Drill bit structure
A drill bit and head technology, applied in the field of drill bit structure of printed circuit boards, can solve the problems of reducing the structural strength of the overall blade surface, reducing the service life of the drill bit, and large drilling resistance, so as to achieve low drilling resistance, increase life, and increase The effect of service life
Inactive Publication Date: 2017-03-15
TCT GLOBAL
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Problems solved by technology
In such a designed cutter face structure 10, the auxiliary cutter faces 14, 14' will greatly reduce the strength of the overall cutter face structure 10, making the cutter face easy to break and reduce the service life of the drill bit; The thickness T of the center of the cutter face constructed by the edge 121 and an edge 141 of the auxiliary cutter face 14 is relatively large, resulting in a relatively large drop-in resistance during drilling, which easily reduces the service life of the drill bit
Method used
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Embodiment Construction
[0037] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.
[0038] figure 2 Shown is a schematic structural view of the drill bit structure of an embodiment of the present invention, as figure 2 As shown, a drill bit structure 20 includes a shank section 22 and a blade section 24, the blade section 24 is arranged at one end of the shank section 22, and a knife face center 26 is arranged at the front end of the blade section 24, and the knife face center 26 Two symmetrical main cutter faces 28, 28' are formed obliquely on both sides backwards, please refer to Figure 3a and Figure 3b Shown are respectively a top view of the end face and a partial side view of the drill bit structure of the first embodiment of the present invention, such as Figure 3a and Figure 3b As shown, each ma...
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The invention provides a drill bit structure. The drill bit structure comprises a handle section and a blade section. The blade section is arranged at one end of the handle section. A tool face center is arranged at the foremost end of the blade section. Two symmetric main tool faces are formed on the two sides of the tool face center in a backward oblique manner. Each main tool face comprises a cutting edge, a tool back edge and an outer edge. The two outer edges of the two main tool faces extend and spiral in the handle section direction along the peripheral face of the blade section to form two spiral side blades and two chip removal trenches. The cutting edge of each main tool face and part of the tool back edge of the other main tool face are jointly provided with an auxiliary tool face in an extending manner. The auxiliary tool faces extend to the wall faces of the chip removal trenches. An included angle is formed between each auxiliary tool face and the horizontal plane. By means of the drill bit structure, the thickness of the tool face center can be reduced so that downward drilling resistance can be small during drilling and the service life of a main shaft can be prolonged.
Description
technical field [0001] The present invention relates to a drill structure, and more particularly to a drill structure suitable for a printed circuit board (PCB). Background technique [0002] With the development of science and technology, the wires on the printed circuit board are gradually developing towards high-density and high-precision line thinning. In response to the highly competitive environment of high quality, high demand and fast supply of printed circuit boards in the market, the industry's precision, strength and feed rate of micro drills used in the drilling process of printed circuit boards, Even the quality of the hole wall and other processing conditions are getting higher and higher. Moreover, in practice, the industry usually performs the same drilling process on stacked multi-piece printed circuit boards to improve processing efficiency and reduce manufacturing costs. It has sufficient strength and chip removal ability. [0003] The micro drill mainl...
Claims
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IPC IPC(8): B23B51/02
CPCB23B51/02B23B2251/14B23B2251/24B23B2251/408
Inventor 简松豪赵莉怡林凤钰赵铭元陈俊佑
Owner TCT GLOBAL