Rough grinding tool

Abstract

A rough grinding tool has a support plate with a centre opening arranged concentrically with respect to a centre longitudinal axis for receiving a drive shaft of a drive machine. Supported on the support plate is a fiber grinding disc, which is formed from a fiber disc being used as a carrier and a resin-bound grinding means covering. The fiber grinding disc is glued to the support plate.

1 . A rough grinding tool comprising
 a support plate, which
 is concentrically configured with respect to a centre longitudinal axis and 
 has a centre opening for receiving a drive shaft of a drive machine, 
   and   a fiber grinding disc, which
 consists of a fiber disc, with a resin-bound grinding means covering, 
 has an outer annular grinding region arranged radially with respect to the centre longitudinal axis, 
 is supported on the support plate and 
 has a grinding side, 
   
       wherein the fiber grinding disc is glued to the support plate. 
     
     
         2 . A rough grinding tool according to  claim 1 ,
 wherein the fiber grinding disc is glued to the support plate by means of an adhesive layer.   
     
     
         3 . A rough grinding tool according to  claim 1 ,
 comprising ceramic grain as the grinding means.   
     
     
         4 . A rough grinding tool according to  claim 1 ,
 wherein the grinding region is convex toward the grinding side with a radius of curvature r 8 ′.   
     
     
         5 . A rough grinding tool according to  claim 1 ,
 wherein the grinding region has a main grinding region and an outer grinding region which adjoins radially outwardly with respect to the axis and which grinding region is convex toward the grinding side with a radius of curvature r 15 ′.   
     
     
         6 . A rough grinding tool according to  claim 5 ,
 wherein the grinding region is convex toward the grinding side with a radius of curvature r 8 ′ and   wherein with regard to the radius of curvature r 15 ′ in relation to the radius of curvature r 8 ′ there applies: r 15 ′<r 8 ′.   
     
     
         7 . A rough grinding tool according to  claim 4 ,
 wherein with regard to the radius of curvature r 8 ′ there applies:
   190 mm≦r8′≦300 mm.
 
   
     
     
         8 . A rough grinding tool according to  claim 5 ,
 wherein with regard to the radius of curvature r 15 ′ there applies:
   17 mm≦r15′≦40 mm.
 
   
     
     
         9 . A rough grinding tool according to  claim 1 ,
 wherein the grinding region has an inner radius R 6 ′ and an outer radius R 8 ′ and the fiber grinding disc has an outer radius R 9 ′ wherein there applies:
   0.45 R9′≦R6′≦0.7 R9′ and
 
   0.5 R9′≦R8′≦R9′.
 
   
     
     
         10 . A rough grinding tool according to  claim 1 ,
 wherein the support plate has an outwardly increasing resilience radially with respect to the axis.   
     
     
         11 . A rough grinding tool according to  claim 10 ,
 wherein the resilience increases step-wise radially outwardly.   
     
     
         12 . A rough grinding tool according to  claim 11 ,
 wherein the support plate has a plurality of annular portions, which in each case have a thickness h, h′, h″ outwardly decreasing radially with respect to the axis.   
     
     
         13 . A rough grinding tool according to  claim 1 ,
 wherein, the fiber disc consists of vulcanized fiber.   
     
     
         14 . A rough grinding tool according to  claim 7 ,
 wherein with regard to the radius of curvature r 8 ′ there applies:
   200 mm≦r8′≦250 mm.
 
   
     
     
         15 . A rough grinding tool according to  claim 8 ,
 wherein with regard to the radius of curvature r 15 ′ there applies:
   15 mm≦r15′≦20 mm.