CN2663109Y - Carpenter flat drill - Google Patents
Carpenter flat drill Download PDFInfo
- Publication number
- CN2663109Y CN2663109Y CN 200320129979 CN200320129979U CN2663109Y CN 2663109 Y CN2663109 Y CN 2663109Y CN 200320129979 CN200320129979 CN 200320129979 CN 200320129979 U CN200320129979 U CN 200320129979U CN 2663109 Y CN2663109 Y CN 2663109Y
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- CN
- China
- Prior art keywords
- drilling
- plane
- rake face
- drill
- flat 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 discloses a flat carpenter drill, which is composed of a flat shovel-shaped drilling segment and a drill rod, wherein one end of the flat shovel-shaped drilling segment is provided with a left, a middle and a right drill tips, and the front cutter faces of the drill tips arranged at the left and the right sides are respectively tilted to two reverse directions, a tilting angle tilted to the two reverse directions is formed between the vertical plane of the same drilling plane and the front cutter faces, and the front cutter faces of two cutting edges are in the shape of a spiral surface. The front cutter faces of the drill tips at two sides are changed to respectively tilt to two reverse directions from being vertical to an original drilling plane, and the front cutter faces become the spiral surfaces. Thus, the strength of the cutting edge is enhanced, cutting scraps can be conveniently discharged, and cutting conditions are improved.
Description
Technical field
The utility model provides a kind of instrument, especially a kind of Woodworking flat drill.
Background technology
The drilling section of Woodworking flat drill is flat shovel type, has three apex points in left, center, right, and the main effect of center apex point is centering, and the both sides apex point is a main cutting edge.The drill lip of the two ends apex point of Woodworking flat drill of the prior art only has relief angle, no anterior angle, thereby cutting edge is sharp inadequately, and simultaneously, rake face is perpendicular to the drilling plane, and the smear metal of being bored outside the tap, problems such as stopping up, generate heat, burn occurs smoothly easily.
Summary of the invention
The purpose of this utility model is to improve deficiency of the prior art, provides a kind of two ends blade tip more sharp and have enough intensity, a Woodworking flat drill that the smear metal that is produced can be discharged smoothly.
The purpose of this utility model is achieved in that
The Woodworking flat drill that the utility model provides, it is made up of flat spade drilling section and drilling rod, one end of described flat shovel type drilling section has three apex points in left, center, right, the rake face of being located at the apex point of the left and right sides tilts to two opposite directions respectively, and have the inclination angle that tilts to two rightabouts between the vertical plane with the drilling plane, make the rake face shape such as the helicoid of described two cutting edges.
The back knife face of described left and right sides apex point is parallel with described rake face.
Because the rake face of described left and right sides apex point is tilted, formed above-mentioned described helicoid, so can make front edge more sharp, and had enough intensity, and the smear metal that produces also can waltz through the screw action of described helicoid and discharge smoothly from cutting region, therefore, can improve machining condition greatly, improve cutting power.
In addition, on the centering blade tip of centre,, on rake face and back knife face, also be provided with an inclined plane except having in its both sides the opposite relief angle in inclination angle, have an anterior angle between itself and the vertical plane, make that termination of this fixed new apex point is sharp-pointed tip with the drilling plane.Like this, can make new surely blade tip also sharper, non-slip, make the cutting ability of this Woodworking flat drill better.
The Woodworking flat drill that the utility model provides, became respectively to tilt perpendicular to the drilling plane by original by rake face, and made rake face become helicoid, can improve the intensity of cutting edge thus to two opposite directions with the both sides apex point, more help smooth and easy discharge smear metal, improve machining condition.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
The main TV structure schematic diagram of the Woodworking flat drill that Fig. 1 provides for the utility model;
The plan structure schematic diagram of the Woodworking flat drill that Fig. 2 provides for the utility model;
The right TV structure schematic diagram of the Woodworking flat drill that Fig. 3 provides for the utility model;
The left TV structure schematic diagram of the Woodworking flat drill that Fig. 4 provides for the utility model.
The specific embodiment
Shown in Fig. 1 to 4, the Woodworking flat drill 1 that the utility model provides, it is made up of flat spade drilling section 2 and drilling rod 21.One end of flat shovel type drilling section 2 has three apex points in left, center, right 3,4 and 5, being located at the apex point 3 of the left and right sides and 5 rake face 31 and 51 tilts to two opposite directions respectively, and have the inclination angle a1 and the a2 that tilt to two rightabouts between the vertical plane with the drilling plane, make the rake face end of described two cutting edges have three apex points in left, center, right 3,4 and 5, be located at rake face 31 and 51 shapes such as the helicoid of the apex point of the left and right sides.Left and right sides apex point 3 is parallel with 51 with rake face 31 with 52 with 5 back knife face 32.
On the centering apex point 4 of centre, except having in its both sides the opposite relief angle in inclination angle, on rake face 41 and back knife face 42, also be respectively equipped with an inclined plane 43 and 44, the anterior angle b1 and the b2 that have an opposite sign but equal magnitude between itself and the vertical plane with the drilling plane make that the termination of this centering apex point is sharp-pointed tip 45.
Claims (4)
1, a kind of Woodworking flat drill, it is characterized in that: it is made up of flat spade drilling section and drilling rod, one end of described flat shovel type drilling section has three apex points in left, center, right, the rake face of being located at the apex point of the left and right sides tilts to two opposite directions respectively, and have the inclination angle that tilts to two rightabouts between the vertical plane with the drilling plane, make the rake face shape such as the helicoid of described two cutting edges.
2, Woodworking flat drill according to claim 1 is characterized in that: the back knife face of described left and right sides apex point is parallel with described rake face.
3, Woodworking flat drill according to claim 1 and 2, it is characterized in that: on the described centering blade tip of centre, except having in its both sides the opposite relief angle in inclination angle, on rake face and back knife face, also be provided with an inclined plane, its with having an anterior angle that direction is opposite between the vertical plane on drilling plane respectively, make that the termination of this centering apex point is sharp-pointed tip.
4, Woodworking flat drill according to claim 3 is characterized in that: the anterior angle equal and opposite in direction that described direction is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320129979 CN2663109Y (en) | 2003-12-24 | 2003-12-24 | Carpenter flat drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320129979 CN2663109Y (en) | 2003-12-24 | 2003-12-24 | Carpenter flat drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2663109Y true CN2663109Y (en) | 2004-12-15 |
Family
ID=34350039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320129979 Expired - Fee Related CN2663109Y (en) | 2003-12-24 | 2003-12-24 | Carpenter flat drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2663109Y (en) |
-
2003
- 2003-12-24 CN CN 200320129979 patent/CN2663109Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JIANGSU TIANGONG TOOL CO., LTD. Free format text: FORMER NAME OR ADDRESS: JIANGSU TIANGONG TOOLS CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 212312 Danyang City, Jiangsu province Zhen Qian Xiang Village Patentee after: Jiangsu Tiangong Tool Co., Ltd. Address before: 212312 Danyang City, Jiangsu province Zhen Qian Xiang Village Patentee before: Tiangong Tools Co., Ltd., Jiangsu Prov. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20041215 Termination date: 20111224 |