CN201823976U - Twist drill - Google Patents
Twist drill Download PDFInfo
- Publication number
- CN201823976U CN201823976U CN2010205122163U CN201020512216U CN201823976U CN 201823976 U CN201823976 U CN 201823976U CN 2010205122163 U CN2010205122163 U CN 2010205122163U CN 201020512216 U CN201020512216 U CN 201020512216U CN 201823976 U CN201823976 U CN 201823976U
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- CN
- China
- Prior art keywords
- drill bit
- end part
- rear end
- blades
- drill
- 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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Abstract
The utility model relates to a twist drill, which comprises a drill handle and a drill bit, wherein the drill bit adopts a twisted drill bit. The twist drill is characterized in that the drill bit is in a stepped structure; the diameter of the front end part of the drill bit is smaller than that of the rear end part of the drill bit; two blades are respectively arranged at each of front end part and the rear end part of the drill bit; and the included angle between the two blades at the front end part is the same as the included angle between the two blades at the rear end part. The utility model has the advantages of simple structure, high drilling efficiency and favorable drilling quality and is convenient to use.
Description
Technical field
The utility model relates to a kind of drill bit, relates 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 have to be exactly that offset tool easily takes place in reaming after changing big footpath drill bit, to cause the reaming failure.Therefore, need a kind of new technical scheme to solve above-mentioned technical problem.
The utility model content
The purpose of this utility model provides a kind of brill, expands the compound fluted drill of one.
The technical solution adopted in the utility model is:
A kind of fluted drill, comprise drillstock and drill bit, described drill bit is a fried dough twist formula drill bit, described drill bit is a step structure, the fore-end diameter of described drill bit is less than rear end part, be equipped with two blades on described chisel edge part and the rear end part, angle equates between two blades between two blades on the described fore-end on angle and the rear end part.
Described angle is 120-140 °.
Drill bit of the present utility model 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, be 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.
The utility model has the advantages that: simple in structure, easy to use, drilling efficiency is high, drilling quality is good.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present utility model.
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, and 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, be equipped with two blades 5, and 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, described drill bit is a fried dough twist formula drill bit, it is characterized in that: described drill bit is a step structure, the fore-end diameter of described drill bit is less than rear end part, be equipped with two blades on described chisel edge part and the rear end part, angle equates between two blades between two blades on the described fore-end on angle and the rear end part.
2. a kind of fluted drill according to claim 1 is characterized in that: described angle is 120-140 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205122163U CN201823976U (en) | 2010-08-30 | 2010-08-30 | Twist drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205122163U CN201823976U (en) | 2010-08-30 | 2010-08-30 | Twist drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201823976U true CN201823976U (en) | 2011-05-11 |
Family
ID=43962534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205122163U Expired - Fee Related CN201823976U (en) | 2010-08-30 | 2010-08-30 | Twist drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201823976U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825304A (en) * | 2011-06-17 | 2012-12-19 | 马克托罗工业株式会社 | Drill bit |
| CN104416202A (en) * | 2013-09-02 | 2015-03-18 | 天工爱和特钢有限公司 | Multi-sectional drill bit |
| CN105458354A (en) * | 2014-09-12 | 2016-04-06 | 贵州西南工具(集团)有限公司 | Novel composite material drilling bit and manufacturing method thereof |
-
2010
- 2010-08-30 CN CN2010205122163U patent/CN201823976U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825304A (en) * | 2011-06-17 | 2012-12-19 | 马克托罗工业株式会社 | Drill bit |
| CN104416202A (en) * | 2013-09-02 | 2015-03-18 | 天工爱和特钢有限公司 | Multi-sectional drill bit |
| CN105458354A (en) * | 2014-09-12 | 2016-04-06 | 贵州西南工具(集团)有限公司 | Novel composite material drilling bit and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20110830 |