Lubrication of tube in cold pilgering |
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| Affiliation: | 1. School of Mechanical and Electronic Engineering, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, China;2. Department of Mechanical & Electronic, Yuncheng University, Yuncheng, Shanxi 044000, China;1. Institute of Metallurgy, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, Germany;2. Institut de Physique et Chimie des Matériaux de Strasbourg – CNRS-UMR – 7504, 23, rue du Loess BP 43, 67034 Strasbourg, France;1. Instytut Obróbki Plastycznej, Al. Jana Paw?a II 14, 61-139 Poznań, Polska;2. Politechnika Cz?stochowska, Wydzia? In?ynierii Produkcji i Technologii Materia?ów, Instytut Przeróbki Plastycznej i In?ynierii Bezpieczeństwa, Al. Armii Krajowej 19, 42-200 Cz?stochowa, Polska;3. National University of Science and Technology “MISIS” (MISIS), Leninskiy pr. 4, 119049 Moscow, Russia;1. Department of Mechanical Engineering/Engineering Research Institute, Gyeongsang National University, 501 Jinju-daero, Jinju 660-701 Korea;2. Department of Industrial and Systems Engineering, Gyeongsang National University, 501 Jinju-daero, Jinju 660-701 Korea;3. Department of Mechanical Engineering, Gyeongsang National University, 501 Jinju-daero, Jinju 660-701 Korea;4. Yonghyun BM Inc., 115 Eosil-ro, Yusan-dong, Yangsan-si, Gyeongnam 626-220 Korea;1. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi''an 710072, PR China;2. School of Metallurgical Engineering, Xi`an University of Architecture and Technology, Xi''an 710055, PR China;3. Xi''an Sheng Dong Forge CO., LTD, Xi''an 710072, PR China;1. Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208 016, India;2. Department of Mechanical Engineering, University of Saskatchewan, Saskatoon S7N 5A9, Canada |
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| Abstract: | A new method of evaluating the lubrication state of a tube in cold pilgering has been studied. A method of calculating the oil film thickness in a bite area on both the outer and inner sides of a tube using the Reynolds equation was proposed. The calculation results revealed that the effects of the tool design, rolling speed, and feed rate on the oil film thickness were significant. Cold pilgering tests were performed on zirconium alloy tubes, including measurement of the oil film thickness using laser equipment and observation of the surface characteristics of tubes. The test results proved the validity of the proposed method. The method is expected to assist the selection of appropriate operation conditions in cold pilgering. |
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| Keywords: | Cold pilgering Lubrication Oil film thickness Reynolds equation Zirconium alloy tube Surface quality |
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