7. Assembly of a Band Sawing Machine
Figure 16 Assembly of a band
sawing machine 1 adjustable saw blade sheathing, 2 hand wheel to chuck the
saw blade, 3 saw blade, 4 machine table, 5 stop rule, 6 contact/or exhaust
facility, 7 casing with lower saw band roll and motor, 8 stand
Stand:
The cast iron stand bears the upper and lower band roll, the
machine table and the drive motor of the lower band roll.
Machine table:
The machine table is adjustably supported for undertaking angle
cuts. The machine table features an adjustable and pivoted stop rule for
parallel cuts.
Figure 17 Adjustability of
facilities 1 shifting the stop rule, 2 chucking the saw blade, 3
shifting the saw blade sheathing. 4 tilting the machine table
Band rolls:
The lower band roll is firmly pivoted and driven by a motor.
The top band roll is positioned vertically above the lower band
roll. It can be adjusted by means of a hand wheel for chucking the saw blade
heightwise.
The shaft of the top band roll is inclined towards the running
setting of the band saw blade.
The band rolls have rubber bandages for improved adhesive power
of the saw blade.
Check that rubber bandages are clean and not damaged
or worn!
Saw blade sheathing:
Both band rolls and the band saw blade section not required for
cutting are sheathed. The adjustable saw blade sheathing can be set to the
thickness of the material to be cut.
Saw blade guidance:
The top saw blade guidance above the table can be set heightwise
to material thickness. The guidance positioned below the machine table is rigid.
The saw blade guidance consists of lateral and back guide rolls which absorb the
feed pressure of the workpiece.
Figure 18 Assembly of saw
blade guidance 1 top saw blade guidance, 2 band saw blade, 3 machine table, 4
lower saw blade guidance, 5 lateral guide role, 6 rear guide rolls
The saw blade teeth must protrude beyond the guide rolls so that
the saw blade slides easily through the guide rolls.
The band saw blade is properly set when the unstressed saw blade
extends 2 mm plus tooth height above the lateral guide rolls and is then 1 mm
away from the back guide roll.
Regulating the top saw blade guide should be
possible without any danger whilst the machine is running!
Saw blade guides must guarantee smooth saw blade running. The
saw blade sections not used for sawing should be sheathed until they are shortly
beyond the workpiece surface.
The saw blade run of the machine table must not exceed 3 mm in
width!
The correct setting of the guide rolls must be constantly
checked!
Relieve the saw blade during longer machine standstill
periods.
Why is the machine table
adjustable?
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Why is the top band roll movably
pivoted?
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Why do the band rolls have rubber
bandages?
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How shall the saw blade guidance be
set?
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What must be done during longer machine standstill
periods?
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