To prevent the generation of galling by reducing the face pressure on a gyroscope die in the time of bending, at the same time, to elongate the twist limit by preventing returning of twisting a work, and further, to prevent the generation of galling by reducing the face pressure on the gyroscope die in the time of twisting.

A gyroscope die 3 is divided in plural numbers of divided gyroscope dies 3a, 3b in the work conducting direction, a driving device 6 of making any one divided gyroscope die 3a among these divided gyroscope dies 3a, 3b to turn, displace and rotate is provided, and the rest divided gyroscope die 3b is held making the work conducting direction as its axial line on a driven divided gyroscope die 3a.