초록 ▼

The present invention relates to an abrasive tool, of the type suitable to be mounted on a machine tool, comprising at least a bearing structure with abrasive material, the said bearing structure being provided with at least a grid (6) with abrasive material, the grid (6) partially protruding or eme

The present invention relates to an abrasive tool, of the type suitable to be mounted on a machine tool, comprising at least a bearing structure with abrasive material, the said bearing structure being provided with at least a grid (6) with abrasive material, the grid (6) partially protruding or emerging from a body (7) without abrasive material.

대표청구항 ▼

1. Abrasive tool of the type suitable to be mounted on a tool machine, comprising at least a bearing structure with abrasive material, said bearing structure comprising an elastic body (7) without abrasive material, characterised in that the said bearing structure further comprises at least an elast

1. Abrasive tool of the type suitable to be mounted on a tool machine, comprising at least a bearing structure with abrasive material, said bearing structure comprising an elastic body (7) without abrasive material, characterised in that the said bearing structure further comprises at least an elastic grid (6) associated to said elastic body (7) so that at least part of the grid (6) protrudes or emerges from the body (7), wherein said grid (6) is made of an electrically conductive material, so that the abrasive material can be fixed to the grid (6) by means of a galvanic bath. 2. Abrasive tool as claimed in claim 1, characterised in that the body (7) is made of non conductive material so that the abrasive material cannot be fixed to the grid (6) by means of a galvanic bath. 3. Abrasive tool as claimed in claim 1 characterised in that said elastic grid (6) is made of a material more rigid than the material of the elastic body (7). 4. Abrasive tool as claimed in claim 1, characterised in that said body (7) is made of plastic, silicone, or polymeric material such as polyurethanic polymers. 5. Abrasive tool as claimed in claim 1, characterised in that said grid (6) is made of metals such a steel or harmonic steel. 6. Abrasive tool as claimed claim 5, characterised in that the thickness of the grid (6) ranges from 1 to 10 mm. 7. Abrasive tool as claimed in claim 1, characterised in that the bearing structure of the tool comprises a rear side (2) without abrasive designed to be mounted facing the machine tool, and a machining side (4) designed to be mounted towards the machined piece and in which the grid (6) is partially built into the body (7) and partially protrudes or emerges towards the machining side (4); wherein the machining side (4) is convex, with concavity on the rear side (2). 8. Abrasive tool as claimed in claim 1 characterised in that the bearing structure also comprises a flange (5) for coupling the bearing structure with a machine tool, such as a grinding machine, etc. 9. Abrasive tool as claimed in claim 8, characterised in that the grid (6) has a spiral shape that starts from a perforated central coupling element (8) designed to be coupled with the flange (5) by interference and broadens outwardly. 10. Abrasive tool as claimed in claim 9, characterised in that the spiral is provided with transversal support arms (9) that depart from the perforated central coupling element (8). 11. Manufacturing process of an abrasive tool which provides for: a. a construction of an elastic grid (6) made of electrically conductive material,b. association of said elastic grid (6) to an elastic body (7) so that at least part of the grid (6) protrudes or emerges from the body (7),c. immersion of the body (7) and the grid (6) in a galvanic bath in which a powder or granule abrasive element is dispersed, making the material or powder abrasive element adhere to the grid (6). 12. Process as claimed in claim 11, characterised in that said flexible grid (6) is obtained by means of moulding or shearing or laser cutting starting from a sheet metal. 13. Process as claimed in claim 11, characterised in that it comprises the steps of: positioning the grid (6) in a mould for plastic materials, andco-moulding of a polymeric on the grid (6) so that to form said flexible body (7), allowing at least part of the grid (6) to protrude or emerge from the body (7). 14. Process as claimed in claim 11, characterised in that it provides for coupling the grid (6) to a flange (5) by means of interference.