Method of making a drill blank
OwnerKlaus Tankinventor
Life of this patent
Estimating the term…
Abstract
A method of making a drill blank which is elongate and which has a vein of a bonding material located in an end surface thereof. A recess is formed in a surface of a cemented carbide body. Either a layer of ultra-hard abrasive or a mass of ultra-hard abrasive particles is then placed on a surface of the recess. A cemented carbide piece, having the same shape and cross-sectional size as the recess, is inserted into the recess. The cemented carbide body is subjected to conditions of elevated temperature and pressure so that either the abrasive compact layer or the layer of the ultra-hard abrasive bonds the cemented carbide piece to the cemented carbide body. Finally, the cemented carbide body is severed through either the abrasive compact layer or layer of ultra-hard abrasive to produce one or more drill blanks.
Claims36
A method of making a drill blank, said method comprising the steps of:
- (i) providing a cemented carbide body having a recess formed in a surface thereof, wherein said recess has a shape and a cross-sectional size;
- (ii) placing a layer of ultra-hard abrasive on a surface of said recess;
- (iii) inserting a cemented carbide piece into said recess, said cemented carbide piece having a shape and a cross-sectional size approximately equal to said shape and said cross-sectional size of said recess;
- (iv) subjecting said cemented carbide body to conditions of elevated temperature and pressure such that said layer of said ultra-hard abrasive is bonded to said cemented carbide body;
- and
- (v) severing said cemented carbide body through said layer of said ultra-hard abrasive to produce at least one drill blank.
A method of making a drill blank, said method comprising the steps of
- (i) providing a cemented carbide body having a recess formed in a surface thereof, wherein said recess has a shape and a cross-sectional size;
- (ii) placing a mass of ultra-hard abrasive particles on a surface of said recess;
- (iii) inserting a cemented carbide piece into said recess, said cemented carbide piece having a shape and a cross-sectional size approximately equal to said shape and said cross-sectional size of said recess;
- (iv) subjecting said cemented carbide body to conditions of elevated temperature and pressure such that an abrasive compact is formed and is bonded to said cemented carbide body;
- and
- (v) severing said cemented carbide body through said abrasive compact to produce at least one drill blank.
Dependencies are inferred from the claim text.