Numerical Simulation of Continuous Extrusion Extending Forming under the Large Expansion Ratio for Copper Strip

Abstract

Continuous extrusion under the large expansion ratio is an advanced forming process for manufacturing copper strip, preventing mould structure, die structure, expansion chamber structure and the shape of the billet section is important process paraments of deformation. Based on the characteristic of the forming process, the model of rigid-plastic FEM on DEFORM-3D is established and the numerical simulation of continuous extrusion forming process of the copper strip is carried. The metal flow regularity and the mean-square deviation of velocity with the different process paraments is analyzed. As the result, when using the drum form of preventing mould with promote flow angle and the die with variable calibrating strap, the mean-square deviation of velocity is 0.58. When the second extending angle is 134°, the mean-square deviation of velocity is 0.23. When size of billet is 30 x 1.64 mm2, the mean-square deviation of velocity is only 0.19.

Numerical Investigation into the Influence of Overheating of Aluminum Melt on the Heat Exchange in the Continuous Combined Casting and Pressing

“…So far as the melt passes the crystallization and pressing zones, then quantity in Eq. ( 1) was written in the form (3) where is the internal heat liberation during the phase transition and is the heat liberation from contact friction forces and deformation forces of treated metal [7,9,17].…”

“…Certain disadvantages were revealed during the operation of Conform installations. They violate the production process and are associated with the complexity to fix the pressing tool as well as with the impossibility to reliably control the gap between the ring shoe insert and wheel pass bottom [3,4]. In addition, the operational experience of installations of this design showed that one main cause of their unstable operation during the melt supply is in the appearance of the uncontrolled "freezing-out" on the input part of the pressing tool during the solidification of the liquid phase [5,6].…”

Numerical Analysis of the Non-Stationary Thermal State of the Tool in the Combined Casting and Extrusion of Non-Ferrous Metals 

“…As studies of the methods of continuous extrusion of metals have shown [15][16][17][18][19][20][21][22][23][24], their use significantly increases the efficiency of the production of profiles from non-ferrous metals. One of the promising directions in the development of these technologies is the combination of continuous casting with extrusion on a Conform installation with a horizontal carousel mold [21][22][23][24][25][26].…”

Microstructure Evolution of Copper Strip during Continuous Extrusion and Rolling Forming

“…With the advancements in continuous extrusion of copper bus bar [6][7][8], the copper strip had been manufactured through the continuous extrusion and cold rolling process [9]. Cheng et al [10] analysed the effect of rolling reduction on microstructure and properties of copper strip.…”