CN217941967U - Double-edged drill with fixed-point guiding function - Google Patents
Double-edged drill with fixed-point guiding function Download PDFInfo
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- CN217941967U CN217941967U CN202221790578.8U CN202221790578U CN217941967U CN 217941967 U CN217941967 U CN 217941967U CN 202221790578 U CN202221790578 U CN 202221790578U CN 217941967 U CN217941967 U CN 217941967U
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Abstract
The utility model discloses a double-edged drill with fixed point guiding, which comprises a clamping part and a cutting part arranged at the front end of the clamping part, wherein one end of the cutting part, which is far away from the clamping part, is a drill point part, and the outer surface of the cutting part is provided with two chip grooves to the drill point part, so that the front end of the drill point part forms a drill point; and a main cutting edge and a cutter groove are arranged between the two chip grooves, the drill tip part forms the drill tip after the front end of the cutting part axially extends for a distance T, and the sharp angle of the drill tip is 115-118 degrees. The utility model has the advantages that the drill bit has good centering capacity by arranging the drill bit part extending for a certain distance at the front end of the cutting part; the drill point angle can improve the stability of drill point centering, so that the same drill can not only meet the requirements of drilling a centering hole, but also can perform drilling processing simultaneously, the processing period of a workpiece is shortened, and the production efficiency is improved.
Description
Technical Field
The utility model relates to a drill bit, in particular to twolip drill bit with fixed point direction.
Background
The centering problem of the drill is particularly important during drilling and machining, the existing chisel edge drill meets certain drilling operations, and the existing chisel edge drill cannot provide a center or a round hole with accurate positioning, so that the curved surface is usually machined and formed in order to improve the centering accuracy and prevent the large-diameter drill from deflecting. A small-diameter drill bit is required to be used for drilling a center hole for positioning, and then the required large-diameter drill bit is matched for forming, so that the processing period is long.
Disclosure of Invention
In order to overcome the defects, the utility model provides a twolip drill bit with fixed point direction that both had centering ability and can carry out drilling simultaneously.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: the double-edge drill with fixed point guiding comprises a clamping part and a cutting part arranged at the front end of the clamping part, wherein a drill tip part is arranged at one end, far away from the clamping part, of the cutting part, and two chip removal grooves are formed in the outer surface of the cutting part and reach the drill tip part, so that the drill tip is formed at the front end of the drill tip part; and a main cutting edge and a cutter groove are arranged between the two chip grooves, wherein the drill tip part forms the drill tip after the front end of the cutting part axially extends for a distance T, and the sharp angle of the drill tip is 115-118 degrees.
As a further improvement of the present invention, the distance T is 0.5 times the outer diameter of the clamping portion.
As a further improvement of the present invention, the drill tip portion is formed by extending the drill tip axially rearward and tapering radially outward with the front end of the chip portion being engaged.
As a further improvement of the utility model, the knife groove is a straight groove with a front angle of 3 degrees to 4 degrees.
As a further improvement of the utility model, the outer diameter of the cutting part is 2.0 to 12mm.
As a further improvement of the utility model, the outer diameter of the clamping part is 6.0 to 12mm.
The utility model has the advantages that: the drill bit has good centering capacity by arranging the drill tip part extending for a certain distance at the front end of the cutting part; the sharp angle of the drill point is 115-118 degrees, so that the centering stability of the drill point is improved, the processing period of a workpiece is shortened, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is an enlarged schematic view of the cutting portion and the drill tip portion of the present invention.
The following description is made with reference to the accompanying drawings:
1. a clamping portion; 2. a cutting portion; 21. a chip groove; 3. drilling a tip part; 31. drilling a tip; 4. a main cutting edge; 5. the knife groove.
Detailed Description
The following description of a preferred embodiment of the present invention will be made in conjunction with the accompanying drawings.
Referring to fig. 1 and 2, the utility model provides a pair of embodiment with twolip drill bit of fixed point direction, this drill bit is made by hard material, wholly is cylindricly, including clamping part 1 and the cutting part 2 of locating 1 front end of this clamping part, the rear end of clamping part 1 is used for being connected with the lathe main shaft, and the lathe main shaft can drive this drill bit and process work piece basicity drilling around its central axis is rotatory. The end of the cutting part 2 far away from the clamping part 1 is a drill tip part 3, two chip removal grooves 21 are formed in the outer surface of the cutting part 2 to reach the drill tip part 3, a drill tip 31 is formed at the front end of the drill tip part, and a main cutting edge 4 and a cutter groove 5 are formed between the two chip removal grooves 21. The drill tip 31 can drill the surface of a workpiece quickly when the drill bit rotates, and the front end of the chip removal groove 21 extends to the end face of the drill tip 31, so that the drill bit cannot be damaged due to unsmooth chip removal during quick rotation drilling.
Wherein the drill tip part 3 forms a drill tip 31 after the front end of the cutting part 2 extends axially for a distance T, and the angle alpha of the tip 31 is 115-118 degrees. In particular, the end surface of the chip flute 21 extending to the drill tip 31 forms a first cutting edge a and a second cutting edge b, the angle α between which is 115 ° to 118 °, preferably 116 °.
Further, the distance T is 0.5 times the outer diameter D of the holder 1. The drilling tip 3 extends axially rearward from the drill tip 31 and tapers radially outward into engagement with the front end of the chip part 2. Specifically, the drill tip 3 extends a distance T such that the outer wall surface of the drill tip 3 forms a pair of auxiliary surfaces c that are substantially straight but taper radially outward as the outer wall surface extends axially rearward. And finally engages with the front end of the cutting part 2. In this embodiment, the clamping portion 1, the cutting portion 2, and the drilling tip portion 3 are integrally formed.
Further, the sipe 5 is a straight groove having a rake angle of 3 ° to 4 °. Specifically, the cutter groove 5 adopts a straight groove design with a shearing angle of 3 degrees, so that the sharp main cutting edge 4 can reduce the cutting resistance and improve the smoothness of the processed surface.
Further, the outer diameter D of the cutting part 2 is 2.0 to 12mm. The outer diameter of the clamping portion 1 is 6.0 to 12mm.
In summary, the double-edged drill with fixed-point guiding provided by the utility model has the advantages that the drill tip part extending for a certain distance is arranged at the front end of the cutting part, so that the drill has good centering capability; the sharp angle of the drill point is 115-118 degrees, so that the centering stability of the drill point is improved, the same drill can meet centering and can drill at the same time, the processing period of a workpiece is shortened, and the production efficiency is improved.
In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The foregoing description is only a preferred embodiment of the invention, which can be embodied in many different forms and is therefore not limited to the specific embodiments disclosed above. While the invention has been described with reference to specific embodiments, it will be apparent to one skilled in the art that various changes and modifications can be made, and equivalents employed, without departing from the scope of the invention. All the contents that do not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention all still belong to the protection scope of the technical solution of the present invention.
Claims (6)
1. A double-edge drill with fixed point guiding comprises a clamping part (1) and a cutting part (2) arranged at the front end of the clamping part (1), wherein a drill tip part (3) is arranged at one end, far away from the clamping part (1), of the cutting part (2), two chip discharge grooves (21) are formed in the outer surface of the cutting part (2) to the drill tip part (3), and a drill tip (31) is formed at the front end of the drill tip part; two be equipped with main cutting edge (4) and sword groove (5) between chip groove (21), its characterized in that: the drill tip (3) forms the drill tip (31) after the front end of the cutting part (2) axially extends for a distance T, and the angle of the sharp corner of the drill tip (31) is 115-118 degrees.
2. The double-edged drill with fixed point steering according to claim 1, wherein: the distance T is 0.5 times the outer diameter of the clamping part (1).
3. The double-edged drill with fixed point steering according to claim 1, wherein: the drill tip part (3) extends axially backwards from the drill tip (31) and tapers radially outwards to be connected with the front end of the cutting part (2).
4. The double-edged drill with fixed point steering according to claim 1, wherein: the knife grooves (5) are straight grooves with rake angles of 3-4 degrees.
5. The double-edged drill with fixed point steering according to claim 1, wherein: the outer diameter of the cutting part (2) is 2.0 to 12mm.
6. The double-edged drill with fixed point steering according to claim 2, wherein: the outer diameter of the clamping part (1) is 6.0-12 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221790578.8U CN217941967U (en) | 2022-07-12 | 2022-07-12 | Double-edged drill with fixed-point guiding function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221790578.8U CN217941967U (en) | 2022-07-12 | 2022-07-12 | Double-edged drill with fixed-point guiding function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217941967U true CN217941967U (en) | 2022-12-02 |
Family
ID=84221420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221790578.8U Active CN217941967U (en) | 2022-07-12 | 2022-07-12 | Double-edged drill with fixed-point guiding function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217941967U (en) |
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2022
- 2022-07-12 CN CN202221790578.8U patent/CN217941967U/en active Active
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