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U2 - 10.1117/12.2210992

DO - 10.1117/12.2210992

M3 - Conference contribution

AN - SCOPUS:84981163086

SN - 9781628419733

VL - 9738

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Laser 3D Manufacturing III

A2 - Gu, Bo

A2 - Helvajian, Henry

A2 - Piqué, Alberto

PB - SPIE

T2 - Laser 3D Manufacturing III

Y2 - 13 February 2016 through 18 February 2016

ER -

Towards in-situ process monitoring in selective laser sintering using optical coherence tomography

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UN SDGs

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