CN203599592U - Split type twist drill - Google Patents
Split type twist drill Download PDFInfo
- Publication number
- CN203599592U CN203599592U CN201320808549.4U CN201320808549U CN203599592U CN 203599592 U CN203599592 U CN 203599592U CN 201320808549 U CN201320808549 U CN 201320808549U CN 203599592 U CN203599592 U CN 203599592U
- Authority
- CN
- China
- Prior art keywords
- countersunk head
- drill
- drill body
- drill bit
- straight pin
- 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 discloses a split type twist drill which comprises a drill body and a drill bit. The drill bit body is a conical plate with the upper end narrower than the lower end, the upper end of the drill body is provided with a conical groove matched with the conical body of the drill bit body, the upper portion of the drill body is provided with a horizontal hole in sliding fit with a countersunk head cylindrical pin, the two ends of the horizontal hole are provided with counter bores matched with the countersunk head body of the countersunk head cylindrical pin and the countersunk head body of a countersunk head screw respectively, hexagonal holes are formed in the countersunk head body of the countersunk head cylindrical pin and the countersunk head body of the countersunk head screw respectively, the countersunk head screw is matched with a threaded hole in the countersunk head cylindrical pin, and a hole which is in sliding fit with the countersunk head cylindrical pin and formed in the drill bit body is opposite to the horizontal hole in the upper portion of the drill body. The a split type twist drill has the advantages of being simple in structure, accurate in locating, low in manufacturing cost and convenient to replace.
Description
Technical field:
The utility model relates to a kind of drill bit, particularly drill bit and drill body is split type fluted drill.
Background technology:
Existing widely used fluted drill is that drill bit and drill body are monolithic construction, after bit wing sharpening damages, needs to carry out by hand sharpening, makes because drill bit generally adopts tool steel, its anti-wear performance is lower, can only reface for several times, the drill bit that need more renew, the use cost causing is high; The carbide alloy that anti-wear performance is high as adopted is made, and the cost of this integral (drill) bit is just very high.For addressing the above problem, there is the structure that drill bit and drill body are split type fluted drill abroad, there is following several version: screw axial locking and pin location structure; Screw axial locking and V-type face location structure; Turn to reverse screw lock and broken line groove location structure with drill bit; The compound location of tongue and groove and pin, side pressure locking mechanism etc., the fluted drill structure of above-mentioned interchangeable bit is more complicated, and difficulty of processing is larger, and cost is high, reduces expenses not obvious, and its popularization is restricted.
Summary of the invention:
The utility model object is to provide a kind of simple in structure, accurate positioning, and cost of manufacture is low and change split type fluted drill easily.
The technical scheme that realizes the utility model object is, a kind of split type fluted drill, comprise drill body and drill bit, it is characterized in that: the drill body of described drill bit is the wide conical plate in narrow lower end, upper end, the upper end of described drill body is provided with the cone tank matching with the conical plate of described drill body, the top of described drill body is provided with the transverse holes slippery with countersunk head straight pin, the two ends of this transverse holes are respectively equipped with the counterbore matching with the countersunk head body of described countersunk head straight pin and the countersunk head body of sunk screw, in the countersunk head body of described countersunk head straight pin and in the countersunk head body of described sunk screw, be respectively provided with hexagonal hole, screwed hole in described sunk screw and described countersunk head cylinder shank matches, the hole slippery with described countersunk head straight pin of establishing on described drill body is relative with the transverse holes on drill body top.
The utility model has simple in structure compared with the prior art, accurate positioning, and cost of manufacture is low and change remarkable advantage easily.
Accompanying drawing explanation:
Fig. 1 is front view of the present utility model; Fig. 2 is the A-A cut-away view of Fig. 1.
The specific embodiment:
In conjunction with following embodiment, the utility model is described in detail, the drill body that drill bit 2 is provided with drill lip is that longitudinal cone tank of the wide conical plate in narrow the inner, outer end and drill body 1 termination matches, ditch back at drill body 1 arranges the transverse holes slippery with countersunk head straight pin 4, the two ends of this transverse holes are respectively equipped with the counterbore matching with the countersunk head body of countersunk head straight pin and the countersunk head body of sunk screw 5, in the countersunk head body of described countersunk head straight pin and in the countersunk head body of sunk screw, are respectively provided with hexagonal hole.Screwed hole in described sunk screw and described countersunk head cylinder shank matches, the interior transverse holes matching with countersunk head straight pin that arrange of described drill body, should be located at the ditch back of drill body, avoid external be exposed in chip area 3 of countersunk head straight pin and affect chip removal, this hole and drill bit oblique (referring to Fig. 2).The effect of the gapless sliding fit in the hole on transverse holes and drill bit on countersunk head straight pin and drill body is the accurate location of guaranteeing drill bit and drill body.
Installation of the present utility model and using method, first drill bit is pushed this cone tank from the port of the cone tank of drill body termination, after the transverse holes matching with countersunk head straight pin on the hole slippery with countersunk head straight pin and drill body on drill body is alignd, countersunk head straight pin is injected in above-mentioned hole, now the lower surface of drill body contacts with the bottom surface of the cone tank on drill body, after with two hexagons, sunk screw being screwed in the screwed hole of countersunk head straight pin and screwing bit body is tightened up, just can carry out Drilling operation, when after the cutting edge wearing and tearing of drill bit, just can take out and carry out sharpening or new drill bit is loaded onto and holed from drill body, do not affect production.Simple in structure and the requirement on machining accuracy of this split-type structural countersunk head straight pin, sunk screw and taper bit body is low, thereby its cost is low, simultaneously easy for installation.
Claims (1)
1. a split type fluted drill, comprise drill body and drill bit, it is characterized in that: the drill body of described drill bit is the wide conical plate in narrow lower end, upper end, the upper end of described drill body is provided with the cone tank matching with the conical plate of described drill body, the top of described drill body is provided with the transverse holes slippery with countersunk head straight pin, the two ends of this transverse holes are respectively equipped with the counterbore matching with the countersunk head body of described countersunk head straight pin and the countersunk head body of sunk screw, in the countersunk head body of described countersunk head straight pin and in the countersunk head body of described sunk screw, be respectively provided with hexagonal hole, screwed hole in described sunk screw and described countersunk head cylinder shank matches, the hole slippery with described countersunk head straight pin of establishing on described drill body is relative with the transverse holes on drill body top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320808549.4U CN203599592U (en) | 2013-12-11 | 2013-12-11 | Split type twist drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320808549.4U CN203599592U (en) | 2013-12-11 | 2013-12-11 | Split type twist drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203599592U true CN203599592U (en) | 2014-05-21 |
Family
ID=50712293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320808549.4U Expired - Fee Related CN203599592U (en) | 2013-12-11 | 2013-12-11 | Split type twist drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203599592U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692001A (en) * | 2013-12-11 | 2014-04-02 | 吉林大学 | Split type twist drill |
-
2013
- 2013-12-11 CN CN201320808549.4U patent/CN203599592U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692001A (en) * | 2013-12-11 | 2014-04-02 | 吉林大学 | Split type twist drill |
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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: 20140521 Termination date: 20141211 |
|
| EXPY | Termination of patent right or utility model |