Roll-hardening device in a roll-hardening machine for crankshafts

Abstract

The deep-rolling device ( 8 ) of a deep-rolling machine ( 1 ) for crankshafts ( 3 ) is made in scissor construction. Two swivellable scissor arms ( 9, 10 ) opposite each other each carry a deep-rolling roller head ( 13 ) or a backing roller head ( 14 ) respectively. The backing roller head ( 14 ) is fitted with two parallel-axis backing rollers, the rotational axes of which lie in a common plane. The backing roller head ( 14 ) also has an axial guide which is arranged in front of the backing rollers in swivel direction ( 35 ) for closing, the longitudinal axis of which guide stands perpendicular to the rotational axis of the crankshaft ( 3 ) and lies in a plane which forms an acute angle with the common plane of the rotational axes of the backing rollers, and the axial width of which is greater than the width of the backing roller head ( 14 ) and slightly smaller than the distance of adjacent oil collars of a main bearing journal or big end bearing journal.

1 . Deep-rolling device of a deep-rolling machine for crankshafts designed in scissor construction with two swivellable scissor arms lying opposite each other, each carrying a deep-rolling roller head or a backing roller head respectively, where the backing roller head is fitted with two parallel-axisly arranged backing rollers of which the rotational axes lie in a common plane, with a drive device which generates the closing and opening movement of the deep-rolling machine and the deep-rolling force, wherein the backing roller head has at least one axial guide 
 which in swivel direction is arranged in front of the backing rollers to close the scissor arm carrying the backing rollers,    the longitudinal axis of which is perpendicular to the rotational axis of the crankshaft and lies in a direction which encloses an acute angle with the plane of the rotational axes of the backing rollers, and    the axial width of which is greater than the width of the backing roller head and slightly less than the distance of the oil collars of a main bearing journal or big end bearing journal.    
   
   
       2 . Deep-rolling device according to  claim 1 , wherein the acute angle is 0° and the longitudinal axis of the axial guide has a distance from the plane.  
   
   
       3 . Deep-rolling device according to  claim 1 , wherein the axial guide has a contour which is prismatic, cylindrical, crowned or composed of different geometric sections.  
   
   
       4 . Deep-rolling device according to  claim 1  wherein several axial guides are allocated to each of two backing rollers, the axial width of which guides is less than the width of the backing roller head and the outer width of which is slightly less than the distance of the oil collars of a main bearing journal or big end bearing journal.