Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지
DOI QR코드

DOI QR Code

Measurements of Defects after Machining CFRP Holes Using High Speed Line Scan

고속 라인 스캔 방식을 이용한 CFRP 가공 홀 표면 및 내부 결함 검사

  • Received : 2016.05.09
  • Accepted : 2016.05.27
  • Published : 2016.06.03
Download PDF
⟨ Previous Next ⟩

Abstract

Using a line scan camera and a Galvano mirror, we constructed a high-speed line-scanning microscope that can generate 2D images ($8000{\times}8000pixels$) without any moving parts. The line scanner consists of a Galvano mirror and a cylindrical lens, which creates a line focus that sweeps over the sample. The measured resolutions in the x (perpendicular to line focus) and y (parallel to line focus) directions are both $2{\mu}m$, with a 2X scan lens and a 3X relay lens. This optical system is useful for measuring defects, such as spalling, chipping, delamination, etc., on the surface of carbon fiber reinforced plastic (CFRP) holes after machining in conjunction with adjustments in the angle of LED lighting. Defects on the inner wall of holes are measured by line confocal laser scanning. This confocal method will be useful for analyzing defects after CFRP machining and for fast 3D image reconstruction.

Keywords

References

  1. Zhang, H. J., Chen, W. Y., Chen, D. C., and Zhang, L. C., "Assessment of the Exit Defects in Carbon Fiber-Reinforced Plastic Plates Caused by Drilling," Key Engineering Materials, Vol. 196, pp. 43-52, 2001. https://doi.org/10.4028/www.scientific.net/KEM.196.43
  2. Faraz, A., Biermann, D., and Weinert, K., "Cutting Edge Rounding: An Innovative Tool wear Criterion in Drilling CFRP Composite Laminates," International Journal of Machine Tools &Manufacture, Vol. 49, No. 15, pp. 1185-1196, 2009. https://doi.org/10.1016/j.ijmachtools.2009.08.002
  3. Lachaud, F., Piquet, R., Collmbet, F., and Surcin, L., "Drilling of Composite Structure," Composite Structures, Vol. 52, No. 3-4, pp. 511-516, 2001. https://doi.org/10.1016/S0263-8223(01)00040-X
  4. Shyha, I., Soo, S. L., Aspinwall, D., and Bradley, S., "Effect of Laminate Configuration and Feed Rate on Cutting Performance When Drilling Holes in Carbon Fiber Reinforced Plastic Composites," Journal of Materials Processing Technology, Vol. 210, No. 8, pp. 1023-1034, 2010. https://doi.org/10.1016/j.jmatprotec.2010.02.011
  5. Durao, L. M. P., Goncalves, D. J. S., Tavares, J. M. R. S., Albuquerque, V. H. C., Vieira, A. A., et al., "Drilling Tool Geometry Evaluation for Reinforced Composite Laminates," Composite Structures, Vol. 92, No. 7, pp. 1545-1550, 2010. https://doi.org/10.1016/j.compstruct.2009.10.035
  6. Feito, N., Diaz-Alvarez, A., Cantero, J. L., and Miguelez, H., "Experimental Analysis of Special Tool Geometries When Drilling Woven and Multidirectional CFRPs," Journal of Reinforced Plastics and Composites, Vol. 35, No. 1, pp. 33-55, 2016. https://doi.org/10.1177/0731684415612931
  7. Lin, P. C., Sun, P.-C., and Fainman, Y., "Single-Shot Depth-Section Imaging through Chromatic Slit-Scan Confocal Microscopy," Applied Optics, Vol. 37, No. 28, pp. 6764-6770, 1998. https://doi.org/10.1364/AO.37.006764
  8. Im, K-B., Han, S., Park, H., Kim D., and Kim, B-M., "Simple High-Speed Confocal Line-Scanning Microscope," Optics Express, Vol. 13, No. 13, pp. 5151-5156, 2005. https://doi.org/10.1364/OPEX.13.005151
  9. Sheppard, C. J. R. and Mao, X. Q., "Confocal Microscopes with Slit Apertures," Journal of Modem Optics, Vol. 35, No. 7, pp. 1169-1185, 1988. https://doi.org/10.1080/09500348814551251
  10. Botcherby, E. J., Booth, M. J., and Wilson, T., "Real-Time Slit Scanning Microscopy in the Meridional Plane," Optics Letters, Vol. 34, No. 10, pp. 1504-1506, 2005. https://doi.org/10.1364/OL.34.001504

Cited by

  1. Effect of Dome Curvature on Failure Mode of Type4 Composite Pressure Vessel vol.19, pp.3, 2018, https://doi.org/10.1007/s12541-018-0048-5