Apparatus and method for securing diamond segment to rotating tool

Abstract

An apparatus for securing one or more diamond segments to a core bit of a diamond core drill includes a coupling ring to which one or more diamond segments are secured. An opposite end of the coupling ring is welded to a core bit. The coupling ring may be steel and may include a tapered portion or groove adjacent to an end of the core bit. An outer diameter formed by the diamond segments may be greater than an outer diameter of the core bit to reduce wear and an inner diameter formed by the diamond segments may be smaller than an inner diameter of the core bit to prevent a core of workpiece material from lodging in the core bit.

1 . An apparatus for securing diamond segments to a core bit of a diamond core drill, the apparatus comprising: 
 (a) a coupling ring concentric with the core bit and having a first side and a second side;    (b) at least one diamond segment secured on a circumference of said first side of said coupling ring; and    (c) a fastener joining said second side of said coupling ring to an end of the core bit.    
   
   
       2 . The apparatus according to  claim 1 , wherein said fastener joining said second side of said coupling ring to said end of the core bit further comprises a weld.  
   
   
       3 . The apparatus according to  claim 1 , wherein said end of the core bit comprises an end which has been cut to remove a damaged or worn diamond segment.  
   
   
       4 . The apparatus according to  claim 1 , wherein said second side of said coupling ring further comprises a tapered profile.  
   
   
       5 . The apparatus according to  claim 4 , wherein said tapered profile allows said coupling ring to be aligned with said end of the core bit.  
   
   
       6 . The apparatus according to  claim 1 , further comprising a groove disposed on a face of said second side of said coupling ring.  
   
   
       7 . The apparatus according to  claim 6 , wherein a width of said groove is approximately equal to or greater than a wall thickness of the core bit.  
   
   
       8 . The apparatus according to  claim 1  wherein an outer diameter formed by said diamond segments secured around a circumference of said first side of said coupling ring is greater than an outer diameter of the core bit.  
   
   
       9 . The apparatus according to  claim 1  wherein an inner diameter formed by said diamond segments secured around a circumference of said first side of said coupling ring is smaller than an inner diameter of the core bit.  
   
   
       10 . The apparatus according to  claim 1  wherein said coupling ring comprises a steel ring.  
   
   
       11 . A method for securing diamond segments to a core bit of a diamond core drill, the method comprising the steps of: 
 (a) securing at least one diamond segment to a circumference of a first side of a coupling ring; and    (b) joining a second side of said coupling ring to an end of a core bit of a diamond core drill.    
   
   
       12 . The method according to  claim 11 , further comprising the step of removing an end of the core bit which includes a damaged or worn diamond segment prior to joining said coupling ring to the core bit.  
   
   
       13 . The method according to  claim 11 , wherein said step of joining said second side of said coupling ring to said end of the core bit further comprises welding said second side of said coupling ring to said end of the core bit.  
   
   
       14 . A diamond segment for securing to a core bit or circular saw core comprising a-plurality of diamond particles disposed in a matrix and having a groove disposed on a face of the diamond segment adjacent to the core bit or circular saw core.  
   
   
       15 . The diamond segment according to  claim 14  wherein said groove has a width which is approximately equal to a width of the circular saw core or to wall thickness of the core bit.