Rock bit tip and rock bit

Abstract

A rock bit tip includes a mounting portion, an end portion converging from a top end of the mounting portion to form a work surface and at least one recess in a bottom of the mounting portion, the recess extending towards the end portion. Particularly, there are more than one recess. The disclosure further relates to a rock bit.

1 . A rock bit tip comprising:
 a mounting portion;   an end portion converging from a top end of the mounting portion to form a work surface; and   at least one recess in a bottom of the mounting portion, the recess extending towards said end portion, wherein there are a plurality of recesses.   
     
     
         2 . The tip as set forth in  claim 1 , wherein the plurality of recesses are spaced apart by a support structure, the support structure being integral with the mounting portion and the end portion. 
     
     
         3 . The tip as set forth in  claim 1 , wherein at least one recess has a cross section, parallel to the bottom of the mounting portion between a bottom of the mounting portion and the end portion, at least one recess having a geometrical centre separate from a longitudinal tip centre axis. 
     
     
         4 . The tip as set forth in  claim 1 , wherein at least one recess has a cross section, parallel to the bottom of the mounting portion, at the bottom of the mounting portion, that is a circle sector. 
     
     
         5 . The tip as set forth in  claim 1 , wherein at least one recess has a cross section, parallel to the bottom of the mounting portion, at the bottom of the mounting portion, that is a truncated circle ring. 
     
     
         6 . The tip as set forth in  claim 1 , wherein at least one recess has a cross section, parallel to the bottom of the mounting portion, at the bottom of the mounting portion, that is hexagonal. 
     
     
         7 . The tip as set forth in  claim 1 , wherein at least one recess has a cross section, parallel to the bottom of the mounting portion, at the bottom of the mounting portion, that is circular. 
     
     
         8 . The tip as set forth in  claim 1 , wherein the tip comprises cemented carbide and/or polycrystalline diamond (PCD). 
     
     
         9 . The tip as set forth in  claim 8 , wherein the tip comprises tungsten carbide. 
     
     
         10 . A rock bit comprising a tip having a mounting portion, an end portion converging from a top end of the mounting portion to form a work surface, and at least one recess in a bottom of the mounting portion, the recess extending towards said end portion, wherein there are a plurality of recesses. 
     
     
         11 . The rock bit as set forth in  claim 10 , wherein the rock bit is selected from the group of a bit for rotary drilling, a bit for percussive drilling or a mining pick.