CN202571412U - Double-end self-centering tungsten steel drill - Google Patents
Double-end self-centering tungsten steel drill Download PDFInfo
- Publication number
- CN202571412U CN202571412U CN 201220119557 CN201220119557U CN202571412U CN 202571412 U CN202571412 U CN 202571412U CN 201220119557 CN201220119557 CN 201220119557 CN 201220119557 U CN201220119557 U CN 201220119557U CN 202571412 U CN202571412 U CN 202571412U
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- China
- Prior art keywords
- centering
- end self
- double
- drill
- tungsten steel
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- 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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Abstract
The utility model belongs to the field of drills and particularly relates to a double-end self-centering tungsten steel drill. The double-end self-centering tungsten steel drill comprises a drill handle. Two ends of the drill handle are respectively provided with a conical connection portion respectively, each conical connection portion is provided with a cutting portion comprising a chip discharge groove and cutting edges, an included angle between the cutting edges is 130 degrees, and the screw angle of the chip discharge groove is 30 degrees. The double-end self-centering tungsten steel drill has the advantages that self-centering can be realized, no slipping is caused, drilling efficiency is high and the service life is prolonged.
Description
Technical field
The utility model belongs to the drill bit field, specifically is that a kind of double end self-centering wolfram steel bores.
Background technology
At present, drill bit is used widely in machine-building and commercial production as a kind of process tool commonly used.The linear pattern main cutting edge of existing drill bit is longer; Two main cutting edges are connected by chisel edge, and chip pocket is a spirality, is convenient to chip removal like this; A spiral fluted part constitutes rake face; Rake face and drift angle have determined the size of anterior angle, and the apex point anterior angle is not only closely related with helical angle, and receive the influence of cutting edge inclination.Existing drill bit has following shortcoming: the one, and the anterior angle numerical value change of each point is very big on the main cutting edge, has been negative rake near boring the core place, and machining condition is poor; The 2nd, chisel edge is oversize, and very big sword drift angle is arranged, and is again very big negative rake, and machining condition is poorer, thereby axially big, the cutting energy consumption of drag greatly, skid easily can not feel relieved quickly and accurately, and existing drill bit is generally single head.
Summary of the invention
The problem that the utility model will solve is how to make drill bit non-slip, the ability self-centering, and can both hole at two, provide double end self-centering wolfram steel to bore.
The utility model provides following technical scheme:
Double end self-centering wolfram steel bores, and it comprises the drill shank of drill bit, and the drill shank two ends are provided with taper connection portion; Be provided with cutting portion in two taper connection portions; Cutting portion comprises chip area and cutting edge, and the angle of cutting edge is 130 °, 30 ° of the helical angles of chip area.
Described drill bit length overall L is 60mm.
Described drillstock diameter is 2.99mm-3.01mm.
Described cutting portion length l is 5mm.
The length L of described connecting portion ' be 3mm.
The utility model has the advantages that and can realize oneself centering, non-slip, drilling efficiency is high, long service life.
Description of drawings
Fig. 1 is the structural representation of the utility model.
The specific embodiment
As shown in Figure 1; Double end self-centering wolfram steel bores, and it comprises the drill shank 1 of drill bit, and drill shank 1 two ends are provided with taper connection portion 2; Be provided with cutting portion 3 in two taper connection portions 2; Cutting portion comprises chip area 3a and cutting edge 3b, and the angle of cutting edge 3b is 130 °, 30 ° of the helical angles of chip area 3a.
Described drill bit length overall L is 60mm.
Described drillstock diameter is 2.99mm-3.01mm.
Described cutting portion length l is 5mm.
The length L of described connecting portion ' be 3mm.
Claims (5)
1. double end self-centering wolfram steel bores, and it comprises the drill shank of drill bit, and the drill shank two ends are provided with taper connection portion; Be provided with cutting portion in two taper connection portions; Cutting portion comprises chip area and cutting edge, and the angle of cutting edge is 130 °, 30 ° of the helical angles of chip area.
2. double end self-centering wolfram steel according to claim 1 bores, and it is characterized in that: described drill bit length overall (L) is 60mm.
3. double end self-centering wolfram steel according to claim 1 bores, and it is characterized in that: described drillstock diameter is 2.99mm-3.01mm.
4. double end self-centering wolfram steel according to claim 1 bores, and it is characterized in that: described cutting portion length (l) is 5mm.
5. double end self-centering wolfram steel according to claim 1 bores, and it is characterized in that: the length of described connecting portion (L ') is 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220119557 CN202571412U (en) | 2012-03-27 | 2012-03-27 | Double-end self-centering tungsten steel drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220119557 CN202571412U (en) | 2012-03-27 | 2012-03-27 | Double-end self-centering tungsten steel drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202571412U true CN202571412U (en) | 2012-12-05 |
Family
ID=47240864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220119557 Expired - Fee Related CN202571412U (en) | 2012-03-27 | 2012-03-27 | Double-end self-centering tungsten steel drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202571412U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537735A (en) * | 2013-11-04 | 2014-01-29 | 无锡雨田精密工具有限公司 | Double-head center bit |
| CN105728780A (en) * | 2016-03-31 | 2016-07-06 | 安徽奇峰机械装备有限公司 | High-speed drilling equipment |
| CN105728773A (en) * | 2016-03-31 | 2016-07-06 | 安徽奇峰机械装备有限公司 | Drilling equipment capable of easily removing impurities |
| CN109128322A (en) * | 2018-09-30 | 2019-01-04 | 中国航空工业标准件制造有限责任公司 | Milling cutter is used in sulculus processing |
-
2012
- 2012-03-27 CN CN 201220119557 patent/CN202571412U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537735A (en) * | 2013-11-04 | 2014-01-29 | 无锡雨田精密工具有限公司 | Double-head center bit |
| CN105728780A (en) * | 2016-03-31 | 2016-07-06 | 安徽奇峰机械装备有限公司 | High-speed drilling equipment |
| CN105728773A (en) * | 2016-03-31 | 2016-07-06 | 安徽奇峰机械装备有限公司 | Drilling equipment capable of easily removing impurities |
| CN105728773B (en) * | 2016-03-31 | 2017-10-27 | 安徽奇峰机械装备有限公司 | A kind of rig for being easy to removal of impurities |
| CN105728780B (en) * | 2016-03-31 | 2017-11-17 | 安徽奇峰机械装备有限公司 | A kind of high-speed drilling equipment |
| CN109128322A (en) * | 2018-09-30 | 2019-01-04 | 中国航空工业标准件制造有限责任公司 | Milling cutter is used in sulculus processing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20160327 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |