Abstract
This research work is devoted to the theoretical study of the pipe calibration on a mandrel. The aim of the study is to improve
the precision of the calibrated pipes. As the paper shows, it is advisable to apply different methods of research depending on the
purpose of the study of metal forming processes: mathematical, computer or physical simulation. Analytical review of existing
mathematical models of the pipes calibration on a mandrel showed that the set of assumptions adopted in the mathematical modeling
does not allow assessing the precision of the pipes during calibration. Therefore, finite-element method simulation package was
used for this research. Research method and pipes precision index were developed on the basis of the computer simulation using
Deform-3D package. The investigations have allowed us to get the dependence of the pipe precision on technological factors and
to identify the root cause of reduced efficiency calibration – extrafocal deformation.
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