Cemented carbide bit

Abstract

The invention discloses a cemented carbide bit. The cemented carbide bit comprises a bit body and a bit stock. The surface of the bit body is provided with a chip groove. The upper side and the lowerside of the bit body are provided with a drilling assist device. A hollow gap is reserved between the drilling assist device and the bit body. A threaded column is further arranged at the right end ofthe bit body. The bit stock is internally provided with a threaded hole. The size of the space in the threaded hole is roughly the same as that of the threaded column. A hole drilled by the bit smaller the drilling assist device is more accurate. When the cemented carbide bit is used for drilling holes in some fine hole positions, the irreparable adverse influence caused by the inaccurate size ofthe drilled holes is avoided. On the other hand, the bit body is provided with the threaded column, the bit stock is provided with the threaded hole, and the threaded column is in threaded connectionwith the threaded hole. In the using process, only the bit body needs to be replaced. The material for manufacturing the bit stock is saved to some extent, and resources are saved.

Description

technical field [0001] The invention belongs to the technical field of drill bits, in particular to a cemented carbide drill bit. Background technique [0002] The drill bit is a tool used to drill through holes or blind holes on solid materials, and can ream existing holes. When the drill bit is drilling, it mainly cuts the workpiece through the top of the tool head; the carbide drill bit, The traditional process is to sharpen the solid round bar; when the drill bit is processed, because the drill bit needs to rotate at a high speed, and the hardness of the processed material is relatively high, a large amount of friction will be generated during the processing process. heat. [0003] Most of the cemented carbide drills in the prior art do not have tools for auxiliary drilling. When drilling some finer holes, the size of the holes may be inaccurate, causing irreparable adverse effects. On the one hand, most of the existing cemented carbide drill bits are drill shank and...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a cemented carbide drill bit, which aims to solve the problem that most of the cemented carbide drills in the prior art do not have tools for auxiliary opening. When drilling some relatively fine holes, the hole position may be caused The size of the drill is inaccurate, causing irreversible vicious effects. On the other hand, most of the existing cemented carbide drills are drill shank and drill body. The longer drill shank has caused a certain waste of resources to some extent.

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