Showing 6 results for Abrasive Water Jet
, Khalil Khalili, Abolfazl Foorginejad, Jawad Ashory,
Volume 13, Issue 8 (11-2013)
Abstract
Abstract- In this paper, it is shown how to use the recently developed Firefly Algorithm to optimize abrasive water-jet cutting as a nonlinear multi-parameter process. Back propagation neural network were developed to predict surface roughness in abrasive water-jet cutting (AWJ) process. In the development of predictive models, machining parameters of traverse speed, water-jet pressure, standoff distance and abrasive flow rate were considered as model variables. Firefly Algorithm by using back propagation neural network optimizes glass surface roughness in abrasive water-jet cutting and proposes appropriate parameters for minimum surface roughness. Testing results demonstrate that the model is suitable for predicting the response parameters. However this algorithm has not be tested for practical problems, the results showed this algorithm applicable for processes with complex nature.
Hossein Amirabadi, Abolfazl Foorginejad, Milad Ahmadi Mojavery,
Volume 14, Issue 16 (3-2015)
Abstract
Abrasive water jet cutting process can produce tapered edges on cutting kerf. This problem can limit the applications of abrasive water jet cutting process and in some cases it is necessary another edge preparation process. In this paper, an experimental investigation kerf characteristics of Ti-6Al-4V titanium alloy under abrasive water jet cutting is presented. In this regards, it is shown how to use the hybrid approach of Taguchi method and principal component analysis to optimize abrasive water jet cutting are used in this paper. The abrasive water jet cutting process input parameters effect on material removal rate and the characteristics of the surface. A considerable effort was made in understanding the influence of the system operational process parameters such as water jet pressure, traverse speed, abrasive flow rate, and standoff distance. Due to appropriate selecting abrasive water jet cutting process parameters leads to optimizing of kerf characteristics include top kerf width, kerf tapper and kerf deviation, therefore it is important to select appropriate input parameters. The obtained results from this method show that the hybrid approach of Taguchi method and principal component analysis is a suitable solution for optimizing of abrasive water jet cutting process.
F. Pashmforoush, A. Hassanpour Babajan, R. Beyraghi Baranlou,
Volume 20, Issue 4 (4-2020)
Abstract
In this study, an abrasive water jet machining process was used to evaluate the machinability of Hardox 400 steel, as one of the most widely used materials in the sheet metal industry. In this regard, surface roughness and geometrical tolerances (flatness, parallelism, and perpendicularity) were considered as the machining outputs, and water jet pressure, the weight percentage of abrasive particles, nozzle gap and feed rate were considered as the process input parameters. Followed by machining tests, the measurement of geometrical tolerances and surface roughness was performed through coordinate measuring machine (CMM) and surface roughness tester, respectively. The obtained results indicate that by the increase of jet pressure, decrease of feed rate, decrease of nozzle gap and increase of abrasives particles weight fraction, the surface quality improves and the geometrical errors reduce. Also, it was observed that the best surface roughness and geometrical tolerances have been obtained in the case of water jet pressure of 300 MPa, the feed rate of 10 mm/min, the abrasive weight percentage of 30% and nozzle gap of 1 mm. By repeating the experimental tests, it was shown that the relative error of the obtained results is less than 10%, which indicates the high repeatability of the results.
H. Emami, E. Shakouri , P. Saraeian ,
Volume 20, Issue 7 (6-2020)
Abstract
Aluminum alloys, due to their high variety and favorable mechanical properties, are widely used in industries. Aluminum alloy 111H-5754 due to its properties such as high strength to weight ratio, ductility, toughness, and corrosion resistance, are applied in the manufacture of automotive body, offshore, and offshore oil equipment. The presence of 3% magnesium in the chemical structure of this alloy makes it susceptible to heat and therefore, it is not possible to perform most of the traditional machining processes on it. Water jet machining with abrasive particles (AWJM), because of the use of water and abrasive particles as cutting tools, can be a good method for machining these materials. In the present study, the effect of water jet and abrasive particle machining process parameters, including water jet pressure, traverse speed and loading coefficient on surface roughness, angle of striation, and burr formation in aluminum alloy 111H-5754 samples is discussed. The results showed that after traverse speed, water jet pressure and loading coefficient have the most effects on the surface quality characteristics, respectively. So, for a loading factor of 45% and a jet pressure of 300MPa, increasing the traverse speed from 200 to 300mm/min, the surface roughness value in the smooth area is about 50%, and the angle of striation of the lines in the rough area, increased by about 25%.
Zahra Karimi Shamsabadi , Aboulfazl Foorginejad, Saeid Farsad,
Volume 22, Issue 10 (10-2022)
Abstract
abrasive water jet is one of the most popular cutting methods today due to its ability and unique features such as the ability to cut complex shapes as well as the wide range of materials and non - creation of thermal distortion at the cutting site. The accuracy of the process is mainly due to selecting the cutting parameters. The sheet used in this study is aluminum 7075 with a thickness of 25 mm. In this research, for water jet pressure, forward speed and nozzle distance to the surface of the workpiece, three surfaces and for the impingement angle of two surfaces were considered. In order to investigate the quality of the cut - off area, the effect of process parameters on the high and low width of the cut section and also the cut - surface slope is investigated. Finally, the cut gap created by this process has special geometrical features that in some cases is the limitation of the process. The results showed that the change in the direction of the water jet from the perpendicular to the surface of the work piece, although the width of the cutting crack cannot be changed, the surface quality decreases and the cutting surface slope increases.
Zeinab Mandizadeh , Fatemeh Ramezani , Mohammad Khalili ,
Volume 23, Issue 10 (10-2023)
Abstract
Achieving optimal parameters in production processes is crucial in the military industry, as the products are highly complicated and resistant. Because there is no heat generation in the cutting area, abrasive water jet machining is a particularly popular procedure. This study looked into how input variables affected the abrasive water jet machining of rolled homogenous armour steel. The material removal rate, surface roughness, and Kerf angle regression equations were analyzed using the E-fast method of statistical sensitivity analysis. The findings demonstrated that the standoff distance, with a 74% impact, is the most effective parameter on the kerf angle, and the jet traversal speed, with a 95% and 50% impact on the material removal rate and surface roughness, respectively. In addition, pressure had the least effect on three variables of material removal rate, surface roughness and kerf angle.
