scholarly journals Numerical Research on Multi-Particle Movements and Nozzle Wear Involved in Abrasive Waterjet Machining

2021 ◽  
Author(s):  
Mingming Du ◽  
Haijin Wang ◽  
Huiyue Dong ◽  
Yingjie Guo ◽  
Yinglin Ke
Keyword(s):  
Abrasive Waterjet ◽  
Abrasive Particles ◽  
Abrasive Waterjet Machining ◽  
Fem Method ◽  
Proposed Model ◽  
Nozzle Wear ◽  
Mixing Chamber ◽  
Waterjet Machining ◽  
Pressure Water ◽  
Particle Velocities

Abstract Multi-particle velocities and trajectories in abrasive waterjet machining are of great value to understand the particle erosion mechanism involved in the cutting process. In this paper, the whole-stage simulation model is established from the high-pressure water and abrasive particles entering the nozzle to the mixed abrasive jet impacting the workpiece based on the SPH-DEM-FEM method. Comparing the simulation results with the experimental results under different process parameters, the capability of the proposed model is systematically validated. The model is applied to study the mixing and accelerating process of abrasive particles, and the results show that a speed difference is existed between the water and abrasive particles after being ejected from the nozzle. In addition, the nozzle wear pattern is also analyzed carefully. It is discovered that the most serious wear happened at the junction of the mixing chamber and the focusing tube. And the focusing tube wear is uneven and spreads downward.

scholarly journals Surface Quality of Jute Fibre Reinforced Polyester Composite by Abrasive Waterjet Machining

2020 ◽  
Vol 8 (4S4) ◽  
pp. 196-199
Keyword(s):  
Feed Rate ◽  
Unsaturated Polyester ◽  
Cutting Tools ◽  
Machining Process ◽  
Abrasive Waterjet ◽  
Base Surface ◽  
Abrasive Waterjet Machining ◽  
Waterjet Machining ◽  
Polyester Composite ◽  
Pressure Water

Unpleasantness in the job assumes an essential job in distinguishing manner that is how the genuine item cooperates with the encompassing world in the field of engineering. The Harsh surface gets wear easily and quickly, so consequently, the article producing area needs to get a mass in it. Nowadays composite assumes a vital job due to some great properties. Along these lines, composite needs to get more focus in its new trend. In cutting innovation, the instrument wear is the most important factor that should be considered. There is some non-customary machining process in which the cutting instrument isn't utilized in it. In this technique we utilize Abrasive water jet machine (AWJM) since it is a standout most utilized non-customary machining process, which has no cutting tools and the blend of rough molecule of garnet 80 mesh and high-pressure water from the spout is utilized to cut the workpiece with some of the parameters like grating stream rate, remain off separation, feed rate and siphon weight. The jute fiber reinforced unsaturated polyester composite (JF/UPR) created by pressure forming which is utilized for estimating surface Roughness (Ra) and furthermore to locate the base surface unpleasantness by changing the three distinct parameters of pressure (P), Standard of distance (Sd) and feed rate (Vf) with the predetermined evaluation of grating molecule.

scholarly journals Effect of Feed Rate on Surface Roughness in Abrasive Waterjet Machining of Jute Fibre Reinforced Polyester Composites

2019 ◽  
Vol 9 (1S4) ◽  
pp. 683-686
Keyword(s):  
Surface Roughness ◽  
Feed Rate ◽  
Resin Composite ◽  
Unsaturated Polyester ◽  
Physical And Mechanical Properties ◽  
Abrasive Waterjet ◽  
Water Stream ◽  
Abrasive Particles ◽  
Abrasive Waterjet Machining ◽  
Waterjet Machining

The common fiber strengthened composite are as a rule progressively utilized in different applications like space, flying machine, marine, building and car segment on account of their prevalent physical and mechanical properties despite the fact that they are somewhat expensive. AWJM speaks to a worldwide adaptable instrument supporting the machining of every normal material that are with no harm by straight contact with water. In this present work plans to explore jute fiber strengthened unsaturated polyester resin composite material investigating surface Roughness by changing three parameters, for example, Pressure, Standoff distance and Feed rate an ideal state of the material can be found and furthermore investigation of the cut surface geography after grating water stream machining. Rough utilized for cutting is garnet 80 mesh abrasive particles. It catalyzes the cutting and gives phenomenal surface completion.

Edge Finishing and Delamination Effects Induced During Abrasive Waterjet Machining on the Compression Strength of a Graphite/Epoxy Composite

Materials ◽  
2005 ◽  
Author(s):  
M. Ramulu ◽  
K. Colligan
Keyword(s):  
Flow Rate ◽  
Surface Finish ◽  
Compression Strength ◽  
Epoxy Composite ◽  
Abrasive Waterjet ◽  
Abrasive Particles ◽  
Abrasive Waterjet Machining ◽  
Waterjet Machining ◽  
Edge Surface ◽  
Edge Finishing

In this study the machined edges produced by abrasive waterjet (AWJ), were characterized by compression testing to assess the influence of edge finishing and delamination on the strength of graphite/epoxy laminates. The AWJ machined edges indicated that the surface finish of the machined edges was closely related to the feed rate and abrasive flow rate. Abrasive waterjet trimming of graphite/epoxy laminates is prone to producing exit ply delaminations, and these delaminations may have abrasive particles embedded in them, which tend to hold the delaminated surfaces apart. It was found that the abrasive waterjet process induced edge surface finish does not significantly reduce the strength of the laminate, however, the delaminations that that were induced in edge finishing do result in significant reductions in strength.

Simulation of abrasive waterjet machining based on unit event features

2003 ◽  
Vol 217 (5) ◽  
pp. 699-703 ◽  
Author(s):  
A Lebar ◽  
M Junkar
Keyword(s):  
Machining Process ◽  
Abrasive Waterjet ◽  
Process Unit ◽  
Abrasive Waterjet Machining ◽  
Machining Process Simulation ◽  
Abrasive Grain ◽  
Proposed Model ◽  
Empirical Level ◽  
Waterjet Machining ◽  
The Impact

Abrasive waterjet (AWJ) machining is a non-conventional process. Its most striking advantage is the absence of a heat-affected zone. AWJ machining can be successfully used on a very broad spectrum of materials, regardless of their brittleness, ductility or composition. However, this machining process has the disadvantage of striations being left on the surface of the machined workpiece. Since forecasting of the results of this process is still on the empirical level, great efforts are being put into the modelling of the AWJ process. In this paper, an original model of the AWJ machining process is presented. It is based on an AWJ process unit event, which in this case represents the impact of a particular abrasive grain. The geometrical characteristics of the unit event are measured on a physical model of the AWJ process. The measured dependencies and the proposed model relations are then implemented in AWJ machining process simulation.

scholarly journals Impacts of Traverse Speed and Material Thickness on Abrasive Waterjet Contour Cutting of Austenitic Stainless Steel AISI 304L

2021 ◽  
Vol 11 (11) ◽  
pp. 4925
Author(s):  
Jennifer Milaor Llanto ◽  
Majid Tolouei-Rad ◽  
Ana Vafadar ◽  
Muhammad Aamir
Keyword(s):  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Traverse Speed ◽  
Abrasive Waterjet ◽  
Taper Angle ◽  
Material Thickness ◽  
Abrasive Waterjet Machining ◽  
Kerf Taper ◽  
Waterjet Machining

Abrasive water jet machining is a proficient alternative for cutting difficult-to-machine materials with complex geometries, such as austenitic stainless steel 304L (AISI304L). However, due to differences in machining responses for varied material conditions, the abrasive waterjet machining experiences challenges including kerf geometric inaccuracy and low material removal rate. In this study, an abrasive waterjet machining is employed to perform contour cutting of different profiles to investigate the impacts of traverse speed and material thickness in achieving lower kerf taper angle and higher material removal rate. Based on experimental investigation, a trend of decreasing the level of traverse speed and material thickness that results in minimum kerf taper angle values of 0.825° for machining curvature profile and 0.916° for line profiles has been observed. In addition, higher traverse speed and material thickness achieved higher material removal rate in cutting different curvature radii and lengths in line profiles with obtained values of 769.50 mm3/min and 751.5 mm3/min, accordingly. The analysis of variance revealed that material thickness had a significant impact on kerf taper angle and material removal rate, contributing within the range of 69–91% and 62–69%, respectively. In contrast, traverse speed was the least factor measuring within the range of 5–18% for kerf taper angle and 27–36% for material removal rate.

Abrasive Waterjet Cutting of Aluminum Alloys: Workpiece Surface Roughness

2013 ◽  
Vol 404 ◽  
pp. 3-9 ◽  
Author(s):  
Nihat Tosun ◽  
Ihsan Dagtekin ◽  
Latif Ozler ◽  
Ahmet Deniz
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Aluminum Alloys ◽  
Abrasive Waterjet ◽  
Traditional Methods ◽  
Workpiece Surface ◽  
Abrasive Waterjet Machining ◽  
Waterjet Machining ◽  
Area Of Application ◽  
Better Than

Abrasive waterjet machining is one of the non-traditional methods of the recent years which found itself a wide area of application in the industry for machining of different materials. In this paper, the surface roughness of 6061-T6 and 7075-T6 aluminum alloys are being cut with abrasive waterjet is examined experimentally. The experiments were conducted with different waterjet pressures and traverse speeds. It has been found that the surface roughness obtained by cutting material with high mechanical properties is better than that of obtained by cutting material with inferior mechanical properties.

Effect of abrasive waterjet machining on LaPO4/Y2O3 ceramic matrix composite

2017 ◽  
Vol 54 (2) ◽  
pp. 205-214 ◽  
Author(s):  
K. Balamurugan ◽  
M. Uthayakumar ◽  
S. Sankar ◽  
U. S. Hareesh ◽  
K. G. K. Warrier
Keyword(s):  
Matrix Composite ◽  
Ceramic Matrix Composite ◽  
Ceramic Matrix ◽  
Abrasive Waterjet ◽  
Abrasive Waterjet Machining ◽  
Waterjet Machining
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