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.

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.

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.

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 Process Capability and Average Roughness in Abrasive Water Jet Cutting Process of Stainless Steel

2018 ◽  
Vol 8 (3) ◽  
pp. 2931-2936
Author(s):  
M. Boujelbene
Keyword(s):  
Stainless Steel ◽  
Process Capability ◽  
Water Jet ◽  
Process Capability Index ◽  
Abrasive Water Jet ◽  
Process Capability Analysis ◽  
Capability Index ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
Capability Analysis

Process capability analysis is frequently employed to evaluate if a product or a process can meet the customer’s requirement. In general, process capability analysis can be represented by using the process capability index. Until now, the process capability index was frequently used for manufacturing processes with quantitative characteristics. However, for a process with qualitative characteristic like cutting surface, the data’s type and single specification caused limitations of using the process capability index. Taguchi developed a surface quality by abrasive water jet cutting or quadratic quality loss function to address such issues. In this study, we intend to construct a measurable index which incorporates the process capability index philosophy concept to analyze the process capability with the consideration of the qualitative surface roughness. The manufacturers can employ the proposed index to self-assess the process capability. The objective of this study was to examine the effects of abrasive water jet machining variables like cutting speed of the stainless steel material. The roughness of the varied surface through the cut depth was also measured and determined as a process capability index of 3 zones machined surface.

Quantification of Energy Absorption Capability in Abrasive Water Jet Machining

1995 ◽  
Vol 209 (6) ◽  
pp. 491-498 ◽  
Author(s):  
A W Momber ◽  
R Kovacevic
Keyword(s):  
Mathematical Model ◽  
Stainless Steel ◽  
Energy Absorption ◽  
Water Jet ◽  
Order Equation ◽  
Second Order ◽  
Depth Of Cut ◽  
Relative Depth ◽  
Abrasive Water Jet ◽  
Abrasive Water Jet Machining

The paper contains a mathematical model for the estimation of the energy absorption capability of materials during abrasive water jet machining based on an energy balance inside the workpiece. A parameter χ(h) is defined to describe and calculate the energy absorption capability. A method for the estimation of this parameter is developed based on a parabolic striation model. It is shown that the energy absorption depends on the depth of cut following a second-order equation. The relation between the relative depth of cut h/hmax and the energy absorption capability χ(h) can also be described by a second-order equation. For such materials as aluminium, cast iron and stainless steel a critical point of abrasive water jet energy absorption is detected at a depth of cut of h = 0.52hmax, which corresponds to a striation angle of about 75°.

scholarly journals Influence of the process conditions on the roundness deviation of cylindrical holes produced by means of abrasive water jet cutting

Mechanik ◽  
2017 ◽  
Vol 90 (1) ◽  
pp. 64-65 ◽  
Author(s):  
Daniel Krajcarz ◽  
Sławomir Spadło
Keyword(s):  
Cutting Speed ◽  
Water Jet ◽  
Process Conditions ◽  
Abrasive Water Jet ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
Cylindrical Holes ◽  
Roundness Deviation ◽  
Input Variables ◽  
Made In

This paper discusses experimental results concerning the geometric accuracy of cylindrical holes. The input variables were the cutting speed, the distance between the abrasive water jet nozzle and the workpiece, and the abrasive mass flow rate. The output variables were roundness deviation, which were measured in three sections. The holes were made in aluminum alloy by a high-pressure jet of water containing almandine garnet as an abrasive substance.

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