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Abrasive Waterjet Machining

The Experts below are selected from a list of 558 Experts worldwide ranked by ideXlab platform

Jun Wang – 1st expert on this subject based on the ideXlab platform

  • investigation on erosion mechanism in ultrasonic assisted Abrasive Waterjet Machining
    The International Journal of Advanced Manufacturing Technology, 2018
    Co-Authors: Zhe Lv, Chuanzhen Huang, Jun Wang

    Abstract:

    The Abrasive erosion mechanism in ultrasonic assisted Abrasive Waterjet Machining is investigated in the present study. The process was theoretically analyzed and a numerical model for the Abrasive particle impact process considering the target workpiece vibration was developed. A time-dependent load was imposed on the model boundary to apply the vibration. The model was utilized to investigate the response of target material with explicit dynamic method. Effects of ultrasonic vibration and other process parameters on the material removal and response such as residual stress were investigated. Analysis on erosion process by multiple particles in ultrasonic vibration assisted AWJ was also carried out. The model was finally verified by experiments. The results indicate that the application of ultrasonic vibration can enhance the material removal capacity of the Abrasive particle and intensify the material deformation.

  • A Study on Ultrasonic Torsional Vibration-Assisted Abrasive Waterjet Polishing of Ceramic Materials
    Advanced Materials Research, 2016
    Co-Authors: Yong Wang, Chuanzhen Huang, Jun Wang

    Abstract:

    Abrasive Waterjet Machining is considered as a promising technique in hard-brittle material polishing. In this paper, The ultrasonic torsional vibration is considered to apply on the workpiece to improve the Abrasive Waterjet polishing quality and efficiency. The process parameters in the ultrasonic torsional vibration-assisted Abrasive Waterjet polishing are optimized. The ultrasonic torsional vibration in the role of the Abrasive Waterjet polishing is investigated. The results show that the application of ultrasonic torsional vibration can effect of Abrasive particle movement and increase the critical depth of the ceramic materials.

  • an experimental study of Abrasive Waterjet Machining of ti 6al 4v
    The International Journal of Advanced Manufacturing Technology, 2015
    Co-Authors: Huaizhong Li, Jun Wang

    Abstract:

    This paper presents an experimental study on Abrasive Waterjet (AWJ) Machining of the most commonly used titanium alloy, Ti-6Al-4V. Two types of Machining operations, i.e. drilling (or piercing) and slotting, were conducted. For the drilling experiments, the influences of water pressure and drilling time were investigated. It was found that both the hole depth and diameter increased as drilling time increased but in a decreasing rate. An increase in the water pressure increased both the hole depth and the hole diameter. For the slot cutting, the influence of water pressure and the traverse speed were investigated. A slower traverse speed resulted in a deeper depth of cut. The kerf showed a taper shape with a wider entry on top, and the width decreased as jet cut into the material. At the bottom of the kerf, a pocket was generated. The variation of the depth of cut became insignificant when the traverse speed was increased.

Chuanzhen Huang – 2nd expert on this subject based on the ideXlab platform

  • research on cavitation involved in ultrasonic assisted Abrasive Waterjet Machining
    The International Journal of Advanced Manufacturing Technology, 2019
    Co-Authors: Zhe Lv, Tao Wang, Chuanzhen Huang

    Abstract:

    The cavitation characteristics involved in ultrasonic-assisted Abrasive Waterjet were analyzed in the present study. The fluid field corresponding to ultrasonic-assisted AWJ was investigated through utilizing computational fluid dynamics. A cavitation model was adopted to simulate the mass transfer between water liquid and vapor phases. The evolution of cavitation during the impacting process and the effects of vibration parameters on cavitating characteristics were investigated. Moreover, a set of experiments were performed to evaluate the effects of ultrasonic-induced cavitation on erosion and material removal of ceramics. The results indicated that the evolution of cavitation had dependency on the fluid pressure and turbulence at impacted zone, and the synergetic erosion of microjets and accelerated particles induced by collapsing cavitation bubbles can evidently enhance the material removal. The material removal rate was improved by 82% at most under ultrasonic vibration.

  • numerical research on erosion involved in ultrasonic assisted Abrasive Waterjet Machining
    The International Journal of Advanced Manufacturing Technology, 2019
    Co-Authors: Zhe Lv, Xuesong Chen, Chuanzhen Huang

    Abstract:

    The impact erosion of particle in Abrasive Waterjet has the features of short duration of time and small scale of the deformation area, which lead to difficulty on implementing comprehensive investigation. As a meshless method, smoothed particle hydrodynamics is appropriate for dealing with high strain rate and large deformation issues such as impact dynamics. In this work, the erosive wear of aluminum nitride target material induced by incident particle in ultrasonic-assisted Abrasive Waterjet Machining was investigated through establishing a 3D hybrid smoothed particle hydrodynamics-finite elements model. The results indicated that the parameters such as particle shape, impact angle, and impact velocity have remarkable effects on the erosion mechanism. The ultrasonic vibration influences the dynamic process of particle penetration and the deformation of eroded target material. Multi-impacts were also simulated and the results indicated that the erosion was influenced by the overlapping condition and ultrasonic vibration. The numerical results were verified by the experiments utilizing the specially developed setup.

  • Investigation on flow field of ultrasonic-assisted Abrasive Waterjet using CFD with discrete phase model
    The International Journal of Advanced Manufacturing Technology, 2018
    Co-Authors: Zhe Lv, Y.b. Tian, Chuanzhen Huang

    Abstract:

    The characteristics of flow field have significant influence on impact erosions of containing particles in Abrasive Waterjet Machining. However, measurement of velocity and pressure distributions in flow field is hard to implement. In present study, computational fluid dynamics (CFD) is utilized to model the Abrasive Waterjet flow field in ultrasonic-assisted Abrasive Waterjet Machining with the aid of discrete phase method. The workpiece vibration is simulated by using dynamic mesh method. The effect of ultrasonic vibration on pressure and velocity distributions was investigated, as well as the particle impact parameters such as local impact angle and velocity. The results indicate that the pressure value is lower when vibration is applied on target and the lateral flow along the vibration direction is enhanced and affected the high pressurized water film. Moreover, the particle velocity is higher when vibration is introduced due to the fact that the weakening of stagnation effect owing to the shear of vibrating target surface. In addition, ultrasonic-assisted Abrasive Waterjet erosion experiments were conducted to explore the practical effects on material removal and erosion mechanism. The experimental results verify that application of ultrasonic vibration is considered to facilitate the material removal of Abrasive Waterjet.

Ahmet Hascalik – 3rd expert on this subject based on the ideXlab platform

  • effect of traverse speed on Abrasive Waterjet Machining of age hardened inconel 718 nickel based superalloy
    Materials and Manufacturing Processes, 2010
    Co-Authors: Mustafa Ay, Ulas Caydas, Ahmet Hascalik

    Abstract:

    In this study, the effect of traverse speed on Abrasive Waterjet Machining (AWJM) of Inconel 718 nickel-based superalloy was experimentally investigated. In the experiments, six different traverse speeds of 80, 130, 180, 230, 280, and 330 mm/min were employed. Following the tests, the surface roughness of the machined job, the kerf taper ratio, and kerf wideness were measured. The characteristics of machined surface were also investigated using scanning electron microscope (SEM) and atomic force microscope (AFM). As a consequence, it is observed that the surface roughness and kerf taper ratio tended to increase with traverse speed, while kerf wideness decreased.

  • a study on surface roughness in Abrasive Waterjet Machining process using artificial neural networks and regression analysis method
    Journal of Materials Processing Technology, 2008
    Co-Authors: Ulas Caydas, Ahmet Hascalik

    Abstract:

    In the present study, artificial neural network (ANN) and regression model were developed to predict surface roughness in Abrasive Waterjet Machining (AWJ) process. In the development of predictive models, Machining parameters of traverse speed, Waterjet pressure, standoff distance, Abrasive grit size and Abrasive flow rate were considered as model variables. For this purpose, Taguchi’s design of experiments was carried out in order to collect surface roughness values. A feed forward neural network based on back propagation was made up of 13 input neurons, 22 hidden neurons and one output neuron. The 13 sets of data were randomly selected from orthogonal array for training and residuals were used to check the performance. Analysis of variance (ANOVA) and F-test were used to check the validity of regression model and to determine the significant parameter affecting the surface roughness. The statistical analysis showed that the Waterjet pressure was an utmost parameter on surface roughness. The microstructures of machined surfaces were also studied by scanning electron microscopy (SEM). The SEM investigations revealed that AWJ Machining produced three distinct zones along the cut surface of AA 7075 aluminium alloy and surface striations and waviness were increased significantly with jet pressure.

  • effect of traverse speed on Abrasive Waterjet Machining of ti 6al 4v alloy
    Materials & Design, 2007
    Co-Authors: Ahmet Hascalik, Ulas Caydas, Hakan Gurun

    Abstract:

    Abstract In the presented study, Ti–6Al–4V alloy, known as one of the difficult-to-machine materials using conventional Machining processes, was machined under varying traverse speeds of 60, 80, 120, 150, 200, and 250 mm/min by Abrasive Waterjet (AWJ) Machining. After Machining, the profiles of machined surfaces, kerf geometries and microstructural features of the machined surfaces were examined using surface profilometry and scanning electron microscopy (SEM). The experimental results indicate that the traverse speed of the jet is a significant parameter on the surface morphology, and the widths and features of different regions formed in the cutting surface change according to the traverse speed. It was also observed that the kerf taper ratio and surface roughness increase with increasing traverse speed in chosen conditions.