Research of close-loop control of molten pool temperature during laser cladding process based on color CCD

SUN Huajie; SHI Shihong; SHI Tuo; FU Geyan; CHEN Lei

doi:10.7510/jgjs.issn.1001-3806.2018.06.004

LASER TECHNOLOGY > 2018 > 42(6): 745-750. > DOI: 10.7510/jgjs.issn.1001-3806.2018.06.004

SUN Huajie, SHI Shihong, SHI Tuo, FU Geyan, CHEN Lei. Research of close-loop control of molten pool temperature during laser cladding process based on color CCD[J]. LASER TECHNOLOGY, 2018, 42(6): 745-750. DOI: 10.7510/jgjs.issn.1001-3806.2018.06.004

Citation:

PDF (6260 KB)

Research of close-loop control of molten pool temperature during laser cladding process based on color CCD

1.
School of Mechanical and Electric Engineering, Soochow University, Suzhou 215021, China
2.
School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China

More Information

Received Date: January 28, 2018
Revised Date: March 11, 2018
Published Date: November 24, 2018

Graphical Abstract

Abstract

Abstract

In order to maintain the molten pool temperature relatively stable in laser cladding process, close-loop control of molten pool temperature was realized by the combination of colorimetric temperature measurement and proportional-integral-differential (PID) control strategy. A set of on-line measurement and control system for molten pool temperature of laser cladding based on dual-channel color CCD was built. Emissivity ε was incorporated into the undetermined coefficient K, and the corresponding relationship between gray ratio and K was established, and the calculating formula for the temperature of the molten pool was derived. Based on Socket communication, the signal transmission between industrial personal computer and robot controller was realized, and the algorithm of temperature controller based on laser power variation was designed. The experimental results show that, the system can measure and control the temperature of molten pool in real time and accurately, the control accuracy within 3%. The system is applied to thin-walled cylinder stacking forming experiment, which can effectively eliminate the temperature accumulation effect during laser cladding forming process. The difference between the outer diameter of the bottom and top part of the forming part is only 0.9mm. The control scheme has the advantages of good real-time performance, low cost and easy integration.
- laser technique,
- colorimetric thermometry,
- molten pool temperature,
- close-loop control

FullText(HTML)

References (22)

References

[1]	CHOI J, CHANG Y. Characteristics of laser aided direct metal/material deposition process for tool steel[J]. Internationnal Journal of Mchine Tools and Manufacture, 2005, 45(4):597-607. http://www.sciencedirect.com/science/article/pii/S089069550400197X
[2]	MAZUDER J, DUTTA D, KIKUCHI N, et al. Closed loop direct metal deposition:art to part[J]. Optics and Lasers in Engineering, 2000, 34(4):397-414. http://www.sciencedirect.com/science/article/pii/S0143816600000725
[3]	HUANG W D. Laser solid forming techlogy:Rapid freeform fabrication of hign performance and compact metallic component[M]. Xi'an:Northwestern Polytechnical University Press, 2007:1-4(in Chin-ese).
[4]	DU Q, HANG X L, WANG M D, et al. Mechanism and experimental study of laser milling on laser cladding parts[J].Laser & Optoelectronics Progress, 2015, 52(10):101403(in Chinese).
[5]	JIANG Y J, LU B H, FANG X W, et al. 3-D printing-based internet collect-manufacturing mode[J]. Computer Integrated Manufacturing System, 2016, 22(6):1424-1433(in Chinese). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=jsjjczzxt201606005
[6]	SHI T, LU B H, WEI Zh Y, et al. Research of closed-loop control of deposition height in laser metal deposion[J]. Chinese Journal of Lasers, 2017, 44(7):0702004(in Chinese). DOI: 10.3788/CJL
[7]	SONG L, BAGAVATH-SINGH V, DUTTA B, et al. Control of melt pool temperature and deposition height during direct metal deposition process[J]. International Journal of Advanced Manufacturing Technology, 2012, 58(1/4):247-256. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=e131b322edd303794ad9f35bf07a6806
[8]	TAN H. Temperature measurement and research on microstructure contronling in laser rapid forming[D].Xi'an: Northwestern Polytechnical University, 2005: 38-57(in Chinese).
[9]	CHEN Zh. Temperature measurement of motlen pool in laser cladding process[D]. Suzhou: Soochow University, 2006: 31-48(in Chin-ese).
[10]	JIANG Sh J, LIU W J. Study on real-time measurement for laser molten pool temperature field by images colorimetric method[J]. Information and Control, 2008, 37(6):747-751(in Chinese). http://en.cnki.com.cn/Article_en/CJFDTOTAL-XXYK200806021.htm
[11]	LEI J B, YANG X Ch, WANG Y Sh, et al. Research on model of measuring and controling temperature fields of molten pool in laser remanufacturing[J]. Tianjin Polytechnic University, 2003, 22(5):56-58(in Chinese). http://en.cnki.com.cn/Article_en/CJFDTotal-TJFZ200305015.htm
[12]	LEI J B, YANG X Ch, CHEN J, et al. Study on design of laser molten pool temperature field measurement software by CCD[J]. Applied Laser, 2007, 27(1):5-8(in Chinese). http://en.cnki.com.cn/article_en/cjfdtotal-yyjg200701001.htm
[13]	BI G J, SCHVRMANN B, GASSER A, et al. Development and qualification of a novel laser-cladding head with integrated sensors[J]. International Journal of Machine Tools & Manufacture, 2007, 47(3):555-561. http://www.sciencedirect.com/science/article/pii/S0890695506001404
[14]	HU D, KOVACEVIC R. Sensing, modeling and control for laser-based additive manufacturing[J]. International Journal of Machine Tools & Manufacture, 2003, 43(1):51-60. http://www.sciencedirect.com/science/article/pii/S0890695502001633
[15]	TOYSERKANI E, KHAJEPOUR A. A Mechatronics approach to laser powder deposition process[J]. Mechatronics, 2006, 16(10):631-641. DOI: 10.1016/j.mechatronics.2006.05.002
[16]	WANG C, SHI Sh H, FANG Q Q, et al. Research on laser cladding forming of close-paked multivariant twisty thin-wall parts[J]. Chin-ese Journal of Lasers, 2017, 44(6):0602004(in Chinese). DOI: 10.3788/CJL
[17]	DENG Zh Q, SHI Sh H, ZHOU B, et al. Laser cladding forming of arcuate cantilevered entity part[J]. Infrared and Laser Engineering, 2017, 46(10):1006004(in Chinese). DOI: 10.3788/IRLA
[18]	SHI T, WANG Y Q, LU B H, et al. Laser cladding forming of cantilevered thin-walled part based on hollow-laser beam inside powder feeding technology[J]. Chinese Journal of Lasers, 2015, 42(10):1003003(in Chinese). DOI: 10.3788/CJL
[19]	XU J M, PAN X F. Research of robot monitoring system based on socket communication[J]. Computer Measurement & Control, 2017, 25(7):70-73(in Chinese). http://www.en.cnki.com.cn/Article_en/CJFDTotal-JZCK201707018.htm
[20]	HUANG J, ZHANG K, ZHU X P, et al. Calibration of CCD temperature measurement system based on RGB digital filtering in laser cladding[J]. Journal of Optoelectronnics·Laser, 2013, 24(5):968-973(in Chinese).
[21]	LI J J. An intensity fusion method applied to color CCD-based coloricmetric temperature measurement[J]. Computer Measurement & Control, 2012, 20(1):177-179(in Chinese).
[22]	MENG W D, SHI Sh H, FU G Y, et al. Experimental study about vertical surface accumulation with coaxial inside-beam power feeding[J]. Laser Technology, 2015, 39(5):594-597(in Chinese). http://www.en.cnki.com.cn/Article_en/CJFDTOTAL-JGJS201505003.htm

Cited By

Get Citation

PDF

XML

Article views (5) PDF downloads (9)

Turn off MathJax

Article Contents

Abstract

References

Research of close-loop control of molten pool temperature during laser cladding process based on color CCD

Abstract

References

Catalog

Links：

Research of close-loop control of molten pool temperature during laser cladding process based on color CCD

Abstract

References

Catalog

Links：

Export File

Citation

Format

Content