Parametric analysis of abrasive water jet machining

Mechanical engineering

The present research work highlights the simulation study of AWJM process parameters, i.e. velocity of jet, Jet impingement angle, grain size and stand-off-distance on pressure ,stress and Deformation generated at the jet impact surface, erosion rate during the fabrication of micro holes generation. K-60 Ceramic is widely accepted in the non-conventional machining process and associated industries with the years of track on record of proven performance in a vast number of brittle materials. The intense hardness and high strength of sintered ceramics creates it tough to machine them economically. The present surface development models are established for air-abrasive driven erosion progressions which cannot account for the result of heated abrasive movement on the target channel sidewall erosion that indicates to the advanced channel broadening detected in the AWJM of brittle materials. This paper focused on ideal numerical model to predict the surface contours of micro-holes in brittle material as name K-60 ceramic using AWJM. Most perceptible act in this research is to the selection of abrasive particle that for to achieve the appropriate intricate shaped holes upon K-60 ceramic with silicon carbide abrasives. The exact erosion rates of this material, pressure, stress generation and deformation due to stresses are measured as a function of velocity of abrasive jet at inlet zone of nozzle, abrasive jet angle using various abrasive grain sizes, Jet Velocity, Jet impingement angle and stand-off distance. Also erosion rate at the surface of nozzle function of abrasive jet angle using various abrasive grain sizes, Jet Impingement angle, stand-off distance and velocity of jet at the inlet of nozzle. Here 3-D CFD model is tested by taking different process parameter through simulation using SiC abrasive and the optimum processes constraints required for getting the above discussed responses with any error using ANSYS 18.1 CFX and FLUENT. KEYWORDS:; K-60 ceramic; 3-D CFD model; SiC abrasive; AWJM; Deformation; stress; ; Erosion rate; Pressure generation; ANSYS 18.1; CFX; FLUENT.

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