Influence of tool roughness and lubrication on contact conditions in skin-pass rolling

An experimental investigation on the influence of lubrication on roughness transfer in skin-pass rolling of steel strip

“…This implies that the nominal friction coefficient was larger than 0.3. The results mentioned above are considered to be reasonable, considering the so-called ploughing term (Bowden et al, 1943), in which peaks on the roll roughness profile penetrate into the workpiece surface, and are qualitatively similar to the results observed in plane strain upsetting under small reduction (Kijima and Bay 2009). In any case, a certain value of rolling force was needed as a socalled dead region in order to obtain the actual elongation due to the elasticity of the material and work roll.…”

“…These differences might lead to the different results observed in a labora- tory skin-pass rolling experiment (Nagase et al, 2009). Considering the importance of contact length, it is reasonable that plane strain upsetting with small reduction (Kijima and Bay, 2009), at least qualitatively, showed the similarity of the effects of lubrication and tool roughness.…”

“…The calculated rolling force showed good agreement with the measured data under a specific condition and a proper friction coefficient value of 0.1. Kijima and Bay (2009) investigated the effect of lubrication and tool roughness in an experiment and FE analysis involving plane strain upsetting under small reduction to simulate the skinpass rolling condition in terms of the ratio between contact length and reduction. The obtained effect of lubrication and roughness was quantified by the measured length of the sliding region, and it http://dx.doi.org/10.1016/j.jmatprotec.2015.05.023 0924-0136/© 2015 Elsevier B.V. All rights reserved.…”

Temper Haddelemede Pürüzlülük Transferini Etkileyen Parametrelerin İncelenmesine Yönelik Bir Derleme Çalışması

“…Sürtünme koşullarının pürüzlülük transferini etkilediğini tespit etmek için yapılan bir çalışmada ise sürtünme koşullarının pürüzlülük transferini etkilediği belirlenmiştir. Plastik deformasyon ile kayan bölgede ve silindirik iş parçası deformasyonu ile yerel pürüzlülük deformasyonu arasındaki etkileşime bağlı olarak kayan ve yapışma bölgesi arasındaki sınırda daha yüksek pürüzlülük transferine neden olduğunu belirtmişlerdir [23,24].…”

“…• Merdane özellikleri (geometrisi, malzemesi, pürüzlülüğü, pürüzlendirilme yöntemi vb.) [6,7,[11][12][19][20][21][22][23][24],…”