Wire bending device

Abstract

The invention concerns a wire bending device comprising a bending head ( 3 ) bearing two bending tools ( 30, 31 ) between which the wire to be bent ( 2 ) is passed, each of the tools being capable of being driven in rotation concentrically around the other which is then fixed It comprises: mechanical means ( 1 ) for moving the wire to be bent ( 2 ) axially in one direction or another (X A , X B ); mechanical mans for driving the tools ( 30, 31 ) in rotation, in the two directions (Y A , Y B ), about an axis ( 34 ) parallel to those ( 32, 33 ) of the tools ( 30, 31 ); mechanical means for moving in the two directions (Z A , Z B ) the tools ( 30, 31 ) in a plane perpendicular to the axis ( 34 ) about which the latter can rotate; and calculating and controlling means for managing simultaneously the operation of the mechanical means so that the movements generated by the latter are superimposed.

What is claimed:  
     
         1 . Wire bending device of the type comprising one bending head carrying two bending tools between which passes the wire to be bent, each one of said tools being capable of being driven in rotation concentrically around the other one, which is then fixed, characterized in that it comprises: 
 mechanical means ( 1 ) capable of shifting the wire to be bent axially in one direction or another (X A , X B ),    mechanical means capable of driving said bending tools ( 30 ,  31 ) in rotation, in botli directions (Y A , Y B ), around an axis ( 34 ) parallel to those ( 32 ,  33 ) of said tools ( 30 ,  31 ),    mechanical means capable of shifting, in both directions Z A , Z B ), said tools in a plane perpendicular to the axis ( 34 ) around which the latter can rotate,    and computation and control means capable of governing the simultaneous operation of said mechanical means, so as to obtain a superposition of the movements the latter generate.    
     
     
         2 . Device according to  claim 1 , characterized in that the axis ( 34 ) around which the tools ( 30 ,  31 ) can rotate is arranged at the intersection of the axis of displacement of the wire to be bent ( 2 ) and a line joining the axes of the tools ( 32 ,  33 ).  
     
     
         3 . Device according to  claim 1  or  claim 2 , characterized in that the bending tools consist of rollers ( 30 ,  31 ).  
     
     
         4 . Device according to any of the preceding claims, characterized in that the mechanical means consist of stepping motors associated with transmission means.  
     
     
         5 . Device according to any of the preceding claims, characterized in that the bending head ( 3 ) is mounted in rotation on an arm, which is, in turn, mounted pivotally with respect to feeding means ( 1 ) for the wire to be bent ( 2 ).