Hard alloy reaming drill bit

Abstract

The invention discloses a hard alloy reamer bit which is formed by connecting a drill body and a drill handle. The hard alloy reamer bit is characterized in that an S-shaped cutter and a front cutter are arranged on the drill body; the drill handle is of a cylindrical structure; a locating groove is formed in the drill handle and close to the tail end of the drill handle. The front cutter, the S-shaped cutter and a chip removing groove are effectively combined, in work, the front cutter is in contact with a workpiece, then the S-shaped cutter conducts cutting, the drilling strength of the S-shaped cutter is reduced, the S-shaped cutter is protected, the service life of the drill bit is prolonged, the drilling efficiency is high, and the chip is smoothly removed.

Description

technical field [0001] The invention belongs to the field of drill bits, in particular to a cemented carbide reaming drill bit. Background technique [0002] A drill is a tool used to drill through holes or blind holes in solid materials and to ream existing holes. Commonly used drills mainly include twist drills, center drills, flat drills, deep hole drills and casing drills. Although countersinking drills and countersinks cannot drill holes in solid materials, they are also customarily classified as drill bits. During the working process of digging, the drill bit rotates with the vertical shaft and moves axially at the same time. The soil is cut under the torque and axial force of the drill bit, and loosened under the extrusion and centrifugal force of the working blades, forming a soil flow that is pressed to the pit wall and lifted to the surface along the page. When the soil flow moves to the place where there is no pit wall, the broken soil is thrown around the pit ...

AI Technical Summary

Problems solved by technology

The existing reaming drills have the problems of low hardness, poor wear resistance and short service life

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