Presentation Title

Experimental Study on Submerged Abrasive Waterjet Micromachining

Start Date

November 2016

End Date

November 2016

Location

HUB 302-#65

Type of Presentation

Poster

Abstract

Abrasive waterjet micromachining (AWJMM) is a non-conventional material removal process which have proved to be capable of machining a wide range of materials including hard and brittle materials such as glasses and ceramics. This process has a relatively high material removal rate and it doesn’t cause thermal damage. AWJMM process involves a high velocity jet of water mixed with micron scale abrasive particles projected out through a nozzle miniaturized orifice. Most of the existing AWJMM process are performed in air as the medium. Recent studies have shown that the AWJMM processes is unable to uniformly machine the targeted surface due to the spreading of the waterjet resulting in a stagnation area. The material removal in the stagnation area is significantly lower than the surrounding areas resulting in non-uniform surface. Performing the AWJMM process with a submerged nozzle and workpiece could eliminate this problem and also reduce noise, splash and airborne debris particles during the machining process. This research explores the possibility of using the Submerged AWJMM process for micromachining ceramic materials. The research involves experimental studies on ceramic materials using in-house fabricated submerged AWJMM setup. The effect of critical process parameters including jet velocity, stand-off distance, abrasive grain geometry and material properties on the material removal rate of the process are studied. The outcome of this research would further the efficiency of waterjet machining processes, thereby enhancing its capability of precision machining a wider range of engineering materials.

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Nov 12th, 4:00 PM Nov 12th, 5:00 PM

Experimental Study on Submerged Abrasive Waterjet Micromachining

HUB 302-#65

Abrasive waterjet micromachining (AWJMM) is a non-conventional material removal process which have proved to be capable of machining a wide range of materials including hard and brittle materials such as glasses and ceramics. This process has a relatively high material removal rate and it doesn’t cause thermal damage. AWJMM process involves a high velocity jet of water mixed with micron scale abrasive particles projected out through a nozzle miniaturized orifice. Most of the existing AWJMM process are performed in air as the medium. Recent studies have shown that the AWJMM processes is unable to uniformly machine the targeted surface due to the spreading of the waterjet resulting in a stagnation area. The material removal in the stagnation area is significantly lower than the surrounding areas resulting in non-uniform surface. Performing the AWJMM process with a submerged nozzle and workpiece could eliminate this problem and also reduce noise, splash and airborne debris particles during the machining process. This research explores the possibility of using the Submerged AWJMM process for micromachining ceramic materials. The research involves experimental studies on ceramic materials using in-house fabricated submerged AWJMM setup. The effect of critical process parameters including jet velocity, stand-off distance, abrasive grain geometry and material properties on the material removal rate of the process are studied. The outcome of this research would further the efficiency of waterjet machining processes, thereby enhancing its capability of precision machining a wider range of engineering materials.