Device for deep-rolling transition radii on crankshafts

Abstract

Disclosed is a device for deep-rolling transition radii ( 5, 6 ) of crankshafts ( 1 ). Said device comprises at least one ruler-shaped rolling element ( 12, 13 ) that can be moved back and forth in one direction and has a substantially rectilinear contact surface ( 14, 15 ), a corresponding guiding surface for introducing a deep-rolling force (F) into a transition radius ( 5, 6 ) of a crankshaft ( 1 ), said guiding surface lying across from the guiding surface ( 14, 15 ) at a certain distance, and a means which generates a guiding and pressing force of the rolling element ( 12, 13 ). Said means consists of a guiding roller ( 29 ) which is rotatably mounted in the housing ( 18 ) of a deep-rolling tool ( 11 ) and has a circular guiding surface ( 24, 25 ) in relation to the guiding roller ( 29 ). The guiding surface of the rolling element ( 12, 13 ) adapts to said circular guiding surface ( 24, 25 ).

1 . Device for deep-rolling transition radii on crankshafts, having at least one straight-edged roller element which may be moved back and forth in a direction and which has an essentially linear contact surface, a corresponding guide surface spaced at a distance opposite from the guide surface for introducing a deep-rolling force into a transition radius of a crankshaft, and a means which produces guiding and a pressure force for the roller element, characterized in that the means
 is composed of a guide roller which   is rotatably mounted in the housing of a deep-rolling tool and, with reference to the guide roller,   has a circular guide surface to which the guide surface of the rolling element conforms.   
     
     
         2 . Device according to  claim 1 , characterized in that the cross sections of the guide surfaces of the guide roller and of the roller element are curved. 
     
     
         3 . Device according to  claim 1 , characterized in that the contact surface of the roller element has a first corner radius which is smaller than the second corner radius of the guide surface. 
     
     
         4 . Device according to  claim 1 , characterized in that the contact surface of the roller element is curved in its longitudinal extension. 
     
     
         5 . Device according to  claim 1 , characterized in that the guide roller is mounted in the housing so as to be movable in the axial direction. 
     
     
         6 . Device according to  claim 1 , characterized in that two parallel roller elements are provided which are held by at least one captive retainer. 
     
     
         7 . Device according to  claim 1 , characterized in that the roller elements are mounted so as to be pivotable about a longitudinal axis. 
     
     
         8 . Device according to  claim 1 , characterized in that guide support rollers are provided as additional support of the roller elements in their respective longitudinal extension.