Numerical simulation and die structure optimization of an aluminum rectangular hollow pipe extrusion process

2006 ◽  
Vol 435-436 ◽  
pp. 266-274 ◽  
Author(s):  
Wu Xianghong ◽  
Zhao Guoqun ◽  
Luan Yiguo ◽  
Ma Xinwu
Keyword(s):  
Numerical Simulation ◽  
Structure Optimization ◽  
Extrusion Process ◽  
Die Structure ◽  
Pipe Extrusion

Numerical Simulation and Die Design for Vibration Extrusion of Spur Gear

2012 ◽  
Vol 580 ◽  
pp. 37-41
Author(s):  
Qiong Lin ◽  
Bin Meng ◽  
Qing Hua Yang
Keyword(s):  
Numerical Simulation ◽  
Flow Characteristic ◽  
Metal Flow ◽  
Spur Gear ◽  
Extrusion Process ◽  
Die Design ◽  
Forming Process ◽  
Extrusion Die ◽  
Die Structure ◽  
Metal Extrusion

The numerical simulation for spur gear vibration extrusion is performed in this paper. The metal flow characteristic and load-stroke relationship during forming process is analyzed and then compared with traditional metal extrusion process. The results revealed the axial vibration of cavity die can both reduce forming load and benefit for metal flow, which could achieve better forming quality. Finally according to the processing requirements, the vibration generator and whole extrusion die structure is designed.

Basic Experimental and Numerical Investigations on Chip Pressing

2013 ◽  
Vol 554-557 ◽  
pp. 630-637 ◽  
Author(s):  
Martin Grüner ◽  
Marion Merklein
Keyword(s):  
Numerical Simulation ◽  
Aluminium Alloys ◽  
Testing Machine ◽  
Material Model ◽  
Extrusion Process ◽  
Milling Process ◽  
Numerical Investigations ◽  
Compression Direction ◽  
Universal Testing ◽  
The Stability

Aluminium alloys show a great potential for lightweight constructions due to their high strength and low density but the production of this material is very energy consuming. Also the recycling of aluminium alloys, e.g. chips from the milling process, shows different challenges. Beside contamination by cooling lubricant and oxidation of the surface of the chips the melting and rolling process for new semi finish products needs a high amount of energy. TEKKAYA shows a new approach for recycling of aluminium alloy chips by an extrusion process at elevated temperatures producing different kinds of profiles. A new idea is the production of components directly out of chips using severe plastic deformation for joining of the chips similar to the accumulative roll bonding process in sheet metal forming. In a first approach aluminium alloy chips out of a milling process were uniaxial compressed with different loads inside an axisymmetric tool installed in a universal testing machine. The compressed chip disks subsequently were tested with two experiments to gain information on their stability. First experiment is a disk compression test with the disk standing on its cylindrical surface, giving information on the stability perpendicular to the compression direction. Second experiment is a stacked disk compression test with three disks to investigate the stability parallel to compression direction. During all three tests force and displacement values are recorded by the universal testing machine. These data are also processed to calculate or identify input parameters for the numerical investigations. For numerical simulation ABAQUS in conjunction with the Drucker-Prager-Cap material model, which is often used for sintering processes, seems to be a good choice. By numerical simulation of the experiments and comparison with the experiments input parameters for the material model can be identified showing good accordance. This material model will be used in future numerical investigations of an extrusion process to identify tool geometries leading to high strains inside the material and by this to an increased stability of the parts.

Numerical simulation of friction extrusion process

2018 ◽  
Vol 253 ◽  
pp. 17-26 ◽  
Author(s):  
H. Zhang ◽  
X. Li ◽  
X. Deng ◽  
A.P. Reynolds ◽  
M.A. Sutton
Keyword(s):  
Numerical Simulation ◽  
Extrusion Process ◽  
Friction Extrusion

scholarly journals Numerical Simulation and Process Optimization of Internal Thread Cold Extrusion Process

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 3960
Author(s):  
Hong-Ling Hou ◽  
Guang-Peng Zhang ◽  
Chen Xin ◽  
Yong-Qiang Zhao
Keyword(s):  
Numerical Simulation ◽  
Process Parameters ◽  
Orthogonal Experiment ◽  
Extrusion Process ◽  
Extrusion Temperature ◽  
Maximum Temperature ◽  
Cold Extrusion ◽  
Internal Thread ◽  
Bottom Hole ◽  
Extrusion Forming

In the internal thread extrusion forming, if the process parameters are not selected properly, the extrusion torque will increase, the extrusion temperature will be too high, or even the tap will break. In order to obtain effective process parameters under certain working conditions, this paper uses a combination of numerical simulation and process experiment to analyze the influence of the bottom hole diameter, extrusion speed, and friction factor on the extrusion torque and extrusion temperature. Through an orthogonal experiment, the significant influence law of different process parameters on the extrusion torque and extrusion temperature was studied, and the order of their influence was determined. Based on the optimal process parameters, numerical simulations and process tests were carried out, and the extrusion effect and related parameters were compared and analyzed. The results show that the extruded thread has clear contour, uniform tooth pitch, complete tooth shape, and good flatness. Compared with before optimization, the maximum extrusion torque has been reduced by 37.15%, the maximum temperature has been reduced by 29.72%, and the extrusion quality has been improved. It shows that the optimized method and optimized process parameters have good engineering practicability.

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