Device and method for truing a machining wheel by means of a rotating truing tool as well as machine tool with a device of this kind

Abstract

The invention relates to a device ( 10 ) for truing a machining wheel ( 20 ), in particular grinding or eroding wheel, by means of a rotating truing tool ( 30 ), comprising: a first rotating spindle ( 18 ), which can be driven so as to rotate about a first axis of rotation ( 22 ), for attaching the machining wheel ( 20 ) and a second rotating spindle ( 28 ), which can be driven so as to rotate about a second axis of rotation ( 32 ), for attaching the truing tool ( 30 ), wherein, in order to true the machining wheel ( 20 ), the truing tool ( 30 ) rotatably driven by the second rotating spindle ( 28 ) can be brought into material-removing contact with the machining wheel ( 20 ) rotatably driven by the first rotating spindle ( 18 ). In this respect, in order to obtain uniform truing results, the first axis of rotation ( 22 ) is directed substantially orthogonally to the second axis of rotation ( 32 ) during the entire truing process.

1 . Device ( 10 ) for truing a machining wheel ( 20 ) by means of a rotating truing tool ( 30 ), comprising:
 a first rotating spindle ( 18 ), which can be driven so as to rotate about a first axis of rotation ( 22 ), for attaching the machining wheel ( 20 ) and   a second rotating spindle ( 28 ), which can be driven so as to rotate about a second axis of rotation ( 32 ), for attaching the truing tool ( 30 ),   wherein, in order to true the machining wheel ( 20 ), the truing tool ( 30 ) rotatably driven by the second rotating spindle ( 28 ) can be brought into material-removing contact with the machining wheel ( 20 ) rotatably driven by the first rotating spindle ( 18 ),   characterised in that the first and the second axis of rotation do not intersect during the entire truing process, and that the first axis of rotation ( 22 ) is oriented substantially orthogonally to the second axis of rotation ( 32 ) during the entire truing process such that the truing tool wears uniformly over its entire circumference during the entire truing process.   
   
   
       2 . Device ( 10 ) according to  claim 1 ,
 characterised in that the second rotating spindle ( 28 ) can be displaced relative to the first rotating spindle ( 18 ) during truing, wherein the second axis of rotation ( 32 ) associated with the second rotating spindle ( 28 ) can be moved along a path ( 34 ) extending parallel to a desired profile of the machining wheel ( 20 ).   
   
   
       3 . Device ( 10 ) according to  claim 2 ,
 characterised in that the truing tool ( 30 ) can be moved along a linear path extending parallel to the second axis of rotation ( 32 ) in order to true the machining wheel ( 20 ).   
   
   
       4 . Device ( 10 ) according to  claim 3 ,
 characterised in that the truing tool ( 30 ) acts with a circumferential surface on a circumferential surface ( 40 ) of the machining wheel ( 20 ).   
   
   
       5 . Device ( 10 ) according to  claim 2 ,
 characterised in that, in order to true the machining wheel ( 30 ), the truing tool ( 30 ) can be moved along a curved path ( 34 ) which extends parallel in direction to a curved contour ( 42 ) to be trued of the machining wheel ( 30 ).   
   
   
       6 . Device ( 10 ) according to  claim 1 ,
 characterised in that the second rotating spindle ( 28 ) can be approached to the first rotating spindle ( 18 ) in order to compensate for material removal at the machining wheel ( 20 ) or/and at the truing tool ( 30 ) caused by the truing, wherein the spacing of the first and second axis of rotation ( 22 ,  32 ) decreases.   
   
   
       7 . Device according to  claim 1 ,
 characterised in that the machining wheel is a grinding or an eroding wheel.   
   
   
       8 . Method for truing a machining wheel by means of a rotating truing tool, with a device according to  claim 1 , wherein, in order to true the machining wheel, the truing tool rotatably driven by the second rotating spindle is brought into material-removing contact with the machining wheel rotatably driven by the first rotating spindie, wherein the first and the second axis of rotation do not intersect during truing and the first axis of rotation is maintained substantially orthogonal to the second axis of rotation during the entire truing process such that the truing tool wears uniformly over its entire circumference during the entire truing process. 
   
   
       9 . Method according to  claim 8 ,
 characterised in that the second rotating spindle is displaced relative to the first rotating spindle during truing such that the second axis of rotation associated with the second rotating spindle is moved along a path extending parallel to a desired profile of the machining wheel.   
   
   
       10 . Method according to  claim 9 ,
 characterised in that the truing tool is moved along a linear path extending parallel to the second axis of rotation in order to true the machining wheel.   
   
   
       11 . Method according to  claim 9 ,
 characterised in that, in order to true the machining wheel, the truing tool is moved relative to the machining wheel along a curved path which extends parallel in direction to a curved contour to be trued of the machining wheel.   
   
   
       12 . Method according to  claims 8 ,
 characterised in that the second rotating spindle is approached to the first rotating spindle in order to compensate for material removal at the machining wheel or/and at the truing tool caused by the truing, wherein the spacing of the first and second axis of rotation decreases.   
   
   
       13 . Machine tool, in particular grinding or/and eroding machine, with a device ( 10 ) according to  claim 1 , wherein the first axis of rotation ( 22 ) is formed by a machining spindle holding the machining wheel ( 20 ), and wherein the second rotating spindle ( 28 ) is formed by a truing spindle which can be displaced relative to this.