| 摘要 |
PROBLEM TO BE SOLVED: To reduce an operation error by facilitating the operation of a bending roll machine which bends a plate and forms a cylindrical part. SOLUTION: In a bending roll machine in which a sheet metal is sandwiched between a press roller 1 and receiving rollers 2, 3, the operation for forming a circular shape is repeated while feeding with applying pressure by the press roller 1 and a cylindrical part is formed in the end, a reversing position identification means 5, which identifies that a sheet metal is sent to an end part and reaches the position to be reversed in an initial feeding time, is arranged, a feed direction of the plate body is reversed by the reversing position identification means 5 at and after a next feed operation.
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