CN214392496U - Drill bit with centering structure - Google Patents
Drill bit with centering structure Download PDFInfo
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- CN214392496U CN214392496U CN202023291084.9U CN202023291084U CN214392496U CN 214392496 U CN214392496 U CN 214392496U CN 202023291084 U CN202023291084 U CN 202023291084U CN 214392496 U CN214392496 U CN 214392496U
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- drill bit
- centering structure
- cutting
- centering
- cutting edges
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Abstract
The utility model discloses a drill bit with centering structure, which comprises a drill bit body, wherein the drill bit body consists of a knife edge part and a clamping part, the knife edge part is connected with the clamping part, and the drill bit is characterized in that the top end of the knife edge part is provided with the centering structure; the cutting edge part is formed by spirally combining a plurality of cutting edges, the top ends of the cutting edges are intersected at a vertex, the centering structure is arranged on the vertex, the centering structure is composed of a plurality of cutting planes, and the plurality of cutting planes are equally divided by taking the vertex as the center; the drill bit body is provided with two cooling holes, and the two cooling holes penetrate through the blade part and the clamping part. In this way, the utility model relates to a drill bit with centering structure, this drill bit is through increasing centering structure to improve the centering effect of drill bit, and reduced the vibration range when the drill bit uses, prolonged the life of drill bit greatly, reduced the processing resistance simultaneously, guaranteed the stability of cutting.
Description
Technical Field
The utility model belongs to the technical field of the mould and specifically relates to a drill bit with centering structure is related to.
Background
The head structure of the conventional twist drill is provided with at least 2 main cutting edges and at least 2 auxiliary cutting edges arranged between the main cutting edges in the circumferential direction, the inner end of each main cutting edge is positioned at the rotating center, and the outer end of each main cutting edge is positioned at the outer edge of the rotating track of the corresponding main cutting edge.
The traditional twist drill has the disadvantages of unsatisfactory centering effect, large vibration amplitude during use and relatively short service life, and particularly, when a small-diameter hole is processed, the cutter diameter is small, the bearing resistance is large, and the drill is easy to break, so that the processing cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a drill bit with centering structure, can increase the centering effect of drill bit.
In order to solve the technical problem, the utility model discloses a technical scheme be: a drill bit with a centering structure comprises a drill bit body, wherein the drill bit body consists of a blade part and a clamping part, the blade part is connected with the clamping part, and the top end of the blade part is provided with the centering structure;
the cutting edge part is formed by spirally combining a plurality of cutting edges, the top ends of the cutting edges are intersected at a vertex, the centering structure is arranged on the vertex, the centering structure is composed of a plurality of cutting planes, and the plurality of cutting planes are equally divided by taking the vertex as the center;
the drill bit body is provided with two cooling holes, and the two cooling holes penetrate through the blade part and the clamping part.
In a preferred embodiment of the present invention, the number of cutting planes is greater than the number of cutting edges.
In a preferred embodiment of the present invention, the number of the cutting planes in the centering mechanism is five.
In a preferred embodiment of the present invention, the number of the cutting edges in the blade portion is two.
In a preferred embodiment of the present invention, the two cutting edges are symmetrically disposed about the axial center of the drill body.
In a preferred embodiment of the present invention, the included angle between the edge portions of the cutting edge is 135 °, and the included angle between the upper and lower sides of the cutting plane is 145 °.
In a preferred embodiment of the present invention, the cooling holes are spirally disposed in the drill body.
In a preferred embodiment of the present invention, a junction between the cutting edge portion and the clamping portion is provided with a chamfer.
The utility model has the advantages that: the utility model relates to a drill bit with centering structure, this drill bit is through increasing centering structure to improve the centering effect of drill bit, and reduced the vibration range when the drill bit uses, prolonged the life of drill bit greatly, reduced the processing resistance simultaneously, guaranteed the stability of cutting.
Drawings
FIG. 1 is a front view of a drill bit having a centering structure.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
FIG. 3 is a schematic view of the included angle of the cutting edges of a drill bit having a centering structure.
The parts in the drawings are numbered as follows: 1. a knife edge part; 2. a clamping part; 3. a cutting edge; 4. cutting a plane; 5. a cooling hole; 6. and (6) chamfering.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to make more clear and definite definitions of the scope of the present invention.
According to fig. 1 and 2, a drill bit with centering structure, includes a drill bit body, the drill bit body comprises cutting edge portion 1 and clamping portion 2, cutting edge portion 1 with clamping portion 2 is connected, and in this embodiment, the length of drill bit body is 110mm, the length of cutting edge portion 1 is 75mm, and the diameter is 2.53 ± 0.01mm, the length of clamping portion 2 is 32mm, and the diameter is 3h6 mm.
The top end of the knife edge part 1 is provided with a centering structure, the centering structure improves the centering effect of the drill bit, reduces the vibration amplitude of the drill bit during use, greatly prolongs the service life of the drill bit, reduces the machining resistance, ensures the cutting stability, adopts a small-diameter drill bit with the diameter less than 5mm, is not easy to break, and reduces the machining cost.
The cutting edge part 1 is formed by the combination of 3 spirals of a plurality of cutting edges, and is a plurality of 3 tops of cutting edge are handed over in a summit, centering structure establishes on the summit, centering structure comprises a plurality of cutting plane 4, and is a plurality of cutting plane 4 with the summit is the center partition, through the head at current drill bit increase cutting plane 4 quantity increases the drill bit centering effect, has reduced the vibration range when the drill bit uses, has prolonged the life of drill bit greatly, has reduced the processing resistance simultaneously, has guaranteed the stability of cutting.
Be equipped with two cooling holes 5 on the drill bit body, two cooling holes 5 run through cutting edge portion 1 with clamping part 2, cooling holes 5 become the heliciform and set up drill bit is internal, cooling holes 5 are used for adding the derivation of the coolant liquid man-hour.
The quantity of cutting plane 4 is greater than the quantity of cutting edge 3, in this embodiment, among the centering mechanism 4 quantity of cutting plane is five, among the cutting edge portion 1 the quantity of cutting edge 3 is two, centering structure and current drill bit shape fuse automatically, form the head shape of the five pyramid drill bit to centering effect has been improved.
Two the cutting edge 3 with the axle center symmetry of drill bit body sets up, the contained angle between the cutting edge 3's the cutting part is 135, the contained angle of cutting plane top and bottom is 145.
The cutting edge part 1 with the 2 junctions of clamping part are equipped with chamfer 6, chamfer 6 makes cutting edge part 1 with the transition of 2 junctions of clamping part is more smooth and easy, has increased the hardness of junction simultaneously.
Compared with the prior art, the utility model relates to a drill bit with centering structure, this drill bit is through increasing centering structure to improve the centering effect of drill bit, and reduced the vibration range when the drill bit uses, prolonged the life of drill bit greatly, reduced the processing resistance simultaneously, guaranteed the stability of cutting.
In the description of the present invention, it should be noted that all the components are general standard components or components known to those skilled in the art, the structure and principle of the components are all known to those skilled in the art through technical manuals or through conventional testing methods, and the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the positions or positional relationships based on the positions or positional relationships shown in the drawings, or the positions or positional relationships usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but not for indicating or implying that the indicated device or element must have a specific position, be constructed and operated in a specific position, and therefore, should not be construed as limiting the present invention.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (8)
1. A drill bit with a centering structure comprises a drill bit body, wherein the drill bit body consists of a blade part and a clamping part, and the blade part is connected with the clamping part;
the cutting edge part is formed by spirally combining a plurality of cutting edges, the top ends of the cutting edges are intersected at a vertex, the centering structure is arranged on the vertex, the centering structure is composed of a plurality of cutting planes, and the plurality of cutting planes are equally divided by taking the vertex as the center;
the drill bit body is provided with two cooling holes, and the two cooling holes penetrate through the blade part and the clamping part.
2. The drill bit with a centering structure of claim 1, wherein the number of cutting planes is greater than the number of cutting edges.
3. The drill bit having a centering structure according to claim 1, wherein the number of cutting planes in the centering structure is five.
4. The drill bit having a centering structure according to claim 1, wherein the number of the cutting edges in the blade portion is two.
5. The drill bit of claim 4, wherein the two cutting edges are symmetrically disposed about the axial center of the bit body.
6. The drill bit with the centering structure as claimed in claim 5, wherein the included angle between the edge portions of the cutting edges is 135 °, and the included angle between the upper and lower sides of the cutting plane is 145 °.
7. The drill bit with a centering structure of claim 1, wherein said cooling holes are helically disposed within said drill bit body.
8. The drill bit with the centering structure as claimed in claim 1, wherein a chamfer is provided at a junction of the blade portion and the holder portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023291084.9U CN214392496U (en) | 2020-12-30 | 2020-12-30 | Drill bit with centering structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023291084.9U CN214392496U (en) | 2020-12-30 | 2020-12-30 | Drill bit with centering structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214392496U true CN214392496U (en) | 2021-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023291084.9U Active CN214392496U (en) | 2020-12-30 | 2020-12-30 | Drill bit with centering structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN214392496U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115255426A (en) * | 2022-07-15 | 2022-11-01 | 东风汽车集团股份有限公司 | Centering rotary power drilling tool for removing welding spots and welding spot removing method |
-
2020
- 2020-12-30 CN CN202023291084.9U patent/CN214392496U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115255426A (en) * | 2022-07-15 | 2022-11-01 | 东风汽车集团股份有限公司 | Centering rotary power drilling tool for removing welding spots and welding spot removing method |
| CN115255426B (en) * | 2022-07-15 | 2024-04-19 | 东风汽车集团股份有限公司 | Centering rotary power drilling tool for removing welding spots and welding spot removing method |
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