Drill bit

Abstract

The invention provides a drill bit which comprises a rod body and a drill bit body arranged at one end of the rod body. The drill bit body comprises a drill bit portion and a connecting portion arranged at the other end of the drill bit portion. A threaded portion is arranged on the surface of the connecting portion and connected with the rod body. Compared with the prior art, the drill bit has the advantages that when the drill bit needs to be replaced repeatedly so as to meet the assembling needs, the drill bit body instead of the whole drill bit can be replaced, abrasion of the joint of the drill bit body and a perforating machine is lowered, an operator does not need to purchase multiple drill bits to meet different assembling needs, operation is easier and more convenient, the cost is saved, the working efficiency is improved, and the service life of the perforating machine is prolonged.

Description

technical field [0001] The invention relates to the field of construction tools, in particular to a drill bit used on a drilling machine. Background technique [0002] A drill bit 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, flat drills, center drills, deep hole drills and casing drills. [0003] When digging a hole, the drill bit rotates around the vertical axis and moves axially at the same time. The soil is cut under the action of the torque and axial force of the drill bit, and is destroyed and loosened under the action of the extrusion and centrifugal force of the working blade, forming a soil flow and pressing against the hole wall. When the soil flow moves to the place where there is no pit wall, the broken soil is thrown around the pit due to the centrifugal force, and the entire pit digging process is completed. [0004] In the prior art, the punching machine ...

AI Technical Summary

Problems solved by technology

However, in the actual use process, it is necessary to constantly replace the drill bit according to the screw size used in the furniture accessories. The process of replacing the drill bit often needs to remove the drill bit as a whole, and then reinstall a new drill bit.

It is not difficult to see that on the one hand, such a replacement process is extremely inconvenient, which greatly reduces the assembly efficiency. On the other hand, repeated insertion and extraction of the drill bit from the punching machine is easy to wear the punching machine head, and repeated insertion and extraction can easily cause the drill bit and the punching hole to be damaged. The machine connection is loose

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