47 results about "Drill bit shank" patented technology

The invention discloses a method of V-shaped welding of a solid carbide drill and the solid carbide drill of the method. The V-shaped welding method comprises the following steps of: selecting corresponding hard alloy bar stocks; determining the lengths of a drill blade part and a drill handle part; carrying out centreless grinding to alloy bar stocks of the drill blade part; cutting the drill blade parts and V-shaped welding parts on the alloy bar stocks by a wire cutting machine; milling a stress relief groove; carrying out heat treatment to the drill handle part, wherein the hardness is 50HRC (rockwell hardness C); carrying out pre-heating to the drill blade part; clamping the drill handle part at the bottom of a special welding fixture by the special welding fixture, and carrying out high-frequency heating; and carrying out heat preservation to the welded solid carbide drill. The structure of the solid carbide drill is as follows: a V-shaped welding part, which is a V-shaped groove, is arranged at the drill handle part, the V-shaped angle is 120 degrees, and the top of the V-shaped angle is the stress relief groove. The method of the V-shaped welding of the solid carbide drill has the following advantages that: the material cost of cutting tools is reduced, and the integral performance is improved. The solid carbide drill is widely applied, so that a large quantity of resources can be saved, and great economic and social benefits can be obtained.