Chapter 3 - Rolling of metals

• Roll flattening increases the roll pressure and eventually causes
the rolls to deform more easily than the metal.
•The limiting thickness is nearly proportional to µµµµ, R, σσσσ ’ o but
inversely proportional to E.
For example in steel rolls the limiting thickness is given by
h
min
=
_
µ Rσ
12.
8
Suranaree University of Technology Tapany Udomphol
Jan-Mar 2007
'
o
…Eq.12
In general, problems with limiting gauge can be expected when the
sheet thickness is below 1/400 to 1/600 of the roll diameter.