Apparatus and method for grinding rotary blades
The present disclosure relates to apparatus for grinding rotary blades, in particular scythe-like blades or circular blades, in particular for machines for slicing food products. The apparatus includes at least one mount for a rotary blade to which the rotary blade can be attached and at least one grinding tool. The grinding tool and the rotary blade attached in the mount are movable relative to one another such that a blade edge extending at the periphery of the rotary blade can be ground by the grinding tool. The apparatus includes a measuring device for determining the extent of the blade edge and a control which is designed to use the determined blade edge extent for controlling the relative movement between the grinding tool and the rotary blade.
1. An apparatus ( 1 ) for grinding rotary blades ( 3 ) comprising:
at least one mount ( 5 ) for a rotary blade ( 3 ) to which the rotary blade ( 3 ) can be attached;
at least one grinding tool ( 9 ) having a grinding wheel ( 29 ) and a deburring wheel ( 31 ),
wherein the grinding tool ( 9 ) and the rotary blade ( 3 ) attached in the mount ( 5 ) are movable relative to one another such that a blade edge ( 11 ) extending at the periphery of the rotary blade ( 3 ) can be ground by the grinding tool ( 9 );
and a pivoting device ( 33 ) for the grinding tool ( 9 ),
wherein the pivoting device ( 33 ) is designed so that the grinding tool ( 9 ) is pivotable about a pivot axis ( 45 ) which extends through a grinding point ( 27 ) at which the blade edge ( 11 ) and the grinding tool ( 9 ) contact one another during the grinding process,
wherein the pivoting device ( 33 ) has at least one pivot bearing ( 35 ) and an axis of rotation ( 47 ) of the pivot bearing ( 35 ) coincides with the pivot axis ( 45 ) of the grinding tool ( 9 ), and
wherein the grinding wheel ( 29 ) and the deburring wheel ( 31 ) are each attached to a pivot arm ( 37 , 39 ), with both pivot arms ( 37 , 39 ) being attached to the pivot bearing ( 35 ) and being rotatable about the common axis of rotation ( 47 ) of the pivot bearing ( 35 ) for the common pivoting of the grinding wheel ( 29 ) and of the deburring wheel ( 31 ).
2. An apparatus in accordance with claim 1 , wherein the grinding wheel ( 29 ) contacts the blade edge ( 11 ) at the grinding point ( 27 ) and is pivotable about the pivot axis ( 45 ).
3. An apparatus in accordance with claim 2 , wherein the deburring wheel ( 31 ) forms at least approximately a V-shaped mount for the rotary blade ( 3 ) together with the grinding wheel ( 29 ) and contacts the blade edge ( 11 ) at a deburring point ( 53 ), with the deburring wheel ( 31 ) being pivotable about the pivot axis ( 45 ) together with the grinding wheel ( 29 ) and/or independently of the grinding wheel ( 31 ).
4. An apparatus in accordance with claim 3 , wherein the deburring point ( 53 ) extends through the pivot axis ( 45 ).
5. An apparatus in accordance with claim 3 , wherein the grinding wheel ( 29 ) and the deburring wheel ( 31 ) are arranged offset from one another along the pivot axis ( 45 ).
6. An apparatus in accordance with claim 5 , wherein the grinding wheel ( 29 ) and the deburring wheel ( 31 ) are arranged offset from one another along the pivot axis ( 45 ) such that the grinding wheel ( 29 ) and the deburring wheel ( 31 ) are directly opposite one another with respect to the pivot axis ( 45 ).
7. An apparatus in accordance with claim 1 , wherein the rotary blade ( 3 ) and the grinding tool ( 9 ) can be positioned relative to one another such that the pivot axis ( 45 ) is aligned at least approximately tangentially to a cutting edge ( 23 ) of the rotary blade ( 3 ) present at the respective grinding point ( 27 ).
8. An apparatus in accordance with claim 1 , wherein each pivot arm ( 37 , 39 ) is rotatable about the common axis of rotation ( 47 ) of the pivot bearing ( 35 ) independently of the respective other pivot arm ( 37 , 39 ) for pivoting the grinding wheel ( 29 ) or deburring wheel ( 31 ) independently of the respective other wheel ( 29 , 31 ).
9. An apparatus in accordance with claim 8 , wherein the grinding wheel ( 29 ) and the deburring wheel ( 29 ) have a common pivot drive ( 49 ).