PURPOSE:To perform a correct axial line bending by controlling by driving the base stand rockable in a see-saw state, the rising frame rockable and rotatable in the horizontal direction and the mouthpiece device rockable and rotatable in the vertical direction based on the feeding command of the material to be worked. CONSTITUTION:A control device 8 places the driving command corresponding to the necessary bending shape, when a detecting device 2 detects the prescribed feeding of the material X to be worked. A see-saw like rocking and rotating mechanism part 4 applies the twisting in the axial line direction on the material X to be worked by rocking the base stand 40 to the right and left. The rocking and rotating mechanism part 5 in the horizontal direction bends the axial line direction of the material X to be worked to the right and left by rotating the rising frame 50 in clockwise or counter clock wise direction. The rocking and rotating mechanism part 6 in the vertical direction performs the axial line bending of the material X to be worked up and down by tilting the mouthpiece device 60 to the upper and lower. Said control is performed independently or synchronously respectively. In this way the accurate axial line bending of a long sized work is performed.
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