CN203887282U - Composite drill bit - Google Patents
Composite drill bit Download PDFInfo
- Publication number
- CN203887282U CN203887282U CN201420355770.3U CN201420355770U CN203887282U CN 203887282 U CN203887282 U CN 203887282U CN 201420355770 U CN201420355770 U CN 201420355770U CN 203887282 U CN203887282 U CN 203887282U
- Authority
- CN
- China
- Prior art keywords
- drill bit
- chamfering
- angle
- chamfer
- utility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The utility model discloses a composite drill bit which comprises a drill bit body (1). A taper angle (2) is arranged at the front end of the drill bit body (1), a first chamfer (3) and a second chamfer (4) are arranged on the drill bit body (1), the angle of the first chamfer (3) is 60-62 degrees, and the angle of the second chamfer (4) is 116-118 degrees; the drill bit body (1) is further provided with a spiral groove (5), and the spiral groove (5) is connected with one point of the front end of the first chamfer (3) and one point of the front end of the second chamfer (4). Few burrs can be generated on the periphery of a machined hole through the composite drill bit.
Description
Technical field
The utility model relates to bit technique field, is specifically a kind of composite drill bit.
Background technology
Axle is machined piece, and the common drill bit of the general employing of fine finishining of its endoporus directly bores.But because drill bit is directly to get out through hole, therefore make all burrs in the hole processing more, thereby be difficult to meet the processing request in hole.For these reasons, urgently need a kind of composite drill bit, this composite drill bit can make all burrs in the hole processing less, to solve the problem of processing in hole.
Utility model content
The technical problems to be solved in the utility model is, a kind of composite drill bit is provided, and this composite drill bit can make all burrs in the hole processing less.
The technical solution of the utility model is, a kind of composite drill bit is provided, and comprises drill body, and the front end of described drill body is provided with a cone angle; Described drill body is provided with the first chamfering and the second chamfering; The angle of described the first chamfering is 60-62 °; The angle of described the second chamfering is 116-118 °; On described drill body, be also provided with helical groove, described helical groove is connected with a point of the first chamfering front end, a point of the second chamfering front end.
On described drill body, be also provided with dial.
The angle of described cone angle is 140 °
Adopt after above structure, the utility model compared with prior art, has the following advantages:
The utility model composite drill bit, in when boring, is eliminated the burr on limit by the first chamfering, by helical groove, waste material is thrown away again, thereby makes all burrs in the hole that composite drill bit processes less, and then meet the processing request in hole on float simultaneously.
As improvement, on described drill body, be also provided with dial.Can clearly see the degree of depth of portalling by dial, thereby processor brings convenience.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model composite drill bit.
Shown in figure 1, drill body, 2, cone angle, 3, the first chamfering, 4, the second chamfering, 5, helical groove, 6, dial.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, a kind of composite drill bit of the utility model, comprises drill body 1, and the front end of described drill body 1 is provided with a cone angle 2; Described drill body 1 is provided with the first chamfering 3 and the second chamfering 4; The angle of described the first chamfering 3 is 60-62 °, and in the present embodiment, the angle of the first chamfering 3 is 61 °; The angle of described the second chamfering 4 is 116-118 °, and in the present embodiment, the angle of the second chamfering 4 is 117 °; On described drill body 1, be also provided with helical groove 5, described helical groove 5 is connected with a point of the first chamfering 3 front ends, a point of the second chamfering 4 front ends, be equivalent to the sidewall of helical groove 5 and a point of the first chamfering 3 front ends, the second chamfering 4 front ends, so conveniently the waste material of generation thrown away fast.
On described drill body 1, be also provided with dial 6.
The angle of described cone angle 2 is 140 °.
Below be only described with regard to most preferred embodiment of the present utility model, but can not be interpreted as it is limitations on claims.The utility model is not limited only to above embodiment, and its concrete structure allows to change.In every case the various variations of doing in the protection domain of the utility model independent claims are all in protection domain of the present utility model.
Claims (3)
1. a composite drill bit, comprises drill body (1), and the front end of described drill body (1) is provided with a cone angle (2); It is characterized in that: described drill body (1) is provided with the first chamfering (3) and the second chamfering (4); The angle of described the first chamfering (3) is 60-62 °; The angle of described the second chamfering (4) is 116-118 °; On described drill body (1), be also provided with helical groove (5), described helical groove (5) is connected with a point of the first chamfering (3) front end, a point of the second chamfering (4) front end.
2. composite drill bit according to claim 1, is characterized in that: on described drill body (1), be also provided with dial (6).
3. composite drill bit according to claim 1, is characterized in that: the angle of described cone angle (2) is 140 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420355770.3U CN203887282U (en) | 2014-06-28 | 2014-06-28 | Composite drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420355770.3U CN203887282U (en) | 2014-06-28 | 2014-06-28 | Composite drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203887282U true CN203887282U (en) | 2014-10-22 |
Family
ID=51713730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420355770.3U Expired - Fee Related CN203887282U (en) | 2014-06-28 | 2014-06-28 | Composite drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203887282U (en) |
-
2014
- 2014-06-28 CN CN201420355770.3U patent/CN203887282U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 315174 ancient industrial zone, Gaoqiao Town, Ningbo, Zhejiang, Yinzhou District Patentee after: Ningbo Sanfeng Mechatronics Co., Ltd. Address before: 315174 ancient industrial zone, Gaoqiao Town, Ningbo, Zhejiang, Yinzhou District Patentee before: Ningbo Sanfeng Mechatronics Co., Ltd |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20190628 |