A Study on the Cellphone Cover-Forming Process of Titanium Alloys Using the Finite Element Method

2011 ◽  
Vol 121-126 ◽  
pp. 1550-1554
Author(s):  
Dyi Cheng Chen ◽  
Ming Ren Chen ◽  
Fung Ling Nian
Keyword(s):  
Finite Element ◽  
Effective Strain ◽  
Simulation Software ◽  
Work Piece ◽  
Process Conditions ◽  
Forming Process ◽  
Rigid Plastic ◽  
Finite Element Software ◽  
Plastic Deformation Behavior ◽  
3D Software

In recent years, the style of 3C products demanded thin and small results due to gradual trends, though most of the industry is forming a continuous manner of stamping. However, the material thickness cannot be changed in products. This paper employs the rigid-plastic finite element (FE) DEFORMTM 3D software to investigate the plastic deformation behavior of titanium alloy (Ti-6Al-4V) workpiece for the forming processes of cellphone covers. In addition, this study utilizes the Solid Work 2010 3D graphics-rendering software for modeling, which is simulation software used to import various forming process conditions. The software analyzes the effective strain, the effective stress, critical damage value, and the die radius load distribution of the work-piece. Furthermore, this study used simulative software to analyze its forming processes for changes in grain size of the microstructure. The analytical results confirm the suitability of the current finite element software for forming processes of cellphone covers.

Rigid-Plastic Finite Element Analysis of Cross Wedge Rolling

2010 ◽  
Vol 654-656 ◽  
pp. 1610-1613
Author(s):  
Dyi Cheng Chen ◽  
Ci Syong You ◽  
Gua Nying Lai ◽  
Syue Cheng Ji
Keyword(s):  
Finite Element ◽  
Effective Strain ◽  
Rolling Process ◽  
Simulation Software ◽  
Cross Wedge Rolling ◽  
Rigid Plastic ◽  
Element Analysis ◽  
Finite Element Software ◽  
Plastic Deformation Behavior ◽  
Major Factors

In the cross wedge rolling process, many factors must be controlled to obtain the required plastic strain and desired tolerance values. The major factors include the wedge relative velocity, the forming angle, the spreading angle, and sectional reduction. This paper uses rigid-plastic finite element (FE) DEFORMTM 3D software to investigate the plastic deformation behavior of an aluminum alloy (A7075) workpiece as it is processed for cross wedge rolling. This study analyzes the effective strain, the effective stress, and the X-axial load distribution of the workpiece under various rolling conditions. Furthermore, using simulation software to analyze the changes to the microstructure by the rolling process, this study presents analytical results that confirm the suitability of the current finite element software for cross wedge rolling.

Investigation into Bicycle Front Fork Forming Process of Simulation and Experiment

2014 ◽  
Vol 626 ◽  
pp. 199-204
Author(s):  
Dyi Cheng Chen ◽  
Wen Hsuan Ku
Keyword(s):  
Finite Element ◽  
Effective Strain ◽  
Three Dimensional ◽  
Forming Process ◽  
Rigid Plastic ◽  
Billet Temperature ◽  
Finite Element Software ◽  
Plastic Deformation Behavior ◽  
Graphics Software ◽  
Three Dimensional Finite Element

This study uses the three dimensional finite element code to examine the plastic deformation behavior of bicycle front fork forging. First the paper used Solid works 2010 3D graphics software to design the bicycle front fork die, and that used rigid-plastic model finite element analytical methods, and assuming mode to be rigid body. The front fork material is titanium alloy Ti-6Al-4V. A series of simulation analyses in which the variables depend on die temperature, billet temperature, forging speed, friction factors, die angle are reveal to effective stress, effective strain, die radial load distribution and damage value for bicycle front fork forming. The simulation combined Taguchi method to analysis optimization. The results of the analysis can be used to stabilize finite element software to forming front fork, and also confirm the suitability of bicycle front fork through experiment optimization.

Analysis on Temperature Field of Work-Piece during Cross Wedge Rolling

2011 ◽  
Vol 230-232 ◽  
pp. 352-356
Author(s):  
Wen Ke Liu ◽  
Kang Sheng Zhang ◽  
Zheng Huan Hu
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Metal Flow ◽  
Work Piece ◽  
Contact Deformation ◽  
Cross Wedge Rolling ◽  
Forming Process ◽  
Rigid Plastic ◽  
Finite Element Software ◽  
Deform 3D

Based on the rigid-plastic deformation finite element method and the heat transfer theories, the forming process of cross wedge rolling was simulated with the finite element software DEFORM-3D. The temperature field of the rolled piece during the forming process was analyzed. The results show that the temperature gradient in the outer of the work-piece is sometimes very large and temperature near the contact deformation zone is the lowest while temperature near the center of the rolled-piece keeps relatively stable and even rises slightly. Research results provide a basis for further study on metal flow and accurate shaping of work-piece during cross wedge rolling.

A Finite Element Investigation into the Changing Channel Angular Extrusion of Brass Alloy

2008 ◽  
Vol 594 ◽  
pp. 90-95 ◽  
Author(s):  
Dyi Cheng Chen ◽  
Jia Ci Wang ◽  
Gow Yi Tzou
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Cross Sections ◽  
Deformation Behavior ◽  
Effective Strain ◽  
Extrusion Process ◽  
Brass Alloy ◽  
Rigid Plastic ◽  
Extrusion Processing ◽  
Plastic Deformation Behavior

This study investigates a novel changing channel angular (CCA) extrusion process, in which high strains are induced within the billet by passing it through a series of channels of unequal cross-sections arranged such that they form specified internal angles. Using commercial DEFORMTM 2D rigid-plastic finite element code, the plastic deformation behavior of CuZn37 brass alloy is examined during one-turn and two-turn CCA extrusion processing in dies with internal angles of φ =90o, 120o, 135o or 150o, respectively. The simulations focus specifically on the effects of the processing conditions on the effective strain, the rotation angle and the effective stress induced within the extruded billet. The numerical results provide valuable insights into the shear plastic deformation behavior of CuZn37 brass alloy during the CCA extrusion process.

Taguchi Method and Genetic Algorithm Neural Networks Analysis of Forging Process of Bicycle Chain Wheel

2013 ◽  
Vol 284-287 ◽  
pp. 220-224
Author(s):  
Dyi Cheng Chen ◽  
Ci Syong You
Keyword(s):  
Genetic Algorithm ◽  
Neural Networks ◽  
Finite Element ◽  
Taguchi Method ◽  
Rigid Plastic ◽  
Plastic Deformation Behavior ◽  
Shear Friction Factor ◽  
Optimization Parameters ◽  
Networks Analysis ◽  
3D Software

Recent years due to the rise of awareness of environmental protection and energy conservation are attention. Which is the most representative of the bike. Many processing factors must be controlled in the bicycle chain wheel. This study employed the rigid-plastic finite element (FE) DEFORMTM 3D software to investigate the plastic deformation behavior of an aluminum alloy workpiece as it is forged for bicycle chain wheels. Factors include the temperature of the forging billet, shear friction factor, temperature of die and punch speed control all parameters. Moreover, this study used the Taguchi method and Genetic algorithm neural networks to determine the most favorable optimization parameters. Finally, our results confirmed the suitability of the proposed design, which enabled a bicycle chain wheel die to achieve perfect forging during finite element testing.

Numerical Simulation of Material Plastic Deformation Using the Drawing Forming Process of Contoured Internal Surface Tubes

2020 ◽  
Vol 841 ◽  
pp. 54-58
Author(s):  
Martin Necpal ◽  
Erika Hodúlová ◽  
Maroš Martinkovič
Keyword(s):  
Numerical Simulation ◽  
Three Dimensional ◽  
Internal Surface ◽  
Modern Technology ◽  
Process Conditions ◽  
Forming Process ◽  
Rigid Plastic ◽  
Seamless Steel Tubes ◽  
3D Software ◽  
Corner Filling

Production of multi-rifled seamless steel tubes employing cold draw process using multi-rifled mandrel is quite a modern technology. The important characteristic of the tube drawing process, unlike the tube with internal rifling, is the corner filling which influences the dimension accuracy of the internal shape of the tube. In this study, the influence of drawing tool dimensions and mandrel shape on to final rifling filling was investigated. Draw process has been simulated by using the three-dimensional rigid-plastic finite element method (FEM) by using DEFORM 3D software. The results of numerical simulation show that the shape of drawing tools and process conditions have a significant influence on the forming process and final shape and properties of the workpiece.

Sheet Metal Cover Drawing Forming Process Analysis

2014 ◽  
Vol 971-973 ◽  
pp. 191-195
Author(s):  
Ya Ping Fan
Keyword(s):  
Finite Element ◽  
Sheet Metal ◽  
Process Analysis ◽  
Rapid Development ◽  
Simulation Software ◽  
Von Mises Stress ◽  
Skilled Workers ◽  
Forming Process ◽  
Finite Element Software ◽  
Stamping Process

With the rapid development of finite element technique and computer technology, the design of the cold punching mould CAD / CAM with CAE analysis is changing the way that traditional craft manufacture mold, especially the development and application of stamping simulation software, make the stamping die design and processing and quantitative, can advance analysis of stamping process program, finally got the ideal pressing parameter, realize the automation of design, save resources and reduce the dependence on experience and reduce the demand for skilled workers. Based on nonlinear dynamic finite element software ANSYS / ls-dyna continuous function, simulation of sheet metal forming process and unloading plate deformation, forming process, at any time throughout the von mises stress nephogram should rebound results and strain value and unloading plate materials, help us better analysis to understand the changes of the internal material sheet metal stamping process.

Study of Forging Forming of 7075 Aluminum Alloy Bicycle Pedal

2012 ◽  
Vol 579 ◽  
pp. 101-108 ◽  
Author(s):  
Dyi Cheng Chen ◽  
Fung Ling Nian ◽  
Jiun Ru Shiu ◽  
Wen Hsuan Ku
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Aluminum Alloy ◽  
Effective Strain ◽  
High Strength ◽  
Mold Temperature ◽  
Grain Structure ◽  
7075 Aluminum Alloy ◽  
Rigid Plastic ◽  
Plastic Deformation Behavior

Forging is simple and inexpensive in mass production. Metallic materials are processed through plastic deformation. This not only changes the appearance but also changes the internal organization of materials that improve mechanical properties. However, regarding manufacturing of plastic products, many processing factors must be controlled to obtain the required plastic strain and desired tolerance values. In this paper, we employed rigid-plastic finite element (FE) DEFORMTM software to investigate the plastic deformation behavior of an aluminum alloy (A7075) workpiece as it used to forge bicycle pedals. First we use Solid works 2010 3D graphics software to design the bicycle pedal of the mold and appearance, moreover import finite element (FE) DEFORMTM 3D software for analysis. The paper used rigid-plastic model analytical methods, and assuming mode to be rigid body. A series of simulation analyses in which the variables depend on different temperatures of the forging billet, round radius size of ram, punch speed, and mold temperature were revealed to confirm the predicted aluminum grain structure, effective stress, effective strain, and die radial load distribution for forging a bicycle pedal. The analysis results can provide references for forming bicycle pedal molds. Finally, this study identified the finite element results for high-strength design suitability of a 7075 aluminum alloy bicycle pedal.

Finite Element Analysis of Rim Ring Rolling Forming of Bicycle Aluminum Alloy

2012 ◽  
Vol 445 ◽  
pp. 231-236
Author(s):  
Dyi Cheng Chen ◽  
Bao Yan Lai ◽  
Ci Syong You
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Aluminum Alloy ◽  
Effective Strain ◽  
Rolling Process ◽  
Ring Rolling ◽  
Rigid Plastic ◽  
Element Analysis ◽  
Rolling Velocity ◽  
Plastic Deformation Behavior

The bicycle is not only a pollution-free method of transportation, but also has sport and recreation functions. Therefore, the bicycle attracted attention in now society gradually. This study uses the rigid-plastic finite element (FE) DEFORMTM software to investigate the plastic deformation behavior of a 7075 aluminum alloy workpiece as it is formed through a ring rolling die. This study systematically investigates the relative influences of ring rolling velocity, entering velocity, and workpiece temperature under various ring rolling forming conditions. The effective strain, effective stress, and workpiece damage distribution in the ring rolling process are also investigated. Results confirm the suitability of the proposed design process, which allows a ring rolling manufacturer to achieve a perfect design during finite element analysis.

Three-Dimensional Finite Element Modeling of Drilling Processes

2006 ◽  
Author(s):  
T. D. Marusich ◽  
S. Usui ◽  
R. Aphale ◽  
N. Saini ◽  
R. Li ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Three Dimensional ◽  
Constitutive Models ◽  
Simulation Software ◽  
Process Conditions ◽  
Third Wave ◽  
Element Modeling ◽  
Drill Point ◽  
Three Dimensional Finite Element

The three dimensional (3D) finite element modeling (FEM) and experimental validation of drilling are presented. The Third Wave AdvantEdge machining simulation software is applied for the FEM. It includes fully adaptive unstructured mesh generation, thermo-mechanically coupling, deformable tool-chip-workpiece contact, interfacial heat transfer across the tool-chip boundary, and constitutive models appropriate for process conditions and finite deformation analyses. The workpiece is modeled with a predrilled cone-shape blind hole to enable the early full-engagement of the whole drill point region to reduce the simulation time. Drilling experiments are conducted on the Ti-6Al-4V using a twist drill geometry. The calculated cutting force and torque are compared with the results of experiments with good agreement. Effects of process parameters on the stress and temperature distributions of the drill and workpiece are investigated in detail using the FEM.

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