ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Recently, a new drilling technology has been attracting attention using asuper-high-speed spindle and micro diameter drills (less than 0.2 mm). In these drilling conditions,B-RING damage extends more than internal damage around the drilled holes. Therefore, weinvestigated the best drilling conditions for control of the B-RING, considering productivity. Thefollowing conclusions were obtained. (1) The temperature of the drilling tool is raised by decreasingthe heat capacity of the drill. B-RING damage around the drilled hole is especially generated underdrilling conditions using the super-high-speed spindle and micro diameter drill. (2) B-RING ismainly caused by the heat being conducted to the hole wall of the PWB. (3) Raising the R pointheight is an effective method for preventing B-RING damage. (4) We confirm obtaining the bestdrilling condition by considering B-RING and productivity
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.389-390.55.pdf
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