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Investigation of chip formation and burr control in PCB fixture hole

Lixin Huang (Mechanical Engineering Department, Shanghai University of Engineering Science, Shanghai, China)

Circuit World

ISSN: 0305-6120

Article publication date: 5 May 2015

239

Abstract

Purpose

This paper aims to analyze their generation mechanism and factors influencing burr generation. The final goal is to use appropriate drill design and drilling process to control the generation of burrs.

Design/methodology/approach

The mechanism of burr generation was studied through finite element method (FEM) simulation and drilling experiments. High-speed photography technology and scanning electron microscope (SEM) were used in this study.

Findings

High-speed drilling burr is a printed circuit board (PCB) copper foil burr. Within a certain range, the feed speed and burr height is in positive correlation, and decrease in the feeding speed will favor the exit burr. Drill angle influences burr and chisel edge affect significantly, followed by the point angle, and helical angle has little effect. From the perspective of reducing the burr, a smaller chisel edge and smaller point angle should be chosen. Grinding chisel edge is another choice to decrease the burr but also ensures the blade strength.

Originality/value

This paper investigates the mechanism of burr generation of PCB fixture hole drilling. The process of burr generation was captured by high-speed camera. The controlling methods of burr generation were illustrated at the end.

Keywords

Acknowledgements

This work was financially supported by the Shanghai University of Engineering Science Fund (nhjx-2015-02); Shanghai Baoshan Science & Technology Innovation Fund (CXY-2012-18).

Citation

Huang, L. (2015), "Investigation of chip formation and burr control in PCB fixture hole", Circuit World, Vol. 41 No. 2, pp. 61-69. https://doi.org/10.1108/CW-09-2014-0040

Publisher

:

Emerald Group Publishing Limited

Copyright © 2015, Emerald Group Publishing Limited

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