Reinforcing mesh for abrasive wheels and related abrasive wheel

Abstract

A reinforcing mesh for abrasive wheels including a fabric or nonwoven fabric made of fibres; and at least one recognition element made of conductive material adhering to the fibre fabric.

1 . A disk-shaped reinforcing mesh for abrasive wheels comprising:
 a disk-shaped fiber fabric or nonwoven fiber fabric made of fibres; and   at least one strip-shaped recognition element made of conductive material adhered to a face of the disk-shaped fibre fabric;   wherein the strip-shaped recognition element is an elongated strip of conductive material that has:
 a length along a longitudinal axis; 
 a width that is a first transverse dimension with respect to the longitudinal axis, wherein the length is greater than the width, and 
 a thickness that is a second transverse dimension with respect to the longitudinal axis, wherein the width is greater than the thickness; 
   wherein the strip-shaped recognition element comprises a face parallel to the longitudinal axis and to the width and adhered to a face of the disk-shaped fibre fabric; and   wherein the width is between 0.3 mm and 5 mm.   
     
     
         2 . The disk-shaped reinforcing mesh according to  claim 1 , wherein the strip-shaped recognition element has flexural strength lower than or equal to a flexural strength of the disk-shaped fibre fabric. 
     
     
         3 . The disk-shaped reinforcing mesh according to  claim 1 , wherein the conductive material is selected in the group of aluminium, iron, copper, zinc, titanium, lead, tin, nickel, tungsten, magnesium, lithium, chromium and carbon. 
     
     
         4 . The disk-shaped reinforcing mesh according to  claim 1 , comprising a sheet provided with a face adhering to a face of the disk shaped fibre fabric. 
     
     
         5 . The disk-shaped reinforcing mesh according to  claim 4 , wherein the strip-shaped recognition element is interposed between the face of the disk shaped fibre fabric and the face of the sheet. 
     
     
         6 . The disk-shaped reinforcing mesh according to  claim 4 , wherein the sheet is made of a polymeric material. 
     
     
         7 . The disk-shaped reinforcing mesh according to  claim 4 , wherein the sheet is made of a paper material. 
     
     
         8 . The disk-shaped reinforcing mesh according to  claim 1 , wherein the thickness of the strip-shaped recognition element is lower than or equal to a thickness of the disk shaped fibre fabric. 
     
     
         9 . The disk-shaped reinforcing mesh according to  claim 1 , wherein comprises a plurality of pores. 
     
     
         10 . The disk-shaped reinforcing mesh according to claim  10 , wherein each of the pores has a pore size comprised between 0.1 mm and 2.0 mm. 
     
     
         11 . The disk-shaped reinforcing mesh according to  claim 10 , wherein the pores have a pore density comprised between 1 pore per mm 2  and 1 pore per 5 mm 2 . 
     
     
         12 . The disk-shaped reinforcing mesh according to  claim 1 , wherein the strip-shaped recognition element is plastically deformable. 
     
     
         13 . An abrasive wheel comprising:
 an abrasive mix; and   at least one disk-shaped reinforcing mesh according to  claim 1 , wherein the at least one disk-shaped reinforcing mesh is at least partially incorporated within the abrasive mix and the strip-shaped recognition element occupies at least in width a limited portion of the overall width of the disk-shaped fiber fabric of the at least one disk-shaped reinforcing mesh and of the abrasive wheel to which it is associated.   
     
     
         14 . A process for manufacturing a disk-shaped reinforcing mesh comprising the steps of:
 producing a fiber fabric made of fibres; and   making a face of a strip-shaped recognition element made of conductive material adhere to a face of the fibre fabric,   wherein the strip-shaped recognition element is an elongated strip of conductive material that has:
 a length along a longitudinal axis; 
 a width that is a first transverse dimension with respect to the longitudinal axis, wherein the length is greater than the width, and 
 a thickness that is a second transverse dimension with respect to the longitudinal axis, wherein the width is greater than the thickness; and 
 wherein the width is between 0.3 mm and 5 mm; 
   the face of the strip-shaped recognition element adhered to the face of the fibre fabric being parallel to the longitudinal axis and to the width;   die-cutting the fibre fabric with the strip-shaped recognition element adhering thereto, such as to obtain a disk-shaped reinforcing mesh provided with at least one portion of the strip-shaped recognition element made of conductive material adhering thereto.   
     
     
         15 . A method for producing an abrasive wheel comprising the steps of:
 making a disk-shaped reinforcing mesh with the process according to claim  14 ; and   at least partially incorporating a portion of disk-shaped reinforcing mesh within an abrasive mix;   pressing the abrasive mix and the disk-shaped reinforcing mesh incorporated therein; and   heat treating the abrasive mix and the incorporated therein disk-shaped reinforcing mesh previously pressed.   
     
     
         16 . A procedure for checking abrasive wheels comprising the steps of:
 producing an abrasive wheel with the method according to claim  15 ; and   provide a sensor configured to detect selectively a strip-shaped recognition element fixed to a disk-shaped reinforcing mesh incorporated into the abrasive wheel;   determining the presence of the disk-shaped reinforcing mesh incorporated therein by means of the detection, by the sensor, of the strip-shaped recognition element adhering to the disk-shaped reinforcing mesh;   actuate a selector or a signaler that selects or signals the abrasive wheels which is found not to comply with the standard, when the number of the detected disk-shaped reinforcing mesh is different from a predetermined reference number.   
     
     
         17 . The procedure according to  claim 16 , wherein the sensor is selected in the group consisting of an inductive sensor, a thermal camera, an X-ray sensor, a probe with feeler needle and combination thereof. 
     
     
         18 . A checking station for checking abrasive wheels produced with the method according to  claim 15 , comprising:
 a sensor configured to detect selectively a strip-shaped recognition element fixed to a disk-shaped reinforcing mesh incorporated into the abrasive wheel;   an electronic control unit operatively connected to the sensor, wherein the electronic control unit is configured to carrying out a procedure for checking abrasive wheels comprising the steps of:   determining the presence of the disk-shaped reinforcing mesh incorporated into the abrasive wheel by means of the detection, by the sensor, of the strip-shaped recognition element adhering to the disk-shaped reinforcing mesh;   actuate a selector or a signaler that selects or signals the abrasive wheels which is found not to comply with the standard, when the number of the detected disk-shaped reinforcing mesh is different from a predetermined reference number.   
     
     
         19 . The checking station according to  claim 18 , wherein the sensor is arranged with an axis of detection orthogonal to one of a front face and a rear face of the abrasive wheel and in eccentric position thereof.