Method of producing iron core and apparatus for producing iron core

Abstract

An iron core-producing method of the invention includes at least the step of blanking an iron core T from a strip W in such a manner that a longitudinal direction of the substantially linear iron core T is inclined relative to a direction of a width of the strip W. An iron core-producing apparatus of the invention for blanking a substantially linear iron core T from a strip W includes at least a punch disposed such that its longitudinal direction is inclined relative to a direction of a width of the strip W, and a die 13 which is provided beneath the punch, and is disposed such that its longitudinal direction is inclined relative to the direction of the width of the strip W.

1 . An iron core-producing method for blanking a substantially linear iron core from a strip, comprising the step of: 
 blanking the iron core from the strip in such a manner that a longitudinal direction of the iron core is inclined relative to a direction of a width of the strip.    
   
   
       2 . The method as claimed in  claim 1 , further including the step of changing an angle of inclination of the iron core relative to the direction of the width of the strip in accordance with a length of iron cores to be produced.  
   
   
       3 . An iron core-producing apparatus for blanking a substantially linear iron core from a strip, comprising: 
 a punch disposed such that its longitudinal direction is inclined relative to a direction of a width of the strip; and    a die which is provided beneath said punch, and is disposed such that its longitudinal direction is inclined relative to the direction of the width of the strip.    
   
   
       4 . The apparatus as claimed in  claim 3 , further including means for changing an angle of inclination of the punch and the die in accordance with a length Y of iron cores to be produced.  
   
   
       5 . The apparatus as claimed in  claim 3 , further comprising another set of the punch and the die, so that the punched cores are mated with each other.  
   
   
       6 . The method as claimed in  claim 1 , wherein an angle of the inclination of the iron core is set in a range from 20° to 70°.  
   
   
       7 . The apparatus as claimed in  claim 3 , wherein an angle of the inclination of the punch and the die is set in a range from 20° to 70°.