Geometrical modelling of abrasive waterjet footprints: A study for 90° jet impact angle

Modelling of abrasive waterjet footprints is of critical importance when aiming to generate controlled freeform surfaces. The paper reports on a geometrical model of the jet footprint (kerf) in maskless controlled-depth milling applications. The model firstly needs to find the material specific erosion (etching) rate that is obtained from the jet footprint by taking the limiting conditions (high jet feed rates) of the model. Once this is found, the jet footprint can be predicted accurately for any jet feed speed. An example of model validation is presented for 90° jet impingement angle against a SiC ceramic as target material.

[1]  J. Bitter.  A study of erosion phenomena part I , 1963 .

[2]  Mohamed A. Elbestawi,et al.  Modelling of Abrasive Waterjet Machining: A New Approach , 2005 .

[3]  Sundman Bo.,et al.  エレクトロウェッティングディスプレイの油脱ぬれパターンの観測と光学的意味 | 文献情報 | J-GLOBAL 科学技術総合リンクセンター , 2008 .

[4]  Kamlakar P Rajurkar,et al.  Opportunities in abrasive water-jet machining , 1997 .

[5]  J.K.M. Jansen,et al.  An analytical solution for mechanical etching of glass by powder blasting , 2002 .

[6]  Jan K. Spelt,et al.  Abrasive jet micromachining of acrylic and polycarbonate polymers at oblique angles of attack , 2008 .

[7]  P. J. Slikkerveer,et al.  Model for patterned erosion , 1999 .

[8]  H.J.J. Kals,et al.  Modelling of high velocity, loose abrasive machining processes , 2002 .

[9]  Jan K. Spelt,et al.  Abrasive jet micro-machining of planar areas and transitional slopes , 2008 .

[10]  Radovan Kovacevic,et al.  Principles of Abrasive Water Jet Machining , 2012 .

[11]  Li Ma,et al.  Waterjet penetration simulation by hybrid code of SPH and FEA , 2008 .

[12]  V. C. Venkatesh,et al.  Parametric Studies on Abrasive Jet Machining , 1984 .

[13]  I. Finnie.  Erosion of surfaces by solid particles , 1960 .

[14]  D. Axinte,et al.  Influence of kinematic operating parameters on kerf geometry in abrasive waterjet machining of silicon carbide ceramics , 2009 .

[15]  M. Hashish,et al.  The Effect of Beam Angle in Abrasive-Waterjet Machining , 1993 .

[16]  Christian Öjmertz,et al.  A Study on Abrasive Waterjet Milling , 1997 .