| 摘要 |
PROBLEM TO BE SOLVED: To provide a profile steel bending machine capable of bending an U type and a C type angle steel in a high precision and without mechanical damage. SOLUTION: An abutt bending roller 18L is roughly provided with a large roller 20L to abutt on the outside part of a C type angle steel 16, a small roller 21L to abutt on the inner face of the side part opposite to the large roller abutt side, a small roller support base 22L to support the small roller 21L revolutable around the rotation axis of the large roller 221 and a gear mechanism 23L to synchronize shaft rotation speeds so as to enable abutt feed in the same feed direction as the C type angle steel 16 simultaneously abutted with the large/small rollers. By using three of the abutt bending rollers, one angle steel is alternately engaged/inserted from both sides by imparting the bending moment from the side through these three point supports and simultaneously rotating each roller, the bending while maintaining a cross section shape is made possible.
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