An Analytical Finite Element Technique for Predicting Temperature Distribution in Turning Titanium Alloy

2012 ◽  
Vol 184-185 ◽  
pp. 886-889
Author(s):  
Bin Li ◽  
Hong Wang
Keyword(s):  
Material Flow ◽  
Flow Behavior ◽  
Metal Flow ◽  
Cutting Temperature ◽  
Machining Process ◽  
Engineering Technology ◽  
Metal Machining ◽  
Tc4 Alloy ◽  
Simulation Results ◽  
Element Technique

With the development of engineering technology, FEM can be used to simulate metal machining process and gain better understanding of material flow within dies, so as to optimize tooling to eliminate tears, laps and other forging defects. In this paper, numerical simulation was conducted by using FEM software on the whole cutting process for TC4 alloy mounting parts in an effort to investigate the metal flow behavior. The thermal simulation results obtained were compared with the cutting temperature and discussed in terms of literature data.

Numerical Simulation and Prediction of Cutting Force in Turning of Titanium Alloy

2012 ◽  
Vol 580 ◽  
pp. 63-66 ◽  
Author(s):  
Bin Li ◽  
Hong Wang
Keyword(s):  
Numerical Simulation ◽  
Cutting Force ◽  
Material Flow ◽  
Flow Behavior ◽  
Metal Flow ◽  
Cutting Speed ◽  
Machining Process ◽  
Engineering Technology ◽  
Metal Machining ◽  
Tc4 Alloy

Though titanium alloys are being increasingly sought in a wide variety of engineering and biomedical applications, their manufacturability, especially machining and grinding imposes lot of constraints. With the development of engineering technology, FEM can be used to simulate metal machining process and gain better understanding of material flow within dies, so as to optimize tooling to eliminate tears, laps and other forging defects. In this paper, numerical simulation was conducted by using FEM software on the whole cutting process for TC4 alloy mounting parts in an effort to investigate the metal flow behavior. The calculated cutting force increases approximately logarithmically with the cutting speed, as should be expected from the logarithmic rate dependence.

Numerical Simulation and Thermal Analysis in Milling of Titanium Alloy

2012 ◽  
Vol 503-504 ◽  
pp. 556-559
Author(s):  
Bin Li
Keyword(s):  
Numerical Simulation ◽  
Titanium Alloy ◽  
Flow Behavior ◽  
Metal Flow ◽  
Cutting Temperature ◽  
Cutting Process ◽  
Finishing Process ◽  
Tc4 Alloy ◽  
Simulation Results

Milling of titanium alloy is usually a finishing process, therefore stable cutting process must be guaranteed at first. Temperature distributions were studied in this paper with the help of finite element method (FEM) for its significant influence on the quality of machined part. In this paper, numerical simulation was conducted by using FEM software on the whole cutting process for TC4 alloy mounting parts in an effort to investigate the metal flow behavior. The thermal simulation results obtained were compared with the cutting temperature.

Finite Element Technique for Predicting Stress Distribution in Milling TC4 Titanium Alloy

2014 ◽  
Vol 623 ◽  
pp. 121-124
Author(s):  
Bin Li ◽  
Shu Ling Zhao
Keyword(s):  
Finite Element ◽  
Titanium Alloy ◽  
Material Flow ◽  
Cutting Speed ◽  
Milling Process ◽  
Machining Process ◽  
Engineering Technology ◽  
Tc4 Titanium Alloy ◽  
Metal Machining ◽  
Element Technique

Cutting forces modeling is the basis to understand, simulate milling process and further to control milling process parameters for obtaining higher precision workpieces. With the development of engineering technology, FEM can be used to simulate metal machining process and gain better understanding of material flow within dies, so as to optimize tooling to eliminate tears, laps and other forging defects. In this paper, the calculated cutting force increases approximately logarithmically with the cutting speed, as should be expected from the logarithmic rate dependence.

Finite Volume Simulation in Porthole Dies Extrusion of Aluminum Profiles

2011 ◽  
Vol 291-294 ◽  
pp. 290-296
Author(s):  
Lei Cheng ◽  
Shui Sheng Xie ◽  
You Feng He ◽  
Guo Jie Huang ◽  
Yao Fu
Keyword(s):  
Numerical Simulation ◽  
Finite Volume ◽  
Cross Section ◽  
Process Analysis ◽  
Flow Behavior ◽  
Metal Flow ◽  
Extrusion Process ◽  
Porthole Die ◽  
Simulation Results ◽  
Aluminum Profiles

FEM simulation of aluminum profiles in porthole die extrusion process using Lagrange mesh description will inevitably bring mesh self-contact, severe grid distortion and frequent remeshing, which will result in the loss of computational accuracy and excessive calculation time. In order to solve the above mentioned problems, numerical simulation of aluminum profiles with large and complicated cross-section in extrusion process was achieved using finite volume method based on Euler mesh description. The metal flow behavior and welding course was investigated in detail, which can provide the theoretical guide for porthole die design and optimization. In addition, extrusion experiment was carried out by numerical simulation results. The experimental extrudate was in good agreement with the simulation results, which laid a good solid foundation for non-steady state extrusion process analysis of large scale and complicated cross-section profiles.

Metal Flow Behavior on the Non-Uniform Wall Thickness Three-Way Valve Extrusion

2008 ◽  
Vol 575-578 ◽  
pp. 328-333 ◽  
Author(s):  
Mei Cheng ◽  
Zhi Min Zhang
Keyword(s):  
Flow Behavior ◽  
Metal Flow ◽  
Three Dimensional ◽  
Vertical Direction ◽  
Extrusion Process ◽  
Shell Shape ◽  
Uniform Temperature ◽  
Uniform Wall ◽  
Simulation Results ◽  
Loading Sequence

High pressure valve always takes several dozens to several hundreds MPa pressure and which was difficulty to form because of its complex internal structure. In this paper, three-dimensional numerical simulation was carried out to investigate metal flow behavior during the three-way valve extrusion process. The block shape materials were formed to shell shape three-way components by the level and vertical direction uniform temperature simultaneous extrusion. The simulation results show that the metal flows were influenced by both loading sequence and time of the moving die of two directions. The loading process worked out through dynamic simulation can guide the actual processing.

Modeling of the Temperature Distribution in Machining TC4 Titanium Alloy

2012 ◽  
Vol 182-183 ◽  
pp. 945-949
Author(s):  
Bin Li ◽  
Hong Wang
Keyword(s):  
Numerical Simulation ◽  
Titanium Alloy ◽  
Flow Behavior ◽  
Metal Flow ◽  
Cutting Process ◽  
Trial And Error ◽  
Tc4 Titanium Alloy ◽  
Tc4 Alloy ◽  
Beta Structure ◽  
Alpha Beta

As one of the most commonly used titanium alloys, TC4 (Ti6Al4V) has an alpha–beta structure and is widely used for aircraft components. In this study, numerical simulation was conducted by using FEM software on the whole cutting process for TC4 alloy mounting parts in an effort to investigate the metal flow behavior. This study not only helps to understand but also to improve and optimize cutting process, which are based on experience combined with a trial-and-error approach.

scholarly journals Study on the Relationship between Root Metal Flow Behavior and Root Flaw Formation of a 2024 Aluminum Alloy Joint in Friction Stir Welding by a Multiphysics Field Model

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 913
Author(s):  
Jian Luo ◽  
Jiafa Wang ◽  
Hongxin Lin ◽  
Lei Yuan ◽  
Jianjun Gao ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Material Flow ◽  
Welded Joint ◽  
Yield Criterion ◽  
Flow Behavior ◽  
Metal Flow ◽  
Bottom Surface ◽  
Line Defect ◽  
Friction Stir

In friction stir welding (FSW), many defects (such as kissing bond, incomplete penetration, and weak connection) easily occur at the root of the welded joint. Based on the Levy–Mises yield criterion of the Zener–Hollomon thermoplastic constitutive equation, a 3D thermal–mechanical coupled finite element model was established. The material flow behavior and the stress field at the root area of a 6 mm thick 2024-T3 aluminum alloy FSW joint were studied. The influence of pin length on the root flaw was investigated, and the formation mechanism of the “S line” defects and non-penetration defects were revealed. The research results showed that the “S line” defect forms near the bottom surface of the pin owing to the insufficiently mixed material from the advancing side (AS) and retreating side (RS) near the weld center. The non-penetration defect forms near the bottom surface of the workpiece owing to the insufficient driving force to make the material flow through the weld center. With the continual increase of pin length, the size of the “S line” defect and non-penetration defect reduces, and finally, the defect-free welded joint can be obtained with an optimized suitable length of the pin in this case.

Material Flow Behavior of Refill Friction Stir Spot Welded LY12 Aluminum Alloy

2017 ◽  
Vol 36 (5) ◽  
pp. 495-504 ◽  
Author(s):  
Shude Ji ◽  
Zhengwei Li ◽  
Yue Wang ◽  
Lin Ma ◽  
Liguo Zhang
Keyword(s):  
Rotational Speed ◽  
Material Flow ◽  
Shear Fracture ◽  
Flow Behavior ◽  
Sheet Thickness ◽  
Maximum Velocity ◽  
Outer Wall ◽  
Low Flow ◽  
Friction Stir ◽  
Simulation Results

AbstractA three-dimensional finite volume model was established by ANSYS FLUENT software to simulate material flow behavior of the refill friction stir spot welding (RFSSW) process. The RFSSW experiment was performed to validate the rationality of the simulation results. Simulation results show that the maximum velocity appears at the sleeve outer wall. The velocity becomes smaller as the increase of the distance to the tool walls. The material flow behaviors are verified by the cross section and microstructure of the RFSSW joint. Low flow velocity in the joint center leads to alclad concentration, which easily results in shear fracture. The sleeve plunge depth must be bigger than the upper sheet thickness in order to obtain joint with large bonding area. Both increasing the rotational speed and refilling speed accelerate the material flow while increasing the rotational speed is a more effective method.

Experiment Study of Oil-Air Lubrication on Cooling of Turning Tools

2011 ◽  
Vol 189-193 ◽  
pp. 3187-3190 ◽  
Author(s):  
Jin Li Wang ◽  
Lin Cai ◽  
Hong Tao Zheng
Keyword(s):  
Metal Cutting ◽  
Research Work ◽  
Cutting Temperature ◽  
Cost Savings ◽  
Machining Process ◽  
Dry Cutting ◽  
Air Lubrication ◽  
Temperature Contrast ◽  
Cooling Technology ◽  
Lubrication Conditions

When lubricants are used according to special requirements, it is possible to achieve considerable cost savings. Compared to conventional coolant cooling technology used in metal cutting, oil-air lubrication increases cooling performance, avoids environmental pollution, reduces running and maintenance costs. The cutting temperature contrast experimental research was based on close to practice 45# steel in dry cutting, wet cutting and oil-air lubrication conditions. The research work concentrated on the superiority of oil-air lubrication cooling and the influence of cutting amount on temperature. The experimental results show that oil-air lubrication is more effective in reducing the cutting temperature than wet cutting or dry cutting, this paper details the cutting temperature curves at several different tests provides a basis for industrial production, improves the level of machining process and the significance was being reported.

scholarly journals Metal Machining—Recent Advances, Applications, and Challenges

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 580
Author(s):  
Francisco J. G. Silva
Keyword(s):  
Surface Finish ◽  
Manufacturing Process ◽  
Dimensional Accuracy ◽  
Machining Process ◽  
High Dimensional ◽  
Manufacturing Processes ◽  
Recent Advances ◽  
Metal Machining ◽  
Rapid Manufacture

Though new manufacturing processes that revolutionize the landscape regarding the rapid manufacture of parts have recently emerged, the machining process remains alive and up-to-date in this context, always presenting itself as a manufacturing process with several variants and allowing for high dimensional accuracy and high levels of surface finish [...]

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