CN203835274U - Air hammer drill bit outer circle arc tooth - Google Patents
Air hammer drill bit outer circle arc tooth Download PDFInfo
- Publication number
- CN203835274U CN203835274U CN201320853012.XU CN201320853012U CN203835274U CN 203835274 U CN203835274 U CN 203835274U CN 201320853012 U CN201320853012 U CN 201320853012U CN 203835274 U CN203835274 U CN 203835274U
- Authority
- CN
- China
- Prior art keywords
- corona
- tooth
- work
- subtask
- drill bit
- 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 an air hammer drill bit outer circle arc tooth which comprises a work tooth crown (1) and a mounting bottom (2). The air hammer drill bit outer circle arc tooth is characterized in that the work tooth crown (1) is provided with a main work tooth crown body (4) and a sub work tooth crown body (3), an arc curve (6) is located at the junction of the main work tooth crown body (4) and the sub work tooth crown body (3), the outer contour line of the main work tooth crown body (4) comprises an inner edge (8) and the arc curve (6), the outer contour line of the sub work tooth crown body (3) comprises an outer edge (7) and the arc curve (6), the inner edge (8) and the outer edge (7) are equally divided by a front end (11) and a rear end (12) respectively, the mounting bottom (2) is of a cylindrical structure, slopes (5) are arranged on the two sides of the bottom of the mounting bottom, and the central axis (9) of the tooth coincides with the central axis of the cylindrical structure. The air hammer drill bit outer circle arc tooth overcomes the defects that according to existing spherical teeth and conical teeth, side teeth of a drill bit are excessively abraded, and the damaging effect is not good.
Description
Technical field
The utility model relates to mechanical field, particularly a kind of hammer drilling bit outer ring camber tooth.
Background technology
Along with exploration and development is more and more toward the development of deep hardpan, air rotary percussion drilling relies on it in the high rate of penetration of deep hardpan, protection reservoir, hole deviation, to control and well, effectively administer the technical characterstic of pernicious leakage, has obtained application more and more widely.Hammer drilling bit tooth is as the direct contact component of air hammer and rock, and the quality of its performance directly affects the efficiency of breaking rock of rotary percussion drilling.
The hard-metal insert that hammer drilling bit is inlayed mainly contains two kinds, ball-type tooth and tapered tooth: the rock fracture in dynamic indentation ability of ball-type tooth is general, but abrasion resistance is better; Tapered tooth is powerful compared with ball-type tooth rock fracture in dynamic indentation performance, but abrasion resistance is relatively poor, at hardpan, excessive wear easily occurs and even fractures.
The tooth wear of hammer drilling bit is mainly the radial cutting loss of the pressure of the drill effect lower teeth and rock, because the displacement of outer ring tooth is larger than the displacement of inner ring tooth, so the outer ring tooth of hammer drilling bit also should possess extremely strong abrasion resistance when guaranteeing rock breaking capacity.
Existing hammer drilling bit outer ring tooth is all generally to adopt ball-type tooth or tapered tooth, two kinds of flute profiles respectively have superiority in abrasion resistance and rock fracture in dynamic indentation performance, but all can not meet the technical requirements that outer ring tooth needs abrasion resistance and rock breaking capacity to take into account, existing ball-type, the tooth excessive wear of tapered outer ring, fracture often occur, the frequent trips causing thus, has a strong impact on bit speed and drilling cost.Therefore be badly in need of a kind of novel not only wear-resisting but also efficient outer ring tooth of development.
Utility model content
In order to overcome the above-mentioned shortcoming of prior art, the purpose of this utility model is the drill bit heel teeth excessive wear that overcomes existing hemi-spherical ended shape insert, conical tooth existence, and the defect that execution is not good, provides a kind of hammer drilling bit outer ring camber tooth.
The utility model solves the technical scheme that its technical problem adopts: a kind of hammer drilling bit outer ring camber tooth, comprise work corona and bottom is installed, wherein: described work corona is provided with main work corona and subtask corona, arc curve is positioned at the intersection of main work corona and subtask corona, the outer contour of main work corona comprises inner edge and arc curve, the outer contour of subtask corona comprises outer rim and arc curve, inner edge and outer rim are divided equally into two sections by front end and rear end respectively, it is cylindrical structure that bottom is installed, both sides, bottom are designed with inclined-plane, tooth center axis overlaps with cylindrical axis.
As further improvement of the utility model: the straight line that the leading portion of described work corona is connected with rear end and central axis intersect and form central plane A-A, on central plane A-A, the cross section of work corona is asymmetrical locally ellipticity shape face, in the plane intersecting vertically with central plane A-A, the cross section of work corona is symmetrical part-circular face.
As further improvement of the utility model: the inner edge of described main work corona rises to camber curve gradually from front end always, the outer rim of subtask corona smoothly declines to rear end from arc curve always.
Compared with prior art, the beneficial effects of the utility model are: the feature of ball-type tooth depth abrasion resistance that the utility model is integrated and tapered tooth depth rock fracture in dynamic indentation performance, inlay the drill bit of hammer drilling bit outer ring camber tooth, will there is the feature of high application life, high drilling efficiency.
Accompanying drawing explanation
Fig. 1 is elevation of the present utility model.
Fig. 2 is lateral view of the present utility model.
Fig. 3 is top view of the present utility model.
Fig. 4 is the cross section view of the utility model A-A face.
Fig. 5 is the cross section view of the utility model B-B face.
Fig. 6 is the cross section view of the utility model C-C face.
Fig. 7 is the cross section view of the utility model D-D face.
The specific embodiment
Existing accompanying drawings and embodiment further illustrate the utility model:
With reference to figure 1, Fig. 2 and Fig. 3, a kind of hammer drilling bit outer ring camber tooth, comprise work corona 1, with installation bottom 2, wherein: described work corona 1 is provided with main work corona 4 and subtask corona 3, arc curve 6 is positioned at the intersection of main work corona 4 and subtask corona 3, the outer contour of main work corona 4 comprises inner edge 8 and arc curve 6, the outer contour of subtask corona 3 comprises outer rim 7 and arc curve 6, inner edge 8 is divided equally into two sections by front end 11 and rear end 12 respectively with outer rim 7, it is cylindrical structure that bottom 2 is installed, both sides, bottom are designed with inclined-plane 5, tooth center axis 9 overlaps with cylindrical axis.
As further improvement of the utility model: the straight line that the leading portion 11 of described work corona 1 is connected with rear end 12 and central axis 9 intersect and form central plane A-A, on central plane A-A, the cross section of work corona 1 is asymmetrical ellipse, in the plane intersecting vertically with central plane A-A, the cross section of work corona 1 is symmetrical circle.
The straight line that the leading portion 11 of described work corona 1 is connected with rear end 12 and central axis 9 intersect formation central plane A-A, on central plane A-A, the cross section of work corona 1 is asymmetrical locally ellipticity shape face, in the plane intersecting vertically with central plane A-A, the cross section of work corona 1 is symmetrical part-circular face.
The inner edge 8 of described main work corona 4 rises to camber curve 6 from front end 11 always gradually, and the outer rim 7 of subtask corona 3 is from arc curve 6 12 smoothly declines always to rear end.
Detailed description of the present utility model:
A kind of hammer drilling bit outer ring camber tooth is comprised of work corona 1 and installation bottom 2, arc curve 6 is positioned at the intersection of main work corona 4 and subtask corona 3, compared to ball-type tooth top contouring face 10, camber hard-metal insert has increased the volume of main work corona 4, has reduced the volume of subtask corona 3.The outer contour of main work corona 4 comprises inner edge 8 and camber curve 6, the outer contour of subtask corona 3 comprises outer rim 7 and camber curve 6, inner edge 8 is divided equally into two sections by front end 11 and rear end 12 respectively with outer rim 7, the feature of inner edge 8 is to rise gradually to camber curve 6 from front end 11 always, and the feature of outer rim 7 is from camber curve 6 12 smoothly declines always to rear end.It is cylindrical structure that bottom 2 is installed, and both sides, bottom are designed with inclined-plane 5.Tooth center axis 9 overlaps with cylindrical axis, connects front end 11 and intersects formation central plane A-A with straight line and the central axis 9 of rear end 12.On central plane A-A, the section feature of work corona 1 is asymmetrical locally ellipticity shape face, and in the arbitrary plane intersecting vertically with central plane A-A, the section feature of (as B-B, C-C, D-D) work corona 1 is symmetrical ball-type.It is cylindrical structure that bottom 2 is installed, and bottom design has inclined-plane 5, is convenient to tooth and is fixed on best operational position.
When tooth revolution cutting, main work corona 4 laminating rocks, bear most the pressure of the drill and impact cutting reaction force, because the more unidimensional ball-type tooth top contouring face 10 of main work corona 4 has adopted the design that increases volume, and the section feature of work corona 1 is all symmetrical ball-type in the arbitrary plane that central plane A-A intersects vertically, so its abrasion resistance is better than unidimensional ball tooth and cone tooth.The more unidimensional ball-type tooth top contouring face 10 of subtask corona 3 has adopted the design of cutting down volume, the section feature of corona 1 of working on central plane A-A is asymmetrical camber, during axial impact rock, the camber tooth being in tilted layout has the effect of the pinnacle rock fracture in dynamic indentation that is similar to tapered tooth, its broken lithology can be better than unidimensional ball-type tooth, substantially approaches tapered tooth.
In sum; those of ordinary skill in the art reads after the utility model file; according to the technical solution of the utility model and technical conceive, without creative mental labour, make other various corresponding conversion scheme, all belong to the scope that the utility model is protected.
Claims (3)
1. a hammer drilling bit outer ring camber tooth, comprise work corona (1) and bottom (2) is installed, it is characterized in that: described work corona (1) is provided with main work corona (4) and subtask corona (3), arc curve (6) is positioned at the intersection of main work corona (4) and subtask corona (3), the outer contour of main work corona (4) comprises inner edge (8) and arc curve (6), the outer contour of subtask corona (3) comprises outer rim (7) and arc curve (6), inner edge (8) is divided equally into two sections by front end (11) and rear end (12) respectively with outer rim (7), it is cylindrical structure that bottom (2) is installed, both sides, bottom are designed with inclined-plane (5), tooth center axis (9) overlaps with cylindrical axis.
2. a kind of hammer drilling bit according to claim 1 outer ring camber tooth, it is characterized in that: the straight line that the leading portion (11) of described work corona (1) is connected with rear end (12) and central axis (9) intersect formation central plane (A-A), on central plane (A-A), the cross section of work corona (1) is asymmetrical locally ellipticity shape face, in the plane intersecting vertically with central plane (A-A), the cross section of work corona (1) is symmetrical part-circular face.
3. a kind of hammer drilling bit according to claim 1 outer ring camber tooth, it is characterized in that: the inner edge (8) of described main work corona (4) rises to camber curve (6) from front end (11) always gradually, from arc curve (6), to rear end, (12) smoothly decline the outer rim (7) of subtask corona (3) always.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320853012.XU CN203835274U (en) | 2013-12-23 | 2013-12-23 | Air hammer drill bit outer circle arc tooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320853012.XU CN203835274U (en) | 2013-12-23 | 2013-12-23 | Air hammer drill bit outer circle arc tooth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203835274U true CN203835274U (en) | 2014-09-17 |
Family
ID=51513131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320853012.XU Expired - Fee Related CN203835274U (en) | 2013-12-23 | 2013-12-23 | Air hammer drill bit outer circle arc tooth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203835274U (en) |
-
2013
- 2013-12-23 CN CN201320853012.XU patent/CN203835274U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20141223 |
|
| EXPY | Termination of patent right or utility model |