Basis of Novel Technique for Spatial Objects Shaping With High-Pressure Abrasive Water Jet

2010 ◽  
Vol 132 (5) ◽  
Author(s):  
P. J. Borkowski ◽  
J. A. Borkowski
Keyword(s):  
High Pressure ◽  
Feed Rate ◽  
Spatial Model ◽  
Theoretical Basis ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Spatial Objects ◽  
Novel Technique ◽  
Raster Image ◽  
Novel Method

Novel method for the 3D shaping of different materials using a high-pressure abrasive water jet is presented in the paper. For the steering movement process of the jet, a principle similar to the raster image way of record and readout was used. However, respective colors of pixels of such a bitmap are connected with adequate jet feed rate that causes erosion of material with adequate depth. Thanks to that innovation, one can observe spatial imaging of the object. Theoretical basis as well as spatial model of material shaping including steering program is presented in. There are also presented experimental erosion results as well as practical examples of the object’s bas-relief made of metal.

scholarly journals Permeability Enhancement Properties of High-Pressure Abrasive Water Jet Flushing and Its Application in a Soft Coal Seam

2021 ◽  
Vol 9 ◽  
Author(s):  
Xinzhe Zhang ◽  
Piotr Wiśniewski ◽  
Sławomir Dykas ◽  
Guojie Zhang
Keyword(s):  
High Pressure ◽  
Coal Seam ◽  
Water Jet ◽  
Gas Pressure ◽  
Theory And Practice ◽  
Abrasive Water Jet ◽  
Gas Drainage ◽  
Permeability Enhancement ◽  
Soft Coal ◽  
Soft Coal Seam

High-pressure abrasive water jet flushing (HPAWJF) is an effective method used to improve coal seam permeability. In this study, based on the theories of gas flow and coal deformation, a coupled gas-rock model is established to investigate realistic failure processes by introducing equations for the evolution of mesoscopic element damage along with coal mass deformation. Numerical simulation of the failure and pressure relief processes is carried out under different coal seam permeability and flushing length conditions. Distributions of the seepage and gas pressure fields of the realistic failure process are analyzed. The effects of flushing permeability enhancement in a soft coal seam on the gas drainage from boreholes are revealed by conducting a field experiment. Conclusions can be extracted that the gas pressure of the slotted soft coal seam is reduced and that the gas drainage volume is three times higher than that of a conventional borehole. Field tests demonstrate that the gas drainage effect of the soft coal seam is significantly improved and that tunneling speed is nearly doubled. The results obtained from this study can provide guidance to gas drainage in soft coal seams regarding the theory and practice application of the HPAWJF method.

COMPUTATIONAL FLUID DYNAMICS SIMULATION OF EROSION-CORROSION IN ABRASIVE WATER JET MACHINING

2021 ◽  
pp. 2150031
Author(s):  
H. DENİZ ADA ◽  
MEHMET ERDEM ◽  
KADİR GOK
Keyword(s):  
High Pressure ◽  
Water Jet ◽  
Dynamics Simulation ◽  
Abrasive Water Jet ◽  
Manufacturing Method ◽  
Water Jet Cutting ◽  
Erosion Corrosion ◽  
Computer Environment ◽  
Manufacturing Methods ◽  
Traditional Manufacturing

Today, conventional machining with chip or machining without chip machining manufacturing methods is used to bring to the desired dimensions sizes the machines and equipment used in the industry. However, non-traditional manufacturing methods are used in cases where traditional machining manufacturing methods are inadequate. Cutting with water jet which is one of the non-traditional manufacturing methods is commonly used in several fields of industry. Unlike traditional manufacturing methods such as turning and milling, not using of a physical cutting tool is among the advantages of the method. Abrasive water jet manufacturing method was started to be applied by adding abrasive particles in the water jet. Apart from the superior properties of the method, possible damages occur in the water jet nozzle due to processes such as cutting or drilling by applying high pressure. Erosion-corrosion is the leading damage among these damages. In this study, the erosion-corrosion in the nozzle caused by high-pressure water and abrasive during the abrasive water jet cutting process was simulated in the computer environment. In this paper, the erosion rate in the nozzle was calculated as 6,90E-06[Formula: see text]kg/m2[Formula: see text]s. This value was converted as 0,30[Formula: see text]mm (27,09[Formula: see text]mm for yearly) via developed software for 100[Formula: see text]h.

The Influence of the Feed Rate on the Quality of Surfaces Processed by AWJ at High Pressures

2013 ◽  
Vol 837 ◽  
pp. 196-200
Author(s):  
Carol Schnakovszky ◽  
Eugen Herghelegiu ◽  
Crina Radu ◽  
Ion Cristea
Keyword(s):  
Automobile Industry ◽  
Feed Rate ◽  
Food Industry ◽  
High Pressures ◽  
Mining Industry ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Metallic Materials ◽  
Wood Industry

Abrasive water jet processing is one of the newest unconventional technologies. It can be used to cut different metallic materials (steel, titanium alloys, aluminium alloys, brass) or non-metallic materials (wood, plastics, glass, stone, granite etc.). Therefore, this technology can be successfully applied in different industries as: food industry, wood industry, aeronautic industry, automobile industry, mining industry. Between the advantageous of abrasive water jet processing technology it is worth noticing the following: it is rapid, very small processing forces are generated, it is silent, no thermal distortions occur. The aim of the current paper was to determine the influence of the feed rate on the quality of surfaces processed by AWJ at high pressure. The parameters that quantified the quality of the processed surface were those defined in the ISO/WD/TC 44 N 1770 standard: width of the processed surface at the jet inlet (Li), width of the processed surface at the jet outlet (Lo), deviation from perpendicularity (u), inclination angle (α) and roughness (Ra).

scholarly journals A numerical and experimental study of oblique impact of ultra-high pressure abrasive water jet

2016 ◽  
Vol 8 (3) ◽  
pp. 168781401663679 ◽  
Author(s):  
Can Kang ◽  
Haixia Liu ◽  
Xiuge Li ◽  
Ya Zhou ◽  
Xiaonong Cheng
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Oblique Impact ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Ultra High Pressure

Design of the Circular Cutting Device

2014 ◽  
Vol 556-562 ◽  
pp. 1126-1128
Author(s):  
Chao Kun Wei ◽  
Shan Shan Tang ◽  
Hao Yang
Keyword(s):  
High Pressure ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Pressure Water ◽  
High Pressure Water Jet

Currently, abrasive water jet technology is widely applied to cutting while it has been difficult in circular cutting, as travel mechanism is not easy to realize or the structure is too complex. To solve this problem, this paper presents a simple circular cutting device for high-pressure water jet technology. The cutting device completes cutting work by rotating clamping devices around the center thimble through electromotor. At the same time,the paper introduces the components of the circular cutting device and analyzes the reliability of the slider part by ANSYS.

scholarly journals An Investigation of Abrasive Water Jet Machining on Graphite/Glass/Epoxy Composite

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Deepak Doreswamy ◽  
Basavanna Shivamurthy ◽  
Devineni Anjaiah ◽  
N. Yagnesh Sharma
Keyword(s):  
Process Parameters ◽  
Feed Rate ◽  
Epoxy Composite ◽  
Research Work ◽  
Water Jet ◽  
Kerf Width ◽  
Machining Parameters ◽  
Operating Pressure ◽  
Abrasive Water Jet ◽  
Glass Fiber Reinforced

In the present research work, the effect of abrasive water jet (AWJ) machining parameters such as jet operating pressure, feed rate, standoff distance (SOD), and concentration of abrasive on kerf width produced on graphite filled glass fiber reinforced epoxy composite is investigated. Experiments were conducted based on Taguchi’s L27 orthogonal arrays and the process parameters were optimized to obtain small kerf. The main as well as interaction effects of the process parameters were analyzed using the analysis of variance (ANOVA) and regression models were developed to predict kerf width. The results show that the operating pressure, the SOD, and the feed rate are found to be significantly affecting the top kerf width and their contribution to kerf width is 24.72%, 12.38%, and 52.16%, respectively. Further, morphological study is made using scanning electron microscope (SEM) on the samples that were machined at optimized process parameters. It was observed that AWJ machined surfaces were free from delamination at optimized process parameters.

Evaluation of Vibration Parameters under Machining

2015 ◽  
Vol 669 ◽  
pp. 228-234 ◽  
Author(s):  
Anton Panda ◽  
Marek Prislupčák ◽  
Jozef Jurko ◽  
Tibor Krenický ◽  
Marek Jančík
Keyword(s):  
Feed Rate ◽  
High Accuracy ◽  
Water Jet ◽  
Material Damage ◽  
Abrasive Water Jet ◽  
Accuracy And Precision ◽  
Vibration Parameters ◽  
Unconventional Methods ◽  
Chemical Material

AWJ abrasive water jet belongs to the unconventional methods of machining. Waterjet offers a number of advantages over other cutting methods. There is no heat or chemical material damage, high accuracy and precision, the ability to cut any material and others. Despite many advantages of AWJ has some technical elements that can be improved and optimized. This article deals with effect of vibration on the technological head and consequently wears. The aim of the experiments is to find the most appropriate feed rate, which extends the life of the technological head.

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