Effect of the Friction Factor on Forming of Tubular Billets when Combined Swaging and Expanding Operations
| Authors: Solaiman A.A., Shubin I.N. | Published: 19.09.2013 |
| Published in issue: #6(639)/2013 | |
| Category: Technology and Process Machines | |
| Keywords: swaging, expanding, combined operation, tubular billet, friction factor, forming, deformation, simulation, QFORM |
The modeling of combined swaging and expanding operations by the program QFORM is done. Tubular billet deformations (thickness, meridional, tangential and height variations) performed by swaging and expanding operations in one die were experimentally investigated. There were set specific deformation values by varying the friction factor on the die and punch. It is proved that with combined swaging and expanding operations of tubular billets it is possible to get a pipe adapter with a high coefficient of forming. Increase of friction factor in the field of expanding leads to the increase of meridional compressive stress and to thinning of the tubular billet walls.
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