Division of Materials Forming, Department of Production Engineering,
Royal Institute of Technology, S-100 44 Stockholm, Sweden
FREE ABSTRACT (to read the full article, please log in below).
A full-scale industrial process for
the manufacturing of large copper canisters to be used for encapsulation
of nuclear waste has been studied. The process involves production of seamless
copper tubes by hot extrusion. The entire process has been simulated with
the help of a commercial FE-code Qform. Strain and temperature distributions
within the workpiece at different stages of the forming process have been
analyzed and the results are presented as functions of the workpiece radius.
Load requirements have been determined and presented as functions of the
tool displacement. Modifications of the current process with respect to
the design of the piercing punch and extrusion semi-die angle have been
carried out and the results are compared with the current process. Strain
and temperature levels in the final product have been related to the grain
size obtained in the earlier work. It is concluded that the levels obtained
lie within the interval that ensures a fine grain microstructure in the
please log in:
you can do so for free:
© Copyright 2002 Professor F.R. Hall - University of Wolverhampton.