Predictions of Forming Limits in Cold Open-Die Extrusion Process using FEM

2020 ◽  
Vol 44 (6) ◽  
pp. 435-441 ◽  
Author(s):  
Yuangen Qiu ◽  
Seung Chul Park ◽  
Hae Young Cho
Keyword(s):  
Extrusion Process ◽  
Forming Limits ◽  
Die Extrusion

Modeling of Aluminum Extrusion Process Using Non-Orthogonal Block Structured Grids Based FVM

2011 ◽  
Vol 189-193 ◽  
pp. 1749-1752
Author(s):  
Rui Wang ◽  
Hong Zhong Li
Keyword(s):  
Mathematic Model ◽  
Extrusion Process ◽  
Special Treatment ◽  
Aluminum Extrusion ◽  
Rigid Plastic ◽  
Structured Grids ◽  
Simulation Results ◽  
Flow Theories ◽  
Volume Method ◽  
Die Extrusion

The mathematic model of 3D aluminum extrusion processes using finite volume method (FVM) was established in this paper. The basic theories and rigid-plastic flow theories of this model were researched and built. Non-orthogonal structured grids were used to match complex geometric boundaries and local refinement of grids was also realized. The collocated arrangement is used to discretize the governing equations on non-orthogonal grids directly, pressure oscillations bring by this arrangement and error caused by grid’s non-orthogonality is eliminated by special treatment. A pocket die extrusion process was simulated using the program developed in this paper. The simulation results were also compared with that simulated by FEM software Deform in the same process, material and die conditions. The feasibility and efficiency of the mathematic model built in this paper was demonstrated by the simulation results and the comparison.

Effects of Multi-Step Welding Chamber on Extrusion Product Quality and Die Strength

2010 ◽  
Vol 44-47 ◽  
pp. 311-315
Author(s):  
Hao Chen ◽  
Guo Qun Zhao ◽  
Cun Sheng Zhang ◽  
Dao Sheng Wen
Keyword(s):  
Product Quality ◽  
Maximum Stress ◽  
Metal Flow ◽  
Extrusion Process ◽  
Porthole Die ◽  
Die Life ◽  
Die Extrusion ◽  
Extrusion Product ◽  
Porthole Die Extrusion ◽  
Key Parameter

The shape of welding chamber is a key parameter in flat porthole die extrusion process, which influences product quality and die life-span directly. In this paper, by means of numerical simulation of the extrusion process for an aluminum hollow profile, the effects of multi-step welding chamber on metal flow and die strength have been investigate. The numerical results revealed that the multi-step welding chamber was effective to balance metal flow in the die cavity. In addition, with an increasing step of welding chamber, the maximum stress and deflection of the lower die decreased, while the deflection of the mandrel kept almost unchanged and the maximum stress of upper die increased.

A Research on the Measurement of Friction Coefficient of Plastic Forming by Floating Die Extrusion

2011 ◽  
Vol 328-330 ◽  
pp. 530-537
Author(s):  
Xuan Rong Xin ◽  
Cheng Song He ◽  
Long Long Shan
Keyword(s):  
Friction Coefficient ◽  
Extrusion Process ◽  
New Method ◽  
Experimental Device ◽  
Plastic Forming ◽  
Die Extrusion ◽  
Extrusion Technology

A new measurement of friction coefficient which is more applicable to overload extrusion technology is proposed in this paper. It determines the friction coefficient of overload plastic forming by firstly determining the load mutation of friction by a floating die experimental device. It is proved in this experiment that the friction coefficient in extrusion process can be precisely determined and the effectiveness of lubricating can be evaluated objectively by this new method which is easier to understand and master than the theory that determines the friction coefficient by ring upsetting.

Study on solid bonding behavior of AZ31 Mg alloy during porthole die extrusion process

2017 ◽  
Vol 93 (5-8) ◽  
pp. 2791-2799 ◽  
Author(s):  
Jixiao Zhang ◽  
Liang Chen ◽  
Guoqun Zhao ◽  
Cunsheng Zhang ◽  
Jixue Zhou
Keyword(s):  
Extrusion Process ◽  
Mg Alloy ◽  
Porthole Die ◽  
Az31 Mg Alloy ◽  
Die Extrusion ◽  
Porthole Die Extrusion

Numerical Simulation Analysis on Porthole Dies Extrusion of Aluminum Mini-Thin Harmonica-Shaped Tube

2013 ◽  
Vol 457-458 ◽  
pp. 156-159
Author(s):  
Fu Li Lu ◽  
Ji Shun Song ◽  
Jian Zhang
Keyword(s):  
Simulation Analysis ◽  
Cooling System ◽  
Metal Flow ◽  
Extrusion Process ◽  
Porthole Die ◽  
Shaped Tube ◽  
Mean Pressure ◽  
The Mean ◽  
Die Extrusion ◽  
Porthole Die Extrusion

This paper describes a 3D-deform simulation of porthole die extrusion process for producing harmonica-shaped tubes used for a cooling system of automobiles. Designing the related structure of the porthole die and observing the simulation results, the study was designed to evaluate the welding effect when the length of bearing exit take different values.The mean pressure and exit velocity at the welding plane are analyzed at the same time. The welding effect is determined by the mean pressure at the welding plane .The behavior of metal flow in the container is analyzed in this paper. Through the above analysis, the best structure and size can be obtained in the process of deformation so as to obtain the better machanical properties.

Portholes Die Extrusion Process Numerical Simulation and Optimal Die Design

2014 ◽  
Vol 1065-1069 ◽  
pp. 1821-1824
Author(s):  
Yun Ji Zhang ◽  
Yong Su ◽  
Ran Wei ◽  
San Zhou Yi ◽  
Bin Wan
Keyword(s):  
Temperature Field ◽  
Flow Velocity ◽  
Strain Field ◽  
Metal Flow ◽  
Extrusion Process ◽  
Deformation Energy ◽  
Die Design ◽  
Before And After ◽  
Die Extrusion ◽  
Deform 3D

In the paper, extrusion process of hollow aluminum profile was simulated using DEFORM-3D; the metal flow velocity of setting baffle-blocks before and after is compared. Three kinds of welding chamber depth of 10 mm, 13 mm, 15 mm were used respectively for extrusion process simulation and got die load varying pattern. Also the strain field and temperature field were analyzed. The results show that the metal flow velocity was more well-distributed by setting A、B、C、D baffle-blocks. When the weld chamber depth is 13 mm, the die load is the smallest. By analyzing the strain field and temperature field,The results showed that the major cause of metal temperature rising in the extrusion process is deformation energy generating in the process of metal plastic deformation.

Sign in / Sign up

Export Citation Format

Share Document