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Journal of Laser Applications / Volume 24 / Issue 1 / Technical Articles

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J. Laser Appl. 24, 012007 (2012); http://dx.doi.org/10.2351/1.3673521 (8 pages)

Ultra-high speed disk laser cutting of carbon fiber reinforced plastics

Kwang-Woon Jung, Yousuke Kawahito, and Seiji Katayama

Joining and Welding Research Institute (JWRI), Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan

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(Received 02 August 2011; accepted 07 December 2011; published online 30 December 2011)

Laser cutting of carbon fiber reinforced plastics (CFRPs) has been known to be difficult due to the thermal damage to CFRP material. Therefore, with the objectives of evaluating the cutting possibility for long- or short-fiber pellet CFRP sheets of 3 mm in thickness and obtaining narrower heat affected zone (HAZ) for better cut quality, ultra-high speed cutting was conducted by using a continuous-wave high brightness disk laser. The increase in the laser power rendered the cutting time shorter and the kerf depth deeper for CFRP full cut. It was revealed that CFRP cut with narrow HAZ of less than 50 μm could be produced under the conditions of the laser powers of 2–5 kW, the cutting speed of 5 m/s, the time interval between repeated runs of 1 s, and the defocused distance of 0 mm. It was also confirmed that short fiber pellet CFRP was more easily cut and suffered less thermal damage in comparison with long fiber one. Furthermore, it was demonstrated that the tensile strength of fully laser-cut CFRP was almost equal to that of the base CFRP specimen. This means the laser-cut surfaces of the CFRP sheet were not degraded in mechanical properties.

© 2012 Laser Institute of America

KEYWORDS and PACS

Keywords

carbon fibre reinforced plastics, laser beam cutting, tensile strength, laser cutting, CFRP, ultra-high speed, heat affected zone, tensile strength

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.2351/1.3673521

PUBLICATION DATA

ISSN

1042-346X (print)  

Publisher

$abstract.society.value is a Member of CrossRef Laser Institute of America

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