CN2356139Y - Composite sheet tooth drill bit - Google Patents
Composite sheet tooth drill bit Download PDFInfo
- Publication number
- CN2356139Y CN2356139Y CN 98242026 CN98242026U CN2356139Y CN 2356139 Y CN2356139 Y CN 2356139Y CN 98242026 CN98242026 CN 98242026 CN 98242026 U CN98242026 U CN 98242026U CN 2356139 Y CN2356139 Y CN 2356139Y
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- CN
- China
- Prior art keywords
- tooth
- cutting edge
- cone
- cutter
- sheet shape
- 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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- Earth Drilling (AREA)
Abstract
The utility model relates to a composite sheet tooth drill bit, which is composed of a drill bit steel body 1, sphere tooth-shaped cutting edges 2, sheet-shaped cutting edges 3 and water holes 4. The sphere tooth-shaped cutting edges 2 are vertically distributed on an inner ring of a head end surface of the drill bit steel body 1, the sheet-shaped cutting edges 3 are vertically and radially distributed on an outer ring of a head end surface of the drill bit steel body 1, and the water hole 4 are distributed on the head end surface of the drill bit steel body 1. The utility model is characterized in that the sheet-plate cutting edges 3 is an entirety which is composed of outer edge chisel gears 5 and inner side conical gears 6, and a flute is arranged between the chisel gear 5 and the conical gear 6. The utility model has a self-sharpening function in the process of rock drilling, the function is profitable for keeping a rapid rock drilling speed in later-stage of the rock drilling, and therefore, rock drilling efficiency is increased.
Description
The utility model belongs to a kind of drilling tool.
In the prior art, the bore bit that is used for rock drilling point has sheet shape bore bit, ball profile of tooth bore bit and composite flat tooth bits three major types by the cutting tooth shape.Sheet shape bore bit cuts a hole in than the soft layer rock stratum that to advance effect better.Ball profile of tooth bore bit is suitable in than competent bed cutter and advances, but in the utmost point competent bed cutter to advance speed slower, the broken tooth rate of heel teeth is higher.ZL96203054.6 discloses a kind of composite flat tooth bits, it is characterized in that the interior ring of the vertical dispersed placement of ball profile of tooth cutting edge in bore bit steel body head end, and sheet shape cutting edge is vertical and be the outer shroud of radial arrangement in bore bit steel body head end.This bore bit is cut a hole in comprising the various rock stratum of utmost point competent bed, it is long to have kept the ball profile of tooth bore bit crown blunt cycle, the industry drilling speed is than sheet shape bore bit advantages of higher, sheet shape bore bit strong shock resistance, strong, the sharp-pointed efficiency of breaking rock height of knife edge of anti-gauge wear ability have also been kept, can the reusable advantage of reconditioning after the limit sharpening is blunt, improve thereby all have more significantly than other type bore bit at aspects such as cutting rate, application lifes.But also discovery simultaneously, this bore bit are in use, and early stage, cutting rate was very fast, and the later stage cutting rate is slack-off, thereby influences the further raising of rock penetration performance.Tracing it to its cause, is that sheet shape limit sword is not good enough from sharp ability.
The purpose of this utility model provides a kind of composite flat tooth bits, improve sheet shape limit sword from sharp ability, reduce the reconditioning number of times of opposite side sword, until not needing reconditioning just can guarantee that certain cutting rate cuts a hole the raising rock penetration performance continuously.
The utility model comprises bore bit steel body 1, ball profile of tooth cutting edge 2, sheet shape cutting edge 3 and water hole 4, ball profile of tooth cutting edge 2 vertical dispersed placement are at the interior ring of bore bit steel body 1 head end, sheet shape cutting edge 3 is vertical and be the outer shroud of radial arrangement in bore bit steel body 1 head end, water hole 4 is arranged in bore bit steel body 1 head end, it is characterized in that sheet shape cutting edge 3 is special-shaped cutting edges, is by outer rim cutter tooth 5 and inboard cone tooth 6 integral body dimerous.Sheet shape cutting edge 3 long 12-32mm, wide 6-16mm, high 14-28mm; Cutter tooth 5 and awl have a groove between the tooth 6, and and the root platform between curved transition, arc radius 2-4mm.Awl tooth 6 and cutter tooth 5 are 6-10mm from the top to height the root platform; Awl tooth 6 root diameter (RD) φ 6-16mm, 45 °-65 ° of cone angles, tooth top arc radius 2-6mm; Cutter tooth 5 tooth top arc radius 1-3mm, tooth top width 1-12mm, 2 °-5 ° of outer skew angles, 25 °-55 ° of the inboard basils.Cutter tooth 5 has two kinds of design schemes, and a kind of scheme is to make teeth shape, promptly cuts a hole tooth 5 outside circle arc dias 1-3mm, tooth top width 4-12mm, 2 °-5 ° of outer skew angles, 25 °-55 ° of the inboard basils.Another scheme is to make the half cone profile of tooth, promptly cuts a hole 35 °-55 ° of tooth 5 cone angles, vertex of a cone arc radius 2-6mm, root diameter (RD) 6-16mm, 2 °-5 ° of outer skew angles.
The sheet shape cutting edge 3 that the utility model is made up of cutter tooth 5 and awl tooth 6 is an integral body, can be arranged vertically the outer shroud in bore bit steel body 1 head end, has strong shock resistance, protects the footpath, is difficult for the advantage of tipping, thereby kept the advantage of prior art.The particular design of the cutter tooth 5 outer skew angles and the inboard basil, it is reached from sharp effect with hole wall and landwaste wearing and tearing in the impact rotating process, can remain more sharp-pointed knife edge, guarantee that bore bit also has higher cutting rate in the later stage of rock drilling process, thereby overcome the deficiency of prior art.Simultaneously, cutter tooth 5 and push away groove between the tooth 6, can also save carbide alloy, help the flushing liquor circulation, strengthen row's powder effect, and making cutting edge in time obtain cooling, the assurance impact strength is suffered a loss less, thereby reaches the purpose that improves rock penetration performance and application life and reduce the rock drilling cost on the whole.
Fig. 1 is the composite flat tooth bits elevation.
Fig. 2 is sheet shape cutting edge 3 lateral views.
1. bore bit steel body, 2. ball profile of tooth cutting edge, 3. a shape cutting edge, 4. water hole, 5. cutter tooth, 6. awl tooth.
Composite flat tooth bits with a kind of φ 90 is an example.Ball profile of tooth cutting edge 2 has 7, and vertical dispersed placement is at the interior ring of bore bit steel body 1 head end, and sheet shape cutting edge 3 has 8, and is vertical and be the outer shroud of radial arrangement in bore bit 1 head end; Ball profile of tooth cutting edge 2 is selected the meshing gold of corresponding conventional ball for use; Sheet shape cutting edge 3 long 18mm, wide 11mm, high 17mm; Awl tooth 6 root diameter (RD) 11mm, 60 ° of cone angles, vertex of a cone arc radius 4mm, the vertex of a cone are cut a hole tooth 5 tooth top arc radius 2mm, tooth top width 8mm to high 8mm between the root platform: 4 ° of outer skew angles, 30 ° of the inboard basils, tooth top is to high 8mm between the root platform; Groove between cutter tooth 5 and the awl tooth 6 is arc transition at root platform place, arc radius 4mm; Water hole 4 is arranged in bore bit steel body 1 head end.
In the above-described embodiments, when cutter tooth 5 is made the half cone profile of tooth, 45 ° of cutter tooth 5 cone angles, vertex of a cone arc radius 4mm, root diameter (RD) 11mm, 4 ° of outer skew angles, other parameter constant.
The utility model can be produced different-diameter, the serial composite flat tooth bits of different number of tiles, tooth combination, be applicable to all drilling engineerings, be not subjected to the restriction of type, lithology, eyelet diameter, especially in being fit to manufacture, major diameter bore bit and down-the-hold drill bit, cutter advances in hard, utmost point competent bed, has tangible comprehensive benefit.
Claims (5)
1. composite flat tooth bits, by bore bit steel body (1), ball profile of tooth cutting edge (2), sheet shape cutting edge (3) and water hole (4) are formed, the vertical dispersed placement of ball profile of tooth cutting edge (2) is at the interior ring of bore bit steel body (1) head end, sheet shape cutting edge (3) is vertical and be the outer shroud of radial arrangement in bore bit steel body (1) head end, water hole (4) is arranged in bore bit steel body (1) head end, it is characterized in that sheet shape cutting edge (3) is a special-shaped cutting edge, an integral body of forming by outer rim cutter tooth (5) and inboard cone tooth (6), between cutter tooth (5) and the awl tooth (6) groove is arranged, oblique angle of cutter tooth (5) outer rim, there is a basil inboard.
2. composite flat tooth bits as claimed in claim 1 is characterized in that the long 12-32mm of sheet shape cutting edge (3), wide 6-16mm, high 14-28mm; Cutter tooth 5 is spade teeth, tooth top arc radius 1-3mm, tooth top width 4-12mm, 2 °-5 ° at outer rim oblique angle, 25 ° of-45 ° of o of the inboard basil; Awl tooth (6) root diameter (RD) φ 6-16mm, 45 °-65 ° of cone angles, tooth top arc radius 2-6mm; Cutter tooth (5) and bore tooth (6) from tooth top to high 6-10mm the root platform.
3. composite flat tooth bits as claimed in claim 1 is characterized in that the long 12-32mm of sheet shape cutting edge (3), wide 6-16mm, high 14-28mm; Cutter tooth (5) is a half cone tooth, 35 °-55 ° of its cone angles, vertex of a cone arc radius 2-6mm, root diameter (RD) φ 6-16mm, 2 °-5 ° of outer skew angles; Awl tooth (6) root diameter (RD) φ 6-16mm, 45 °-65 ° of cone angles, vertex of a cone arc radius 2-6mm; Cutter tooth (5) and bore tooth (6) from tooth top to high 6-10mm the root platform.
4. composite flat tooth bits as claimed in claim 1 or 2 is characterized in that the long 18mm of sheet shape cutting edge (3), wide 11mm, high 17mm; Cutter tooth (5) tooth top arc radius 2mm, tooth top width 8mm, 4 ° at outer rim oblique angle, 30 ° of the inboard basils; Awl tooth (6) root diameter (RD) 11mm, 60 ° of cone angles, vertex of a cone arc radius 4mm; Cutter tooth (5) and awl tooth (6) are 8mm from tooth top to height the root platform.
5. as claim 1 or 3 described composite flat tooth bitses, it is characterized in that sheet shape cutting edge 3 long 18mm, wide 11mm, high 17mm; 45 ° of cutter tooth (5) cone angles, vertex of a cone arc radius 4mm, root diameter (RD) 11mm; Awl tooth (6) root diameter (RD) 11mm, 60 ° of cone angles, the flat footpath of vertex of a cone circular arc 4mm; Cutter tooth (5) and awl tooth (6) are 8mm from tooth top to height the root platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98242026 CN2356139Y (en) | 1998-09-29 | 1998-09-29 | Composite sheet tooth drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98242026 CN2356139Y (en) | 1998-09-29 | 1998-09-29 | Composite sheet tooth drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2356139Y true CN2356139Y (en) | 1999-12-29 |
Family
ID=33988667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98242026 Expired - Fee Related CN2356139Y (en) | 1998-09-29 | 1998-09-29 | Composite sheet tooth drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2356139Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104487647A (en) * | 2012-03-02 | 2015-04-01 | 国民油井华高有限公司 | Inner gauge ring drill bit |
-
1998
- 1998-09-29 CN CN 98242026 patent/CN2356139Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104487647A (en) * | 2012-03-02 | 2015-04-01 | 国民油井华高有限公司 | Inner gauge ring drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |