Method for making drill-chuck jaw with hard-metal inserts

Abstract

A drill-chuck jaw is made by first forming an elongated metal body with a toothed back face and a planar front face and thereafter laser-welding an insert to the body on the face. After machining the body but before laser-welding the inserts to it, the body is heat-treated and surface hardened. After the heat-treating and surface-hardening step and before the laser-welding step, the body in tampered.

I claim:  
     
         1 . A method of making a drill-chuck jaw comprising the steps of sequentially; 
 forming an elongated metal body with a toothed back face and a planar front face; and    laser-welding an insert to the body on the face.    
     
     
         2 . A method of making a drill-chuck jaw comprising the steps of sequentially: 
 forming an elongated metal body with a toothed back face and a planar front face;    heat-treating and surface hardening the body; and    laser-welding an insert to the body on the face.    
     
     
         3 . The jaw-making method defined in  claim 2 , further comprising after the heat-treating and surface-hardening step and before the laser-welding step the step of 
 tampering the body.    
     
     
         4 . The jaw-making method defined in  claim 2 , further comprising before the heat-treating and surface-hardening step the steps of 
 forming a longitudinally extending centering formation on the face, and thereafter but before the laser-welding step;    fitting the insert to the formation.