Method of generation of face enveloping gears

Abstract

Face enveloping gears are machined by face milling type cutting tool or gear shaper. This process includes the following steps: positioning of the cutting tool in tangential relation relative to the meshing enveloping pinion thread with face gear by the smallest pitch diameter of threads with face gear teeth; turning rotating cutter relative to axis of rotation of an imaginary enveloping wheel until generating tooth is on the outer circle of the face gear. For generation of enveloping pinion the complementary cutting tool has additional motion around axis of pinion rotation. In another method tooth shaper or helical hob rotating tool rotates around axis of rotation of a theoretical generating gear for enveloping pinion with a predetermined relative motion to axis of rotation of work gear. This reduces production cost and makes manufacturing easier.

1 . Method of generation of face enveloping gears having an enveloping pinion in a mesh engagement with a face gear where said face gear is machined by rotating cutter having generating elements rotating about axis of respective cutter-head comprising: 
 positioning of said cutter in tangential relation relative to the meshing of said enveloping worm thread with said face gear teeth;    turning of said rotating cutter relative to axis of rotation of imaginary enveloping wheel.    
   
   
       2 . Method of generation of face enveloping gears as recited in  claim 1 , where said cutter is positioned by the smallest pitch diameter of threads and turning is until generating tooth is on the outer circle of the face gear.  
   
   
       3 . Method of generation of face enveloping gears having an enveloping pinion in a mesh engagement with a face gear where said enveloping pinion is machined by rotating cutter having generating elements rotating about axis of respective cutter-head comprising: 
 positioning of said cutter in tangential relation relative to the meshing of said enveloping worm thread with said face gear teeth;    turning of said rotating cutter relative to axis of rotation of imaginary enveloping wheel and relative to said enveloping pinion around axis of rotation of enveloping pinion.    
   
   
       4 . Method of generation of face enveloping gears as recited in  claim 3  where positioning of said cutter is by the smallest pitch diameter of threads and turning is until generating thread with the biggest pitch diameter.  
   
   
       5 . Method of generation of face enveloping gears having an enveloping pinion in a mesh engagement with a face gear where said face gear is being machined by rotating tool, said rotating tool operatively engaging with a work gear and rotating around an axis of rotation of a theoretical generating gear for enveloping pinion with a predetermined relative motion to said work gear.  
   
   
       6 . Method of generation according with  claim 5  where said rotating tool having tooth surfaces represented by stock removing surfaces of said generating gear.  
   
   
       7 . Method of generation according with  claim 5  where said rotating tool having tooth surfaces thinner than width of said enveloping pinion thread in mesh.  
   
   
       8 . Method of generation according with  claim 5  where said rotating tool is operatively engaging with said work gear in location that is suitable for meshing with said enveloping pinion.  
   
   
       9 . Method of generation according with  claim 5  where said rotating tool has cutting blades.  
   
   
       10 . Method of generation according with  claim 5  where said rotating tool is a tooth shaper.  
   
   
       11 . Method of generation according with  claim 5  where said rotating tool is a helical hob.  
   
   
       12 . Method of generation according with  claim 5  where said rotating tool is a helical roll die shaper.  
   
   
       13 . Method of generation according with  claim 5  where said rotating tool is an abrasive tooth shaper.  
   
   
       14 . Method of generation according with  claim 5  where the predetermined relative motion of said rotating tool is done by equaling angular velocity of said work gear to the angular velocity of said rotating tool.  
   
   
       15 . Method of generation according with  claim 5  where the predetermined relative motion of said rotating tool is done by equaling angular velocity of said of rotating tool to the angular velocity of said rotating tool around axis of rotation of said work gear.  
   
   
       16 . Method of generation according with  claim 5  where the axis of rotation of said rotating tool is united to axis of rotation of a theoretical generating gear for enveloping pinion.  
   
   
       17 . Method of generation according with  claim 5  where the axis of rotation of said rotating tool is parallel to axis of rotation of a theoretical generating gear for enveloping pinion.  
   
   
       18 . Method of generation according with  claim 5  where the axis of rotation of rotating tool is crossing the axis of rotation of a theoretical generating gear for enveloping pinion.  
   
   
       19 . Method of generation according with  claim 5  where said rotating tool substantially simultaneously with said rotation motion, varies the orientation of said tooth surfaces with respect to the body of said theoretical generating gear.  
   
   
       20 . Method of generation according with  claim 19  where varying the orientation of said tooth surfaces of said rotating tool is around axis of rotation of said enveloping pinion.  
   
   
       21 . Method of generation according with  claim 19  where varying the orientation of said tooth surfaces of said rotating tool is around axis of rotation of said work gear.