Investigation of Plug Rolling with Stub Mandrel Using the Finite Element Method

• Published in: Archives of metallurgy and materials Vol. 63; no. 3; pp. 1083 - 1086
• Main Authors: Pavlov, D, Bogatov, A, Pavlova, E, Dyja, H
• Format: Journal Article
• Language: English
• Published: Warsaw Polish Academy of Sciences 01-01-2018
• Subjects: Defects; Deformation; Finite element analysis; Finite element method; finite element simulation fem; forming; guide mark defect; Metal forming; Plug rolling; plug rolling mill; plugging with stub mandrel; Plugs; Rolling mills; Software; Tubes; Wall thickness
• ISSN: 1733-3490; 2300-1909
• DOI: 10.24425/123779

The study proposed the model of “guide mark” defects formation on the internal surface of pipes, produced on PRM mills of PRP – 140. The research of pipe forming at plug rolling mill with stub mandrel has been carried out; regularities of the dimensionless parameters characterizing the deformation of the gap release, depending on the reduction ratio, were determined. The model of “guide mark” defect formation on the internal surface of the pipe has been proposed. This allows for lesser wall thickness variation of rough tubes. It has been shown that, when using dioctahedral pass designs in comparison with hexagonal pass designs the proportion of displaced volume along the pipe axis is greater but the value is lower; thereby, the risk of “guide mark” defect forming is reduced.