Southbend SB1022 - Manual (Page 33)

For Machines Mfg. Since 8/09 Model SB1021/SB1022
-31-
O P E R A T I O N
17. Re-clamp the blade in the welding clamps
with the joint centered, then repeat the
annealing process twice more. Each time
gradually reduce the amount of time you
anneal the weld.
18. Test the strength and flexibility of the weld
by bending the blade in an arc similar to that
of the bandsaw wheels. The blade should
bend in a smooth circular, rounded shape—
rather than a pointed fold (see Figure 31).
Correct
Not Correct
(Cut and reweld)
Figure 31. Correct blade weld bend for strength and
flexibility.
13. Press and hold the annealing button until
the weld zone turns the appropriate color,
then release the button.
Note: If you cannot get the proper annealing
color from the blade manufacturer, use the
recommendations below as a baseline and
experiment from there.
—Carbon Steel ..................... Dull Cherry Red
—Carbon Steel Hard Back ...................... Blue
—Bi-Metal ........................................... Orange
—High Speed Steel .............. Dull Cherry Red
14. Repeat Step 13 three to four more times,
allowing the weld to cool for about 30
seconds between each repetition. Each time
reduce the amount of time you press the
anneal button, to reduce the amount of heat
successively.
15. Allow the blade to cool, then re-inspect the
weld.
16. Grind away the weld bead on the top and
bottom of the joint so that the blade is flat
and will run smoothly on the wheels and
between the blade guides.
Note: Make sure not to grind the teeth or
blade body, or overheat the blade during
grinding—this will weaken the blade. A
small amount of ticking is acceptable during
cutting operations.