Gear Cutting Machine

Abstract

The invention relates to a gear cutting machine for the grinding of external profiles and/or internal profiles of workpieces having at least one machining head which can be rotated about an axis and which has a grinding tool, and having a dressing unit. In accordance with the invention, the dressing unit is supported in the region of the pivot axis of the machining head such that it is pivotable about the common pivot axis together with the machining head and such that it can be moved along the pivot axis toward the grinding tool to be dressed.

1 . A gear cutting machine ( 1 ) for the grinding of external profiles and/or internal profiles of workpieces having at least one machining head ( 2 ,  7 ) which is rotatable about an axis (A) and which has a grinding tool ( 6 ,  8 ), and having a dressing unit ( 3 ), wherein
 the dressing unit ( 3 ) is supported in the region of the pivot axis (A) of the machining head ( 2 ,  7 ) such that it is pivotable about the common pivot axis (A) together with the machining head ( 2 ,  7 ); and in that it can be moved along the pivot axis (A) toward the grinding tool ( 6 ,  8 ) to be dressed.   
     
     
         2 . A gear cutting machine ( 1 ) in accordance with  claim 1 , wherein
 a swivel bearing is arranged in the machine stand ( 12 ) for the pivoting of the machining head ( 2 ,  7 ) with the grinding tool ( 6 ,  8 ); and the dressing unit is movable in the region of the center of rotation of this swivel bearing via an axial carriage along the pivot axis (A).   
     
     
         3 . A gear cutting machine ( 1 ) in accordance with  claim 2 , wherein
 the swivel bearing is arranged at the end of the machining head ( 2 ,  7 ) at the grinding disc side; and in that the dressing unit ( 3 ) is likewise arranged at the end of the machining head ( 2 ,  7 ) at the grinding disc side, whereby the dressing unit ( 3 ) and the grinding tool ( 6 ,  8 ) are pivotable about a common axis of rotation (A).   
     
     
         4 . A gear cutting machine ( 1 ) in accordance with  claim 1 , wherein
 the dressing unit ( 3 ) has at least one dressing wheel ( 4 ) which is movable in a direction (V 2 ) along the axis of rotation (B) of the grinding tool ( 6 ,  8 ).   
     
     
         5 . A gear cutting machine ( 1 ) in accordance with  claim 1 , wherein the grinding tool ( 6 ,  8 ) is movable along its axis of rotation (B). 
     
     
         6 . A gear cutting machine ( 1 ) in accordance with  claim 4 , wherein
 the at least one dressing wheel ( 4 ) can be moved in the direction (V 2 ) of the axis of rotation (B) of the grinding tool ( 6 ,  8 ) from the right and/or the left toward the surface of the grinding tool ( 6 ,  8 ).   
     
     
         7 . A gear cutting machine ( 1 ) In accordance with  claim 1 , wherein
 a controller is provided which permits an automatic control of the grinding process of external profiles and internal profiles as well as the dressing of the respective grinding tool ( 6 ,  8 ) used.   
     
     
         8 . A gear cutting machine ( 1 ) in accordance with  claim 7 , wherein
 the controller has corresponding software with only one program or program part for the dressing of a grinding tool ( 6 ,  8 ) for the grinding of an external profile or of an internal profile.   
     
     
         9 . A method in accordance with  claim 1 , having the following steps for the dressing of a grinding tool ( 6 ,  8 );
 Moving the dressing unit ( 3 ) in a linear direction (X 2 ) along the pivot axis (A) toward the grinding tool ( 6 ,  8 );   Moving the at least one dressing wheel ( 4 ) in the direction (V 2 ) along the axis of rotation (B) of the grinding tool ( 6 ,  8 ); and   Engaging the at least one dressing wheel ( 4 ) in each case from the right or the left at the surface of the grinding tool ( 6 ,  8 ),   wherein the movements in accordance with the steps a and b are controlled along the flank line of the grinding tool ( 6 ,  8 ) during the dressing.   
     
     
         10 . A method in accordance with  claim 9 , wherein
 the grinding tool ( 6 ,  8 ) is additionally moved along the axis of rotation (B) in the direction of at least one dressing wheel ( 4 ).   
     
     
         11 . A method in accordance with  claim 9 , wherein
 the dressing process is controlled by an NC controller.   
     
     
         12 . A method in accordance with  claim 9 , wherein
 the grinding tool ( 6 ,  8 ) is dressed continuously by the dressing unit ( 3 ) during the grinding process of the external profile of a workpiece.   
     
     
         13 . A method in accordance with  claim 9 , wherein
 the dressing process for the dressing of the grinding tool ( 6 ,  8 ) by the dressing unit ( 3 ) is carried out before or after a grinding process.   
     
     
         14 . A method in accordance with  claim 9 , wherein
 the grinding tool ( 8 ) is moved upwardly or downwardly out of the toothed arrangement for the further cycling into the next gap during the grinding of the internal profile and the dressing process is controlled such that the grinding tool is always dressed in the upper part position by the dressing unit ( 3 ).   
     
     
         15 . A method in accordance with  claim 9 , wherein
 the grinding tool ( 8 ) is dressed continuously by the dressing unit ( 3 ) during the grinding process of an internal profile.   
     
     
         16 . A gear cutting machine ( 1 ) in accordance with  claim 5 , wherein
 the at least one dressing wheel ( 4 ) can be moved in the direction (V 2 ) of the axis of rotation (B) of the grinding tool ( 6 ,  8 ) from the right and/or the left toward the surface of the grinding tool ( 6 ,  8 ).   
     
     
         17 . A method in accordance with  claim 10 , wherein
 the dressing process is controlled by an NC controller.   
     
     
         18 . A gear cutting machine ( 1 ) in accordance with  claim 2 , wherein
 the dressing unit ( 3 ) has at least one dressing wheel ( 4 ) which is movable in a direction (V 2 ) along the axis of rotation (B) of the grinding tool ( 6 ,  8 ).   
     
     
         19 . A gear cutting machine ( 1 ) in accordance with  claim 3 , wherein
 the dressing unit ( 3 ) has at least one dressing wheel ( 4 ) which is movable in a direction (V 2 ) along the axis of rotation (B) of the grinding tool ( 6 ,  8 ).   
     
     
         20 . A gear cutting machine ( 1 ) in accordance with  claim 19 , wherein the grinding tool ( 6 ,  8 ) is movable along its axis of rotation (B).