Finite-element analysis of a vertical twin-roll casting

2014 ◽  
Vol 20 (2) ◽  
pp. 317-322 ◽  
Author(s):  
Jong-Jin Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

Design of Melt-Ejection Nozzle in Horizontal Twin-Roll Casting of Al-1100 by Finite-Element Analysis

2013 ◽  
Vol 746 ◽  
pp. 543-547 ◽  
Author(s):  
Jong Jin Park
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Light Metals ◽  
Melt Flow ◽  
Element Analysis ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Roll Gap ◽  
Twin Roll

Horizontal twin-roll casting is utilized to produce thin strips of light metals, suchas aluminum or magnesium alloys. However, since the melt flow in the roll gap is asymmetric due to the gravity, microstructure distributions become asymmetric resulting in uneven mechanical properties. In the present investigation, the nozzle for ejecting the melt of Al-1100 was designed and improved for the melt flow to be symmetric by finite element analysis.

Finite-Element Analysis of Melt Flow in a Vertical Twin-Roll Casting

2012 ◽  
Vol 217-219 ◽  
pp. 1440-1443
Author(s):  
Jong Jin Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Twin Roll Casting ◽  
Solid Deformation ◽  
Roll Casting ◽  
Metal Sheets ◽  
Complex Phenomena ◽  
Twin Roll ◽  
Economical Process

Twin-roll casting is an efficient and economical process to fabricate metal sheets since it combines solidification and rolling in one process. However, this process requires a careful control because several phenomena, such as heat transfer, solidification, fluid flow and solid deformation, occur simultaneously. In the present study, a rigid-thermo-viscoplastic finite-element analysis was utilized to understand these complex phenomena occurring in a vertical twin-roll casting of an aluminum alloy. As a result several interesting findings were obtained including the development of two symmetrically identical vortexes at the roll entrance.

Design of a Composite Roll with Internal Cooling Channels for Twin-Roll Casting

2013 ◽  
Vol 765 ◽  
pp. 331-335 ◽  
Author(s):  
Jong Jin Park
Keyword(s):  
Finite Element Analysis ◽  
Copper Alloy ◽  
Cooling Water ◽  
Internal Cooling ◽  
Element Analysis ◽  
Twin Roll Casting ◽  
Cooling Channels ◽  
Steel Core ◽  
Roll Casting ◽  
Twin Roll

In twin-roll casting, the melt is cooled, solidified and rolled to a specific thickness only by the rolls and consequently a lot of heat is transferred from the melt to the rolls through the melt/roll interface. In a composite roll, consisting of a steel core and a copper-alloy sleeve, the heat is finally removed by cooling water flowing through internal cooling channels. In the present study, design of the channels was improved using finite-element analysis in the aspects of structural as well as fatigue strengths.

Simulation of Nine-Spacer Nozzle’s Flow Field of Al Roll-Casting Using Coupled Fluid-Thermal Finite Element Analysis

2010 ◽  
Vol 159 ◽  
pp. 697-702
Author(s):  
Ying Zhou ◽  
Ya Xi Tan
Keyword(s):  
Thermal Analysis ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Flow Field ◽  
Three Dimensional ◽  
Fem Simulation ◽  
Cooling Capacity ◽  
Element Analysis ◽  
Roll Casting ◽  
Element Simulation

A three-dimensional coupled fluid-thermal finite element simulation model has been developed to provide analyzing distribution of velocity and temperature of nine-spacer nozzle by using FEM simulation of FLOTRAN module in ANSYS 6.0. To explore fluid-thermal analysis of the flow fields of nine-spacer nozzle of aluminum roll-casting, stricter analysis of postprocessing result was conducted by MATLAB. It was concluded that flow field of nine-spacer nozzle was able to match cooling capacity of cast rollers, but nine-spacer nozzle’s geometric flaw didn’t suit for working in the case of speed increasing of the drawing-sheet and thickness reducing of the aluminium sheet during roll casting.

Finite Element Simulation of Twin-Roll Casting Process with an Implementation of Slip/Friction Boundary Condition

1999 ◽  
Vol 121 (4) ◽  
pp. 665-673 ◽  
Author(s):  
Jee-Gong Chang ◽  
Cheng-I Weng
Keyword(s):  
Finite Element ◽  
Solid Phase ◽  
Casting Process ◽  
Current Approach ◽  
Friction Model ◽  
Thermomechanical Model ◽  
Twin Roll Casting ◽  
Liquid Phases ◽  
Roll Casting ◽  
Twin Roll

The twin-roll casting process is simulated by a general thermomechanical model by using a versatile finite element method. The multidomain method is employed to deal with the solid and liquid phases separately. This includes treating the liquid phase as an Newtonian fluid and the solid phase as a viscoplastic metal. Furthermore, a friction model is proposed to analyze the rolling effect of the completely solidified metal. From the results of this study, the implementation of the friction model can produce a reasonable flow field of the solidified metal. In addition, the non-slip condition severely restricts the motion of the solidified metal and introduces inaccuracy on the temperature, velocity and stress fields as compared to the current approach.

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