Attachment systems and methods for abrasive discs

Abstract

A dual sided abrasive article is presented that includes a first side with a first abrading face and a second side, with a second abrading face. The second side is opposite the first side and separated by a thickness. The article also includes a center hole extending from the first side to the second side through the thickness. The article also includes a fastener for coupling the abrasive article to a powered tool, the fastener positioned within the center hole.

1 . A dual sided abrasive article comprising:
 a first side comprising a first abrading face;   a second side, comprising a second abrading face, wherein the second side is opposite the first side and separated by a thickness;   a center hole extending from the first side to the second side through the thickness; and   a fastener for coupling the abrasive article to a powered tool, the fastener positioned within the center hole.   
     
     
         2 . (canceled) 
     
     
         3 . The dual sided abrasive article of  claim 1 , wherein the first abrading face and the second abrading face comprise abrasive grains of different grades. 
     
     
         4 . (canceled) 
     
     
         5 . The dual sided abrasive article of  claim 1 , wherein the fastener is spun weld within the center hole, and wherein a portion of the abrasive article or a portion of the fastener is melted. 
     
     
         6 . The dual sided abrasive article of  claim 1 , wherein the fastener comprises a thermoplastic or metal. 
     
     
         7 . The dual sided abrasive article of  claim 1 , wherein the fastener is coupled to the center hole using an adhesive. 
     
     
         8 . The dual sided abrasive article of  claim 7 , wherein the adhesive is a thermally activated adhesive. 
     
     
         9 . The dual sided abrasive article of  claim 1 , wherein the fastener is ultrasonically welded into the center hole. 
     
     
         10 . The dual sided abrasive article of  claim 1 , wherein the fastener comprises internal threading configured to receive an attachment mechanism for coupling to a powered tool. 
     
     
         11 . The dual sided abrasive article of  claim 1 , wherein the fastener is coupled to the abrasive article only along an interior surface of center hole. 
     
     
         12 . The dual sided abrasive article of  claim 1 , wherein a fastener thickness is smaller than the thickness. 
     
     
         13 . The dual sided abrasive article of  claim 1 , wherein a fastener thickness is substantially the same as the thickness. 
     
     
         14 . The dual sided abrasive article of  claim 1 , wherein a fastener thickness is larger than the thickness. 
     
     
         15 . A method of making a dual sided abrasive disc, the method comprising:
 providing an abrasive disc with a first abrading face and a second abrading face separated by a thickness, wherein the abrasive disc comprises an aperture in a center of the abrasive disc extending from the first abrading face to the second abrading face;   providing a fastener with a diameter substantially similar to an aperture diameter, wherein providing comprises placing the fastener within the aperture;   spin welding the fastener into place; and   wherein the fastener is bonded to the abrasive disc only within the aperture such that no bond is present between the fastener and either of the first or second abrading faces.   
     
     
         16 . The method of  claim 15 , wherein spin welding causes the fastener or the abrasive article to at least partially melt. 
     
     
         17 . The method of  claim 15 , and further comprising applying an adhesive between the fastener and the abrasive disc. 
     
     
         18 . An attachment mechanism for coupling an abrasive article to a backup pad, the attachment mechanism comprising:
 a first side configured to couple to the backup pad;   a second side configured to couple to the abrasive article;   wherein the attachment mechanism is a toolless attachment system, such that the abrasive disc is removeable without additional tooling.   
     
     
         19 . The attachment mechanism of  claim 18 , wherein the first side comprises male threading, and wherein the first side is configured to couple to the backup pad using the male threading. 
     
     
         20 . The attachment mechanism of  claim 19 , wherein the second side comprises male threading, and wherein the second side is configured to couple to a fastener within an abrasive disc using the male threading. 
     
     
         21 . The attachment mechanism of  claim 20 , and further comprising a first locking mechanism present on the first side, wherein the first locking mechanism engages when the first side male threading is fully engaged to female threading within the backup pad. 
     
     
         22 . The attachment mechanism of  claim 18 , wherein the first side has a first indication, the second side has a second indication, and wherein the first and second indications are different. 
     
     
         23 - 36 . (canceled)