CN201023120Y - Thin and long rod tube end stamping and forging front-middle frequency two-stage heating device - Google Patents
Thin and long rod tube end stamping and forging front-middle frequency two-stage heating device Download PDFInfo
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- CN201023120Y CN201023120Y CNU2007201038904U CN200720103890U CN201023120Y CN 201023120 Y CN201023120 Y CN 201023120Y CN U2007201038904 U CNU2007201038904 U CN U2007201038904U CN 200720103890 U CN200720103890 U CN 200720103890U CN 201023120 Y CN201023120 Y CN 201023120Y
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- upsetting
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Abstract
A medium-frequency two-stage heating device for end portions of elongated rods and pipes, which relates to the control and realization of heating temperature of medium-frequency heating before end portion upsetting of sucker rods, oil pipes, and drill rods in oil and machinery field, comprises a first heating furnace (1), a first medium-frequency heating coil (2), a second medium-frequency heating furnace (4), a second medium-frequency heating coil (5), and the like. The first medium-frequency heating coil (2) is arranged on the first heating furnace (1), the second medium-frequency heating coil (5) is arranged on the second medium-frequency heating furnace (4), and cooling mechanisms (3) are separately arranged outside the first heating furnace (1) and the second medium-frequency heating furnace (4). Due to the improvement of the medium-frequency heating coils, upsetting qualities of the products like oil well pipes are evidently improved. Due to the uniform heating temperature and gradient heating, the fluidity of the metal in upsetting process is coincident with the molding elements, thereby guaranteeing molding quality in upsetting process, reducing upsetting defect, and decreasing rejection rate.
Description
Technical field
The control of heating-up temperature that the utility model relates to petroleum machinery field sucker rod, oil pipe, drilling rod when adopting heating in medium frequency before the upsetting of end and the technology of realization specifically, are intermediate frequency two-stage heaters before the upsetting of a kind of elongate rod tube end.
Background technology
Along with the continuous development of China Petroleum, the performance demands of sucker rod, oil pipe, drilling rod etc. is being improved constantly.For improving the switching performance at pipe end place, be important measures at pipe end implementation external upset (EU) or interior thickening (its wall thickness in pipe end section being increased) in the end upsetting.Before forging, must partly heat, to reach needed temperature of when distortion forging deformation.The inhomogeneity control of firing rate, heat time heating time, heating-up temperature influences the key factor of upsetting quality.Present domestic sucker rod, oil pipe, drilling rod manufacturer, the following problem of ubiquity with heating in medium frequency the time:
1, effective deformation portion temperature gradient irrational distribution, the end region temperature of heating is higher than 30～50 ℃ of heating afterbodys, like this when forging in the heating region near slow with respect to the end of the flowing velocity of middle afterbody metal, because in deformation process, metal always moves towards the direction of minimum drag, thereby afterbody is full of deficiency in causing in the upsetting forming process, and produces folding in the end.
2, heating and temperature control inaccuracy, instability local produce burning, overheated even heating-up temperature is not enough.
Summary of the invention
The purpose of this utility model is to provide the upsetting of a kind of elongate rod tube end preceding intermediate frequency two-stage heater, by improvement to the intermediate frequency heater coil, make type products forging quality such as oil well pipe obtain tangible improvement: because heating-up temperature is even, and realization gradient-heated, make the flowability of metal in the upsetting process meet forming principle, guarantee Forming Quality in the upsetting process, reduced the upsetting defective, reduced percent defective.
The utility model is achieved in that and comprises heating furnace 1, heating in medium frequency coil 2, cooling body 3, No. two heating in medium frequency stoves 4, No. two heating in medium frequency coils 5, left and right adjusting dolly 6, front and back feeding carriage 7, No. one heating furnace 1 is provided with heating in medium frequency coil 2 No. one, No. two heating in medium frequency stove 4 is provided with heating in medium frequency coil 5 No. two, cooling body 3 is separately positioned on the outside of heating furnace 1, No. two heating in medium frequency stoves 4, and the bottom of this device is separately installed with left and right adjusting dolly 6, front and back feeding carriage 7.
Advantage of the present utility model is:
By improvement, make type products forging qualities such as oil well pipe obtain tangible improvement to the intermediate frequency heater coil:
Because heating-up temperature is even, and realizes gradient-heated, make the flowability of metal in the upsetting process meet forming principle, guaranteed Forming Quality in the upsetting process, reduced the upsetting defective, reduced percent defective.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
The specific embodiment
As shown in Figure 1, form by heating furnace 1, heating in medium frequency coil 2, cooling body 3, No. two heating in medium frequency stoves 4, No. two heating in medium frequency coils 5, left and right adjusting dolly 6, front and back feeding carriages 7, No. one heating furnace 1 is provided with heating in medium frequency coil 2 No. one, No. two heating in medium frequency stove 4 is provided with heating in medium frequency coil 5 No. two, cooling body 3 is separately positioned on the outside of heating furnace 1, No. two heating in medium frequency stoves 4, and the bottom of this device is separately installed with left and right adjusting dolly 6, front and back feeding carriage 7.
Frequency Induction Heating adopts 2 passage mode of heatings, heating furnace 1, No. two heating in medium frequency stoves 4 be corresponding respectively installs heating in medium frequency coil 2, No. two heating in medium frequency coils 5 are equipped with a platform independent intermediate frequency power supply, can guarantee the heating-up temperature gradient, every heating furnace all has temp sensing function.
No. one heating furnace 1 is a preheating furnace, when heat time heating time to or workpiece reached when setting heating-up temperature the workpiece rollback;
After No. two heating in medium frequency stoves 4 are located at heating furnace 1, pipe end through heating furnace 1 heating after, in No. two heating in medium frequency stoves 4, heat once more and reach upsetting after the final heating-up temperature;
4, every time heater is equipped with a platform independent intermediate frequency power supply and can guarantees the heating-up temperature precision.
Adopt twice heating, wherein: one-level heating is carried out the steel pipe high density with the inductor of 250kw and is heated (steel pipe pre-heating temperature elevation to 700～850 ℃), the secondary heating is carried out temperature with 200kw and is evenly heated, heating schedule is: intensification, expansion, to temperature (1180 ℃), steel pipe after temperature is sent into horizontal forging and upsetting machine, has avoided the uneven problem of temperature heating so fully.Guaranteed follow-up upsetting quality.
Different steel pipes need different heated lengths, for this reason, are provided with left and right adjusting dolly 6, front and back feeding carriage 7, according to technological parameter, regulate left and right adjusting dolly 6, front and back feeding carriage 7 advances in the scope that requires automatically with retreat (feeding and the material returned).
Claims (1)
1. intermediate frequency two-stage heater before the upsetting of elongate rod tube end, comprise a heating furnace (1), a heating in medium frequency coil (2), cooling body (3), No. two heating in medium frequency stoves (4), No. two heating in medium frequency coils (5), left and right adjusting dolly (6), front and back feeding carriage (7), it is characterized in that: a heating furnace (1) is provided with a heating in medium frequency coil (2), No. two heating in medium frequency stoves (4) are provided with No. two heating in medium frequency coils (5), cooling body (3) is separately positioned on a heating furnace (1), the outside of No. two heating in medium frequency stoves (4), the bottom of this device are separately installed with left and right adjusting dolly (6), front and back feeding carriage (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201038904U CN201023120Y (en) | 2007-03-20 | 2007-03-20 | Thin and long rod tube end stamping and forging front-middle frequency two-stage heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201038904U CN201023120Y (en) | 2007-03-20 | 2007-03-20 | Thin and long rod tube end stamping and forging front-middle frequency two-stage heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201023120Y true CN201023120Y (en) | 2008-02-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201038904U Expired - Fee Related CN201023120Y (en) | 2007-03-20 | 2007-03-20 | Thin and long rod tube end stamping and forging front-middle frequency two-stage heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201023120Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852552A (en) * | 2010-03-12 | 2010-10-06 | 浙江金洲管道科技股份有限公司 | Material conveying mechanism in production of plastic-lined steel pipe by medium frequency heating |
| CN103386451A (en) * | 2012-05-09 | 2013-11-13 | 雷帮荣 | Forming process of large-diameter piston plug, step shaft or oil cylinder and processing equipment thereof |
| CN104480279A (en) * | 2014-11-13 | 2015-04-01 | 中国石油天然气集团公司 | Two-step induction heater of bent tube for oil gas pipeline production, and method thereof |
| CN105772613A (en) * | 2016-01-14 | 2016-07-20 | 中国重型机械研究院股份公司 | Pipe end thickening device and method adopting seven times of heating and three passes of upsetting |
| CN109926531A (en) * | 2019-04-12 | 2019-06-25 | 中国石油集团渤海石油装备制造有限公司 | Titanium alloy drill rod pipe end upsetting method and processing unit (plant) |
-
2007
- 2007-03-20 CN CNU2007201038904U patent/CN201023120Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852552A (en) * | 2010-03-12 | 2010-10-06 | 浙江金洲管道科技股份有限公司 | Material conveying mechanism in production of plastic-lined steel pipe by medium frequency heating |
| CN103386451A (en) * | 2012-05-09 | 2013-11-13 | 雷帮荣 | Forming process of large-diameter piston plug, step shaft or oil cylinder and processing equipment thereof |
| CN103386451B (en) * | 2012-05-09 | 2015-07-08 | 雷帮荣 | Forming process of large-diameter piston plug, step shaft or oil cylinder and processing equipment thereof |
| CN104480279A (en) * | 2014-11-13 | 2015-04-01 | 中国石油天然气集团公司 | Two-step induction heater of bent tube for oil gas pipeline production, and method thereof |
| CN105772613A (en) * | 2016-01-14 | 2016-07-20 | 中国重型机械研究院股份公司 | Pipe end thickening device and method adopting seven times of heating and three passes of upsetting |
| CN109926531A (en) * | 2019-04-12 | 2019-06-25 | 中国石油集团渤海石油装备制造有限公司 | Titanium alloy drill rod pipe end upsetting method and processing unit (plant) |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080220 |