Device for grinding saw teeth and a corresponding method

1. A device ( 1 ) for grinding a plurality of hard metal-tipped teeth ( 2 ) of each of a plurality of saw bands ( 3 ), the device having a feed device ( 4 ) for feeding a temporary workpiece ( 5 ) in a timed manner, wherein the temporary workpiece ( 5 ) is formed from the plurality of saw bands ( 3 ), which are parallel to one another, wherein the device ( 1 ) for grinding has spacers ( 16 ), wherein the spacers ( 16 ) are inserted between two adjacent saw bands ( 3 ) of the temporary workpiece ( 5 ), the device ( 1 ) for grinding further having a clamping device ( 6 ), wherein the clamping device ( 6 ) clamps the plurality of saw bands ( 3 ) towards one another and against the spacers ( 16 ), the device ( 1 ) for grinding further having a grinding unit ( 7 ) for simultaneously grinding a plurality of teeth ( 2 ), wherein the grinding unit ( 7 ) has a grinding wheel ( 8 ) comprising a plurality of grinding profiles ( 9 ).

2. The device ( 1 ) according to claim 1 , characterized in that the grinding wheel ( 8 ) is embodied as a roller ( 10 ), wherein the plurality of grinding profiles ( 9 ) has at least one tooth face grinding profile ( 11 ) and at least one tooth back grinding profile ( 12 ).

3. The device ( 1 ) according to claim 1 or 2 , characterized in that the device ( 1 ) has a pushdown unit ( 13 ) or a timing unit ( 14 ) or a cutting unit.

4. The device ( 1 ) according to one of the preceding claims, characterized in that the spacers ( 16 ) are band-shaped spacers ( 16 ) or segment-shaped spacers ( 16 ), wherein the spacers ( 16 ) are arranged in the clamping device ( 6 ) in a stationary manner.

5. The device ( 1 ) according to claim 1 , characterized in that the device ( 1 ) combines between 2 and 80 metal bands, to form the temporary workpiece ( 5 ).

6. The device ( 1 ) according to claim 1 , characterized in that the device ( 1 ) has a pushdown unit ( 13 ) and a timing unit ( 14 ) and a cutting unit.

7. A method for grinding hard metal-tipped teeth of saw bands, having the steps of:

clamping a plurality of parallel saw bands, which are aligned axially to one another, wherein the axes of each of the plurality of saw bands are aligned in the same direction, wherein spacers are inserted between two adjacent saw bands to create a temporary workpiece,

simultaneously grinding the temporary workpiece at a plurality of locations, which are axially spaced apart,

further transporting the processed temporary workpiece and reclamping the temporary workpiece to create a new temporary workpiece.

8. The method according to claim 7 further having one or a plurality of the following steps:

pre-milling of raw teeth in desired areas of the metal band,

unrolling a plurality of metal bands, each comprising pre-milled raw teeth and welded-on hard metal pins from a coil,

rotating and aligning the respective metal bands,

inserting spacers between two adjacent metal bands,

pushing down the temporary workpiece before the clamping,

rolling up at least one of the processed metal bands to form a coil each or cutting the processed metal bands.