Aung Sein - Academia.edu (original) (raw)
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Papers by Aung Sein
The model of milling force is mainly proposed to predict and analyze the cutting process based on... more The model of milling force is mainly proposed to predict and analyze the cutting process based on finite element method in this paper. Firstly, Milling Finite Element model is given based on orthogonal cutting principle, and then the influence laws of cutting parameters on chip formation are analyzed by using different simulation parameters. In addition, the three-dimensional milling forces are obtained from finite element models. Finally, the values of milling force by the milling experiment are also compared and analyzed with the simulation values to verify the feasibility and reasonability. It can be shown that milling forces match well between simulation and experiment results, which can provide many good basic data and analysis methods to optimize the machining parameters, reduce tool wear, and improve the workpiece surface roughness and adapt to the programming strategy of high speed machining.
American journal of mechanical engineering, 2015
The paper presents aspects related to simulation of metal cutting for titanium and its alloys. De... more The paper presents aspects related to simulation of metal cutting for titanium and its alloys. Detailed study on progression and wear mechanism at the cutting edge of carbide tools were carried out at cutting speed of 30, 60 and 90 m/min, feed rate of 0.2 mm/rev. Firstly, milling finite element model is given based on orthogonal cutting principle, and then the influence laws of cutting parameters on chip formation are analyzed by using different simulation parameters. For simulations, the software based on finite element method DEFORM 2D was used. Machining simulations were conducted using Ti6Al4V and uncoated carbide for workpiece and tool material respectively. DEFORM 2D, a widely used software tool employed for modelling and simulating the orthogonal machining process with different cutting speeds and feed rates. The pattern of wear progression on the flank face of the carbide tools consist of three stages for all the cutting speed simulated. Wear mechanism such as abrasive and a...
Computers & Structures, 2002
A finite element model of a two-dimensional orthogonal cutting process is developed. The simulati... more A finite element model of a two-dimensional orthogonal cutting process is developed. The simulation uses standard finite element software together with a special mesh generator that is able to mesh the chip completely with regular quadrilateral elements and a strong mesh refinement in the shear zone for continuous and segmented chips. The techniques of remeshing and to ensure convergence of the implicit calculation is described. Results for the formation of segmented chips are presented and the segmentation process is studied. Of special interest is the occurrence of split shear bands. The influence of the elastic properties and of the cutting speed is also discussed. Ó
Machining Science and Technology, 2005
... Shatla introduced the inverse mapping method to indirectly determine the flow stress data ins... more ... Shatla introduced the inverse mapping method to indirectly determine the flow stress data instead of curve fitting (2020. Shatla , M. , Kerk , C. , and Altan , T. ( 2001 ). Process Modeling in Machining. ... Shatla , M. , Kerk , C. , and Altan , T. ( 2001 ). Process Modeling in Machining. ...
The model of milling force is mainly proposed to predict and analyze the cutting process based on... more The model of milling force is mainly proposed to predict and analyze the cutting process based on finite element method in this paper. Firstly, Milling Finite Element model is given based on orthogonal cutting principle, and then the influence laws of cutting parameters on chip formation are analyzed by using different simulation parameters. In addition, the three-dimensional milling forces are obtained from finite element models. Finally, the values of milling force by the milling experiment are also compared and analyzed with the simulation values to verify the feasibility and reasonability. It can be shown that milling forces match well between simulation and experiment results, which can provide many good basic data and analysis methods to optimize the machining parameters, reduce tool wear, and improve the workpiece surface roughness and adapt to the programming strategy of high speed machining.
American journal of mechanical engineering, 2015
The paper presents aspects related to simulation of metal cutting for titanium and its alloys. De... more The paper presents aspects related to simulation of metal cutting for titanium and its alloys. Detailed study on progression and wear mechanism at the cutting edge of carbide tools were carried out at cutting speed of 30, 60 and 90 m/min, feed rate of 0.2 mm/rev. Firstly, milling finite element model is given based on orthogonal cutting principle, and then the influence laws of cutting parameters on chip formation are analyzed by using different simulation parameters. For simulations, the software based on finite element method DEFORM 2D was used. Machining simulations were conducted using Ti6Al4V and uncoated carbide for workpiece and tool material respectively. DEFORM 2D, a widely used software tool employed for modelling and simulating the orthogonal machining process with different cutting speeds and feed rates. The pattern of wear progression on the flank face of the carbide tools consist of three stages for all the cutting speed simulated. Wear mechanism such as abrasive and a...
Computers & Structures, 2002
A finite element model of a two-dimensional orthogonal cutting process is developed. The simulati... more A finite element model of a two-dimensional orthogonal cutting process is developed. The simulation uses standard finite element software together with a special mesh generator that is able to mesh the chip completely with regular quadrilateral elements and a strong mesh refinement in the shear zone for continuous and segmented chips. The techniques of remeshing and to ensure convergence of the implicit calculation is described. Results for the formation of segmented chips are presented and the segmentation process is studied. Of special interest is the occurrence of split shear bands. The influence of the elastic properties and of the cutting speed is also discussed. Ó
Machining Science and Technology, 2005
... Shatla introduced the inverse mapping method to indirectly determine the flow stress data ins... more ... Shatla introduced the inverse mapping method to indirectly determine the flow stress data instead of curve fitting (2020. Shatla , M. , Kerk , C. , and Altan , T. ( 2001 ). Process Modeling in Machining. ... Shatla , M. , Kerk , C. , and Altan , T. ( 2001 ). Process Modeling in Machining. ...