CN202399328U - Barrier-free cutting woodworking straight twist drill - Google Patents
Barrier-free cutting woodworking straight twist drill Download PDFInfo
- Publication number
- CN202399328U CN202399328U CN2011205724707U CN201120572470U CN202399328U CN 202399328 U CN202399328 U CN 202399328U CN 2011205724707 U CN2011205724707 U CN 2011205724707U CN 201120572470 U CN201120572470 U CN 201120572470U CN 202399328 U CN202399328 U CN 202399328U
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- CN
- China
- Prior art keywords
- drill
- barrier
- drill body
- cutting
- woodworking
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- 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 - Lifetime
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Abstract
The utility model provides a barrier-free cutting woodworking straight twist drill, which comprises a drill stock. The drill stock is connected with a drill stem, the drill stem is connected with a drill body, a spiral chip groove is arranged on the drill body, a conical screw is disposed in the middle of the head of the drill body, and a main cutting edge is arranged at the front end of the drill body and positioned on one side of the root of the conical screw. The barrier-free cutting woodworking straight twist drill is characterized in that a spiral surface serving as a cutting relief angle surface is formed at the front end of the drill body and positioned on the periphery of the root of the conical screw. The design idea of a nail-shaped peripheral edge of a common woodworking straight twist drill with poor mechanical strength is abandoned, an eccentric auxiliary cutting edge formed by a cutting rake angle surface and the circumferential surface of the main cutting edge is used as a peripheral edge of the barrier-free cutting woodworking straight twist drill, impact resistance is improved, and accordingly barrier-free cutting is realized.
Description
Technical field
The utility model relates to a kind of accessible cutting carpenter Straight spiral drill, can be widely used on construction site wood template, indoor and outdoor construction and decoration and the open-air outmoded timber boring processing on boring or other nonmetallic materials, belongs to the carpenter and processes the drilling tool technical field.
Background technology
Drilling deep hole on timber generally adopts carpenter's Straight spiral drill.The at present used common carpenter's Straight spiral drill of this type is as shown in Figure 1; Comprise drillstock 7; Drillstock 7 jointed rods 6, drilling rod 6 connects drill body 1, and drill body 1 is provided with a spirality chip area 5; Front end at drill body 1 is provided with all swords 4 of a nail sheet and main cutting edge 3, and conical screw 2 is located in the middle of the head of drill body 1.Owing to receive the structural restriction of drill bit material, sized and drill body; The mechanical strength of all swords 4 of nail sheet is not fine; In case in boring procedure, run into the barrier of nail in the timber and so on; Often cause whole the damage of drill bit cutting edge, Zhou Ren to fracture and scrap, influence construction speed, deficiency in economic performance.
Summary of the invention
The order of the utility model provides a kind of carpenter's Straight spiral drill of in boring procedure, running into the hard barrier can tipping.
In order to achieve the above object, the technical scheme of the utility model has provided a kind of accessible cutting carpenter Straight spiral drill, comprises drillstock; The drillstock jointed rod; Drilling rod connects drill body, on drill body, is provided with a spirality chip area, and conical screw is located in the middle of the head of drill body; A side that is positioned at the conical screw root at the drill body front end is provided with main cutting edge, it is characterized in that: the periphery that is positioned at the conical screw root at the drill body front end is formed with a helicoid as the back angle face.
The mentality of designing that it is not good nail sheet Zhou Ren that the utility model has been abandoned common carpenter's Straight spiral drill mechanical strength; Adopting the preceding edged surface of cutting of main cutting edge and the front cutting edge of the band off-centre that periphery forms is Zhou Ren; With the raising impact resistance, thereby realize accessible cutting.
Description of drawings
Fig. 1 is the structural representation of original carpenter's Straight spiral drill;
The structural representation of a kind of accessible cutting carpenter Straight spiral drill that Fig. 2 provides for the utility model;
Fig. 3 is that the A of Fig. 2 is to view;
Fig. 4 is that the B of Fig. 2 is to view.
The specific embodiment
For making the utility model more obviously understandable, now with a preferred embodiment, and conjunction with figs. elaborates as follows.
Extremely shown in Figure 4 like Fig. 2; The utility model provides a kind of accessible cutting carpenter Straight spiral drill, comprises drillstock 7, drillstock 7 jointed rods 6; Drilling rod 6 connects drill body 1; On drill body 1, be provided with a spirality chip area 5, conical screw 2 is located in the middle of the head of drill body 1, and a side that is positioned at conical screw 2 roots at drill body 1 front end is provided with main cutting edge 3; The periphery that is positioned at conical screw 2 roots at drill body 1 front end is formed with a helicoid as back angle face 8, and back angle face 8 is positioned at the cylindrical place of main cutting edge 3.
During work, drillstock 7 clampings make the accessible cutting of the utility model carpenter's Straight spiral drill and mechanical connection in electric hand drill, bench drill or other mechanical drill chucks or in the insertion fast replacing drill dog; And the transferring power moment of torsion, make the rotation of the accessible cutting of the utility model carpenter Straight spiral drill, conical screw 2 is aimed at by drill center; Axial compressive force gets in the material awl point a little, and conical screw 2 screws in material subsequently; And drive drill bit to material movement; Main cutting edge 3 cuts off axial and circumferential material fiber in the material hole respectively with all swords, discharges along spirality chip area 5, forms a circular hole.
Claims (1)
1. accessible cutting carpenter Straight spiral drill; Comprise drillstock (7); Drillstock (7) jointed rod (6); Drilling rod (6) connects drill body (1), on drill body (1), is provided with a spirality chip area (5), and conical screw (2) is located in the middle of the head of drill body (1); A side that is positioned at conical screw (2) root at drill body (1) front end is provided with main cutting edge (3), it is characterized in that: the periphery that is positioned at conical screw (2) root at drill body (1) front end is formed with a helicoid as back angle face (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205724707U CN202399328U (en) | 2011-12-31 | 2011-12-31 | Barrier-free cutting woodworking straight twist drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205724707U CN202399328U (en) | 2011-12-31 | 2011-12-31 | Barrier-free cutting woodworking straight twist drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202399328U true CN202399328U (en) | 2012-08-29 |
Family
ID=46697002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205724707U Expired - Lifetime CN202399328U (en) | 2011-12-31 | 2011-12-31 | Barrier-free cutting woodworking straight twist drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202399328U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104960046A (en) * | 2015-07-30 | 2015-10-07 | 浙江野牛工具有限公司 | Eccentric nail cutting auger bit |
-
2011
- 2011-12-31 CN CN2011205724707U patent/CN202399328U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104960046A (en) * | 2015-07-30 | 2015-10-07 | 浙江野牛工具有限公司 | Eccentric nail cutting auger bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120829 |