An investigation on twist extrusion followed by forward extrusion in production of aluminum–copper bimetallic bar

2021 ◽  
Vol 33 ◽  
pp. 52-62
Author(s):  
H. Bohluli ◽  
K. Khalili ◽  
S.M.H. Seyedkashi
Keyword(s):  
Forward Extrusion ◽  
Twist Extrusion

Test of Friction Parameters in Bulk Metal Forming Based on Forward Extrusion Processes

2020 ◽  
Vol 25 (3) ◽  
pp. 333-339
Author(s):  
Xia Chen ◽  
Tong Wen ◽  
Kefan Liu ◽  
Yifei Hong
Keyword(s):  
Metal Forming ◽  
Bulk Metal ◽  
Bulk Metal Forming ◽  
Forward Extrusion ◽  
Friction Parameters

A study of the axi-symmetric forward extrusion of porous metal through a square die

1987 ◽  
Vol 15 (2) ◽  
pp. 119-130 ◽  
Author(s):  
Hung-Kuk Oh ◽  
Joung-Woo Phark
Keyword(s):  
Porous Metal ◽  
Forward Extrusion

Experimental Study of a Full Forward Extrusion Process from Metal Strip

2012 ◽  
Vol 504-506 ◽  
pp. 587-592 ◽  
Author(s):  
Marion Merklein ◽  
Tommaso Stellin ◽  
Ulf Engel
Keyword(s):  
Extrusion Process ◽  
Metal Strip ◽  
Raw Material ◽  
High Rate ◽  
Process Chain ◽  
Forward Extrusion ◽  
Bulk Forming ◽  
Material Conditions ◽  
Set Up ◽  
Tooling System

A high rate of production of complex microparts is increasingly required by fields like electronics and micromechanics. Handling is one of the main problems, limiting those forming processes of small metal components consisting of multiple forming stages. A forming chain in which a metal strip acts both as raw material and support of the workpiece through the different stages of the process, is seen as a solution that radically simplifies the positioning of microparts. Each workpiece stays connected to the strip through all the forming steps, being separated just at the end of the process chain. In this work, a tooling system for the bulk forming from copper strips has been set up and employed in a full forward extrusion process of a micro-billet. The same die, with a diameter of 1 mm, has been used with three different strip thicknesses (1, 2 and 3 mm) and three different material conditions. The use of thinner and hard-as-rolled strips has resulted in achieving a higher ratio of the billet length to strip thickness.

scholarly journals Experimental Investigation of the Equal Channel Forward Extrusion Process

Metals ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. 471-483 ◽  
Author(s):  
Mahmoud Ebrahimi ◽  
Faramarz Djavanroodi ◽  
Sobhan Tiji ◽  
Hamed Gholipour ◽  
Ceren Gode
Keyword(s):  
Experimental Investigation ◽  
Extrusion Process ◽  
Forward Extrusion

scholarly journals Evaluation of RBD palm stearin as alternative lubricant for cold forward extrusion process

2017 ◽  
Vol 908 ◽  
pp. 012062
Author(s):  
A N Farhanah ◽  
S Syahrullail ◽  
M A Ajruddin
Keyword(s):  
Palm Stearin ◽  
Extrusion Process ◽  
Forward Extrusion

scholarly journals Finite Element Analysis of Copper Deformed By Conventional Forward Extrusion

2014 ◽  
Vol 10 (6) ◽  
pp. 01-05 ◽  
Author(s):  
Morteza Soltantabar ◽  
◽  
Dr. A. Krishnaiah ◽  
Ali Tari
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Forward Extrusion

Analysis of Combined Backward-Forward Extrusion

1976 ◽  
Vol 98 (2) ◽  
pp. 438-445 ◽  
Author(s):  
B. Avitzur ◽  
W. C. Hahn ◽  
M. Mori
Keyword(s):  
Upper Bound ◽  
Process Parameter ◽  
Total Power ◽  
Deformation Region ◽  
Forward Flow ◽  
Forward Extrusion ◽  
Combined Flow ◽  
Dependent Parameter ◽  
Independent Process

The upper bound approach is used to analyze combined backward-forward extrusion. The deformation region is divided into five zones separated by planer and cylindrical surfaces of velocity discontinuities. The internal power of deformation and shear and friction losses are computed individually and summed. The pseudo-independent process parameter is the backward rate of flow with respect to which the total power of deformation is optimized. The optimal backward rate of flow is assumed to be the actual one. Thus, the backward rate of flow becomes a dependent parameter to be studied through this analysis. Conditions covering backward rates of flow from zero to maximum are demonstrated graphically. Examples are given for which combined flow results and for which either only forward flow or only backward flow occur.

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