Method and device for cylindrical grinding

Abstract

A method for cylindrical grinding of cylindrical workpieces on a grinding machine, in which an axes of rotation of a grinding disc and of the workpiece are aligned in parallel to one another and the grinding disc is moved relative to the workpiece in a longitudinal-axial direction of the workpiece during the grinding process. A first grinding disc is followed by a second grinding disc at a continuously constant distance. The distance is determined by the width of the first grinding disc and the remaining grinding parameters, such as the rotational speeds of the first grinding disc and of the workpiece and the feed rate in the longitudinal-axial direction, such that the second grinding disc grinds the helical error lines generated by the first grinding disc during the grind process. A control device adjusts the distance between the first and second grinding discs.

1 . A method for cylindrical grinding of cylindrical workpieces on a grinding machine, the method comprising the steps of:
 aligning axes of rotation of a first grinding wheel and a workpiece parallel to one another;   moving the first grinding wheel relative to the workpiece during grinding in a longitudinal axial direction of the workpiece;   providing a second grinding wheel that follows the first grinding wheel at an always constant distance, the distance being determined by a width of the first grinding wheel and other grinding parameters comprising rotational speeds of the first grinding wheel and of the workpiece; and   determining a [[the]] feed of the second grinding wheel in the longitudinal axial direction such that the second grinding wheel grinds the helical fault lines that the first grinding wheel has produced during grinding.   
     
     
         2 . A method according to  claim 1 , wherein the first and the second grinding wheel ( 12 ,) are mounted on a same axis of rotation and are driven at a same rotational speed during grinding. 
     
     
         3 . A method according to  claim 1 , wherein both grinding wheels are applied to a same contact pressure during grinding. 
     
     
         4 . A method according to  claim 1 , wherein the grinding wheels on the one hand and the workpiece on the other hand are rotated in opposite directions or in a same direction, but at different rotational speeds. 
     
     
         5 . A grinding device comprising:
 a first grinding wheel configured to be driven to rotate about an axis of rotation which runs parallel to the longitudinal axis of a workpiece to be machined;   a feed device which causes a relative movement between the workpiece and the grinding wheel in the longitudinal axial direction of the workpiece;   a second grinding wheel arranged rotatably at a distance from the first grinding wheel; and   a control device configured to adjust a distance between the first and the second grinding wheel in such a way that the second grinding wheel sweeps over a helical fault line that the first grinding wheel previously produced.   
     
     
         6 . A grinding device according to  claim 5 , wherein both grinding wheels are arranged on a same axis and have a common variable or controllable drive. 
     
     
         7 . A grinding device according to  claim 5 , wherein the distance between the first grinding wheel and the second grinding wheel can be adjusted. 
     
     
         8 . A method according to  claim 2 , wherein both grinding wheels are applied to a same contact pressure during grinding. 
     
     
         9 . A method according to  claim 8 , wherein:
 the grinding wheels are rotated in one direction and the workpiece is rotated in a direction opposite to the one direction; or   the grinding wheels are rotated in one direction and the workpiece is rotated in a same direction top the one direction but at a different rotational speed.   
     
     
         10 . A method according to  claim 2 , wherein:
 the grinding wheels are rotated in one direction and the workpiece is rotated in a direction opposite to the one direction; or   the grinding wheels are rotated in one direction and the workpiece is rotated in a same direction top the one direction but at a different rotational speed.