Micro three-wing bit and processing method thereof

Abstract

The invention relates to the technical field of drill bits, and discloses a micro three-wing bit and a processing method thereof. The micro three-wing bit comprises a drill stem. The bottom end of the drill stem is provided with a drill end portion. The center of the drill end portion is provided with a drill tip. The periphery of the drill stem is provided with three chip pockets respectively arranged in a spiral manner along the drill stem. The three chip pockets are arranged at interval in sequence. The side edge of the drill end portion is provided with three main cutting edges. The three main cutting edges are arranged around the drill tip in sequence. The drill end portion is provided with three chisel edges, and the three chisel edges surround the drill tip in sequence, and are intersected at the drill tip. The side edge of the drill end portion is provided with three main cutting edges. When the drill tip is drilling, the drill end portion forms three support points, thereby increasing balance of the drill tip and reducing wearing of the main cutting edges. The three chip pockets increase chip removal time, and the length of the chisel edge is enough, thereby increasing core thickness and greatly improving rigidity of the drill tip. Therefore, for the drill tip, in a process of drilling, probability of drill broken phenomenon is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of drill bits, in particular to a miniature three-edged drill bit and a processing method thereof. Background technique [0002] At present, the PCB board is a component widely used in electronic products. In the process of processing the PCB board, a drill is often required to drill the PCB board. [0003] refer to figure 1 As shown in level 2, in the prior art, the drill bit commonly used in PCB board drilling has two symmetrical cutting edges and two symmetrical chip pockets 11, and the drill bit with this structure has the following defects: [0004] 1) The rigidity is small; especially for small drills, because there are two symmetrical chip pockets 11, the thickness of the drill core becomes very thin, so the rigidity becomes smaller and the drill is prone to breakage; [0005] 2) The chisel edge is long; therefore, when the drill bit is drilling, the friction between the drill point and the PCB boar...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a miniature three-edged drill bit, which aims to solve the problem that in the prior art, the drill bit used for PCB board drilling has the defects of low rigidity, long chisel edge and easy wear, which leads to the problem that the drill bit is prone to breakage

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