CN102380644A - Twist drill - Google Patents
Twist drill Download PDFInfo
- Publication number
- CN102380644A CN102380644A CN2010102683813A CN201010268381A CN102380644A CN 102380644 A CN102380644 A CN 102380644A CN 2010102683813 A CN2010102683813 A CN 2010102683813A CN 201010268381 A CN201010268381 A CN 201010268381A CN 102380644 A CN102380644 A CN 102380644A
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- China
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- end part
- rear end
- drill bit
- drilling
- blades
- 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 relates to a twist drill, comprising a drilling handle and a drilling bit, wherein the drilling bit is a twist type drilling bit. The twist drill is characterized in that the drilling bit has a stepped structure; the diameter of the front end part of the drilling bit is less than that of the rear end part of the drilling bit; the front end part and the rear end part of the drilling bit are respectively provided with two knife edges; and the included angle between the two knife edges on the front end part is equal to that between the two knife edges on the rear end part. The twist drill has the advantages of simple structure, convenience in use, high drilling efficiency and good drilling quality.
Description
Technical field
The present invention relates to a kind of drill bit, relate in particular to a kind of fluted drill.
Background technology
At present workpiece is carried out for there is higher precision in the hole that guarantees to process, needs subdrilling one aperture, and then carrying out reaming in the processing of hole.Present way is exactly to get out aperture with the path drill bit earlier, changes the drill bit reaming of big footpath then, and operation bothers very much like this, and inefficiency.Also having is exactly the easy offset tool that takes place of reaming after changing big footpath drill bit, causes the reaming failure.Therefore, need a kind of new technical scheme to solve above-mentioned technical problem.
Summary of the invention
The purpose of this invention is to provide a kind of brill, expand the compound fluted drill of one.
The technical scheme that the present invention adopts is:
A kind of fluted drill; Comprise drillstock and drill bit; Said drill bit is a fried dough twist formula drill bit, and said drill bit is a step structure, and the fore-end diameter of said drill bit is less than rear end part; Be equipped with two blades on said chisel edge part and the rear end part, angle equates between two blades between two blades on the said fore-end on angle and the rear end part.
Said angle is 120-140 °.
Drill bit of the present invention adopts step structure, and the fore-end diameter of drill bit is less than rear end part, and on chisel edge part and rear end part, is equipped with two blades; Fore-end gets out aperture earlier like this; Rear end part carries out reaming to aperture simultaneously, need not tool changing, saves time; Reduce trouble, improve drilling efficiency; Offset tool takes place during for fear of reaming, and angle between two blades on angle between two blades on the fore-end and the rear end part is designed to equate.
Advantage of the present invention is: simple in structure, easy to use, drilling efficiency is high, drilling quality is good.
Description of drawings
Fig. 1 is an overall structure sketch map of the present invention.
Wherein: 1, drillstock, 2, drill bit, 3, fore-end, 4, rear end part, 5, blade.
The specific embodiment
As shown in Figure 1, a kind of fluted drill comprises drillstock 1 and fried dough twist formula drill bit 2; Drill bit 2 is a step structure, and fore-end 3 diameters of drill bit 2 are less than rear end part 4, and on chisel edge part 3 and rear end part 4, is equipped with two blades 5; Fore-end 3 gets out aperture earlier like this, and 4 pairs of apertures of rear end part carry out reaming simultaneously, need not tool changing; Save time, reduce trouble, improve drilling efficiency; Offset tool takes place during for fear of reaming, and 5 angles of two blades on the fore-end 3 are designed to equate with 5 angles of two blades on the rear end part 4, and are and are 120-140 °.
Claims (2)
1. fluted drill; Comprise drillstock and drill bit; Said drill bit is a fried dough twist formula drill bit, it is characterized in that: said drill bit is a step structure, and the fore-end diameter of said drill bit is less than rear end part; Be equipped with two blades on said chisel edge part and the rear end part, angle equates between two blades between two blades on the said fore-end on angle and the rear end part.
2. a kind of fluted drill according to claim 1 is characterized in that: said angle is 120-140 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102683813A CN102380644A (en) | 2010-08-30 | 2010-08-30 | Twist drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102683813A CN102380644A (en) | 2010-08-30 | 2010-08-30 | Twist drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102380644A true CN102380644A (en) | 2012-03-21 |
Family
ID=45820705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102683813A Pending CN102380644A (en) | 2010-08-30 | 2010-08-30 | Twist drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102380644A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056424A (en) * | 2013-01-04 | 2013-04-24 | 昆山上达精密配件有限公司 | Step drill |
| CN108097999A (en) * | 2017-12-25 | 2018-06-01 | 东佑达机器人（苏州）有限公司 | A kind of drilling machine |
| CN108098025A (en) * | 2018-02-01 | 2018-06-01 | 苏州阿诺精密切削技术有限公司 | For the cornish bit of ultrashort ladder hole machined |
-
2010
- 2010-08-30 CN CN2010102683813A patent/CN102380644A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056424A (en) * | 2013-01-04 | 2013-04-24 | 昆山上达精密配件有限公司 | Step drill |
| CN108097999A (en) * | 2017-12-25 | 2018-06-01 | 东佑达机器人（苏州）有限公司 | A kind of drilling machine |
| CN108098025A (en) * | 2018-02-01 | 2018-06-01 | 苏州阿诺精密切削技术有限公司 | For the cornish bit of ultrashort ladder hole machined |
| CN108098025B (en) * | 2018-02-01 | 2023-10-03 | 苏州阿诺精密切削技术有限公司 | Reaming cutter for processing ultra-short stepped hole |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120321 |