Method of manufacturing a bent product and an apparatus and a continuous line for manufacturing the same

A manufacturing apparatus for manufacturing a product by bending which intermittently or continuously has a bent portion which is curved two-dimensionally or three-dimensionally and quenched portion in the lengthwise direction and/or the circumferential direction in a plane crossing the lengthwise direction formed by performing bending downstream of a support means while feeding a metal material which is a material being worked and which is supported by the support means from an upstream side towards a downstream side, characterized by comprising:

• a heating means for heating a portion of the metal material, said heating means surrounding the outer periphery of the metal material and being disposed downstream of the support means, and a cooling means which is disposed downstream of the heating means and which sprays a cooling medium at the portion of the metal material which was heated by the heating means to quench the heated portion of the metal material,
• a movable roller die which is disposed downstream of the cooling means so as to be able to change its position two-dimensionally or three-dimensionally and which has a plurality of rolls which support the metal material which was heated by the heating means so that the metal material can move in the axial direction and which performs bending of the metal material being fed in the axial direction by imparting a bending moment to the a portion of the metal material was heated by the heating means, and
• a support guide which is disposed downstream of the movable roller die and which suppresses errors in the metal material after the bending by supporting a portion of the metal material which has exited from the movable roller die.