CN102756148A - Drill bit - Google Patents
Drill bit Download PDFInfo
- Publication number
- CN102756148A CN102756148A CN2011101077558A CN201110107755A CN102756148A CN 102756148 A CN102756148 A CN 102756148A CN 2011101077558 A CN2011101077558 A CN 2011101077558A CN 201110107755 A CN201110107755 A CN 201110107755A CN 102756148 A CN102756148 A CN 102756148A
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- CN
- China
- Prior art keywords
- drill bit
- cutting
- cutting arm
- supporting rod
- cylindrical
- 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.)
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Abstract
The invention discloses a drill bit. The drill bit comprises a cylindrical clamping rod with a central axis, clamping planes are arranged on the outer circumferential surface of the clamping rod, and the drill bit is characterized in that three cutting tooth arms are evenly and fixedly arranged at one end of the clamping rod, and a cutting tooth is arranged at the tail end of each cutting tooth arm. A cutting end of the drill bit is composed of the three spiral cutting tooth arms with the cutting teeth at the tail ends, and accordingly the drill bit is simple in structure. Moreover, difficulty in drill bit processing is greatly reduced, and cost is saved.
Description
Technical field
The present invention relates to a kind of drill bit, particularly a kind of metal processing drill bit.
Background technology
In metal when boring processing, the processing of drilling cuttings is to need the problem handled always, if the drilling cuttings alluvial is too many, can not fine discharge, and be easy to just cause drill bit high temperature, and the damage drill bit, influenced the service life of drill bit.The drill bit majority that uses at present is at the drill bit excircle spiral chip area to be set, and the processing of chip area is just very complicated, has increased cost of processing.
Summary of the invention
The present invention has overcome the defective of prior art, provides a kind of cutting end to be provided with the drill bit that the spirality cutting arm of cutting is formed by three ends.
Technical scheme of the present invention is: a kind of drill bit; Comprise cylindrical supporting rod with a central axis; The supporting rod external peripheral surface is provided with the clamping plane, it is characterized in that: said supporting rod one end evenly distributes and is set with three cutting arms, and said cutting arm end is provided with cutting.
Preferably, said cutting arm twist, it is one cylindrical that the cutting arm outside surrounds, said cylindrical axle center and supporting rod central axes.
Preferably, tooth trace and back tooth trace before the preceding flank of tooth of said cutting arm forms with the back flank of tooth and any one tangent plane perpendicular to said cylindrical center axis, preceding tooth trace and back tooth trace all are the obtuse angle with it at the line formation angle near the end points in the center of circle respectively.
Preferably, said cutting is a carbide alloy, is welded on the cutting arm.
A kind of drill bit provided by the invention, the cutting end is made up of the spirality cutting arm that three ends are provided with cutting, and is simple in structure, greatly reduces the difficulty of processing of drill bit, practiced thrift cost.
Description of drawings
Fig. 1 is the structural representation of preferred embodiment drill bit of the present invention;
Fig. 2 is the cross-sectional schematic of preferred embodiment drill bit cutting arm of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the invention is described in further detail.Like Fig. 1, shown in 2, the drill bit in the preferred embodiment of the present invention comprises supporting rod 1, and supporting rod 1 is cylindrical; Have a central axis 2, the excircle side is provided with clamping plane 3, and the end welding is provided with three spirality cutting arms 4; Cutting arm 4 outsides surround a central hub 5 and overlap cylindrical with central axis 2; Cutting arm 4 ends are provided with cutting 6, and cutting 6 is a carbide alloy, are welded on the cutting arm 4; Discharge for ease of drilling cuttings; It is θ and α that tooth trace 9 and back tooth trace 10 before the preceding flank of tooth 7 of cutting arm 4 forms with any one tangent plane perpendicular to central axis 5 with the back flank of tooth 8, preceding tooth trace 9 and back tooth trace 10 form angle with it at the line near the end points in the center of circle respectively, and θ and α are the obtuse angles.
Above embodiment is merely a kind of of embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (4)
1. a drill bit comprises the cylindrical supporting rod with a central axis, and the supporting rod external peripheral surface is provided with the clamping plane, it is characterized in that: said supporting rod one end evenly distributes and is set with three cutting arms, and said cutting arm end is provided with cutting.
2. drill bit according to claim 1 is characterized in that: said cutting arm twist, it is one cylindrical that the cutting arm outside surrounds, said cylindrical axle center and supporting rod central axes.
3. according to claim 1 and claim 2 described drill bits; It is characterized in that: tooth trace and back tooth trace before the preceding flank of tooth of said cutting arm forms with the back flank of tooth and any one tangent plane perpendicular to said cylindrical center axis, preceding tooth trace and back tooth trace all are the obtuse angle with it at the line formation angle near the end points in the center of circle respectively.
4. drill bit according to claim 1 is characterized in that: said cutting is a carbide alloy, is welded on the cutting arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101077558A CN102756148A (en) | 2011-04-28 | 2011-04-28 | Drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101077558A CN102756148A (en) | 2011-04-28 | 2011-04-28 | Drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102756148A true CN102756148A (en) | 2012-10-31 |
Family
ID=47050929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101077558A Withdrawn CN102756148A (en) | 2011-04-28 | 2011-04-28 | Drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102756148A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729018A (en) * | 2015-03-18 | 2015-06-24 | 广东美的制冷设备有限公司 | Air-conditioner and control method and control device of air-conditioner |
-
2011
- 2011-04-28 CN CN2011101077558A patent/CN102756148A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729018A (en) * | 2015-03-18 | 2015-06-24 | 广东美的制冷设备有限公司 | Air-conditioner and control method and control device of air-conditioner |
| CN104729018B (en) * | 2015-03-18 | 2017-05-10 | 广东美的制冷设备有限公司 | Air-conditioner and control method and control device of air-conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20121031 |
|
| DD01 | Delivery of document by public notice |
Addressee: Yang Baoqiang Document name: Notification of Passing Examination on Formalities |
|
| DD01 | Delivery of document by public notice |
Addressee: Suzhou Tabinuo electromechanical Finance Company Limited Document name: Notification of Approving Refund |