CN2709633Y - Milling roller with strengthed teeth - Google Patents
Milling roller with strengthed teeth Download PDFInfo
- Publication number
- CN2709633Y CN2709633Y CN 200420064986 CN200420064986U CN2709633Y CN 2709633 Y CN2709633 Y CN 2709633Y CN 200420064986 CN200420064986 CN 200420064986 CN 200420064986 U CN200420064986 U CN 200420064986U CN 2709633 Y CN2709633 Y CN 2709633Y
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- CN
- China
- Prior art keywords
- resistant alloy
- teeth
- tooth
- alloy layer
- gear wheel
- 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 - Lifetime
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Abstract
The utility model relates to a gear milling roller bit used for the field of rock drilling and petroleum well drilling, more specifically relates to a gear milling cone with a reinforced tooth structure. The utility model comprises a cone body and teeth which are arranged in the circumferential direction of the cone body, the surface of each tooth is welded with a wearing-resistant alloy layer, pits are arranged in the surface of the tooth at the interior of the wearing-resistant alloy layer, and the tooth is combined with the wearing-resistant alloy layer through the pits in the surface. The utility model has the advantages that the engagement degree between the surfaces of the teeth and the wearing-resistant alloy layers is enhanced through the pits arranged in the surfaces of the teeth of the gear milling cone, the welded wearing-resistant alloy layers are prevented from falling off, the abrasion resistance performance and the shock resistance performance of the gear milling cone are enhanced, thereby, the useful service life of the gear milling roller bit is enhanced; when the pits in the surfaces of the teeth are in conical cambered surfaces or arc surfaces, the processing of the pits can be carried out conveniently, the stress concentration of the surfaces of the teeth can be avoided when the welding is carried out, and simultaneously, the engagement degree between the welded wearing-resistant alloy layers and the surfaces of the teeth is further enhanced.
Description
Technical field
The utility model relates to a kind of mill teeth rock bit that is used for rock drilling and field of oil drilling, is specifically related to the structure-reinforced mill teeth gear wheel of tooth portion.
Background technology
Widely used rock bit is generally two kinds of mill teeth (also claiming steel-tooth) rock bit and insert bits in the oil and natural gas drilling well at present.Rock bit mainly is made up of bit leg and gear wheel.The characteristics of mill teeth rock bit are that the gear wheel blank forms with the superior alloy steel forging, go out two to five toothrow circles with method for metal working turning on gear wheel then, mill out tooth again on gear ring.The mill teeth rock bit mainly is suitable for creeping into of soft-medium hard formation.Tooth on the gear wheel is the primary element of rock bit direct fractured rock in drilling process, because rock has very high hardness and abrasiveness, therefore, even the gear wheel that superior alloy steel is made, the application life of its tooth is still very short.For addressing the above problem, apply weldering one deck antifriction alloy on the surface, tooth position of mill teeth gear wheel usually, the tooth of mill teeth gear wheel is significantly improved application life.Yet, along with further developing of modern drilling technology, under high drilling speed and high the pressure of the drill condition, in use for some time, the deposited weldering position of mill teeth gear wheel is easy to occur applying the problem that layer is peeled off by erosion, thereby influenced the anti-wear energy and the shock resistance of mill teeth gear wheel, reduced the Acceptable life of mill teeth rock bit.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of tooth portion that makes to apply the mill teeth gear wheel that the layer structure is strengthened at the deficiency of above-mentioned prior art existence, to improve the Acceptable life of mill teeth rock bit.
The utility model is that the technical scheme that technical problem adopted of the above-mentioned proposition of solution is: include cone body 2 and be laid in the circumferential tooth of cone body 3, dental surface applies and is welded with wear-resistant alloy layer 8, its difference is that the dental surface of wear-resistant alloy layer inner face is provided with pit 4, and tooth is provided with pit by the surface and combines with wear-resistant alloy layer.
Press such scheme, on side of described dental surface and/or crest top land, offer pit at least, and apply the weldering wear-resistant alloy layer on its surface; Described pit 4 can be circular cone cambered surface or arc surface, extends upward from the side 6 of tooth to connect to crest top land 5; The cutting stress surface of tooth when a described side is the gear wheel operation.
The beneficial effects of the utility model are by the surface at mill teeth gear wheel tooth pit to be set, strengthen the interlock degree of dental surface and wear-resistant alloy layer, prevent to apply coming off of weldering wear-resistant alloy layer, the anti-wear energy and the shock resistance of mill teeth gear wheel are enhanced, thereby improve the Acceptable life of mill teeth rock bit; When the dental surface pit is circular cone cambered surface or arc surface, not only can be convenient to the processing of pit, and the stress of dental surface is concentrated can avoid applying weldering the time, and the interlock degree that applies weldering wear-resistant alloy layer and dental surface is further strengthened.
Description of drawings
Fig. 1 is the cone structure figure of an embodiment of the utility model.
Fig. 2 is the stereogram of single tooth among embodiment of the utility model.
Fig. 3 is the elevation of single tooth among embodiment of the utility model.
Fig. 4 is the A-A sectional view among Fig. 3.
Fig. 5 is the vertical view of Fig. 3.
Fig. 6 is for applying the single tooth elevation that has welded wear-resistant alloy layer among embodiment of the utility model.
Fig. 7 is the B-B sectional drawing among Fig. 6.
Fig. 8 is the C-C sectional drawing among Fig. 6.
The specific embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing, include cone body 2, cone body is provided with 2～3 toothrow circles 1, every toothrow circle circumferentially be laid with tooth 3, the cross section of tooth is trapezoidal, each tooth includes crest top land 5, two sides 6 and two end faces 7, one at tooth is cut the pit 4 that offers a circular cone cambered surface on the stressed side, circular cone cambered surface pit 6 extends upward and is through to crest top land 5 from the side, weldering wear-resistant alloy layer 8 is all applied on each surface at tooth, the thickness of wear-resistant alloy layer is 1～5 millimeter, thick 1～2 millimeter than other face of the antifriction alloy layer thickness that wherein is provided with the pit side.
Claims (6)
1, a kind of mill teeth gear wheel of strengthed teeth, include cone body (2) and be laid in the circumferential tooth of cone body (3), dental surface applies and is welded with wear-resistant alloy layer (8), the dental surface that it is characterized in that the wear-resistant alloy layer inner face is provided with pit (4), and tooth is provided with pit by the surface and combines with wear-resistant alloy layer.
2,, it is characterized in that at least on side of described dental surface and/or crest top land, offering pit (4), and apply weldering wear-resistant alloy layer (8) on its surface by the mill teeth gear wheel of the described strengthed teeth of claim 1.
3, by the mill teeth gear wheel of claim 1 or 2 described strengthed teeths, it is characterized in that described pit (4) can be circular cone cambered surface or arc surface, extend upward from the side (6) of tooth and connect to crest top land (5).
4,, it is characterized in that the cutting stress surface of tooth when described side is the gear wheel operation by the mill teeth gear wheel of the described strengthed teeth of claim 2.
5, by the mill teeth gear wheel of claim 1 or 2 described strengthed teeths, it is characterized in that all applying weldering wear-resistant alloy layer (8) on each surface of tooth, the thickness of wear-resistant alloy layer is 1～5 millimeter.
6, by the mill teeth gear wheel of the described strengthed teeth of claim 5, thick 1～2 millimeter of the antifriction alloy layer thickness that it is characterized in that being provided with the pit side than other face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420064986 CN2709633Y (en) | 2004-06-21 | 2004-06-21 | Milling roller with strengthed teeth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420064986 CN2709633Y (en) | 2004-06-21 | 2004-06-21 | Milling roller with strengthed teeth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2709633Y true CN2709633Y (en) | 2005-07-13 |
Family
ID=34852250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420064986 Expired - Lifetime CN2709633Y (en) | 2004-06-21 | 2004-06-21 | Milling roller with strengthed teeth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2709633Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408091B (en) * | 2008-11-26 | 2012-07-25 | 江汉石油钻头股份有限公司 | Steel teeth roller bit |
| CN108222845A (en) * | 2018-04-09 | 2018-06-29 | 成都百施特金刚石钻头有限公司 | The cyclic annular cutting alloy tooth of drill and petroleum extraction tools |
-
2004
- 2004-06-21 CN CN 200420064986 patent/CN2709633Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408091B (en) * | 2008-11-26 | 2012-07-25 | 江汉石油钻头股份有限公司 | Steel teeth roller bit |
| CN108222845A (en) * | 2018-04-09 | 2018-06-29 | 成都百施特金刚石钻头有限公司 | The cyclic annular cutting alloy tooth of drill and petroleum extraction tools |
| CN108222845B (en) * | 2018-04-09 | 2024-04-26 | 成都百施特金刚石钻头有限公司 | Annular cutting alloy tooth for drilling and production tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140621 Granted publication date: 20050713 |