Method and Device for Precision Machining of Toothed and Hardened Work Wheels

Abstract

A method for machining toothed and hardened work wheels, includes: mounting a work wheel that is hardened and pre-toothed with an allowance onto a workpiece spindle; removing at least 50% of the allowance by means of gear skiving with a skiving wheel that is rotatably driven by a tool spindle; precision-machining the work wheel in unchanged tension by means of a honing wheel. The forward movement occurs during gear skiving in the extension direction of the toothing. The delivery of the workpiece that is moved in an oscillating manner in the extension direction of the toothing occurs during honing in the radial direction. The skiving wheel and the honing wheel are driven by a common tool spindle. A device for carrying out the method includes a workpiece spindle, which is driven to rotate, and a tool spindle, which carries a combination tool having a skiving wheel and a honing wheel.

1 .- 15 . (canceled) 
     
     
         16 . A device for carrying out a method for machining a work wheel being prepared in an unhardened state with teeth having an allowance; being hardened to a surface hardness of at least 45 HRC and having a hardness distortion error less than the allowance, comprising:
 a workpiece spindle that is configured to be driven to rotate, the workpiece spindle having a chuck for chucking the work wheel to be machined;   a tool spindle that is configured to be driven to rotate in synchronization with the workpiece spindle, the tool spindle holding a skiving wheel and a honing wheel; and   a programmed electronic control unit controlling a rotational movement of the tool spindle and that of the workpiece spindle, a feed motion and a forward movement;   wherein the control unit is equipped so that, after chucking said work wheel onto the workpiece spindle, at least 50% of the allowance is removable by gear skiving with the skiving wheel driven to rotate by the tool spindle, and then the work wheel is configured to be precision machined using the honing wheel driven to rotate by the tool spindle during the same chucking, and   wherein the forward movement in gear skiving takes place in a direction of extent of the gearing, and the feed motion of the work wheel oscillating in a direction of extent of the toothing takes place in the radial direction during honing,   wherein the skiving wheel and the honing wheel sit on the same tool spindle and are formed by a combination tool.   
     
     
         17 . The device according to  claim 16 , characterized by a dressing tool being located in the machine for dressing the honing wheel being carried by the tool spindle. 
     
     
         18 . A device according to  claim 16 , wherein the skiving wheel is a hard metal skiving wheel. 
     
     
         19 . A device according to  claim 16 , wherein the honing wheel is a ceramically bonded, in particular dressable, honing wheel. 
     
     
         20 . The device of  claim 16 , wherein the honing wheel is a CBN tool. 
     
     
         21 . A tool comprising a skiving wheel and a honing wheel being combined coaxially and axially, one after the other, to form a combination tool, which is configured to be driven to rotate by the same tool spindle. 
     
     
         22 . A tool according to  claim 21 , wherein the skiving wheel is a hard metal skiving wheel. 
     
     
         23 . A tool according to  claim 21 , wherein the honing wheel is a ceramically bonded, in particular dressable, honing wheel. 
     
     
         24 . The tool according to  claim 21 , wherein the honing wheel is a CBN tool.