Preparation of Micro-Hole with Large Aspect Ratio

Abstract:

It was difficult to prepare micro-hole with large aspect ratio by traditional processing technologies. In order to solve the problem, a preparation was proposed. It was carried out by casting method. Carbon fiber and metal wire coated graphite paint were used as hole core respectively. And morphology and geometrical characteristic of micro-hole were observed and analyzed by scanning electron microscope and laser scanning confocal microscope. The results showed that average diameter and aspect ratio of micro-hole obtained by the group of carbon fiber hole core were about 0.2 mm and above 1700, respectively. For the other group, about 0.5 mm and 700, respectively. The micro-hole obtained by the metal wire coated graphite paint hole core was more close to circle. Its shape factor was about 0.72. The roughness of micro-hole value obtained by carbon fiber hole core was close to 3.2 μm, smaller than that of the metal wire coated graphite paint.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 1190-1194
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.1190
• Online since: June 2017
• Authors: Ying Dong Qu*, Mei Ling Jin, Jun Hua You, Rong De Li
• Keywords: Casting, Large Aspect Ratio, Micro-Hole, Roughness, Roundness

References

[1] J. van der Geer, J.A.J. Hanraads, R.A. Lupton, The art of writing a scientific article, J. Sci. Commun. 163 (2000) 51-59.

[1] J.Z. Li, G.Q. Yin, C. Wang, X.J. Gou, Z.Y. Yu, Prediction of aspect ratio of a micro hole drilled by EDM, J. Mech. Sci. Technol. 21 (2013) 185-190.

DOI: 10.1007/s12206-012-1214-9

[2] P. Parandoush, A. Hossain, A review of modeling and simulation of laser beam machining, Int. J. Mach. Tools. Manuf. 85 (2014) 135-145.

DOI: 10.1016/j.ijmachtools.2014.05.008

[3] G.Y. Yang, H.P. Tang, W.P. Jia, P. Zhao, W.W. He, Y. Huang, L. Jia, Research developments of electron beam melting technique for fabricating biomedical porous metal materials, Mater. Rev. 27 (2013) 118-122.

[4] M. Sen, H. S. Shan, A review of electrochemical macro-to micro-hole drilling processes, Int. J. Mach. Tool. Manu. (45) 2005 137-152.

[5] N. Natarajan, P. Suresh, Experimental investigations on the microhole machining of 304 stainless steel by micro-edm process using Rc-type pulse generator, Int. J. Adv. Manuf. Tech. 77 (2015) 1741-1750.

DOI: 10.1007/s00170-014-6494-z

[6] H.K. Dave, V.J. Mathai, K.P. Desai, H. K. Raval, Studies on quality of microholes generated on Al 1100 using micro-electro-discharge machining process, Int. J. Adv. Manuf. Tech. 76 (2013) 127-140.

DOI: 10.1007/s00170-013-5542-4

[7] R. Balasubramaniam, P. Ranjan, V.J. Borole, E. Kandaswamy, V.K. Suri, Effects of the condition of the tubular electrode on hole size and shape in micro deep hole electrical discharge machining, Int. J. Precision Technol. 3 (2012) 3-13.

DOI: 10.1504/ijptech.2012.045985

[8] L.N. Meng, A.H. Wang, Y. Wu, W. Xi, H.B. Xia, Y. N. Wang, Blind micro-hole array Ti6Al4V templates for carrying biomaterials fabricated by fiber laser drilling, J. Mater. Process. Tech. 222 (2015) 335-343.

DOI: 10.1016/j.jmatprotec.2015.03.016

[9] W. Wang, J. Chen, D. Li, D. Feng, Y.L. Tu, Modelling and optimisation of a femtosecond laser micro-machining process for micro-hole array products, Int. J. Adv. Manuf. Tech. 82 (2015) 1293-1303.

DOI: 10.1007/s00170-015-7105-3

[10] F.S. Jamaludin, M.F.M. Sabri, S.M. Said, Controlling parameters of focused ion beam (FIB) on high aspect ratio micro holes milling, Microsyst. Technol. 19 (2013) 1873-1888.

DOI: 10.1007/s00542-013-1912-y

[11] Y.D. Qu, M.L. Jin, G. Qin, R.D. Li, M.Q. Gao, F.S. Sun, J.H. You, Ultra-long pore fabrication process by pulling–casting in aluminum alloy, Mater. Manuf. Process. 29 (2014) 1205-1209.

DOI: 10.1080/10426914.2014.930886

[12] A. Jena, K. Gupta, Advanced technology for evaluation of pore structure characteristics of filtration media to optimize their design and performance, Porous Materials, (2002) Inc.