Measurement of Micro-Drill Breakage during PCB Drilling

Abstract:

Due to the weak rigidity of micro-drills and impulse effects, the micro-drill breakage is a common problem in printed circuit board micro-drilling. Traditional micro-drill breakage detection methods and principles, including vacuum-type, laser-type, and contact-type detection, were reviewed in this paper. The comparison of three detection methods showed that the contact-type detection can more satisfy the performance of CNC drilling machine. Three effective contact-detection circuits, including no transformer and rectifier circuit pulse-type, active-type, and trigger-type detection circuit, were introduced. And as a conclusion, differences of these detection methods were compared. Based on the characteristic of three effective micro-drill breakage contact detection circuits, the development trends and designs of innovative detection circuit were proposed to meet the challenges in micro-drill breakage measurement during PCB drilling.

• Periodical: Materials Science Forum (Volumes 836-837)
• Pages: 592-599
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.836-837.592
• Online since: January 2016
• Authors: Xin Huang, Zhi Shun Chen, Cheng Yong Wang*, Li Juan Zheng, Yue Xian Song
• Keywords: Detection Methods, Micro Drill Bit Contact Detection, Micro Drill Breakage, PCB

References

[1] L.J. Zheng, C.Y. Wang, Y.X. Song, et al. A Review on Drilling Printed Circuit Boards, Advanced Materials Research, 2011(188): 441-449.

DOI: 10.4028/www.scientific.net/amr.188.441

[2] Q.X. Zhai, M.X. Du, Analysis of micro-drilling and its test method in PCB industry, Printed Circuit Information, 2013. No. 7.

[3] Y. X Song, B. Wang, C.Y. Wang, Study of Principles and Methods of High Speed PCB NC Drilling Machine Design, Mechanical & Electrical Engineering Technology, 2014, (5).

[4] Z.J. Yang, W. Li, Y.H. Chen, et al, Study for increasing micro-drill reliability by vibrating drilling[J], Reliability Engineering & System Safety, 1998, 61(3): 229-233.

DOI: 10.1016/s0951-8320(98)00004-0

[5] Y.P. Qu, Study on failure mechanism of micro drill used to drill the Printed Circuit Board, Guangzhou: Guangdong University of technology, (2012).

[6] D.K. Ding, Research on PCB Micro-drill Detection by Machine Vision Based on Genetic Algorithm, Machine Tool & Hydraulics, 2013, 41(15).

[7] H. Hong, Research on online detection of drill-breakage, Mechanical & Electrical Technology, (2009).

[8] Z.J. Yang, Y.H. Chen, Y.H. Yang, Study on the life distribution of micro-drill, Proc. Instn Mech. Engrs, Part B : Engineering Manufacture, 2002, 216(B3): 301-305.

[9] J. Erkki, A summary of methods applied to tool condition monitoring in drilling, International Journal of Machine Tools & Manufacture, 2002, 42(9): 997-1010.

DOI: 10.1016/s0890-6955(02)00040-8

[10] H.Q. Tang, C.Y. Wang, The detected Technology of micro Holes, The Magazine of Machine tool & Hydraulics, 2010, 8, 38(16): 1-5.

[11] C. Ma, Design of needle-contact broken drill detection, University of Electronic Science and Technology of China, 2012. 4.

[12] Y.H. Zhou, G.Y. Deng, The broken needle contact system of CNC PCB drilling machine, China Invention patent, Patent No: ZL 200810066853. X, 2008. 4. 25.

[13] Q.F. Zhou, W.C. Fang, T.S. Lu, A triggering broken needle detection device and method of PWB, China Invention patent, Patent No: CN 103522124 A.

[14] X. Jiakui, Electronic circuit (the fourth edition), Beijing: Higher Education Press, 2000. 5(51-70).

[15] S.S. Xu, Signal and system (the second edition), Hefei: The Press of China Science &Technology University, 2006. 3(168-175).