Method for the multi-core deburring of wires and associate

Abstract

The invention relates to a method for the multi-core deburring of wires, preferably wires ( 1 ) separated from a wire strip comprising a plurality of wire strips which are arranged parallel to each other, in particular for producing round wires and shaped wires. The wires ( 1 ) are, after passing through a pair of separating rollers ( 3 ), separated by a separating roller unit ( 4 ) according to even-numbered and odd-numbered wires, such that two stands of mutually distanced wires ( 1 ) are formed. Both of the wire strands ( 1 ) then traverse according to an adjustable tensile stress, respectively a deburring station provided with deburring blades. The tensile stress is selected in such a manner that after taking into account the notch angle and the blade angle of the deburring blades, the wires ( 1 ) undergo an automatic, central alignment ensuring chips are removed in a uniform manner on both sides of said wires ( 1 ). Subsequently, the wires ( 1 ) are brought together in a traction unit ( 6 ) comprising rollers to again form a common strand of wires ( 1 ). The invention also relates to a corresponding device.

1 . A method for simultaneously deburring a multiplicity of wire conductors separated from a wire conductor ribbon and parallel to each other for producing round and shaped wires, wherein a sheet metal ribbon is first pregrooved on one or both sides so as to create the wire conductors of the wire conductor ribbon, after which the wire conductors still connected after grooving by webs undergo a flexing process so as to convert the webs into thin frangible webs that are easily separable from each other and that form smooth and nearly burr-free edges when detached, each web undergoing repeated bending deformation about its longitudinal axis in such a way that incipient cracks forming the frangible web are created by fatigue failure at the webs, wherein the frangible web can also be opened locally, characterized in that the wire conductors, after passing through a separating roller pair, are spread apart according to even-numbered and odd-numbered wire conductors by a spreading roller unit such that two arrays of relatively spaced wire conductors are created, wherein furthermore the two arrays of wire conductors pass under adjustable tension through respective deburring stations provided with respective deburring cutters, the draw tension being selected such that an automatic, central alignment, and thus a two-sided uniform removal of chips, is effected on the wire conductors due to the action of the groove-flank angle and of the adjusted angle of the deburring cutters, and wherein finally the wire conductors are reunited into a common group of wire conductors by rollers of a drawing unit. 
     
     
         2 . The method according to  claim 1 , wherein the deburring station includes a comb-like deburring device that is provided with tines that form the deburring cutters. 
     
     
         3 . The method according to  claims 1  wherein the drawing unit downstream of the deburring station generates the draw tension intended for deburring as well as the draw force required to advance the wire conductors, and the separating roller pair and the spreading roller unit generate an opposing braking force, and both units are provided with guide grooves for the wire conductors. 
     
     
         4 . The method according to  claim 1  wherein the wire conductors are not subjected to restricted guidance in the horizontal plane so as to provide a uniform, two-sided deburring operation in the region upstream and downstream of the deburring station. 
     
     
         5 . The method according to  claim 1  wherein the wire conductors are guided vertically upstream of each of the deburring devices only under light applied pressure across one respective smooth guide roller. 
     
     
         6 . The method according to  claim 1  wherein the conductor ribbon passes through a welding station before entering the separating roller pair, in which station a new conductor ribbon is welded on when the end of a conductor ribbon has been reached such that the individual wire conductors are flush with each other. 
     
     
         7 . The method according to  claim 6 , wherein the welding bead formed on the welding seam is ground flat on both sides of the conductor ribbon, and the welding bead at the grooves is also almost completely removed by an appropriately shaped tool by bilaterally and simultaneously grinding the top side and bottom side of the conductor ribbon. 
     
     
         8 . An apparatus for carrying out the method according to  claim 1 , comprising:
 a deburring station for a conductor ribbon that is formed from a metal sheet in which wire conductors still connected by webs after grooving undergo a flexing process so as to then transform the webs into thin frangible webs that are easily separable from each other and form smooth and nearly burr-free edges when detached, whereby, after undergoing repeated bending deformation about their longitudinal axis, incipient cracks forming the frangible webs are created by fatigue failure at the webs, which frangible web can also be opened locally, wherein the deburring station includes a separating roller pair that separates the wire conductor ribbon into wire conductors, furthermore by a spreading roller unit in which even-numbered wire conductors are spread apart relative to uneven-numbered wire conductors such that two arrays of mutually spaced wire conductors are created, furthermore by a respective deburring device for each of the two arrays of wire conductors, as well as   rollers forming a drawing unit in which the wire conductors are reunited into a common group, so that approximately the same tension acts on all wire conductors.   
     
     
         9 . The apparatus according to  claim 8 , wherein the deburring device includes tines arranged like in a comb and forming deburring cutters. 
     
     
         10 . The apparatus according to  claim 9 , wherein the tines are oriented at an acute angle to the travel direction of the wire conductors. 
     
     
         11 . The apparatus according to  claim 9  wherein the tines are oriented at an angle of approximately 45° to the wire conductors. 
     
     
         12 . The apparatus according to  claim 9  wherein the deburring device is adjustable in the longitudinal direction of the tines. 
     
     
         13 . The apparatus according to  claim 9  wherein the rollers of the spreading roller unit and the drawing unit are provided with guide grooves for the wire conductors.