CN202387729U - Stationary core rod for carrying out hot rolling on seamless steel tube - Google Patents
Stationary core rod for carrying out hot rolling on seamless steel tube Download PDFInfo
- Publication number
- CN202387729U CN202387729U CN2011204842354U CN201120484235U CN202387729U CN 202387729 U CN202387729 U CN 202387729U CN 2011204842354 U CN2011204842354 U CN 2011204842354U CN 201120484235 U CN201120484235 U CN 201120484235U CN 202387729 U CN202387729 U CN 202387729U
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- core rod
- plug
- steel tube
- seamless steel
- stationary core
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Abstract
The utility model belongs to the technical field of hot rolling of a seamless steel tube with an ultra-small diameter and relates to a stationary core rod for carrying out hot rolling on the seamless steel tube. The stationary core rod mainly comprises a core rod head (4) and a core rod body (6); the core rod head (4) is provided with a reducing section and an equal diameter section from back to forth; the reducing section consists of a plurality of sections of cone frustum bodies; and the equal diameter section is a cylinder. According to the stationary core rod provided by the utility model, the reducing section and the equal diameter section of the core rod head which is arranged in a hole cavity formed by three rollers respectively correspond to a cone-frustum-shaped cavity and a round cavity formed by the rollers. The appearance shape of the core rod head and the shape of the hole cavity formed by the three rollers are the same, so as to ensure the precision of a rolled steel tube. Therefore, hot rolling of the extra-small seamless steel tube is realized. A cooling structure of the stationary core rod is used for cooling the rollers and the core rod in a rolling process, so as to ensure smooth continuous hot rolling. The core rod head can be replaced, so that the production cost of the core rod is reduced.
Description
Technical field
The utility model belongs to the special minor diameter seamless steel tube technical field of hot rolling, relates to a kind of stationary core rod that is used for hot rolled seamless steel tube.
Background technology
Present domestic heating rolling seamless steel pipe all is that the rolling sizing section at steel pipe adds plug, and the rolling mode of employing is to adopt retained mandrel and floating core rod, promptly adopts isodiametric plug; The plug that penetrates hollow billet moves forward in the operation of rolling, and plug passes the whole rolling frame usually, and stretches out about 800-1000mm; When the diameter of steel pipe, endoporus too hour; Receive the restriction of mandril strength, make add plug heating rolling minor diameter seamless steel tube become impossible, so the seamless steel pipe that present domestic hot rolled seamless steel tube all is rolling major diameter (more than the 76mm); The production of minor diameter seamless steel tube is mainly formed by cold rolling; All need repeatedly pickling, phosphatization, saponification in process of production, this a few procedure severe contaminations water source, country has ordered and has forbidden.But; The demand of minor diameter seamless steel tube but constantly increases on the domestic and international market; In order to solve a difficult problem that adds the mandrel rolling hot rolling minor diameter seamless steel tube, the applicant has proposed the Processes and apparatus of the special minor diameter seamless steel tube of a kind of stationary core rod hot rolling, and wherein related mandrel structure is not for moving axially; Only do the structure of passive rotation, solved a difficult problem that adds the mandrel rolling hot rolling minor diameter seamless steel tube.
Summary of the invention
The purpose of the utility model is to propose a kind of stationary core rod that is used for hot rolled seamless steel tube, and stationary core rod is not moved axially, and only does passive rotation, solves a difficult problem that adds the mandrel rolling hot rolling minor diameter seamless steel tube.
The utility model adopts following technical scheme to be for accomplishing the foregoing invention task:
A kind of stationary core rod that is used for hot rolled seamless steel tube, said stationary core rod mainly comprises core head and mandrel body; Described core head has by back to preceding undergauge section and equal diameter section; Described undergauge section is made up of multistage circular cone stage body; Said equal diameter section is a cylinder.
Described plug has middle cavities; Be provided with the cooling chamber that is used to cool off plug in the middle cavities of plug, be provided with flange in the rear end of said mandrel body, described flange is connected with the ring flange of mandrel trolley rotating shaft termination, constitutes the structure of plug with the rotating shaft rotation of mandrel trolley; The middle part of said rotating shaft has cavity.
The middle cavities that said plug had extends the undergauge section of core head forward; Be provided with the flow pipe that is used to cool off plug in the middle cavities of plug; One end of said flow pipe is communicated with cooling water source, water pump through the cavity that rotating shaft had, and the cavity between flow pipe and the mandrel body inwall constitutes exhalant canal.
The middle cavities that said plug had is a through-hole structure; Cavities runs through whole plug promptly; The middle cavities of plug is as the cooling chamber of cooling plug; Described cooling chamber is communicated with cooling water source, water pump through the cavity that rotating shaft had, and described cooling chamber not only is an intake tunnel but also be exhalant canal.
Described mandrel body and core head are dismountable minute body structure.
A kind of stationary core rod that is used for hot rolled seamless steel tube that the utility model proposes; Truncated cone cavity and the circular cavity with roll formation is corresponding respectively to be positioned at its undergauge section of core head and the equal diameter section of the vestibule that three rolls form; Its outer shape is consistent with three formed vestibule shapes of roll; Guarantee the rolled steel tube precision, made the special little seamless steel pipe of hot rolling become possibility, saved operations such as the pickling in the Cold Drawing Process, phosphatization, saponification; Reduced energy consumption, reduced pollution, practiced thrift cost; The cooling structure that stationary core rod had breaker roll and plug in the operation of rolling cool off, and have guaranteed carrying out smoothly of continuously hot rolling; Core head is replaceable, has reduced the production cost of plug.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the another kind of structural representation of the utility model.
Among the figure: 1, water chamber, 2, delivery port, 3, flow pipe, 4, core head, 5, flange, 6, mandrel body, 7, rotating shaft, 8, mandrel trolley, 9, support ring, 10, welded stub connection.
Specific embodiments
The utility model is explained that still, the utility model is not limited to these instances in conjunction with accompanying drawing and specific embodiment.
As shown in Figure 1, a kind of stationary core rod that is used for hot rolled seamless steel tube, said stationary core rod mainly comprise core head 4 and mandrel body 6; Among this embodiment, described plug is dismountable minute body structure, and being threaded by mandrel body 6 and core head 4 constitutes; Described core head 4 has by back to preceding undergauge section and equal diameter section; Described undergauge section has the circular cone stage body of multistage undergauge; Said equal diameter section is a cylinder, is used for required rolling hollow forging tube reducing is subtracted wall; The undergauge section of said core head and equal diameter section are corresponding with truncated cone cavity and the circular cavity that roll forms respectively, and its outer shape is consistent with three formed vestibule shapes of roll, has guaranteed the rolled steel tube precision; Described plug has middle cavities; Be provided with the cooling chamber that is used to cool off plug in the middle cavities of plug, be provided with flange 5 in the rear end of said mandrel body 6, described flange 5 is connected with the ring flange of mandrel trolley rotating shaft 7 terminations, constitutes the structure of plug with rotating shaft 7 rotations of mandrel trolley 8; The middle part of said rotating shaft 7 has cavity; Among this embodiment; The middle cavities that said plug had extends the undergauge section of core head 4 forward, is provided with the flow pipe 3 that is used to cool off plug in the middle cavities of plug, and an end of said flow pipe 3 is communicated with cooling water source, water pump through the cavity that rotating shaft 7 is had; Be said flow pipe 3 an end be positioned at the welded stub connection 10 that 7 on rotating shaft has cavity and be connected; Described welded stub connection 10 is communicated with cooling water source, water pump, and the cavity between flow pipe 3 and mandrel body 5 inwalls constitutes exhalant canal, and described exhalant canal is connected with the water chamber 1 of rotating shaft 7 rear ends.
Water in the cooling water pump; Through pipeline, entering connects firmly in the welded stub connection 10 on mandrel trolley 8, gets into then in the flow pipe 3 that welds with welded stub connection 10; Described flow pipe 3 is supported in the plug by support ring 9, has avoided making the flow pipe rotation because of the rotation of plug; Behind the cooled region of cooling water through mandrel body 6 and core head 4, the exhalant canal between flow pipe 3 and mandrel body 5 flows in the water chamber 1 of rotating shaft 7 rear ends, and by delivery port 2, flows in the ditch of ground.
As shown in Figure 2; Provide the another kind of structural representation of the utility model, among this embodiment, the middle cavities that said plug had is a through-hole structure; Cavities runs through whole plug promptly; The middle cavities of plug is as the cooling chamber of cooling plug, and described cooling chamber is communicated with cooling water source, water pump through the cavity that rotating shaft 7 is had, and described cooling chamber 7 not only is an intake tunnel but also be exhalant canal.
Water in the cooling water pump; Through pipeline, entering connects firmly in the welded stub connection 10 on mandrel trolley 8, gets in the cooling chamber of plug through the cavity that rotating shaft had then; Behind the cooled region of cooling water through mandrel body 6 and core head 4, flow in the ditch of ground by the front end of core head 4.
Claims (5)
1. stationary core rod that is used for hot rolled seamless steel tube, said stationary core rod mainly comprises core head (4) and mandrel body (6); It is characterized in that: described core head (4) has by back to preceding undergauge section and equal diameter section; Described undergauge section is made up of multistage circular cone stage body; Said equal diameter section is a cylinder.
2. the stationary core rod that is used for hot rolled seamless steel tube according to claim 1 is characterized in that: described plug has middle cavities; Be provided with the cooling chamber that is used to cool off plug in the middle cavities of plug; Be provided with flange (5) in the rear end of said mandrel body (6); Described flange (5) is connected with the ring flange of mandrel trolley rotating shaft (7) termination, constitutes the structure of plug with rotating shaft (7) rotation of mandrel trolley (8); The middle part of said rotating shaft (7) has cavity.
3. the stationary core rod that is used for hot rolled seamless steel tube according to claim 2 is characterized in that: the middle cavities that said plug had is forward to the undergauge section of core head (4); Be provided with the flow pipe (3) that is used to cool off plug in the middle cavities of plug; Said flow pipe (3) one ends are communicated with cooling water source, water pump through the cavity that rotating shaft (7) is had, and the cavity between flow pipe (3) and mandrel body (6) inwall constitutes exhalant canal.
4. the stationary core rod that is used for hot rolled seamless steel tube according to claim 2; It is characterized in that: the middle cavities that plug had is a through-hole structure; Cavities runs through whole plug promptly; The middle cavities of plug is as the cooling chamber of cooling plug, and described cooling chamber is communicated with cooling water source, water pump through the cavity that rotating shaft (7) is had, and described cooling chamber not only is an intake tunnel but also be exhalant canal.
5. the stationary core rod that is used for hot rolled seamless steel tube according to claim 1 is characterized in that: described mandrel body (6) and core head (4) are dismountable minute body structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204842354U CN202387729U (en) | 2011-11-29 | 2011-11-29 | Stationary core rod for carrying out hot rolling on seamless steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204842354U CN202387729U (en) | 2011-11-29 | 2011-11-29 | Stationary core rod for carrying out hot rolling on seamless steel tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202387729U true CN202387729U (en) | 2012-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204842354U Expired - Fee Related CN202387729U (en) | 2011-11-29 | 2011-11-29 | Stationary core rod for carrying out hot rolling on seamless steel tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202387729U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433281A (en) * | 2013-08-28 | 2013-12-11 | 无锡欧龙特种钢管有限公司 | Ejector header cooling device of seamless tube perforating machine |
| CN103801559A (en) * | 2012-11-08 | 2014-05-21 | 青岛宏泰铜业有限公司 | Rolled tube mandril manufacturing method and device for rolling rolled tube mandril |
| CN104014675A (en) * | 2014-06-19 | 2014-09-03 | 湘潭华进科技有限公司 | Circulating water cooling solid self-lubricating cone for high temperature thermal correction |
-
2011
- 2011-11-29 CN CN2011204842354U patent/CN202387729U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801559A (en) * | 2012-11-08 | 2014-05-21 | 青岛宏泰铜业有限公司 | Rolled tube mandril manufacturing method and device for rolling rolled tube mandril |
| CN103433281A (en) * | 2013-08-28 | 2013-12-11 | 无锡欧龙特种钢管有限公司 | Ejector header cooling device of seamless tube perforating machine |
| CN104014675A (en) * | 2014-06-19 | 2014-09-03 | 湘潭华进科技有限公司 | Circulating water cooling solid self-lubricating cone for high temperature thermal correction |
| CN104014675B (en) * | 2014-06-19 | 2016-01-27 | 湘潭华进科技股份有限公司 | High-temperature hot school shape recirculated water cooling self-lubricating solid cone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LUOYANG DINGRUI MATERIALS + TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LUOYANG ZHANGTAI FEIBIAO MACHINERY CO., LTD. Effective date: 20140421 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140421 Address after: 471003 Henan city of Luoyang province high tech Zone Fenghua Road, Science Park Patentee after: Luoyang Dingrui Materials & Technology Co., Ltd. Address before: Bai Ying high tech Development Zone 471003 Henan province Luoyang city substation West Patentee before: Luoyang Zhangtai Feibiao Machinery Co., Ltd. |
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| PP01 | Preservation of patent right |
Effective date of registration: 20150213 Granted publication date: 20120822 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20150813 Granted publication date: 20120822 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20151009 Granted publication date: 20120822 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20160409 Granted publication date: 20120822 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20151129 |