An Investigation of Hole Machining Process on a Carbon-Fiber Reinforced Plastic Sheet by Abrasive Waterjet

2016 ◽  
Vol 1136 ◽  
pp. 113-118 ◽  
Author(s):  
Kunlapat Thongkaew ◽  
Jun Wang ◽  
Guan Heng Yeoh
Keyword(s):  
Carbon Fiber ◽  
Process Parameters ◽  
Water Pressure ◽  
Traverse Speed ◽  
Hole Diameter ◽  
Abrasive Waterjet ◽  
Hole Size ◽  
Hole Quality ◽  
Hole Wall ◽  
Hole Machining

An experimental investigation of the hole machining performance for woven carbon-fiber reinforced PEEK (polyetheretherketone) sheets by an abrasive waterjet (AWJ) is presented. It is shown that AWJ machining can produce good quality holes if the cutting parameters are properly selected. Plausible trends of the hole quality with respect to the process parameters are discussed. Nozzle traverse speed and intended or programmed hole size are found to have a significant effect on the diameter error of the machined holes, hole roundness, and hole wall inclination angle, while water pressure and abrasive mass flow rate exhibit an insignificant effect. An increase in the traverse speed decreases the overall hole quality, while an increase in the programmed hole diameter decreases the hole diameter error and roundness error, but increases the hole wall inclination. There is not any clear trend of the hole wall surface roughness with respect to the process parameters. Moreover, high water pressures may result in hole defects, such as entrance surface chipping, delamination, internal cracking and fiber pull-out. It is found that the optimum process parameters are about 200 MPa water pressure, 2 mm/s nozzle traverse speed and 7.0 g/s abrasive mass flow rate. Recommendations are made for compensating for the hole size deviation and empirical models are fianlly developed for these hole characteristics.

EXPERIMENTAL STUDY OF SURFACE ROUGHNESS AND TAPER ANGLE IN ABRASIVE WATER JET MACHINING OF 7075 ALUMINUM COMPOSITE USING RESPONSE SURFACE METHODOLOGY

2019 ◽  
Vol 27 (03) ◽  
pp. 1950112 ◽  
Author(s):  
A. SHANMUGAM ◽  
K. KRISHNAMURTHY ◽  
T. MOHANRAJ
Keyword(s):  
Surface Roughness ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Process Parameters ◽  
Water Pressure ◽  
Traverse Speed ◽  
Standoff Distance ◽  
Abrasive Waterjet ◽  
Machined Surface ◽  
Taper Angle

Surface roughness and taper angle of an abrasive waterjet machined surface of 7075 Aluminum metal matrix composite were deliberately studied. Response surface methodology design of experiments and analysis of variance were used to design the experiments and to identify the effect of process parameters on surface roughness and taper angle. The jet traverse speed and jet pressure were the most significant process parameters which influence the surface roughness and taper angle, respectively. Increasing the pressure and jet traverse speed results in increasing the surface roughness and taper angle. At the same time, decreasing the standoff distance and jet traverse speed possibly enhances both the responses. The optimal process parameters of 1[Formula: see text]mm as standoff distance, 192[Formula: see text]MPa as water pressure and 30[Formula: see text]mm[Formula: see text]min[Formula: see text] as jet traverse speed were identified to obtain the minimum value of surface roughness and taper angle. Based on the optimal parameters, the confirmation test was conducted. The mathematical equation was obtained from the experimental data using regression analysis; it was observed that the error was less than 5% of the experimentally measured values.

Surface Characteristics of Ceramics Milled with Abrasive Waterjet Technology

2007 ◽  
Vol 329 ◽  
pp. 335-340 ◽  
Author(s):  
Yan Xia Feng ◽  
Chuan Zhen Huang ◽  
Jun Wang ◽  
X.Y. Lu ◽  
Hong Tao Zhu
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Water Pressure ◽  
Surface Characteristics ◽  
Traverse Speed ◽  
Standoff Distance ◽  
Abrasive Waterjet ◽  
Optimum Speed ◽  
Milled Surface ◽  
Si3n4 Ceramics

The surface characteristics of Si3N4 ceramics milled with abrasive waterjet milling technology is studied. The milled surface characteristics and the effect of process parameters on milled surface roughness are analyzed. The results show that the milled surface roughness ranges between 0.55 and 1.1um at the milling conditions under consideration and is changed with the change of process parameters. The milled surface roughness will be significantly decreased at the milling conditions of lower water pressure and larger lateral spacing. The effect of nozzle traverse speed on milled surface roughness is complex, but a traverse speed of 1000mm/min is the optimum speed for AWJ milling Si3N4 ceramics. The milled surface roughness first decreases then increases with an enhancement of standoff distance from 10mm to 30mm, and it also significantly decreases with the increase in abrasive mesh. Therefore, the medium standoff distance of 20mm and finer abrasive are the optimum conditions for AWJ milling Si3N4 ceramics with the process parameters under consideration.

An Experimental Study on Milling Al2O3 Ceramics with Abrasive Waterjet

2007 ◽  
Vol 339 ◽  
pp. 500-504 ◽  
Author(s):  
Yan Xia Feng ◽  
Chuan Zhen Huang ◽  
Jun Wang ◽  
Rong Guo Hou ◽  
X.Y. Lu
Keyword(s):  
Surface Quality ◽  
Process Parameters ◽  
Removal Rate ◽  
Water Pressure ◽  
Traverse Speed ◽  
Abrasive Waterjet ◽  
Machining Performance ◽  
Machined Surface ◽  
Machined Surface Quality ◽  
Material Volume

The machining performance of Al2O3 ceramics is studied by abrasive waterjet (AWJ) milling experiment. The machined surface characteristics and the effect of process parameters on machined surface quality are analyzed. The results showed that the nozzle traverse speed and traverse feed have a strong effect on the machined surface quality. The effect of process parameters on material volume removal rate and the milling depth is also researched. The results indicated that the material volume removal rate and the milling depth would be increased at the milling conditions of higher water pressure and bigger standoff distance. However, the milling depth will decrease at the milling conditions of higher traverse speed and higher traverse feed, and the material volume removal rate has a complex variation.

scholarly journals Experimental Exploration of Hybrid Metal Matrix Composite using Abrasive Water Jet Machining

2019 ◽  
Vol 9 (2) ◽  
pp. 1872-1875
Author(s):  
Barath M ◽  
◽  
Rajesh S ◽  
Duraimurugan P ◽  
◽  
...  
Keyword(s):  
Surface Roughness ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Water Pressure ◽  
Traverse Speed ◽  
Abrasive Waterjet ◽  
Force Microscopy ◽  
Business Applications ◽  
Hybrid Metal Matrix Composite

The abrasive mixed waterjet was with success utilized to chop several materials together with steel, metal and glass for a spread of business applications. This work focuses on surface roughness of hybrid metal matrix composite (AA6061, Al2O3, B4C). Machining was applied by AWJM (Abrasive Waterjet Cutting) at completely different parameters Water pressure, Traverse speed, Abrasive flow and stand-off distance. The reinforced composite was analyzed exploitation FE SEM (Field Emission Scanning lepton Microscope) and distribution of reinforced was studied by AFM (Atomic Force Microscopy). For optimum results surface roughness was calculated.

scholarly journals Experimental Analysis and Soft Computing Modeling of Abrasive Waterjet Milling of Steel Workpieces

2020 ◽  
Vol 318 ◽  
pp. 01031
Author(s):  
Panagiotis Karmiris-Obratański ◽  
Nikolaos E. Karkalos ◽  
Anastasios Tzotzis ◽  
Panagiotis Kyratsis ◽  
Angelos P. Markopoulos
Keyword(s):  
Soft Computing ◽  
Process Parameters ◽  
High Efficiency ◽  
Traverse Speed ◽  
Abrasive Waterjet ◽  
Machining Processes ◽  
Metalworking Industry ◽  
Complex Features ◽  
Alternative Processes ◽  
Conventional Machining

Conventional machining processes such as turning, milling and drilling have long been prominent in the metalworking industry but alternative processes which do not require the use of a cutting tool in order to conduct material removal have also been proven to be sufficiently capable of achieving high efficiency in various cases. In particular, Abrasive Waterjet (AWJ) machining can be regarded as a rather appropriate choice for cutting operations, taking into consideration that it involves no heat affected zones, is able to process all material types and create a variety of complex features with success. In the present work, a comprehensive study on the effect of four process parameters, namely jet traverse speed, stand-off distance, abrasive mass flow rate and jet pressure on the width and depth of machined slots on a steel workpiece is conducted. The results are first analyzed with statistical methods in order to determine the effect and the relative importance of each parameter on the produced width and depth of the slots. Finally, these results are used to develop soft computing predictive models based on Artificial Neural Networks (ANN), which can efficiently relate the process parameters with its outcome.

Multiresponse Analysis in Abrasive Waterjet Machining Process on AA 6351

2014 ◽  
Vol 4 (4) ◽  
pp. 38-48 ◽  
Author(s):  
Naresh Babu Munuswamy ◽  
M. Nambi Krishnan
Keyword(s):  
Surface Roughness ◽  
Optimal Parameter ◽  
Water Pressure ◽  
Traverse Speed ◽  
Machining Process ◽  
Abrasive Waterjet ◽  
Abrasive Waterjet Machining ◽  
Waterjet Machining ◽  
Kerf Angle ◽  
Grey Relational

This study investigates optimal parameter setting in abrasive waterjet machining (AWJM) on aluminium alloy AA 6351, using taguchi based Grey Relational Analysis (GRA) is been reported. The water pressure, traverse speed and stand-off-distance were chosen as the process parameters in this study. An L9 orthogonal matrix array is used for the experimental plan. The performance characteristics which include surface roughness (Ra) and kerf angle (KA) are considered. The results indicate that surface roughness and kerf angle decreases, with increase in water pressure and decrease in traverse speed. Analysis of variance (ANOVA) illustrates that traverse speed is the major parameter (89.7%) for reducing surface roughness and kerf angle, followed by water pressure (5.85%) and standoff distance (2%) respectively. The confirmation results reveal that surface roughness reduced by 16% and kerf angle reduced by 47%. Furthermore, the surfaces were examined under scanning electron microscope (SEM) and atomic force microscope (AFM) for a detailed study

Effect of Process Parameters on Depth of Penetration & Surface Roughness in Abrasive Waterjet Cutting of Copper

2019 ◽  
Vol 895 ◽  
pp. 301-306
Author(s):  
Keshav Kashyap ◽  
S. Srinivas
Keyword(s):  
Surface Roughness ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Process Parameters ◽  
Flow Rate ◽  
Traverse Speed ◽  
High Water ◽  
Water Jet ◽  
Abrasive Waterjet ◽  
Depth Of Penetration

This study evaluates the effect of process parameters on depth of penetration and surface roughness in abrasive waterjet (AWJ) cutting of copper. Full factorial experiments are carried out on trapezoidal blocks for each of the three abrasive particle sizes used. Experimental parameters - abrasive mass flow rate, water jet pressure and traverse speed are varied at three levels. Main effects and contributions of process parameters to depth of penetration and surface roughness is calculated. From the data, it is observed that, high abrasive mass flow rate, high water jet pressure and low traverse speed resulted in higher depth of penetration and a high abrasive mass flow rate, high water jet pressure and low traverse speed resulted in lesser Ra value. Using experimental data a statistical model for predicting depth of penetration & surface roughness is developed. Error between experimental and statistical values are compared to validate the statistical model. The maximum DOP of 49.32mm was observed at AMFR=405.4 g/min, P=300 MPa, TS=60 mm/min, MS=60 Mesh and minimum DOP of 4.27mm was observed at AMFR=200 g/min, P=100 MPa, TS=90 mm/min, MS=80 Mesh.

A Study on Erosion of Alumina Wafer in Abrasive Water Jet Machining

2014 ◽  
Vol 1017 ◽  
pp. 228-233 ◽  
Author(s):  
Yong Wang ◽  
Hong Tao Zhu ◽  
Chuan Zhen Huang ◽  
Jun Wang ◽  
Peng Yao ◽  
...  
Keyword(s):  
Process Parameters ◽  
Water Pressure ◽  
Abrasive Particle ◽  
Particle Diameter ◽  
Water Jet ◽  
Abrasive Waterjet ◽  
Abrasive Water Jet ◽  
Alumina Ceramics ◽  
Abrasive Water Jet Machining ◽  
Jet Impact

Abrasive water jet machining is considered as a promising technique in hard and brittle material processing. This paper studies the erosion performance of the alumina ceramics in the different process parameters. In the erosion experiments, alumina ceramics wafers were eroded by the abrasive waterjet machining. The single factor experiments were carried out to understand the effect of different process parameters (jet impact angle, standoff distance, water pressure, abrasive particle diameter) on the material removal rate (MRR), the removal depth and surface roughness (Ra). The experimental results can provide guidance for alumina ceramics abrasive water jet cutting and polishing.

Cutting Force Dynamics as a Tool for Surface Profile Monitoring in AWJ

1995 ◽  
Vol 117 (3) ◽  
pp. 340-350 ◽  
Author(s):  
R. Kovacevic ◽  
R. Mohan ◽  
Y. M. Zhang
Keyword(s):  
Normal Force ◽  
Moving Average ◽  
Water Pressure ◽  
Model Identification ◽  
Surface Profile ◽  
Pressure Change ◽  
Traverse Speed ◽  
Abrasive Waterjet ◽  
Dynamic Force ◽  
Distance Method

Abrasive waterjet cut surface is characterized using static and dynamic characterization techniques. A novel method of auto regressive moving average model identification called model distance method is utilized here for surface profile and dynamic force characterization. More information about the surface profile generating mechanism is derived through wavelength decomposition of the ARMA models. The dynamic workpiece normal force in abrasive waterjet is influenced by process parameters such as fluctuations in water pressure, change in abrasive flow rate, vibration of the positioning system, traverse speed, nozzle diameter, etc. An attempt has been made in this paper to link the dynamics of the process to the quality of the generated surface. The feasibility of using the dynamic workpiece normal force as a parameter for on-line monitoring of the surface profile generated by abrasive waterjet is also investigated.

EXPERIMENTAL INVESTIGATION ON ABRASIVE WATERJET MACHINING OF FIBRE VINYL ESTER COMPOSITE

2019 ◽  
Vol 14 (3) ◽  
Author(s):  
Puneet Kumar ◽  
Bhavik Tank ◽  
Ravi Kant
Keyword(s):  
Surface Roughness ◽  
Vinyl Ester ◽  
Water Pressure ◽  
Traverse Speed ◽  
Abrasive Waterjet ◽  
Machining Processes ◽  
Significant Parameter ◽  
Abrasive Water Jet Machining ◽  
Abrasive Waterjet Machining ◽  
Waterjet Machining

Abrasive water jet machining (AWJM) is one of the most developed non-traditional machining processes. It is generally used to cut difficult to cut materials like composites. The present study is focused on machining of carbon fiber vinyl ester composite with AWJM. The effect of process parameters namely water pressure, standoff distance and traverse speed on surface roughness and kerf tapper is studied. Design of experiment is done by using Taguchi L16 orthogonal array. It is observed that water pressure is the most significant parameter followed by traverse speed. It is found that with the increase in water pressure and decrease in traverse speed of AWJM, surface roughness and kerf tapper of machined samples decreases.

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