CN203541644U - Double-head center drill - Google Patents
Double-head center drill Download PDFInfo
- Publication number
- CN203541644U CN203541644U CN201320690335.1U CN201320690335U CN203541644U CN 203541644 U CN203541644 U CN 203541644U CN 201320690335 U CN201320690335 U CN 201320690335U CN 203541644 U CN203541644 U CN 203541644U
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- CN
- China
- Prior art keywords
- drill
- handle portion
- double
- head center
- drill handle
- 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 the technical field of hardware cutters, in particular to a double-head center drill. The double-head center drill comprises pilot drills and a drill handle portion which is of a cylindrical structure, a positioning thread is arranged in the middle of the drill handle portion, and a positioning nut is arranged on the positioning thread; the pilot drills are arranged at the two ends of the drill handle portion. The double-head center drill is simple and reasonable in structure; after the drill handle portion is fixed on a three-jaw chuck, the positioning nut is rotated, so that a front ring makes contact with the end faces of clamping jaws, end face friction force between the drill handle portion and the clamping jaws is enhanced, and a slipping phenomenon can be avoided effectively; the pilot drills at the two ends can be dismounted and replaced rapidly, cutter materials are saved, and production efficiency is improved.
Description
Technical field
The utility model relates to hardware and cutting-tools technical field, particularly a kind of double end center bit.
Background technology
Drill bit is hardware and cutting-tools common in machining, be generally used for the operations such as the centering, boring, bore hole of workpiece, and the drill bit using in different technological processes also differs from one another.At present common drill bit generally comprises cutting portion that twisted shape puts the first edge on a knife or a pair of scissors and the clamping shank of cylindricality, after shank grips by fixture and rotate and process thereupon.Perforate adds and often there will be man-hour chucking power deficiency, cutting edge passivation, the workpiece material of fixture to have the situations such as hard spot, makes to get loose and skid between drill bit and fixture, causes scrapping of drill bit and workpiece, affects manufacturing schedule.In some nonstandard holes, add man-hour, need the frequent drill bit that switches to do repeatedly processing, complex procedures and inefficiency, therefore need current technology to improve.
Utility model content
The purpose of this utility model is for the defect of prior art and deficiency, and a kind of simple in structure, accurate positioning, double end center bit easy to use are provided.
For achieving the above object, the utility model is by the following technical solutions:
A kind of double end center bit described in the utility model, comprises pilot drill and drill shank, and described drill shank is column structure setting, and the middle part of drill shank is provided with positioning threads, and positioning threads is provided with setscrew nut; Described drill shank two ends are equipped with pilot drill.
Further, on the end face of described setscrew nut both sides, be equipped with preposition ring.
Further, between described pilot drill and drill shank, adopt dismountable being threaded.
The utility model beneficial effect is: the utility model is simple and reasonable, and after drill shank is fixing on scroll chuck, turn setscrew nut makes itself and the end face conflict of claw, has increased the end-face friction between drill shank and claw, can effectively avoid skidding; Double end pilot drill fast demountable is changed, and has both saved cutter material, has improved again production efficiency.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
In figure:
1, pilot drill; 2, drill shank; 3, positioning threads;
4, setscrew nut; 5, preposition ring.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, a kind of double end center bit described in the utility model, comprise pilot drill 1 and drill shank 2, described drill shank 2 is column structure setting, it is accurately to find center accurately that drill shank 2 grips on scroll chuck, the middle part of drill shank 2 is provided with positioning threads 3, and positioning threads 3 is provided with setscrew nut 4; Setscrew nut 4 is provided with preposition ring 5 near the end face of drill shank 2 one sides; After drill shank 2 is fixed on scroll chuck, positioning threads 3 is placed in the outside of claw, and rotation setscrew nut 4 makes it near claw end face, and then preposition ring 5 and claw end face are conflicted, increase frictional force between drill shank 2 and claw, promote clamping dynamics to avoid as far as possible skidding.
Described drill shank 2 two ends are equipped with pilot drill 1, between pilot drill 1 and drill shank 2, adopt dismountable being threaded, pilot drill 1 adopts the cold rolling fluted drill of high-speed steel, pilot drill 1 cutting edge is split into multi-step shape, can meet different processing requests, and dismounting and change is convenient and swift, effectively improved production efficiency.
The above is only preferred embodiments of the present utility model, and the equivalence of doing according to structure, feature and principle described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.
Claims (3)
1. a double end center bit, comprises pilot drill (1) and drill shank (2), it is characterized in that: described drill shank (2) is column structure setting, and the middle part of drill shank (2) is provided with positioning threads (3), and positioning threads (3) is provided with setscrew nut (4); Described drill shank (2) two ends are equipped with pilot drill (1).
2. double end center bit according to claim 1, is characterized in that: on the end face of described setscrew nut (4) both sides, be equipped with preposition ring (5).
3. double end center bit according to claim 1, is characterized in that: between described pilot drill (1) and drill shank (2), adopt dismountable being threaded.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201320690335.1U CN203541644U (en) | 2013-11-04 | 2013-11-04 | Double-head center drill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201320690335.1U CN203541644U (en) | 2013-11-04 | 2013-11-04 | Double-head center drill |
Publications (1)
Publication Number | Publication Date |
---|---|
CN203541644U true CN203541644U (en) | 2014-04-16 |
Family
ID=50459813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201320690335.1U Expired - Fee Related CN203541644U (en) | 2013-11-04 | 2013-11-04 | Double-head center drill |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN203541644U (en) |
Cited By (2)
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 |
CN114535664A (en) * | 2022-03-10 | 2022-05-27 | 常州市西夏墅永昌工具有限公司 | Detachable center drill convenient to clamp and position |
-
2013
- 2013-11-04 CN CN201320690335.1U patent/CN203541644U/en not_active Expired - Fee Related
Cited By (2)
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 |
CN114535664A (en) * | 2022-03-10 | 2022-05-27 | 常州市西夏墅永昌工具有限公司 | Detachable center drill convenient to clamp and position |
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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: 20140416 Termination date: 20141104 |
|
EXPY | Termination of patent right or utility model |