Drill bit of replaceable cutter head type structure

Abstract

The invention discloses a drill bit of a replaceable cutter head type structure. Currently, a drill bit of a replaceable cutter head type structure high in machining accuracy, high in mounting accuracy and stable in rotating does not exist. The drill bit comprises a cutter rod, a cutter head and a fixing screw. The cutter rod comprises a cutter rod body. The drill bit is characterized in that a cutter head locating groove is formed in the front end of the cutter rod body, two supporting planes are arranged on the cutter head locating groove, after one supporting plane rotate around the axis of the cutter rod by 180 degrees, the supporting plane and the other supporting plane are overlapped, a locking groove is formed in a fixing column, the fixing column is arranged in a cutter head locating hole in a sleeved mode, a cutter head body is placed in the cutter head locating groove, the two supporting faces on the cutter head are tightly attached to the two supporting planes on the cutter rod respectively, the locating bottom face on the cutter head is tightly attached to the bottom of the cutter head locating groove, the fixing screw is in thread connection into a cutter head fixing hole, and the front end of the fixing screw abuts against the locking groove in the cutter head. The drill bit is high in machining accuracy, high in mounting accuracy, stable in rotating and stable in cutting, the cutter head can be abandoned, and service life is long.

Description

technical field [0001] The invention relates to a drill bit, in particular to a drill bit with a replaceable cutter head structure, which is mainly used in hole processing in the machining industry and belongs to a hardware processing tool. Background technique [0002] The specifications of the cemented carbide twist drills commonly used in the existing market are relatively small, and the large-scale cemented carbide twist drills are constantly being developed. Because the existing cemented carbide twist drills usually adopt a monolithic structure, that is, The tool holder and the cutter head are not detachable, and the connection between the cutter holder and the cutter head is fixed by welding, which leads to high production cost and low resource utilization rate of the hard alloy twist drill. It is especially obvious in the above. In addition, it also makes the processing of cemented carbide twist drills difficult, complicated and has a short service life. [0003] The...

AI Technical Summary

Problems solved by technology

The machining accuracy of these existing drill bits with replaceable cutter heads is not high, the installation accuracy is not high, the rotation is not stable enough, and the cutting is not stable enough

[0004] To sum up, at present there is no drill with a replaceable cutter head structure that satisfies reasonable structural design, high machining accuracy, high installation accuracy, stable rotation, stable cutting, disposable cutter head, and long service life.

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