A Study of the BTA Deep Drilling Process through a Quantitative and Qualitative Analysis of the Chip Formation Process

Abstract:

This paper deals with the analysis of the cutting process in the BTA (Boring Trepanning Association) deep hole drilling. The process is a major technique of drilling when the machining with a conventional tool is not possible. Poor training and/or poor chips evacuation often cause a temperature rise and excessive wear detrimental to the tool life and the dimensional stability of machined parts. The process is relatively not explored enough, because it is difficult to instrument experimental tests (measurement of forces acting at each insert of the BTA drilling tool, temperature at each cutting edge…). Moreover, the thermomechanical phenomena related to the cut are localized at the end of the BTA drilling head and confined in a zone inaccessible to the observation. Hence, a study of this process based on a scientific approach has been proposed. The evaluation of the chips morphology has been performed. Indeed, it is a good indicator of the stability of the cutting process and it can therefore be a serious help in the selection of optimal cutting parameters. Adequate parameters are proposed to highlight the impact of cutting conditions on the cutting process. Macro and microscopic observations of generated chips under several cutting conditions are performed. Fragmentation and segmentation of chips are some examples of analysed phenomena. In this sense, experimental tests have been conducted. The chips have been sorted according to their morphology and identified according to their origin and then proposed physical parameters are assessed. The quantitative and qualitative analysis of chips allowed identifying the impact of the cutting speed and feed rate on the cutting process.

• Periodical: Key Engineering Materials (Volumes 554-557)
• Pages: 1992-2008
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.554-557.1992
• Online since: June 2013
• Authors: Badis Haddag, Julien Thil, Mohammed Nouari, Claude Barlier
• Keywords: BTA Deep Drilling, Chip Fragmentation, Chip Morphology, Experimental Tests, Quantitative Analysis

References

[1] R. Richardson, R. Bhatti, A review of research into the role of guide pads in BTA deep-hole machining, Journal of Materials Processing Technology 110 (2001) 61-69.

DOI: 10.1016/s0924-0136(00)00733-0

[2] J. Jung, J. Ni, Prediction of coolant pressure and volume flow rate in the gundrilling process, Journal of manufacturing science and engineering 125 (2003) 696-702.

DOI: 10.1115/1.1621427

[3] J. Frazao, S. Chandrashekhar, M.O.M. Osman, T.S. Sankar, On the design and development of a new BTA Tool to increase productivity and workpiece accuracy in deep hole machining, The International Journal of Advanced Manufacturing Technology 1 (1986) 3-23.

DOI: 10.1007/bf02601457

[4] B.J. Griffiths, An investigation into the role of the burnishing pads in the deep hole drilling process, Ph.D thesis of Brunel University (1982).

[5] B.J. Griffiths, Deep hole drilling and boring, The prod. Eng. (1975) 98-105.

[6] K. Sakuma, K. Taguchi, A. Katsuki, H. Takeyama, Self guiding action of deep hole drilling tools, Ann. CIRP 30 (1981) 311-315.

DOI: 10.1016/s0007-8506(07)60948-2

[7] K. Sakuma, K. Taguchi, A. Katsuki, Study on deep-hole-drilling with solid-boring tool - the burnishing action of guide pads and their influence on hole accuracies, Bulletin of the Japan Society of Mechanical Engineering 23 (1980) 1921-1928.

DOI: 10.1299/jsme1958.23.1921

[8] K. Sakuma, K. Taguchi, S. Kinjo, Study on deep hole drilling with solid boring tools - the effect of tool material on the cutting performance, Bulletin of the Japan Society of Mechanical Engineering 21 (153) (1978) 532-542.

DOI: 10.1299/jsme1958.21.532

[9] M.C Shaw, C.J Oxford, On the drilling of metals II - The torque and thrust in drilling, Tans. ASME 79 (1957) 139-148.

DOI: 10.1115/1.4012945

[10] W. Theis, O. Webber, C. Weihs, Statistics, dynamics and quality - Improving BTA-deep-hole drilling", Technical Report 6/2004 of the SFB 475, University of Dortmund (2004).

[11] M. Al-Ata, M.T. Hayajneh, An investigation of bell mouthing in precision hole machining with self-piloting tools, Int. J. Adv. Manuf. Technol. 43 (2009) 22-32.

DOI: 10.1007/s00170-008-1691-2

[12] K. Weinert, T. Bruchhaus, Tribological investigations into the operational behavior of self-piloting drilling tools, Wear 225-229 (1999) 925-935.

DOI: 10.1016/s0043-1648(98)00411-6

[13] C.S. Deng, J.H. Chin, Roundness errors in BTA drilling and a model of waviness and lobing caused by resonant forced vibrations of its long drill shaft, Journal of manufacturing Science and Engineering 126 (2004) 524-534.

DOI: 10.1115/1.1765142

[14] C.S. Deng, J.C. Huang, J.H. Chin, Effects of support misalignments in deep-hole drill shafts on hole straightness, International Journal of Machine Tools and Manufacture 41 (2001) 1165-1188.

DOI: 10.1016/s0890-6955(01)00007-4

[15] A. Al-Hamdan, Effect of misalignment on the cutting force signature in drilling, Journal of Materials Processing Technology 124 (2002) 83-91.

DOI: 10.1016/s0924-0136(02)00051-1

[16] C.S. Deng, J.H. Chin, Hole roundness in deep-hole drilling as analysed by Taguchi methods, Int. J. Adv. Manuf. Technol. 25 (2005) 420-426.

DOI: 10.1007/s00170-003-1825-5

[17] N. Guibert, H. Paris, J. Rech, A numerical simulator to predict the dynamical behavior of the self-vibratory drilling head, International Journal of Machine Tools and Manufacture 48 (2008) 644-655.

DOI: 10.1016/j.ijmachtools.2007.11.003

[18] K. Weinert, O. Webber, C. Peters, On the influence of drilling depth dependent modal damping on chatter vibration in BTA deep hole drilling, CIRP Annals - Manufacturing Technology, Volume 54 (2005) 363-366.

DOI: 10.1016/s0007-8506(07)60123-1

[19] K. Weinert, O. Webber, M. Hüsken, J. Mehnen, W. Theis, Analysis and prediction of dynamic disturbances of the BTA deep hole drilling process, Proceedings of the Third CIRP International Seminar on Intelligent Computation in Manufacturing Engineering (2002) 297-302.

[20] K. Weinert, O. Webber, M. Hüsken, J. Mehnen, Statistics and time series analyses of BTA deep hole drilling, International Conference on Non-linear Dynamics in Mechanical Processing (2001).

[21] A. Messaoud, C. Weihs, Monitoring a deep hole drilling process by nonlinear time series modeling, Journal of Sound and Vibration 321 (2009) 620–630.

DOI: 10.1016/j.jsv.2008.10.028

[22] A. Messaoud, C. Weihs, F. Hering, Detection of chatter vibration in a drilling process using multivariate control charts, Computational Statistics and Data Analysis 52 (2008) 3208-3219.

DOI: 10.1016/j.csda.2007.09.029

[23] D. Biermann, A. Sacharow, K. Wohlgemuth, Simulation of the BTA deep-hole drilling process, Prod. Eng. Res. Devel. 3 (2009) 339-346.

DOI: 10.1007/s11740-009-0176-y

[24] N. Raabe, O. Webber, W. Theis, Spiralling in BTA deep-hole drilling: models of varying frequencies, From Data and Information Analysis to Knowledge Engineering, Studies in Classification, Data Analysis, and Knowledge Organization (2006) 510-517.

DOI: 10.1007/3-540-31314-1_62

[25] V.P. Astakhov, M.O.M. Osman, An analytical evaluation of the cutting forces in self piloting drilling using the model of shear zone with parallel boundaries. Part 1: Theory, International Journal of Machine Tools and Manufacture 36 (1996) 1187-1200.

DOI: 10.1016/0890-6955(96)00024-7

[26] V.P. Astakhov, M.O.M. Osman, An analytical evaluation of the cutting forces in self piloting drilling using the model of shear zone with parallel boundaries. Part 2: Application, International Journal of Machine Tools and Manufacture 36 (1996) 1335-1345.

DOI: 10.1016/s0890-6955(96)00025-9

[27] F. Kea, J. Nib, D.A. Stephenson, Chip thickening in deep-hole drilling, International Journal of Machine Tools and Manufacture 46 (2005) 1500-1507.

DOI: 10.1016/j.ijmachtools.2005.09.022

[28] F. Kea, J. Nib, D.A. Stephenson, Continuous chip formation in drilling, International Journal of Machine Tools and Manufacture 45 (2005) 1652-1658.

DOI: 10.1016/j.ijmachtools.2005.03.011

[29] C.H. Gao, K. Cheng, D. Kirkwood, The investigation on the machining process of BTA deep hole drilling, Journal of Materials Processing Technology 107 (2000) 222-227.

DOI: 10.1016/s0924-0136(00)00684-1

[30] R. Komanduri, R.H. Brown, On the mechanics of chip segmentation in machining, Journal of Engineering for Industry 103 (1981) 33-51.

DOI: 10.1115/1.3184458

[31] J. Barry, G. Byrne, D. Lennon, Observations on chip formation and acoustic emission in machining Ti-6Al-4V Alloy, International Journal of Machine Tools and Manufacture 41 (2001) 1055-1070.

DOI: 10.1016/s0890-6955(00)00096-1

[32] S. Atlati, B. Haddag, M. Nouari, M.Zenasni, Analysis of a new Segmentation Intensity Ratio ''SIR'' to characterize the chip segmentation process in machining ductile metals, International Journal of Machine Tools and Manufacture 51 (2011) 687-700.

DOI: 10.1016/j.ijmachtools.2011.05.007

[33] S. Kouadri, K. Necib, S. Atlati, B. Haddag, M. Nouari, Quantification of the chip segmentation in metal machining: Application to machining the aeronautical aluminium alloy AA2024-T351 with cemented carbide tools WC-Co. International Journal of Machine Tools and Manufacture 64 (2013) 102-113.

DOI: 10.1016/j.ijmachtools.2012.08.006

[34] M.A. Davies, T.J. Burns, C.J. Evans, On the dynamics of chip formation in machining hard metals, Annals of the ClRP 46 (1997) 25-30.

DOI: 10.1016/s0007-8506(07)60768-9

[35] A. Akhavan Farid, S. Sharif, M.H. Idris, Chip morphology study in high speed drilling of Al–Si alloy, Int. J. Adv. Manuf. Technol. 57 (2011) 555-564.

DOI: 10.1007/s00170-011-3325-3

[36] J. Barry, G. Byrne, The mechanisms of chip formation in machining hardened steels, Journal of Manufacturing Science and Engineering 124 (2002) 528-535.

DOI: 10.1115/1.1455643

[37] A.E. Bayoumi, J.Q. Xie, Some metallurgical aspects of chip formation in cutting Ti–6 wt%Al–4 wt%V alloy, Materials Science and Engineering A 190 (1995) 173-180.

DOI: 10.1016/0921-5093(94)09595-n

[38] M.C. Shaw, A. Vyas, The mechanism of chip formation with hard turning steel, CIRP Annals - Manufacturing Technology 47 (1998) 77-82.

DOI: 10.1016/s0007-8506(07)62789-9

[39] V.P. Astakhov, S. Shvets, The assessment of plastic deformation in metal cutting, Journal of Materials Processing Technology 146 (2004) 193-202.

DOI: 10.1016/j.jmatprotec.2003.10.015

[40] E. Merchant, Basic mechanics of the metal cutting process, J. App. Mech., Trans. ASME 66 (1944) A-168.

[41] SANDVIK Coromant, Deep hole drilling, Product catalogue and application guide (2003).