scholarly journals Process parameters effect on material removal mechanism and cut quality of abrasive water jet machining

2013 ◽  
Vol 40 (2) ◽  
pp. 277-291 ◽  
Author(s):  
P. Jankovic ◽  
T. Igic ◽  
D. Nikodijevic
Keyword(s):  
Damage Mechanics ◽  
Water Jet ◽  
High Tech ◽  
Abrasive Water Jet ◽  
Machining Processes ◽  
Pull Out ◽  
Water Jet Cutting ◽  
Cut Surface ◽  
Conventional Machining

The process of the abrasive water jet cutting of materials, supported by the theories of fluid mechanics, abrasive wear and damage mechanics, is a high-tech technologies that provides unique capabilities compared to conventional machining processes. This paper, along the theoretical derivations, provides original contributions in the form of mathematical models of the quantity of the cut surface damage, expressed by the values of cut surface roughness. The particular part of this paper deal with the results of the original experimental research. The research aim was connected with the demands of industry, i.e. the end user. Having in mind that the conventional machining processes are not only lagging behind in terms of quality of cut, or even some requests are not able to meet, but with the advent of composite materials were not able to machine them, because they occurred unacceptable damage (mechanical damage or delamination, fiber pull-out, burning, frayed edges).

Applications of the abrasive water jet technique in civil engineering

2019 ◽  
Vol 17 (4) ◽  
pp. 417-428
Author(s):  
Predrag Jankovic ◽  
Tomislav Igic ◽  
Miroslav Radovanovic ◽  
Dragana Turnic ◽  
Srdjan Zivkovic
Keyword(s):  
Structural Engineering ◽  
Civil Engineering ◽  
Water Jet ◽  
High Tech ◽  
Abrasive Water Jet ◽  
Machining Processes ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
Processing Techniques ◽  
Conventional Machining

Water jet processing techniques can be successfully applied in many fields of civil engineering, such as: structural engineering, structural reconstruction, renovation, demolition and recycling. The problem of cutting difficult-to-machine materials led to the development and application of today the most attractive method for contour cutting - Abrasive Water Jet Cutting (AWJC). It is a high-tech technique that provides unique capabilities compared to conventional machining processes. This paper, along the theoretical derivations, provides a study on use of water jet in construction and civil engineering. The particular part of this paper deals with the results of the original experimental research on granite and aluminum cutting.

Quality of the Cut Surfaces Processed by AWJC as a Function of the Distance between the Cutting Head and Working Sample

2015 ◽  
Vol 809-810 ◽  
pp. 207-212 ◽  
Author(s):  
Eugen Herghelegiu ◽  
Crina Radu ◽  
Carol Schnakovszky ◽  
Valentin Zichil
Keyword(s):  
Water Jet ◽  
Machining Processes ◽  
Influence Of Process Parameters ◽  
Flexible Technology ◽  
Cutting Head ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
High Nickel ◽  
Conventional Machining

Water jet cutting is one of the newest techniques in non-conventional machining processes. It is a flexible technology since the same equipment can be used to cut virtually any material, such as steel stainless steel, high-nickel alloys and polymer composites (usually, for these materials, the water jet is mixed with an abrasive material, the process being known as abrasive water jet cutting - AWJC) . Compared with the classical technologies, water jet cutting presents the following advantages: very low side forces during machining, it is rapid, it is silent, no thermal distortion, a good cutting accuracy and minimal burrs. To optimize the process, it is necessary to analyze the influence of process parameters on the quality of cut. The aim of this paper is to analyze the influence of distance between the cutting head and the working sample on the quality of cut, quantified by the following parameters: width of the processed surface at the jet inlet, jet outlet, deviation from perpendicularity, inclination angle and roughness.

scholarly journals The assessment of properties for selected factors in abrasive water jet process

2015 ◽  
Vol 21 (3) ◽  
pp. 203
Author(s):  
Anna Šúňová ◽  
Roman Šúň ◽  
Emil Spišák ◽  
Mária Franková
Keyword(s):  
Water Jet ◽  
Cutting Edge ◽  
Abrasive Water Jet ◽  
Water Jet Cutting ◽  
Cutting Surface ◽  
Abrasive Water Jet Cutting ◽  
Cutting Rate ◽  
Cutting Velocity ◽  
Cut Surface

The article presents the current conditions of abrasive water jet cutting process and factors relative to the quality of cutting surface. The main goal of research was to evaluate the assessment of the cutting depth, corrugated bottom cutting edge and roughness of the specimens depending on selected factors such as cutting velocity and abrasive amount in the abrasive water jet process. Specimen were cut in four phases as a square. Main results were that the distance between water jet entering and water jet leaving is decreased with the increasing abrasive amount and by following lower cutting rates. The increasing of a cutting rate negatively effects the quality of the cut surface and the size of the distance between water jet entering and water jet leaving, because the increasing of a cutting rate increases also values of the mentioned parameters. As to the distance between water jet entering and water leaving, the abrasive amount of 200-250 g.min-1 at the rate of 50 mm.min-1 is considered to be optimal, but outside this range the influence of the abrasive amount impacts negatively, primarily on water jet entering and water jet leaving that has a direct influence on the corrugated bottom cutting edge.

Analysis of Stresses in CFRP Composite Plates Drilled with Conventional and Abrasive Water Jet Machining

2013 ◽  
Vol 763 ◽  
pp. 127-143 ◽  
Author(s):  
M. Saleem ◽  
Habiba Bougherara ◽  
L. Toubal ◽  
F. Cénac ◽  
Redouane Zitoune
Keyword(s):  
Fatigue Testing ◽  
Composite Plates ◽  
Water Jet ◽  
Image Correlation ◽  
Initial Surface ◽  
Abrasive Water Jet ◽  
Machining Processes ◽  
Static Tests ◽  
The Difference ◽  
Conventional Machining

The aim of this paper is to analyze the influence of two machining processes on the mechanical behaviour of composite plates under cyclic loading. For this purpose, an experimental study using several CFRP plates drilled with conventional machining and non-conventional machining (abrasive water jet) was carried out. Digital image correlation and static tests using an Instron 4206 tester were performed. In addition, infrared thermography (IR) and fatigue tests were also performed to assess temperature and damage evolutions and also the stiffness degradation. Fatigue results have shown that the damage accumulation in specimens drilled with conventional machining was higher than the abrasive water jet ones. Furthermore, the endurance limit for plates drilled conventionally was approximately 10% higher than those drilled with abrasive water jet. This difference was related to the initial surface integrity after machining induced by the difference in the mechanism of material's removal between the two processes. The difference in surface texture was responsible for the initiation of stress concentration sites as evident from IR camera’s stress analysis. This was confirmed by SEM tests conducted after a destructive sectioning of the specimens before fatigue testing.

scholarly journals Study of high-pressure abrasive water jet capacity indices for steep cutting of steels

Mechanik ◽  
2017 ◽  
Vol 90 (11) ◽  
pp. 997-999
Author(s):  
Rafał Kudelski
Keyword(s):  
High Pressure ◽  
New Technologies ◽  
Construction Materials ◽  
Dimensional Accuracy ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
New Construction

Quality of the technological part is one of the major problems of modern machine manufacturing. In many cases, components are manufactured from new construction materials with specific properties that are considered difficult to machining applying conventional technologies. Hence, to search for new technologies, including high-pressure abrasive water jet cutting in the context of the S355J2H steel elements manufacture, while maintaining the quality requirements of the machining, is the need. The results of tests on the accuracy of components made of S355J2H steel are presented as dependent on the water jet pressure, cutting feedrate and the amount of abrasive dozed, with constant element thickness. The accuracy of the design measure – regardless of dimensional accuracy – was the magnitude of the lateral sagging of the cut workpiece resulting from the specific mechanism of water jet removal mechanism.

scholarly journals Experimental study on reverse engineering in case of composite materials cut by water jet cutting

2018 ◽  
Vol 178 ◽  
pp. 03004 ◽  
Author(s):  
Ioan Alexandru Popan ◽  
Nicolae Balc ◽  
Alina Popan ◽  
Alexandru Carean
Keyword(s):  
Reverse Engineering ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
3D Scanner ◽  
Advantages And Disadvantages ◽  
Complex Part ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
Master Model

The main objective of the paper consists in remanufacturing of a part, through Abrasive Water Jet Cutting, using a method of reverse engineering based on 3D scanning. The characteristics of this process, the equipment and the main applications are presented. The research starts with manufacturing of a master model made by CFRP. This master model is a complex part cut by abrasive water jet cutting. In scanning process was used the 3D Scanner Artec Space Spider and the point cloud was processed using Artec Studio 11 software. By using this new 3D model was manufactured a new part, with the same setup. The quality characteristics (accuracy and surface quality) of this part was compared with the master model. The paper presents the advantages and disadvantages of this reverse engineering method applied on abrasive water jet cutting process.

A Method to Reduce Milling Time for Ti-6Al-4V Alloy for Controlled Depth Milling Using Abrasive Water Jet Machining

2011 ◽  
Vol 383-390 ◽  
pp. 1764-1768 ◽  
Author(s):  
Vijay Kumar Pal ◽  
Puneet Tandon
Keyword(s):  
Flow Rate ◽  
Traverse Speed ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Surface Waviness ◽  
Feed System ◽  
Machining Processes ◽  
Machining Time ◽  
Abrasive Water Jet Machining ◽  
Conventional Machining

This Abrasive Water Jet Machining (AWJM) process is usually used to through cut materials which are difficult to cut by conventional machining processes. This process may also be used for controlled depth milling (CDM) of materials. This work primarily focuses on controlling the abrasive flow rate to reduce the time for machining the component. Here, an experimental setup is made with a modified attachment for abrasive feed system to machine for Ti-6Al-4V alloy. The work also investigates the surface morphology, tolerance on depth of machining and surface waviness for the modified setup. With change in mass flow rate of abrasive, the traverse speed is altered and its effects on the machining time are studied. It is observed that traverse speed is an important parameter in the case of CDM for AWJM. It is also shown that surface waviness can be reduced as traverse speed is increased by using modified abrasive feeding system.

scholarly journals Influence of Abrasive Water Jet (AWJ) on Surface Roughness

2021 ◽  
Vol 6 (3) ◽  
pp. 132-140
Author(s):  
Ameer Jalil Nader ◽  
K. Shather Saad
Keyword(s):  
Surface Roughness ◽  
Feed Rate ◽  
Water Jet ◽  
Standoff Distance ◽  
Abrasive Water Jet ◽  
Average Surface Roughness ◽  
Machining Processes ◽  
Average Surface ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting

Abrasive water jet (AWJ) is one of the most advanced and valuable non-traditional machining processes because of its massive advantages of removing metals ranging from hard to soft. This paper focused on studying the influence of jet pressure, feed rate and standoff distance on surface roughness during cutting carbon steel using abrasive water jet cutting. A surface roughness device assessed the surface roughness by performing sixteen experiments to identify the distinct texture of the surface. Based on the experiences, the best surface roughness value was 3.14 μm at jet pressure 300 MPa, standoff distance 4mm and feed rate 30 mm/min. The Taguchi method was introduced to implement the experiments and indicate the most influential process parameters on average surface roughness. The experimental results reveal that feed rate has a significant effect on average surface roughness.

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