CN203471251U - Cold rolling device of drill pipe joint thread - Google Patents
Cold rolling device of drill pipe joint thread Download PDFInfo
- Publication number
- CN203471251U CN203471251U CN201320545489.1U CN201320545489U CN203471251U CN 203471251 U CN203471251 U CN 203471251U CN 201320545489 U CN201320545489 U CN 201320545489U CN 203471251 U CN203471251 U CN 203471251U
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- Prior art keywords
- support
- cold rolling
- thread
- hydraulic
- rolling device
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- Expired - Fee Related
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Abstract
The utility model relates to a thread cold rolling device and discloses a cold rolling device of a drill pipe joint thread. The cold rolling device comprises a rolling wheel, a mandrel, a support, a hydraulic device, a pressure gage, a pressure device, and a hydraulic hole. The mandrel penetrates through a center of the rolling wheel and is fixed on the support. The support is connected with the hydraulic device through the hydraulic hole. The pressure gage is arranged on the hydraulic device and is fixed with the support. The pressure device is connected with the hydraulic device. An edge of the support close to one side of the rolling wheel is of an arc structure. The arc structure matches with an arc of a bottom of the drill pipe joint thread, so that the cold rolling device is convenient to penetrate through an inner wall of a joint. By the aid of the cold rolling device, uniformity of a hardened layer is guaranteed, fatigue resistance and wear-resistance of the thread are improved, service life of the drill pipe joint is prolonged, and cost is reduced.
Description
Technical field
The utility model relates to a kind of cold rolling device, specifically a kind of cold rolling device that oil tool joint thread is processed.
Background technology
The two ends of the drilling rod that oil drilling is used be each to being welded with a male joint and female joint, male joint and female joint are that the screw thread that is provided with by self screws and links together.At present, traditional tool joint with screw thread, because the arc transition of the bottom of thread is less, it is under arms in process, the bottom of screw thread exists very large stress and concentrates.And under complicated alternate load, thread root usually can produce fatigue crack and lose efficacy, reduced the service life of tool joint, thereby increased cost.
Summary of the invention
The purpose of this utility model is to provide a kind of cold rolling device of tool joint thread, and this device can extend the service life of tool joint, can solve the problem in background technology.
In order to solve the problems of the technologies described above adopted technical scheme, be: a kind of cold rolling device of tool joint thread, comprise rolling wheel, mandrel, support, hydraulic means, Pressure gauge and pressue device, it is characterized in that, also comprise hydraulic pressure hole, mandrel is fixed on support through rolling wheel center; Support is connected by hydraulic pressure hole with hydraulic means; Pressure gauge is arranged on hydraulic means and with support and fixes; Pressue device is connected with hydraulic means; The edge of the support of close rolling wheel one side is arc-shaped structure.
The utility model is by mating the edge designs structure in the arc-shaped of the support near rolling wheel one side with the circular arc of tool joint inwall, prevent from damaging, and go deep into quickly and easily the inwall of tool joint, guarantee steadily naturally to contact with the circular arc of thread root, the circular arc of double thread root carries out cold pressing treatment exactly, guarantees that hardened layer is even, thereby improves screw thread fatigue resistance and anti-wear performance, in the service life that has extended tool joint, reduced cost.
Accompanying drawing explanation
Fig. 1, structure chart of the present utility model;
Fig. 2, the schematic cross-section at A place in Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in detail.
As shown in Figure 1, for structure chart of the present utility model, a cold rolling device for tool joint thread, this cold rolling device comprises draws together rolling wheel 1, mandrel 2, support 3, hydraulic means 4, Pressure gauge 5, pressue device 6, hydraulic pressure hole 7, and mandrel 2 is fixed on support 3 through rolling wheel 1 center; Support 3 is connected by hydraulic pressure hole 7 with hydraulic means 4; Pressure gauge 5 is arranged on hydraulic means 4 and with support 3 and fixes; Pressue device 6 is connected with hydraulic means 4.As shown in Figure 2, the edge at the support 3 near rolling wheel 1 one sides is arc-shaped structure 9.
The specific embodiment: cold rolling device of the present utility model is fixed on lathe by screw by fixed mount, after tool joint thread turning machines, the arc-shaped structure 9 of support 3 edges is goed deep into tool joint thread region, at this moment restart cold rolling device, tool joint thread root is implemented to cold pressing treatment.The cold pressing treatment of utilizing the utility model to implement, produces hardened layer at tool joint thread root, thereby has improved the fatigue resistance of thread root, has reduced the generation of tool joint failure accidents, has reduced cost.
Claims (1)
1. the cold rolling device of a tool joint thread, comprise rolling wheel (1), mandrel (2), support (3), hydraulic means (4), Pressure gauge (5) and pressue device (6), it is characterized in that: also comprise hydraulic pressure hole (7), mandrel (2) is fixed on support (3) through rolling wheel (1) center; Support (3) is connected by hydraulic pressure hole (7) with hydraulic means (4); It is upper and fixing with support (3) that Pressure gauge (5) is arranged on hydraulic means (4); Pressue device (6) is connected with hydraulic means (4); The edge of the support (3) of close rolling wheel (1) one side is set to arc-shaped structure (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320545489.1U CN203471251U (en) | 2013-09-04 | 2013-09-04 | Cold rolling device of drill pipe joint thread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320545489.1U CN203471251U (en) | 2013-09-04 | 2013-09-04 | Cold rolling device of drill pipe joint thread |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203471251U true CN203471251U (en) | 2014-03-12 |
Family
ID=50219660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320545489.1U Expired - Fee Related CN203471251U (en) | 2013-09-04 | 2013-09-04 | Cold rolling device of drill pipe joint thread |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203471251U (en) |
-
2013
- 2013-09-04 CN CN201320545489.1U patent/CN203471251U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20170904 |