Numerical models considering thermal roll and rolling forces.
Below is a MRR and PLR article in category Computers Technology -> subcategory Hardware.
Enhanced Numerical Models for Thermal Roll and Rolling Forces
Summary
This article explores the thermomechanical properties of thermal roll sleeves made from copper alloy, assessed through a uniaxial tensile test under varying temperatures. The innovative analysis techniques presented have significantly enhanced caster roll design.Keywords
Thermal RollArticle Body
The thermal rolls in modern printing media incorporate a core or spindle wrapped with a continuous sheet of print medium, matching the core's width. The paper is wound around the core, achieving a thickness of at least half an inch from the core's edge to the outer paper layer. Each side of this roll features an identifying mark or impression, which may include shallow indentations or adjustments of the paper's edges and fibers. These impressions help in identification without necessarily creating visible marks.Historically, thermal paper rolls faced limitations due to their short lifespan and high costs, making them less appealing. However, advancements in technology have introduced improved chemical films and robust substrata, making thermal rolls a more viable and durable option today.
In the twin-roll-type strip continuous casting process, the calculation of rolling force and roll deformation behavior is crucial for understanding the thermal characteristics of a caster roll. The relationship between flow stress and strain, determined by the strain rate and temperature, plays a key role. Because the mechanical properties of casting materials strongly depend on temperature, the authors used temperature field data for a caster roll to estimate roll deformation accurately.
To extend roll life, numerical models that consider both thermal and rolling forces have been developed. These models utilize thermal elastic-plastic analysis results to predict roll life based on roll revolutions, considering potential fine crack failures on the roll surface. To determine plastic strain distributions, the thermomechanical properties of a copper alloy roll sleeve were examined through uniaxial tensile testing at various temperatures. These advanced analysis techniques have led to significant improvements in caster roll design.
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