We are manufacturers drawn bars.
Currently we draw: Round , Hex and Square shapes. I needed some
information about drawing other shapes/profiles that are specific to
Apart from making the die, are there any special procedures that may be
Profile/Shape rolling? Aneeling?
If anyone has any information, I would really appreciate it if you
could share it with me.
The input shape (cross section) must be as close as possible to the
finished shape's cross section. For example drawing a "half circle"
profile is best done with oversized round milled one one side or as a
as-rolled to oversized "half circle" stock. Theorectically, you can
drawn a "half moon" cross section from an oversize round (full circle
cross section) using several dies morphing into a half moon cross
section - with intermediate stress relieving (or re-crystallization
anneal) between the draws.
A cold finishing mill in Indiana once had a small re-roll hot mill
on-site to make special
as-rolled shapes from purchased hot roll (straight) rods of basic
round, square, hexagon, or flats.
Cold finishing difficult shapes by drawing requires heavy drafts (or
draughts as the British say) with intermediate thermal treatments keep
to a minimum due to cost. Some cross sections as "I" beams are never
cold drawn because straightening after drawing is problematic and
requires some acceptance in loss of some desired quality due to