Method and device for applying compressive and/or tractional forces to essentially rod-shaped workpieces consisting of electroconductive and/or magnetisable material

Abstract

The disclosure relates to a method for applying compressive and/or tractional forces to an essentially rod-shaped workpiece, according to which a mechnical engagement in the rod-shaped workpiece can be avoided. To this end, the method involves applying compressive and/or tractional forces to an essentially rod-shaped workpiece including an electroconductive and/or magnetizable material. A magnetic field is applied to the workpiece, including a gradient in the direction of the force to be applied. The disclosure also relates to a device for applying compressive and/or tractional forces to an essentially rod-shaped workpiece including electroconductive and/or magnetizable material. The device includes a coil arrangement that is supplied by a current and is designed to produce a magnetic field having a gradient.

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       14 . Method for applying compressive and/or tractive forces on a rod-shaped workpiece comprising electrically conductive and/or magnetizable material, the method comprising: applying a magnetic field on the workpiece comprising a gradient pointing in a direction of a force to be applied, wherein a current flowing through a coil arrangement is modified periodically as a function of time with a frequency that corresponds to a resonance frequency for a maximum force to be applied on the workpiece.  
   
   
       15 . Method pursuant to  claim 14 , wherein the magnetic field is generated by the coil arrangement comprising at least two coils that are arranged around the workpiece axially spaced from each other, wherein wherein the at least two coils are flowed through by a current, respectively, for the purpose of generating different magnetic fields.  
   
   
       16 . Method pursuant to  claim 15 , wherein the at least two coils each are flowed through by a current, wherein the currents flowing through the individual coils are out-of-phase and/or have different current strengths.  
   
   
       17 . Method pursuant to  claim 15 , wherein the current flowing through the coil arrangement is modified as a function of time.  
   
   
       18 . Method pursuant to  claim 15 , wherein the coil arrangement is cooled.  
   
   
       19 . Method pursuant to  claim 14 , wherein the workpiece is electrically conductive and subjected to current through flow.  
   
   
       20 . Method pursuant to  claim 14 , wherein the workpiece is cooled.  
   
   
       21 . Method pursuant to  claim 14 , wherein the compressive and/or tractive forces are applied to the workpiece for the purpose of transporting and/or forming the same.  
   
   
       22 . Device for applying compressive and/or tractive forces on a rod-shaped workpiece comprising electrically conductive and/or magnetizable material, the device comprises: a coil arrangement that is adapted to be acted upon by current for generating a magnetic field comprising a gradient pointing in the direction of the force to be applied on the workpiece.  
   
   
       23 . Device pursuant to  claim 22 , wherein the coil arrangement comprises at least two coils, which can be acted upon by a current that can be adjusted individually for each coil by means of a control unit.  
   
   
       24 . Device pursuant to  claim 23 , wherein the coils are arranged around a workpiece path in a concentric manner and in the axial direction of the rod-shaped workpiece at a distance from each other, wherein along said path compressive and/or tractive forces are supposed to be applied on the workpiece.