Improved surface structure of drill bit

Abstract

The utility model relates to an improved surface structure of a drill bit, which is mainly provided with a drill bit, the drill bit is provided with a handle part, a blade part and a blade head part sequentially extend from one side of the handle part, and the blade part is provided with a plurality of blades which spirally extend in a staggered manner. The surface of each cutting edge is provided with at least one heat avoiding groove extending from the cutting edge head part to the handle part, when the drill bit is used for drilling a preset plate, each heat avoiding groove in the plurality of cutting edges is far away from the inner wall surface of the preset plate, so that the gap between the heat avoiding grooves and the inner wall surface is increased, and the accumulation of heat energy of the drill bit is reduced. The service life of the drill bit is prolonged.

Description

Technical Field

[0001] The utility model relates to an improvement of the surface structure of a drill bit, in particular to a drill bit in which at least one heat avoidance groove is recessed on the surface of each cutting edge, so that when drilling, each cutting edge of the drill bit can reduce contact with the surface of a preset plate in the drill hole and increase the gap with the inner wall surface, so as to reduce the accumulation of heat energy during drilling and achieve the purpose of heat dissipation, thereby prolonging the service life of the drill bit. Background Art

[0002] With the progress of current technology, commonly used electronic products and electronic devices such as smart phones, tablet computers, and notebook computers have been widely used, which has promoted the progress of related industries such as semiconductors and circuit boards. Moreover, the volumes of various electronic products and components are getting smaller and smaller. Among them, the printed circuit boards for positioning electronic components in each electronic product must also be reduced in volume along with the electronic products.

[0003] In the processes of cutting and processing circuit boards and printed boards, drilling operations are mostly carried out using drill bits and micro drill bits. With the development of technology, the prosperity of automation and assembly lines, the usage frequency of each drill bit and drill needle has been greatly increased. As a result, manufacturers and operators are worried about the damage of consumables. Therefore, how to reduce the damage of consumables such as drill needles and drill bits to improve their service life is the key point that those engaged in this industry urgently want to research and improve. Summary of the Utility Model

[0004] Therefore, in view of the above problems and deficiencies, the main purpose of the utility model is to provide an improvement of the surface structure of a drill bit.

[0005] The utility model provides an improvement of the surface structure of a drill bit, which mainly has a drill bit. The drill bit has a shank, and a cutting edge part and a cutting edge head part are sequentially extended from one side of the shank. The cutting edge part is provided with a plurality of cutting edges extending in a spiral and staggered manner. At least one heat avoidance groove extending from the cutting edge head part towards the shank is arranged on the surface of each cutting edge. When the drill bit drills a preset plate, each heat avoidance groove on the plurality of cutting edges can be far away from the inner wall surface of the preset plate and increase the gap with the inner wall surface, so as to reduce the accumulation of heat energy during drilling and achieve the purpose of heat dissipation, thereby prolonging the service life of the drill bit.

[0006] Wherein, a plurality of heat reduction grooves are recessed on each cutting edge of the drill bit and are formed in a staggered shape with each heat avoidance groove.

[0007] Wherein, a chip removal groove is arranged between each cutting edge of the drill bit.

[0008] Wherein, the cutting edge head part of the drill bit is provided with a first cutting surface and a second cutting surface which are symmetrical.

[0009] Wherein, a chip-breaking edge is formed on one side surface of each first cutting surface of the blade head of the drill bit.

[0010] Wherein, a drill tip is formed between the first cutting surface and the second cutting surface of the blade head of the drill bit.

[0011] Wherein, the heat avoidance grooves on each cutting edge of the drill bit are U-shaped or V-shaped flat-bottom grooves.

[0012] The main advantage of the present utility model is mainly aimed at the heat avoidance grooves provided on the plurality of cutting edges of the drill bit, so that when the drill bit drills on the preset plate, the contact with the inner wall surface of the preset plate can be reduced, the heat accumulation during the rotary cutting of the drill bit can be reduced, and thus heat dissipation and extended service life can be achieved. And by means of the two chip-breaking edges on the blade head, truncation is carried out after cutting on the first cutting surface and the second cutting surface, so as to avoid the inconvenience of discharging due to too long hair chips and residual chips as a secondary advantage. Brief Description of the Drawings

[0013] Figure 1 It is a three-dimensional external view of the surface structure improvement of the drill bit of the present utility model.

[0014] Figure 2 It is a partial enlarged view of Figure a of the present utility model.

[0015] Figure 3 It is a front view of the surface structure improvement of the drill bit of the present utility model.

[0016] Figure 4 It is a three-dimensional external view of another embodiment of the surface structure improvement of the drill bit of the present utility model.

[0017] Description of the Reference Numerals: 1 - drill bit; 11 - shank; 12 - cutting part; 120 - chip flute; 121 - cutting edge; 1210 - heat avoidance groove; 1211 - heat reduction groove; 13 - blade head; 131 - first cutting surface; 132 - second cutting surface; 133 - chip-breaking edge; 134 - drill tip. Detailed Description of the Preferred Embodiment

[0018] Please refer to Figures 1 to 3 As shown, it can be clearly seen from the figure that the drill bit 1 of the present utility model has a shank 11, and a cutting part 12 and a blade head 13 are sequentially extended on one side of the shank 11. The cutting part 12 is provided with a plurality of cutting edges 121 extending in a spiral and staggered manner. At least one heat avoidance groove 1210 extending from the blade head 13 towards the shank 11 is provided on the surface of each cutting edge 121, and a chip flute 120 is provided between each cutting edge 121.

[0019] The above-mentioned blade head 13 is provided with two first cutting surfaces 131 and two second cutting surfaces 132 that are symmetrically formed. Further, a chip-breaking edge 133 is formed on one side surface of each of the first cutting surfaces 131, and a drill tip 134 is formed between each of the first cutting surfaces 131 and each of the second cutting surfaces 132.

[0020] In addition, each of the second cutting surfaces 132 is further provided with a heat avoidance groove 1210 extending toward the shank portion 11, and the heat avoidance groove 1210 is a flat-bottomed groove recessed in a "U" shape, "V" shape or other font shape. Such simple equivalent changes and modifications do not limit the protection scope of the present utility model, and this is hereby stated.

[0021] When the surface structure of the drill bit of the present utility model is improved in practical application, it first contacts the surface of a preset plate (not shown in the figure) through the drill tip 134 of the drill bit 1. The drill bit 1 will drill into the preset plate by rotation, and each of the first cutting surfaces 131 and each of the second cutting surfaces 132 on the periphery of the drill bit 1 will cooperate with the plurality of cutting edges 121 on the blade portion 12 for rotary cutting. After the rotary cutting of each of the first cutting surfaces 131 and each of the second cutting surfaces 132, they will be truncated by the adjacent two chip-breaking edges 133 to avoid the inconvenience of discharging due to too long residual chips and burrs during drilling. Furthermore, the residual chips and burrs after cutting are discharged through the chip discharge groove 120 between the cutting edges 121. The heat avoidance grooves 1210 provided on the plurality of cutting edges 121 reduce the contact with the inner wall surface of the preset plate during the drilling process, and reduce the generation of more residual chips due to the reduced contact with the inner wall surface. And because of the reduced contact, the accumulation of heat during the rotation of the drill bit 1 will be reduced, achieving the effect of increasing the service life of the drill bit 1.

[0022] Please continue to refer to Figure 4 As shown, it can be clearly seen from the figure that a plurality of heat reduction grooves 1211 that are staggered with the heat avoidance grooves 1210 are recessed on the cutting edge 121 of the present utility model. By relying on the plurality of heat reduction grooves 1211, the gap between the cutting edge 121 and the inner wall surface of the preset plate is further reduced to reduce the contact area, achieving the effect of reducing temperature and increasing the service life.

[0023] Therefore, the present utility model mainly aims at the heat avoidance grooves 1210 provided on the plurality of cutting edges 121 of the drill bit 1, so that when the drill bit 1 drills on the preset plate, the contact with the inner wall surface of the preset plate can be reduced, thereby reducing the accumulation of heat energy during the rotary cutting of the drill bit 1, and further achieving the main feature of heat dissipation and extending the service life. And by means of the two chip-breaking edges 133 on the blade head 13, truncating after the cutting of the first cutting surface 131 and the second cutting surface 132 to avoid the inconvenience of discharging due to too long burrs and residual chips is the secondary feature.

[0024] The above are only the preferred embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Therefore, all simple modifications and equivalent structural changes made by using the content of the specification and drawings of the present utility model should be included in the patent scope of the present utility model by the same token, and are hereby stated.

Claims

1. Improvement in the surface structure of a drill bit, characterized in that: There is a drill bit, and the drill bit has a shank, and a cutting edge portion and a cutting edge head portion are sequentially extended on one side of the shank. The cutting edge portion is provided with a plurality of cutting edges extending in a spiral and staggered manner, and at least one heat avoidance groove extending from the cutting edge head portion towards the shank is provided on the surface of each cutting edge. When the drill bit drills a hole in a preset plate, each heat avoidance groove on the plurality of cutting edges can be away from the inner wall surface of the preset plate.

2. The improvement of the surface structure of the drill bit as described in claim 1, characterized in that: A plurality of heat reduction grooves are recessed on each cutting edge of the drill bit and are formed in a staggered manner with each heat avoidance groove.

3. The surface structure improvement of the drill bit as described in claim 1, characterized in that: A chip removal groove is provided between each of the cutting edges of the drill bit.

4. The surface structure improvement of the drill bit according to claim 1, characterized in that: The cutting edge head portion of the drill bit is provided with a first cutting surface and a second cutting surface that are symmetrically formed.

5. The surface structure improvement of the drill bit according to claim 4, characterized in that: A chip breaking edge is formed on one side surface of each of the first cutting surfaces of the cutting edge head portion of the drill bit.

6. The improvement of the surface structure of the drill bit as described in claim 4, characterized in that: A drill tip is formed between the first cutting surface and the second cutting surface of the cutting edge head portion of the drill bit.

7. The improvement of the surface structure of the drill bit according to claim 1, characterized in that: The heat avoidance grooves on each cutting edge of the drill bit are U-shaped or V-shaped flat-bottom grooves.

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