17
17
5. Insert the work-piece between the dies and slowly begin turning the crank handle feeding the
work-piece through the die set. Check the work-piece. It may be necessary to fine tune the
adjustment to the depth of the bead to reach the desired bead depth.
6. Slowly turn the crank handle and feed the metal in from the desired side of the machine.
7. When the material has been fed through the rolls for one pass, either remove the material if
the bead is complete, or reverse the crank rotation to feed the material back in the opposite
direction increasing the pressure on the rolls.
8. This may be repeated until the desired bead is achieved.
MATERIAL SELECTION
When selecting materials keep these instructions in mind:
•
Material must be clean and dry. (without oil)
•
Material should have a smooth surface so it processes easily.
•
Dimensional properties of material must be consistent and not exceed the machine capacity
values.
•
Chemical structure of material must be consistent.
•
Buy certificated steel from the same vendor when possible.
UNDERSTANDING SPRINGBACK
Springback, also known as elastic recovery, is the result of the metal wanting to return to its
original shape after undergoing compression and stretch. After the bending leaf is removed from
the metal and the load is released, the piece part relaxes, forcing the bent portion of the metal to
return slightly to its original shape. The key to obtaining the correct bend angle is to over bend
the metal a little and allow it to spring back to the desired angle. All metals exhibit a certain
amount of spring back.
CAUTION:
It must be determined by the customer that materials being
processed through the machine are NOT potentially hazardous to operator or
personnel working nearby.
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