Comparisons of aluminum extrusion process with fake porthole die structure and ordinary die structure

2015 ◽  
pp. 95-98
Author(s):  
X Sun
Keyword(s):  
Extrusion Process ◽  
Aluminum Extrusion ◽  
Porthole Die ◽  
Die Structure

Solid Welding Conditions for Seam and Hollow Extrusion Process of 7075 Aluminum Alloy

2011 ◽  
Vol 479 ◽  
pp. 62-73 ◽  
Author(s):  
Quang Cherng Hsu ◽  
Kun Hong Kuo ◽  
Chi Peng Hsu
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Cross Sections ◽  
High Strength ◽  
Extrusion Process ◽  
Protective Atmosphere ◽  
Porthole Die ◽  
Die Structure ◽  
Welding Strength ◽  
Good Agreement

Direct extrusion by porthole – bridge die configuration has been successfully used to fabricate products with hollow cross sections for 6000 series aluminum alloys. However, if for 7000 series aluminum alloys, this situation alerts since different alloy composition such as Cu causing hollow extrusion failed due to not enough welding strength in seam. In order to determine the solid welding conditions during hollow extrusion with porthole die structure for high strength aluminum alloy, an easy tooling configuration has been designed. The proposed method is easy and cheap because there is no necessary to conduct experiment in controlled environment such as in vacuum chamber of Gleeble test or in a protective atmosphere. A seam and hollow extrusion for square tube has been conducted to obtain the welding strength comparison to the proposed solid welding method which shows good agreement.

FEM simulation of aluminum extrusion process in porthole die with pockets

2010 ◽  
Vol 20 (6) ◽  
pp. 1067-1071 ◽  
Author(s):  
You-feng HE ◽  
Shui-sheng XIE ◽  
Lei CHENG ◽  
Guo-jie HUANG ◽  
Yao FU
Keyword(s):  
Fem Simulation ◽  
Extrusion Process ◽  
Aluminum Extrusion ◽  
Porthole Die

scholarly journals Simulation Analysis of Porthole Die Extrusion Process and Die Structure Modifications for an Aluminum Profile with High Length–Width Ratio and Small Cavity

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1517 ◽  
Author(s):  
Zhiwen Liu ◽  
Luoxing Li ◽  
Shikang Li ◽  
Jie Yi ◽  
Guan Wang
Keyword(s):  
Metal Flow ◽  
Extrusion Process ◽  
Width Ratio ◽  
Small Cavity ◽  
Porthole Die ◽  
Aluminum Profile ◽  
Die Structure ◽  
Length Width ◽  
Die Extrusion ◽  
High Length

The design of a porthole die is one of the key technologies for producing aluminum profiles. For an aluminum profile with high length–width ratio and small cavity, it is difficult to control the metal flow through porthole die with the same velocity to ensure the die’s strength. In the present study, the porthole die extrusion process of aluminum profile with small cavity was simulated using HyperXtrude 13.0 software based on ALE formulation. The simulation results show for the traditional design scheme, the metal flow velocity in porthole die at every stage was severely not uniform. The standard deviation of the velocity (SDV) at the die exit was 19.63 mm/s. The maximum displacement in the small mandrel was 0.0925 mm. Then, aiming at achieving a uniform flow velocity and enough die strength, three kinds of die structure modifications for the porthole die were proposed. After optimization, desired optimization results with SDV of 0.448 mm/s at the die exit and small mandrel deflection were obtained. Moreover, the temperature uniformity on the cross-section of die exit, welding pressure, and die strength were improved greatly. Finally, the optimal porthole die was verified by the real extrusion experiment. A design method for porthole die for aluminum with a high length–width ratio and small cavity was proposed, including sunken port bridges to rearrange the welding chamber in upper die, increasing the entrance angle of portholes, introducing the baffle plate, and adjusting the bearing length.

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.

Study of Flow Balance and Temperature Evolution over Multiple Aluminum Extrusion Press Cycles with HyperXtrude 9.0

2009 ◽  
Vol 424 ◽  
pp. 257-264 ◽  
Author(s):  
Amin Farjad Bastani ◽  
Trond Aukrust ◽  
Inge Skauvik
Keyword(s):  
Finite Element ◽  
Finite Elements ◽  
Extrusion Process ◽  
Aluminum Extrusion ◽  
Billet Temperature ◽  
Exit Velocity ◽  
Extrusion Press ◽  
Flow Balance ◽  
Exit Temperature ◽  
Ram Speed

In this research, transient finite element simulations of the aluminum extrusion process have been performed in order to study how process parameters influence flow balance and exit temperature. This has been achieved by investigating the influence of billet taper, front billet temperature and ram speed on the run-out velocity and temperature of two separate outlets. Analysis of variance (ANOVA) has been employed to study the effect of each parameter on the velocity and temperature variation of the extruded section. Results show that increasing each of these three parameters results in an undesired increase in exit velocity and temperature. The front billet temperature is found to be the most significant factor affecting the variation. The finite elements software used was Altair HyperXtrude 9.0.

Sign in / Sign up

Export Citation Format

Share Document