Dressing, honing and grinding tool

Abstract

In a negative mould ( 1 ) closed by a lid ( 3 ), hard material abrasive grains ( 5 ) are nickel-attached to the peripheral inside surface. The negative mould ( 1 ) contains, in addition to the outside contour ( 4 ) of the tool to be manufactured, also the surfaces for the location bore ( 7 ) and the end face locations ( 7 ′) of the said tool. Subsequently the inner space of the negative mould ( 1 ) is completely filled with a casting mass ( 6 ) interspersed with solid particles ( 8 ) and the said mass allowed to harden. The mould ( 1 ) is removed by machining or etching. This process permits the inexpensive and economic manufacture of tools coated with hard material abrasive grains.

1 . Tool for grinding, honing or cut-off grinding, or for the dressing of grinding, honing or other fine machining tools, the tool comprising a location bore ( 7 ) and end face location surfaces ( 7 ′) for attaching to a tool spindle or a tool mandrel, wherein an entire tool body including the location bore ( 7 ) and the end face location surfaces ( 7 ′) is composed of a hardened cast mass ( 6 ), in which at least on a periphery ( 4 ) hard material abrasive grains ( 5 ) are embedded.  
     
     
         2 . Tool according to    claim 1   , wherein the cast mass ( 6 ) is composed of a mixture of synthetic resin or ceramic and of solid particles ( 8 ).  
     
     
         3 . Tool according to    claim 2   , wherein the solid particles ( 8 ) differ mutually in form and size.  
     
     
         4 . Tool according to    claim 2   , wherein the solid particles ( 8 ) are minerals.  
     
     
         5 . Tool according to    claim 1   , wherein the tool body is composed of a cast mass ( 6 ) of a composition varying from zone to zone.  
     
     
         6 . Tool according to    claim 1   , wherein the hard material abrasive grains on the periphery are additionally bonded by a galvanically or chemically produced metal layer ( 19 ).  
     
     
         7 . Tool according to    claim 4   , wherein the minerals are silicates or borates.  
     
     
         8 . Process for the manufacture of a tool for grinding, honing, cut-off grinding or for dressing fine machining tools by means of a negative mould ( 1 ), a peripheral inside contour ( 4 ) of which is a negative of a peripheral outside contour of the tool, wherein the negative mould ( 1 ) used for manufacturing the tool is closed with a lid ( 3 ), wherein a thus formed hollow space not only contains the peripheral outside contour of the tool ( 2 ), but also the contours of its location bore and end faces, and wherein to form a tool body the entire hollow space of the negative mould ( 1 ) is filled with a casting mass ( 6 ) which is subsequently hardened.  
     
     
         9 . Process according to    claim 8   , wherein the negative mould ( 1 ) rotates during pouring in of the casting mass ( 6 ).  
     
     
         10 . Process according to    claim 8   , wherein the negative mould ( 1 ) is centrifuged and/or vibrated and/or subjected to a vacuum after pouring in of the casting mass ( 6 ).  
     
     
         11 . Process according to    claim 8   , wherein the hard material abrasive grains ( 5 ) on a peripheral inside surface ( 4 ) of the negative mould ( 1 ) are bonded with a galvanically or chemically produced metal layer ( 19 ) prior to the pouring in of the casting mass ( 6 ).  
     
     
         12 . Process according to    claim 8   , wherein a composition of the casting mass ( 6 ) fed into the hollow space formed by the negative mould ( 1 ) and the lid ( 3 ) is varied according to a pouring time phase schedule.  
     
     
         13 . Process according to    claim 12   , wherein a casting mass mixed with hard material abrasive grains ( 5 ) is fed into the hollow space formed by the negative mould ( 1 ) and the lid ( 3 ) to form an outer zone of the tool.  
     
     
         14 . Process according to    claim 8   , wherein the location bore ( 7 ) and the end face location surfaces ( 7 ′) of the tool are trim machined by a fine machining operation after hardening of the casting mass.