Analysis on the opening of pass in rotary tube expanding mills and the cone angle in the smoothing zone of plugs

doi: 10.13374/j.issn1001-053x.2010.01.001

• YU Hao¹ , 
• Lü Qing-gong² , 
• HUANG Qiu-qun¹ , 
• LI Qun³ , 
• SHI Jian-wei¹ , 
• LI Dong³

• 1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;

• 2. Beijing Branch Large and Medium-sized Metallurgical Technology Development Co. Ltd., Beijing 100029, China;

• 3. Tianjin Pipe Group Co. Ltd., Tianjin 300301, China