scholarly journals Jet lagging in abrasive water jet cutting of high-speed tool steel

2021 ◽  
Vol 27 (2) ◽  
pp. 73-80
Author(s):  
Ramiz Kurbegovic ◽  
Mileta Janjic
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Traverse Speed ◽  
Water Jet ◽  
Abrasive Waterjet ◽  
Depth Of Cut ◽  
Machining Parameters ◽  
Abrasive Water Jet ◽  
Working Pressure ◽  
Water Jet Cutting

Abrasive water jet machining is a very efficient unconventional method for contour cutting of different types of materials. As one of the main characteristics of the quality of surfaces machined with this method is curved lines that appear during machining. These lines are a consequence of the deviation of the abrasive water jet from its ideal vertical line, jet lagging, which are the cause of machining errors. The aim of this work is to investigate the influence of machining parameters on jet lagging. The samples of high-speed steel EN HS6-5-2 (JUS c.7680) were machined with an abrasive water jet under varying working pressure, traverse speed, abrasive mass flow rate, and stand-off distance. The jet lagging was measured at twenty places along with the depth of cut, and based on these results, the relationship between the jet lagging and machining parameters has been formed. In order to correctly select the process parameters, an empirical model for the prediction of jet lagging in abrasive waterjet cutting of high-speed steel EN HS6-5-2 was developed using regression analysis. This developed model has been verified with the experimental results that reveal high applicability of the model within the experimental range used.

scholarly journals Abrasive Water Jet Cutting of Stainless-Steel Optimization by Orthogonal Array Approach

2019 ◽  
Vol 71 (1) ◽  
pp. 55-61
Author(s):  
Andrzej Perec ◽  
Aleksandra Radomska-Zalas
Keyword(s):  
Stainless Steel ◽  
Traverse Speed ◽  
Water Jet ◽  
Maximum Depth ◽  
Depth Of Cut ◽  
Process Conditions ◽  
Machining Parameters ◽  
Abrasive Water Jet ◽  
Cutting Depth ◽  
Water Jet Cutting

Abstract The paper presents the use of Taguchi method to optimize the cutting of stainless steel by Abrasive Water Jet. Shown are the influence of the most important machining parameters, such a traverse speed, abrasive grains size and concentration of abrasive in the jet on the maximum depth of cut. Analysis of variance - ANOVA was used to determine the effect of machining parameters on the cutting depth. Based on the calculated signal/noise ratios for individual parameters of the cutting process, their impact on cutting depth was determined and optimal process conditions were determined in order to reach the maximum depth of cut. The empirical verification of this process was also performed by comparing the depth of cut predicted and achieved in the tests.

Aspects of Machining Parameter Effect on Cut Quality in Abrasive Water Jet Cutting

2015 ◽  
Vol 809-810 ◽  
pp. 201-206
Author(s):  
Predrag Janković ◽  
Miroslav Radovanović ◽  
Oana Dodun ◽  
Miloš Madić ◽  
Dušan Petković
Keyword(s):  
Great Influence ◽  
Traverse Speed ◽  
Water Jet ◽  
Machining Parameters ◽  
Abrasive Water Jet ◽  
Abrasive Water Jet Machining ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
Cut Quality ◽  
Machining Parameter

Abrasive water jet machining is frequently used in industry. It is one of the most versatile processes in the world. The basic advantages of abrasive water jet machining is that no heat affected zones or mechanical stresses are left on an abrasive water jet cut surface, high flexibility and small cutting forces. Although this cutting technology includes many advantages, there are some drawbacks. For instance, abrasive water jet cutting can produce tapered edges on the kerf of workpiece being cut. This can limit the potential applications of abrasive water jet cutting, if further machining of the edges is needed to achieve the engineering tolerance required for the part. The machining parameters have a great influence on these phenomena. The aim of this paper is to investigate the cut quality of EN AW-6060 aluminium alloy sheets under abrasive water jets. The experimental results indicate that the feed rate (nozzle traverse speed) of the jet is a significant parameter on the surface morphology.

The Effect of Water Pressure Variation on Cut Surfaces Quality during Abrasive Waterjet Cutting of Austenitic Steels

2014 ◽  
Vol 1029 ◽  
pp. 176-181 ◽  
Author(s):  
Ion Aurel Perianu ◽  
Ion Mitelea ◽  
Viorel Aurel Şerban
Keyword(s):  
Water Pressure ◽  
Austenitic Stainless Steels ◽  
Water Jet ◽  
Pressure Variation ◽  
Austenitic Steels ◽  
Abrasive Waterjet ◽  
Abrasive Water Jet ◽  
Effect Of Water ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting

In this paper research elements regarding the effect of water pressure variation on cut surfaces quality are presented in the field of abrasive water jet cutting of materials hard to process by machining such as austenitic stainless steels, in this case with a thickness of 20 mm. Selection of the optimal cutting process based on technical and economic criteria takes into consideration the type and thickness of the targeted material and also the physical and geometrical quality requirements. The present paper contains experimental research results regarding abrasive water jet cutting of austenitic stainless steel EN 1.4306 (ASTM 304 L) at different values of water pressure. The abrasive material used is Garnet with particle granulation 80 Mesh. By making roughness measurements and hardness examinations of the cut surface an evaluation will be made of the surface quality defining the optimal pressure values.

ISIM Own Contributions on Non-Conventional Abrasive Waterjet Cutting Technologies

2021 ◽  
Vol 890 ◽  
pp. 147-151
Author(s):  
Ion Aurel Perianu ◽  
Gabriela Victoria Mnerie ◽  
Radu Cojocaru ◽  
Emilia Florina Binchiciu
Keyword(s):  
Research Priorities ◽  
Industrial Applications ◽  
Water Jet ◽  
Cutting Process ◽  
Abrasive Waterjet ◽  
Abrasive Water Jet ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
Cutting Equipment ◽  
Different Characteristics

Modern materials cutting operations are traditionally part of the research priorities and also in the production activities of ISIM Timișoara. In the last decade, within the institute, a special emphasis was placed on the development of the abrasive water jet cutting process as well as on implementing the research results obtained into industrial activities. The paper presents own achievements and contributions of ISIM to the development of the abrasive water jet cutting process in the following directions: cutting technologies for materials with different characteristics, innovative new patentable solutions regarding the cutting process respectively important modules in the composition of the water jet cutting equipment, ways to recycle used abrasive waste, solutions to streamline the process. The proposed solutions have been verified with good results in industrial applications, or have been proposed for analysis and development together with specialists in the field from important research units.

Development of ice abrasive waterjet cutting technology

2017 ◽  
Vol 2 (81) ◽  
pp. 76-84
Author(s):  
J. Valentinčič ◽  
A. Lebar ◽  
I. Sabotin ◽  
P. Drešar ◽  
M. Jerman
Keyword(s):  
High Speed ◽  
Power Plants ◽  
Water Jet ◽  
Abrasive Waterjet ◽  
Abrasive Water Jet ◽  
Influence Of Process Parameters ◽  
Cutting Head ◽  
Ice Particles ◽  
Main Challenge ◽  
Awj Cutting

Purpose: Abrasive water jet (AWJ) cutting uses mineral abrasive to cut practically all materials. In ice abrasive water jet (IAWJ) cutting, the ice particles are used as abrasive. IAWJ is under development with the aim to bridge the gap in productivity between the abrasive water jet (AWJ) and water jet (WJ) cutting. It is clean and environmentally friendlier in comparison with AWJ, while its cutting efficiency could be better than WJ. Design/methodology/approach: The main challenge is to provide very cold and thus hard ice particles in the cutting zone, thus cooling the water under high pressure is utilized. Further on, two approaches to obtain ice particles in the water are studied, namely generation of ice particles in the cutting head and generation of ice particles outside of the cutting head and adding them to the jet similar as in AWJ technology. In this process it is essential to monitor and control the temperature occurring in the system. Findings: To have ice particles with suitable mechanical properties in the cutting process, the water have to be precooled, ice particles generated outside the cutting head and later added to the jet. The results show that, contrary to the common believe, the water temperature is not significantly changed when passing through the water nozzle. Research limitations/implications: The presence of ice particles was only indirectly identified. In the future, a special high speed camera will be used to study the influence of process parameters on ice particle distribution. Practical implications: IAWJ technology produces much less sludge (waste abrasive and removed workpiece material mixed with water) than AWJ technology which is beneficial in e.g. disintegration of nuclear power plants. IAWJ technology has also great potential in the food and medical industries for applications, where bacteria growth is not desired. Originality/value: The paper presents the latest achievements of IAWJ technology.

scholarly journals Optimization on Operation Parameters in Reinforced Metal Matrix of AA6066 Composite with HSS and Cu

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Y. Sesharao ◽  
T. Sathish ◽  
Kumaran Palani ◽  
Anjibabu Merneedi ◽  
Natrayan L ◽  
...  
Keyword(s):  
Metal Matrix ◽  
High Speed ◽  
Rank Order ◽  
High Speed Steel ◽  
Steam Pressure ◽  
Cutting Fluid ◽  
Depth Of Cut ◽  
Machining Parameters ◽  
Operation Parameters ◽  
Thrust Forces

This optimization investigation focused on the reinforced metal matrix composite of aluminium alloy. Novel of this work is to fabricate the AA6066 composite with HSS and Cu, continually conduct machining tests, and evaluate the tool wear, surface roughness, and thrust force of the stir-casted specimens. The aluminium composite has 90 percentage of AA6066 alloy reinforcement with six percentage of high-speed steel and four percentage of copper alloy made by the casting method. The fabricated composites’ turning parameters were optimized through the Taguchi method. The turning operation can be done with the help of the normal lathe with the CBN insert tool. The operation parameters such as feed, depth of cut, and steam pressure of the cutting fluid were considered with three different equal intervals in each parameter. In this investigation, the L9 orthogonal array method is used to identify the optimum values of the turning parameters among the considered machining parameters concerning the response such as wear on the turning tool and thrust forces created on machining. The outcome based on the parameters was identified and mentioned as the rank order for individual and combination of all responses with different conditions. Then, the separate and combined optimized input parameters were provided as the conclusion.

Experimental Analysis of Hole Making in GFRP Composite Using Abrasive Water Jet Cutting Technology

2013 ◽  
Vol 325-326 ◽  
pp. 1392-1398 ◽  
Author(s):  
Hussein M. Ali ◽  
Asif Iqbal ◽  
Majid Hashemipour
Keyword(s):  
Composite Materials ◽  
Water Jet ◽  
Cutting Process ◽  
Machining Parameters ◽  
Abrasive Water Jet ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
Gfrp Composite ◽  
Hole Making ◽  
Response Variables

Machining of composite materials for the production of bolt holes is essential in the assembly of the structural frames of many industrial applications of GFRP. Abrasive water jet cutting technology has been used in industry for such purposes. This technology has procured many overlapping applications and as the life of the joint in the assemble structure can be critically affected by the quality of the holes, it is thus important for the industry to understand the application of abrasive water jet cutting process on GFRP composite materials. The aim of the present work is to to assess the influence of abrasive water jet machining parameters on hole making process of woven laminated GFRP material. Statistical approach was used to understand the effects of the predicted variables on the response variables. Analysis of variance (ANOVA) was performed to isolate the effects of the parameters affecting the hole making in abrasive water jet. The result shows that cutting feed, water jet pressure, standoff distance and abrasive flow rate are influential parameters upon the response variables of the abrasive water jet cutting process of GFRP composite, type 3240.

scholarly journals Revised Model of Abrasive Water Jet Cutting for Industrial Use

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4032
Author(s):  
Libor M. Hlaváč
Keyword(s):  
Traverse Speed ◽  
Theoretical Description ◽  
Water Jet ◽  
Analytical Models ◽  
Abrasive Water Jet ◽  
Nozzle Orifice ◽  
Measuring Devices ◽  
Water Jet Cutting ◽  
Improved Model ◽  
Awj Cutting

Research performed by the author in the last decade led him to a revision of his older analytical models used for a description and evaluation of abrasive water jet (AWJ) cutting. The review has shown that the power of 1.5 selected for the traverse speed thirty years ago was influenced by the precision of measuring devices. Therefore, the correlation of results calculated from a theoretical model with the results of experiments performed then led to an increasing of the traverse speed exponent above the value derived from the theoretical base. Contemporary measurements, with more precise devices, show that the power suitable for the traverse speed is essentially the same as the value derived in the theoretical description, i.e., it is equal to “one”. Simultaneously, the replacement of the diameter of the water nozzle (orifice) by the focusing (abrasive) tube diameter in the respective equations has been discussed, because this factor is very important for the AWJ machining. Some applications of the revised model are presented and discussed, particularly the reduced forms for a quick recalculation of the changed conditions. The correlation seems to be very good for the results calculated from the present model and those determined from experiments. The improved model shows potential to be a significant tool for preparation of the control software with higher precision in determination of results and higher calculation speed.

scholarly journals Surface Topography Analysis of Mg-Based Composites with Different Nanoparticle Contents Disintegrated Using Abrasive Water Jet

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5471
Author(s):  
Kumari Bimla Mardi ◽  
Amit Rai Dixit ◽  
Alokesh Pramanik ◽  
Pavol Hvizdos ◽  
Ashis Mallick ◽  
...  
Keyword(s):  
Surface Topography ◽  
Flow Rate ◽  
Water Pressure ◽  
Traverse Speed ◽  
Water Jet ◽  
Abrasive Waterjet ◽  
Maximum Height ◽  
Average Particle ◽  
Abrasive Water Jet ◽  
Metal Matrix Nanocomposites

This study investigated the effect of abrasive water jet kinematic parameters, such as jet traverse speed and water pressure, on the surface of magnesium-based metal matrix nanocomposites (Mg-MMNCs) reinforced with 50 nm (average particle size) Al2O3 particles at concentrations of 0.66 and 1.11 wt.%. The extent of grooving caused by abrasive particles and irregularities in the abrasive waterjet machined surface with respect to traverse speed (20, 40, 250 and 500 mm/min), abrasive flow rate (200 and 300 g/min) and water pressure (100 and 400 MPa) was investigated using surface topography measurements. The results helped to identify the mode of material disintegration during the process. The nanoindentation results show that material softening was decreased in nanocomposites with higher reinforcement content due to the presence of a sufficient amount of nanoparticles (1.11 wt.%), which protected the surface from damage. The values of selected surface roughness profile parameters—average roughness (Ra), maximum height of peak (Rp) and maximum depth of valleys (Rv)—reveal a comparatively smooth surface finish in composites reinforced with 1.11 wt.% at a traverse speed of 500 mm/min. Moreover, abrasive waterjet machining at high water pressure (400 MPa) produced better surface quality due to sufficient material removal and effective cleaning of debris from the machining zone as compared to a low water pressure (100 MPa), low traverse speed (5 mm/min) and low abrasive mass flow rate (200 g/min).

Depth of Penetration and Surface Roughness Analysis of Al6061 cut by Abrasive Water Jet

2021 ◽  
Vol 58 (1) ◽  
pp. 5412-5417
Author(s):  
Prabhu Swamy N R Et al.
Keyword(s):  
Surface Roughness ◽  
Surface Finish ◽  
Traverse Speed ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Average Surface Roughness ◽  
Depth Of Penetration ◽  
Average Surface ◽  
Water Jet Cutting ◽  
Model Equations

In this study, model equations to predict average surface roughness value of abrasive water jet cut aluminium 6061 alloy are developed. Model equations are developed considering water jet pressure, abrasive flow rate and traverse speed of the jet. Model equations help in knowing average surface roughness value on the cutting and deformation wear regions. 27 abrasive water jet cutting experiments are conducted on trapezoidal shaped aluminium 6061 block. Depth of penetration values are found for all experimental cutting conditions. Average surface roughness values are found by non-contact surface roughness tester. Surface roughness testing is carried out along the length of depth of penetration.  Low and high average surface roughness values are noticed on the cutting and deformation wear regions respectively.  Smooth surface finish and rough surface finish with striations are observed on the cutting and deformation wear regions respectively.   

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