Electromagnetic forming device

Abstract

The present invention is to enable accurate formation of an elongate member while suppressing the occurrence of a shape defect. An electromagnetic forming device is provided with an electromagnetic coil, and a forming mold which is disposed along the electromagnetic coil and provides an elongate material to be formed with a formed shape. An electromagnetic force generated by means of the electromagnetic coil is caused to act on the material to be formed and the material to be formed is pressed onto the forming mold. In the electromagnetic forming device, the forming mold has a cross sectional shape that varies from one end to another in a longitudinal direction of the material to be formed. The forming mold is formed such that, as the material to be formed is moved parallel to the longitudinal direction, the shape of the material to be formed is gradually changed to a desired shape.

1 . An electromagnetic forming device comprising:
 an electromagnetic coil; and   a forming die installed along the electromagnetic coil so as to provide a formed shape for a forming target material having an elongated shape,   wherein an electromagnetic force generated by the electromagnetic coil is applied to the forming target material so that the forming target material is pressed against the forming die,   wherein the forming die has a cross-sectional shape which differs from one end side thereof toward the other end side thereof along a longitudinal direction of the forming target material, and   wherein in the forming die, the forming target material moves parallel to the longitudinal direction so that the forming target material is formed to be gradually changed into a desired shape.   
     
     
         2 . The electromagnetic forming device according to  claim 1 ,
 wherein the electromagnetic coil is continuously formed along the forming die.   
     
     
         3 . The electromagnetic forming device according to  claim 1 ,
 wherein a plurality of the electromagnetic coils are installed, and   wherein the plurality of electromagnetic coils are respectively shorter than the forming target material, and are installed along the longitudinal direction of the forming target material.   
     
     
         4 . The electromagnetic forming device according to  claim 1 ,
 wherein a plurality of the forming dies are installed, and   wherein the plurality of forming dies are respectively shorter than the forming target material, and are installed along the longitudinal direction of the forming target material.   
     
     
         5 . The electromagnetic forming device according to  claim 4 ,
 wherein the plurality of forming dies have an inclined surface formed in an end portion.   
     
     
         6 . The electromagnetic forming device according to  claim 4 ,
 wherein the plurality of forming dies are formed to give the forming target material a recessed shape or a projecting shape in the longitudinal direction.