Jet EQUIPMENT &TOOLS SBR-30N, Инструкция по эксплуатации и каталог запасных частей

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TIP: If it doesn’t interfere with the proposed final
shape or design, a slight bend made with the
press brake on the leading edge will simplify the
initial rolling process, by allowing the leading
edge to slip more easily over the idle roll.
Beware of the pinch point –
the intersection of the upper and lower rolls.
Failure to comply may cause serious injury
to fingers and/or hands.
1. Make sure rolls and workpiece are clean
and free of debris to prevent pitting the
sheet metal.
2. Back off the idle roll completely by rotating
the idle roll screws (L, Figure 12) counter-
clockwise.
3. Loosen the bolt (M, Figure 12) to increase
the space between upper and lower press
rolls.
4. Insert the material between the upper and
lower rolls, and tighten the bolt (M, Figure
12) to lower the upper roll, until the material
fits snugly. The upper roll must have
sufficient pressure on the work piece to feed
properly.
5. Rotate both idle roll screws (L, Figure 12) to
adjust the idle roll’s proximity to the two
main rollers. Raise both ends an equal
amount.
6. Run the workpiece through the machine
using the operating lever. If the workpiece is
large, make sure it receives proper support
as it exits the slip roll machine.
7. Make further passes of the workpiece,
raising the idle roll incrementally before
each pass, until the desired radius is
achieved.
No exact formula can be followed when making
roll adjustments because material “spring-back”
varies with the kind of material being formed.
Only by test forming several pieces can the
correct adjustments be obtained. Also, keep in
mind that it is much easier to re-pass material to
make a smaller radius than to attempt to
increase a radius that was made too small.
The idle roll must be adjusted exactly parallel or
the material will spiral during the rolling process.
Measure each end of the opening with calipers if
greater precision is required.
Deliberately setting the rolls non-parallel can be
used to make cone shapes.
Figure 12