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Cold roll forming equipment forming
roller to move the body and forming, it is divided into two categories
according to the structure: the overall shape of the roller and the combination
forming roller. The disadvantage of the integral forming roller is to
manufacture complex, and can not replace the easy wear part of the pass, so it
is not widely used. The advantages of combination and forming is various and
has the advantages of simple processing, can be replaced individually pass in
the easy wear parts, gaskets are available to correct pass in the roll gap,
roll specifications can be unified, thereby reducing forming machine of molding
and reserves. Therefore, this kind of molding and get wide application. But the
combination of roll forming and disadvantages, produced in the shape of the
axial force is transferred to the roller of the fastening nut, the groove width
change, affect the product size precision, now Caigang equipment, C type steel
equipment are also using this combination of forming rollers.
Roll forming equipment, the surface
shall be free from bubbles, cracks, scarring, folding, inclusion, and edge
delamination, allowing not greater than 10% of nominal thickness slightly
concave, convex, indentation, hairline, bruises, and pressed into the iron
oxide.
The surface defects of the cold roll
forming equipment can be cleaned up by the method of repairing and grinding,
but the depth of the cleaning shall not exceed 10% of the nominal thickness.
For cold formed steel with high
surface quality, the technical conditions of the surface quality should be
agreed.
Cold formed welded hollow steel welded
joints shall not be opened, welded, burned, and serious dislocation. The burr
at the weld shall be removed, and the inner burr of the weld shall not be
cleaned.
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