For drilling difficult-to-machine materials, abrasive water jet (AWJ) drilling provides several advantages not offered by other machining methods, such as the capability to achieve higher depth-diameter ratios, the absence of a heat-affected zone, and no thermal distortion. An acoustic emission (AE) sensing technique is used to study the material removal mechanisms involved in the AWJ drilling process. The feasibility of using r.m.s. acoustic emission (AERMS) to monitor the AWJ drilling depth on-line is also investigated. Stochastic modelling of the time domain AE signal provides more insight into the physics of the process.
KovacevicR.HashishM.MohanR. S.KimT. J.RamuluM.GeskinE. S.State of the art of research and development in abrasive water jet machining. Trans. ASME, J. Mfg Sci. Engng, 1997, 119 (4B), 776–785. 75th Anniversary Issue.
2.
HashishM.Turning, milling, and drilling with abrasive water jets. In Ninth International Symposium on Jet Cutting Technology, Japan, October 1988, pp. 113–131.
3.
SavanickG. A.KrawzaW. G.An abrasive water jet rock drill. In Proceedings of Fourth US Water Jet Conference, August 1987, pp. 129–132.
4.
HashishM.The potential of an ultrahigh-pressure abrasive water jet rock drill. In Fifth American Water Jet Conference, Canada, August 1989, pp. 321–332.
5.
HashishM.WhalenJ.Precision drilling of ceramic- coated components with abrasive-waterjets. Trans. ASME, J. Engng Gas Turbines and Power, 1992, 115, 148–154.
6.
RajuS. P.RamuluM.A transient model for material removal in the abrasive water jet machining process. In Proceedings of Seventh American Water Jet Conference, Seattle, Washington, August 1993, pp. 141–155.
7.
FryeR. W.PolkD. H.Laser drilling of ceramic for heat exchanger applications. In Proceedings of International conference on Applications of Lasers and Electro-Optics, Ohio State University, Ohio, 1986, pp. 137–144.
8.
MohanR.MomberA.KovacevicR.On-line monitoring of depth of AWJ penetration using acoustic emission technique. In Water Jet Cutting Technology, 1995, pp. 649–664 (Mechanical Engineering Publication, Suffolk).
9.
LiuJ. J.DornfeldD. A.Monitoring of micro-machining process using acoustic emission. Trans. NAMRI/SME, 1992, XX, 189–195.
10.
BlumT.InasakiI.A study on acoustic emission from the orthogonal cutting process. ASME, J. Engng for Industry, 1990, 112, 203–211.
11.
EmelE.Kannatey-AsibuE.Acoustic emission monitoring of the cutting process negating the influence of varying conditions. Trans. ASME, J. Engng Mater. Technol., 1991, 113, 456–464.
12.
SturgesR. H.Monitoring milling processes through AE and tool/part geometry. Trans. ASME J. Engng for Industry, 1992, 114, 8–14.
13.
PanditS. M.StaceyJ. D.Data dependent system analysis of acoustic emission in grinding. ASME PED, 1993, 64, 437–444.
14.
ChryssolourisG.ShengP.AnastasiaN.DomroeseM.Investigation of acoustic sensing for laser drilling. Trans. NAMRI/SME, 1992, XX, 227–233.
15.
MomberA.MohanR.KovacevicR.Acoustic emission measurements on brittle materials during abrasive water jet cutting. In First International Machining and Grinding Conference, 1995, paper MR 95–184, pp. 439–458.
16.
SchofieldB. H.Research on the sources and characteristics of acoustic emission. ASTM STP 505, 1972, pp. 11–19.
17.
KovacevicR.ZhangY. M.Identification of surface characteristics from large samples. Proc. Instn Mech. Engrs, Part C, Journal of Mechanical Engineering Science, 1992, 206, 275–284.
18.
PanditS. M.WuS. M.Time Series and Systems Analysis with Application, 1983 (John Wiley, Reprinted by Krieger Publishing, Melbourne, Florida).
19.
PanditS. M.ShunmugamM. S.Signature of machine tool errors on surface texture by DDS. Trans. ASME, J. Engng for Industry, 1992, 114, 370–374.
