Method and device for reinforcing crankshafts

Abstract

The present invention relates to a device and a method for surface rolling crankshafts at the transition radii of bearing journals. The method for surface rolling the transition radii of crankshafts comprises the following steps: providing at least one roller element for applying at least one force to the workpiece; providing at least one support element for supporting the workpiece against a force applied by a roller element; displacing the at least one roller element and/or the at least one support element such that the at least one support element, and the at least one roller element, perform a displacement relative to each other, the displacement having a linear component. The present invention further provides a roller element for surface rolling the transition radii of crankshafts having a substantially linear contact surface for introducing at least one surface rolling force into a crankshaft, and a corresponding device.

1 . Method for roll-solidifying the transition radiuses of crankshafts comprising the steps of
 providing at least one roller element for introducing at least one force into the work piece;   providing at least one support element for supporting the work piece against a force introduced by a roller element;   moving the at least one roller element and/or the at least one support element in such a manner that the at least one support element and/or the at least one roller element perform a movement relative to each other and/or relative to a work piece, characterized in that said movement comprises a linear component.   
   
   
       2 . The method according to  claim 1 , wherein the relative movement between the at least one support element and the at least one roller element essentially comprises a linear component or essentially consists of a linear component. 
   
   
       3 . The method according to  claim 1 , wherein the at least one support element and the at least one roller element move in opposite directions along the linear component. 
   
   
       4 . The method according to  claim 1 , wherein the work piece arranged between the at least one support element and the at least one roller element performs a movement comprising a rotational component. 
   
   
       5 . The method according to  claim 1 , wherein the work piece arranged between the at least one support element and the at least one roller element performs a movement comprising a rotational component and a linear component. 
   
   
       6 . The method according to  claim 1  comprising the step of moving the at least one roller element and/or the at least one support element along a path with a linear component and a rotational component, wherein the linear component is preferably greater and particularly preferred substantially greater than the rotational component. 
   
   
       7 . The method according to  claim 1 , wherein the at least one roller element and/or the at least one support element do not rotate around their own axis. 
   
   
       8 . A roller element for roll-solidifying the transition radiuses of crankshafts particularly according to  claim 1 , characterized in that said roller element comprises an essentially straight contact surface for introducing at least one roll-solidifying force into a crankshaft. 
   
   
       9 . The roller element according to  claim 8 , wherein the essentially straight contact surface of the roller element extends in a longitudinal direction of the roller element and has at least partially a concave and/or convex shape along said longitudinal direction. 
   
   
       10 . The roller element according to  claim 8 , wherein the contact surface of the roller element does not have a circular shape. 
   
   
       11 . The roller element according to  claim 8 , wherein the contact surface of the roller element has a length of about 0.1 m to about 5 m, preferably of about 0.3 m to about 2 m, particularly preferably of about 0.5 m to about 1.5 m and more preferably of about 1 m. 
   
   
       12 . The roller element according to  claim 8 , wherein the contact surface of the roller element comprises a radius for roll-solidifying of about 0.5 mm to about 5 mm, preferably of about 1 mm to about 3 mm and particularly preferably of about 1.5 mm to about 2 mm. 
   
   
       13 . A device having a roller element according to  claim 8  for solidifying work pieces. 
   
   
       14 . A device for roll-solidifying the transition radiuses of crankshafts, particularly according to  claim 1 . 
   
   
       15 . A device for roll-solidifying the transition radiuses of crankshafts particularly according to  claim 13  having at least one roller element for introducing at least one roll-solidifying force into the workpiece and at least one support element for supporting the work piece against the force introduced by the roller element, wherein the at least one roller element and/or the at least one support element is formed in a manner that it comprises an essentially straight contact surface for introducing the at least one roll-solidifying force into the crankshaft or for supporting the work piece. 
   
   
       16 . The device according to  claim 13 , wherein the device comprises means for generating a relative movement having a linear component between the at least one roller element and the work piece and/or the at least one support element. 
   
   
       17 . The device according to  claim 13 , wherein the device comprises means for generating a relative movement between the at least one roller element and the work piece and/or the at least one support element, the relative movement essentially comprising a linear component or essentially consisting of a linear component. 
   
   
       18 . The device according to  claim 13 , wherein the device comprises means for relatively moving the at least one roller element and the at least one support element in opposite directions along a linear component. 
   
   
       19 . The device according to  claim 13 , wherein the device is configured in such a manner that a work piece arranged between the at least one roller element and the at least one support element performs a movement comprising a rotational component. 
   
   
       20 . The device according to  claim 13 , wherein the device is configured in such a manner that a work piece arranged between the at least one roller element and the at least one support element performs a movement comprising a rotational component and a linear component. 
   
   
       21 . The device according to  claim 14 , wherein the device comprises means for moving the at least one roller element and/or the at least one support element along a path having a linear component and a rotational component wherein the linear component is preferably greater and particularly preferably substantially greater than the rotational component. 
   
   
       22 . The device according to  claim 13 , wherein the at least one roller element and/or the at least one support element cannot be rotated around their own axes.