3 Fundamentals of press design

Bending
The roll stand for profile roll changeover is used for the manufacture of
compact sections with fixed dimensions. However, if spacers are manually
inserted into each stand, it is also possible to manufacture sections
with different widths (Fig. 4.8.22). Both stand types – rigid and with
telescopic roll set – permit the rolling dies to be exchanged by detaching
the front stand upright. However, this involves long set-up times.
Drive shaft changeover offers a compromise between exchanging individual
rollers and exchange of a complete stand. At a special work station
equipped with a suitable crane harness, the upper and lower drive
shafts are exchanged together (Fig. 4.8.23). This helps to avoid set-up
errors and saves the need for a second stand set. The time required for
this changeover process lies somewhere between that required for
exchanging rollers and that required when using pallets for the stands.
Metal Forming Handbook / Schuler (c) Springer-Verlag Berlin Heidelberg 1998
Fig. 4.8.20
Roll stands
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