Abrasive Water Jet

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Radovan Kovacevic - One of the best experts on this subject based on the ideXlab platform.

  • principles of Abrasive Water Jet machining
    2012
    Co-Authors: Andreas W Momber, Radovan Kovacevic
    Abstract:

    Preface.- Nomenclature.- Introduction.- Classification and Characterization of Abrasive Materials.- Generation of Abrasive Water Jets.- Structure and Hydrodynamics of Abrasive Water Jets.- Material-Removal Mechanisms in Abrasive Water-Jet Machining.- Modeling of Abrasive Water Jet Cutting Processes.- Process Parameter Optimization.- Geometry, Topography and Integrity of Abrasive Water-Jet Machined Parts.- Alternative Machining Operations With Abrasive Water Jet.- Control and Supervision of Abrasive Water-Jet Machining Processes.- References.

  • Control and Supervision of Abrasive Water-Jet Machining Processes
    Principles of Abrasive Water Jet Machining, 1998
    Co-Authors: Andreas W Momber, Radovan Kovacevic
    Abstract:

    As in any other machining method, control and supervision of the Abrasive Water-Jet machining improves both the efficiency and quality of the process. Figure 10.1 shows a block diagram of a possible new generation of an Abrasive Water-Jet machining system.

  • Modeling of Abrasive Water-Jet Cutting Processes
    Principles of Abrasive Water Jet Machining, 1998
    Co-Authors: Andreas W Momber, Radovan Kovacevic
    Abstract:

    Over the years, several models are developed to describe the Abrasive Water-Jet cutting process. Generally, these models are attempts to estimate the depth of cut achievable in different materials cut by Abrasive Water Jets under certain process conditions. The reader will find other models, such as for material-removal processes and for Abrasive Water Jet turning, milling, and drilling, in chapter 9. Chapter 8 separately discusses models for geometry and quality aspects, such as cut geometry and surface topography.

Andreas W Momber - One of the best experts on this subject based on the ideXlab platform.

  • principles of Abrasive Water Jet machining
    2012
    Co-Authors: Andreas W Momber, Radovan Kovacevic
    Abstract:

    Preface.- Nomenclature.- Introduction.- Classification and Characterization of Abrasive Materials.- Generation of Abrasive Water Jets.- Structure and Hydrodynamics of Abrasive Water Jets.- Material-Removal Mechanisms in Abrasive Water-Jet Machining.- Modeling of Abrasive Water Jet Cutting Processes.- Process Parameter Optimization.- Geometry, Topography and Integrity of Abrasive Water-Jet Machined Parts.- Alternative Machining Operations With Abrasive Water Jet.- Control and Supervision of Abrasive Water-Jet Machining Processes.- References.

  • The kinetic energy of wear particles generated by AbrasiveWater-Jet erosion
    Journal of Materials Processing Technology, 1998
    Co-Authors: Andreas W Momber
    Abstract:

    Abstract The kinetic energy of wear particles removed by the erosive action of a high-speed mixture of Abrasive particles and Water is estimated, based on a simple analysis and on impact-force measurements of the AbrasiveWater-Jet before and during the material-removal process. The energy involved in the acceleration of the wear particles is about 0.3% of the input energy of the high-speed AbrasiveWater-Jet. The kinetic energy of the wear particles that are removed increases linearly with the erosion depth.

  • Control and Supervision of Abrasive Water-Jet Machining Processes
    Principles of Abrasive Water Jet Machining, 1998
    Co-Authors: Andreas W Momber, Radovan Kovacevic
    Abstract:

    As in any other machining method, control and supervision of the Abrasive Water-Jet machining improves both the efficiency and quality of the process. Figure 10.1 shows a block diagram of a possible new generation of an Abrasive Water-Jet machining system.

  • Modeling of Abrasive Water-Jet Cutting Processes
    Principles of Abrasive Water Jet Machining, 1998
    Co-Authors: Andreas W Momber, Radovan Kovacevic
    Abstract:

    Over the years, several models are developed to describe the Abrasive Water-Jet cutting process. Generally, these models are attempts to estimate the depth of cut achievable in different materials cut by Abrasive Water Jets under certain process conditions. The reader will find other models, such as for material-removal processes and for Abrasive Water Jet turning, milling, and drilling, in chapter 9. Chapter 8 separately discusses models for geometry and quality aspects, such as cut geometry and surface topography.

Rong Guo Hou - One of the best experts on this subject based on the ideXlab platform.

  • Experimental Investigation on the Material Removal of the Ultrasonic Vibration Assisted Abrasive Water Jet Machining Ceramics
    Advances in Materials Science and Engineering, 2017
    Co-Authors: Tao Wang, Rong Guo Hou
    Abstract:

    The ultrasonic vibration activated in the Abrasive Water Jet nozzle is used to enhance the capability of the Abrasive Water Jet machinery. The experiment devices of the ultrasonic vibration assisted Abrasive Water Jet are established; they are composed of the ultrasonic vibration producing device, the Abrasive supplying device, the Abrasive Water Jet nozzle, the Water Jet intensifier pump, and so on. And the effect of process parameters such as the vibration amplitude, the system working pressure, the stand-off, and the Abrasive diameter on the ceramics material removal is studied. The experimental result indicates that the depth and the volume removal are increased when the ultrasonic vibration is added on Abrasive Water Jet. With the increase of vibration amplitude, the depth and the volume of material removal are also increased. The other parameters of the ultrasonic vibration assisted Abrasive Water Jet also have an important role in the improvement of ceramic material erosion efficiency.

  • Study on Experiment Device of Abrasive Water Jet Micro-Turning
    Advanced Materials Research, 2012
    Co-Authors: Rong Guo Hou, Chuanzhen Huang, Hongtao Zhu, Jun Wang
    Abstract:

    An Abrasive Water Jet micro-turning experiment device is designed to solve the problem for micromachining the revolving parts. This device is composed of the machine body, hydraulic system, collection devices and control equipment etc. This paper emphasizes on the structure design of the moving parts of the Abrasive Water Jet turning process, clamp, lathe bed, Abrasive Water Jet injecting system and collection system. The turning spindle system and feed drive mechanism are designed, and the strength, stiffness and precision of the ball screw transmission mechanism are calculated and checked to meet the needs of the Abrasive Water Jet micro-turning experiments.

  • Study of the Floor Typed Abrasive Water Jet Spatial Machining Robot
    Key Engineering Materials, 2011
    Co-Authors: Rong Guo Hou, Chuanzhen Huang, Hongtao Zhu, Hanlian Liu, Bin Zou
    Abstract:

    A floor typed spatial robot of Abrasive Water Jet machining is designed, which can be applied to machine three-dimensional complicated work-pieces. Its merits are simple structure and flexible moving. The structure and transmission programmer are discussed in detail. The working range of the Abrasive Water Jet robot is analyzed to meet the need of the various sized work-pieces. The motion of the each joint is realized by means of various transmission programmers. The precise movement of the robot is realized by the stepping motor, and the required power of the robot is calculated.

Sergej Hloch - One of the best experts on this subject based on the ideXlab platform.

  • Measurement of thermal emission during cutting of materials using Abrasive Water Jet
    Thermal Science, 2017
    Co-Authors: Vincent Perzel, Marián Flimel, Jolanta B. Krolczyk, S Aleksandar Sedmak, Alessandro Ruggiero, Drazan Kozak, Antun Stoić, Grzegorz Krolczyk, Sergej Hloch
    Abstract:

    This article deals with measurement of the thermal gradient on material during Abrasive Water Jet cutting. The temperature was measured by thermocamera before the technological process started, during the Abrasive Water Jet cutting process technology, and just after the cutting process. We performed measurements on several types of materials. We calculated the approximate amount of energy during the Abrasive Water Jet cutting process technology that changes into thermoenergy, which is the current Water pressure drained in a catcher tank.

  • Measurement of Fine Grain Copper Surface Texture Created by Abrasive Water Jet Cutting
    Strojarstvo, 2009
    Co-Authors: Petr Hlaváček, Sergej Hloch, Jan Valicek, Miroslav Greger, Josef Foldyna, Željko Ivandić, Libor Sitek, Milena Kušnerová, Michal Zeleňák
    Abstract:

    The paper presents results of experiments performed on copper with commercial purity to determine the influence of material grain size on both mechanical properties and texture of surface machined by Abrasive Water Jet. An Equal Channel Angular Extrusion technology was used for creation of fine-grain copper samples. Hardness and grain size of fine-grain copper were measured, and, subsequently, surface of prepared copper samples was machined by Abrasive Water Jet technology. Surface irregularities produced by the Abrasive Water Jet were evaluated by means of surface profile roughness parameter Ra. It was found that the grain size of the material represents important factoror affffecting the final shape of surface topography in case of Abrasive Water Jet machining.

  • technical possibilities of noise reduction in material cutting by Abrasive Water Jet
    Strojarstvo, 2009
    Co-Authors: Agata Radvanska, Todor Ergic, željko Ivandic, Sergej Hloch, Jan Valicek, Jana Mullerova
    Abstract:

    Th e technical procedure of noise reduction in material cutting by Abrasive Water-Jet is described in this paper. The paper is aimed at the implementation of technicchnical possibilities of noise reduction in the cutting of material by Abrasive Water-Jet technology. Both the theoretical and experimental investigations were performed to verify and specify the new findings in the reduction of acoustic sound pressure at Abrasive Water-Jet machining of engineering materials. By means of identification, the influence of pressure and traverse speed on acoustic sound pressure level LAeq was identified. Furthermore, a possible way of acoustic pressure level reduction at the technological node of material cuttining by Abrasive Water-Jet by means of technically relatively simple adjustment, is described.

Tang Puhua - One of the best experts on this subject based on the ideXlab platform.

  • Simulation and analysis of flow field in Abrasive Water Jet nozzle
    2011 International Conference on Consumer Electronics Communications and Networks (CECNet), 2011
    Co-Authors: Lei Yuyong, Wang Rongjuan, Jiang Daijun, Liu Kefu, Tang Puhua
    Abstract:

    Numerical simulation of flow field inside Abrasive Water Jet nozzle on steady, turbulence, two-phase flow conditions was carried out based on FLUENT. The main geometric parameters of Abrasive Water Jet nozzle were analyzed. The results show that the smaller the contraction angle a of the focusing tube, the better flow field inside Abrasive Water Jet nozzle is. Also smaller contraction angle avoids Abrasive gathering at the entrance of the focusing tube. The smaller the outlet diameter of focusing tube, the greater velocity of the Abrasive can be obtained. On the other hand, the smaller the outlet diameter of focusing tube is, the smaller negative pressure inside the mixing chamber exists. Consequently Abrasive inhalation is not good. Outlet diameter of focusing tube should be in the range of 3 times of the jewel orifice. The results show also that the length of the focusing tube has significant effect on the outlet velocity of Abrasive. In order to achieve maximum speed of Abrasive, the length of cylinder part of focusing tube should be in the range of 30 times of the outlet diameter. Simulation of flow field inside Abrasive Water Jet nozzle and analysis of parameters of the focusing tube provide basis in design of nozzle for Abrasive Water Jet.

  • Artificial neural network model of Abrasive Water Jet cutting stainless steel process
    2010 International Conference on Mechanic Automation and Control Engineering, 2010
    Co-Authors: Lei Yuyong, Tang Puhua, Jiang Daijun, Liu Kefu
    Abstract:

    Abrasive Water Jet is one of the advanced green machining tools and its advantages are well known. In order to obtain a product with high surface quality, the Abrasive Water Jet machining process must be precisely controlled. Based on the artificial neural network, a model for the Abrasive Water Jet cutting stainless steel process was built. The artificial neural network was then trained based on sample data set using improved BP algorithm. The trained network establishes nonlinear relationships among the parameters of Abrasive Water Jet cutting process and cutting surface quality. Consequently the surface quality of the part can be indirectly controlled by adjusting the cutting speed of Water Jet. The satisfied results were obtained using the trained artificial neural network model through the check data set.

  • Experimental Study on Three Dimensional Machining Using Micro Abrasive Water Jet
    Journal of Xihua University, 2010
    Co-Authors: Tang Puhua
    Abstract:

    Three dimensional machining using micro Abrasive Water Jet was experimentally studied.A specially designed cutting head for micro Abrasive Water Jet,in which the inside diameter of orifice and focusing tube is 127μm and 300μm respectively,while the average diameter of silicon carbide solid Abrasives is 25μm,was used during experiments.An auger mechanism was used to feed the micro Abrasives to mixing chamber of cutting head directly.Then the micro Abrasives were mixed with Water and accelerated by Water Jet in focusing tube,thereafter the micro Abrasive Water Jet was generated.The auger mechanism was driven by an electrical step motor.Therefore the flow rate of Abrasives can be precisely controlled by regulating the rotating speed of the electrical step motor.The cutting head was then mounted on a numeric controlled machine tool with four axes.Thus the three dimensional machining can be experimented.It was shown that the cutting energy of micro Abrasive Water Jet could be well controlled by regulating the flow rate of micro Abrasives.For a given material,if the feed rate of micro Abrasive Water Jet was kept unchanged,then the cutting depth of the material varied with the flow rate of micro Abrasives.Consequently,three dimensional machining was realized.Micro Abrasive Water Jet has a wide application in fabrication of semiconductor,manufacturing of micro mechatronic system as well as optic devices etc.