TY - GEN
T1 - The study of high speed micro-drilling performance and machining quality of coated micro-drills with Zr-C:H coatings
AU - Kao, W. H.
AU - Su, Y. L.
AU - Yao, S. H.
AU - Huang, H. C.
AU - Chen, M. S.
PY - 2012
Y1 - 2012
N2 - The Zr-C:H coatings with various C2H2 flow rate were deposited on micro-drills (a diameter of 0.2 mm) used a closed field unbalanced magnetron sputtering system. The ultrahigh speed (drilling speed of 160000 rpm) through-hole drilling printed circuit board tests used to evaluate the drilling performance of the coated micro-drills. The rejection criteria of service lives of the coated micro-drills were evaluated using two different criteria: (1) a nail head ratio greater than 1.5; (2) a drilled hole surface roughness greater than 25.4 μm. Adopting a service life criterion of a nail head ratio of 1.5, the Zr-C:H-5 coating possesses the optimal high-speed machining performance, which yields a micro-drill lifetime of above 6000 drilled holes. It represents a three-fold improvement on that of an uncoated micro-drill and it also improves machining quality.
AB - The Zr-C:H coatings with various C2H2 flow rate were deposited on micro-drills (a diameter of 0.2 mm) used a closed field unbalanced magnetron sputtering system. The ultrahigh speed (drilling speed of 160000 rpm) through-hole drilling printed circuit board tests used to evaluate the drilling performance of the coated micro-drills. The rejection criteria of service lives of the coated micro-drills were evaluated using two different criteria: (1) a nail head ratio greater than 1.5; (2) a drilled hole surface roughness greater than 25.4 μm. Adopting a service life criterion of a nail head ratio of 1.5, the Zr-C:H-5 coating possesses the optimal high-speed machining performance, which yields a micro-drill lifetime of above 6000 drilled holes. It represents a three-fold improvement on that of an uncoated micro-drill and it also improves machining quality.
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U2 - 10.4028/www.scientific.net/AMR.591-593.342
DO - 10.4028/www.scientific.net/AMR.591-593.342
M3 - Conference contribution
AN - SCOPUS:84871034705
SN - 9783037855362
T3 - Advanced Materials Research
SP - 342
EP - 346
BT - Manufacturing Engineering and Automation II
T2 - 2012 International Conference on Manufacturing Engineering and Automation, ICMEA 2012
Y2 - 16 November 2012 through 18 November 2012
ER -