Abstract
This paper represents the influence of drilling conditions upon centripetal action with radial run-out in the micro drilling of printed circuit boards (PCBs). These were examined experimentally with micro drills of 0.1mm in diameter at a rotational speed of 3 x 105/min. The drilling behavior around contact area on a work surface was observed by a high-speed video camera. The conclusions obtained are as follows: 1) The centripetal action varies with physical properties of work material. The centripetal action is deteriorative in harder work material. 2) The centripetal action depends on feed rate. It is more effective at a lower feed rate, but doesn't depend on the geometry of drill tips. 3) Drilled hole quality is dependent on bending stiffness of a micro drill. The hole quality deteriorates at a higher bending stiffness.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Japan Society for Precision Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
