Replaceable cutter head type drill bit

Abstract

The invention discloses a replaceable cutter head type drill bit. Currently, a replaceable cutter head type drill bit high in machining accuracy, high in mounting accuracy and stable in cutting does not exist. The drill bit comprises a cutter rod, a cutter head, a number one screw and a number two screw. The cutter rod comprises a cutter rod body. The drill bit is characterized in that a number one boss and a number two boss are arranged at one end of the cutter rod body, a number one supporting plane and a number one fixing screw hole are formed in the number one boss, the axis of the number one fixing screw hole is perpendicular to the number one supporting plane, a locating hole is formed in the bottom of a blade groove, a number one supporting face and a number two supporting face are arranged on the two sides of a cutter head body, the number one supporting face and the number two supporting face are of a plane structure, a locating column is placed in the locating hole, the cutter head body is placed in the blade groove, the number one supporting face is tightly attached to the number one supporting plane, and the number two supporting face is tightly attached to the number two supporting plane. 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, which is mainly used in hole processing tools 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] There a...

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 replaceable cutter head drill that satisfies reasonable structural design, high processing precision, high installation precision, stable rotation, stable cutting, disposable cutter head and long service life.

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