CN102233355A - Technological process for adding retained mandrel to reducing rolling section of hot-rolled small-diameter seamless steel tube - Google Patents
Technological process for adding retained mandrel to reducing rolling section of hot-rolled small-diameter seamless steel tube Download PDFInfo
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- CN102233355A CN102233355A CN2010101572230A CN201010157223A CN102233355A CN 102233355 A CN102233355 A CN 102233355A CN 2010101572230 A CN2010101572230 A CN 2010101572230A CN 201010157223 A CN201010157223 A CN 201010157223A CN 102233355 A CN102233355 A CN 102233355A
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Abstract
The invention relates to the technical field of hot-rolled small-diameter seamless steel tubes, and in particular relates to a technological process for adding a retained mandrel to a reducing rolling section of a hot-rolled small-diameter seamless steel tube. In the technological process, before reducing rolling of a pierced billet, the front end of the mandrel is quickly transferred to the reducing rolling section of the pierced billet, namely, a hole cavity structural position formed by three rollers, and then the pierced billet is subjected to even-wall reducing rolling through smooth sections at the front parts of the three rollers; the front end of the mandrel is of a reducing structure in smooth transition from the back to the front; the shape of the front end of the mandrel is consistent with that of the hole cavity structure formed by the three rollers; and the front end of the mandrel is accurately pushed to the reducing rolling section (the hole cavity structure formed by the three rollers) of the pierced billet under control of a PLC (programmable logic controller), and then the pierced billet is subjected to even-wall reducing rolling during the rolling process of the pierced billet. By utilizing the mode of adding the retained mandrel to the reducing rolling section of the pierced billet, the obtained product has the advantages of improved finish of the inner wall, even wall thickness remained during the reducing process and higher performance indexes such as dimensional precision, surface quality and the like, thus the product quality is ensured.
Description
Technical field
The present invention relates to a kind of hot rolling minor diameter seamless steel tube technology, relate generally to the process that a kind of hot rolling minor diameter seamless steel tube reducing and rolling section adds retained mandrel, be applicable to that the disposable reducing and rolling of hollow forging becomes the equipment of steel pipe.
Background technology
Present domestic heating rolling seamless steel pipe all is that rolling section at steel pipe adds plug, when the diameter of steel pipe, endoporus too hour, be subjected to the restriction of mandril strength, make add plug heating rolling seamless steel pipe become impossible, so present domestic hot rolled seamless steel tube all is the seamless steel pipe of rolling major diameter (more than the 76mm), the rolling general employing cold-drawn of minor diameter seamless steel tube or cold rolling will repeatedly be taken the lead in the process of producing, cold-drawn, pickling; And produce that the minor diameter seamless steel tube operation is many, cost is high, it is many to waste, no matter cold-drawn or cold rolling seamless steel all need pickling, phosphatization, saponifying process, this a few procedure severe contaminations water source, and country prohibites.The present invention has invented and three corresponding to mandrel structures of the formed vestibule structure of roll for solving the difficult problem that hot rolling minor diameter seamless steel tube adds plug, adds plug at the sizing reduction section of hollow forging, makes hot rolling minor diameter seamless steel tube become possibility.
The tradition hot rolled seamless steel tube adds the seamless steel pipe that plug is rolling major diameter (more than the 76mm), for hot rolling minor diameter seamless steel tube and add plug still technical barrier so far; And traditional handicraft is the sizing section that plug is added in hot finished steel pipe, and traditional plug generally is real cored structure, rollingly cools off plug after finishing a steel pipe.Promptly earlier hollow forging is heated certain hour, hollow forging is exported electric furnace after making hollow forging temperature in the electric furnace reach about 1100 degree with electric furnace; Penetrate cooled plug in the hollow forging and send into milling train, the work that plug can not be continuous, such rolling mill practice is very loaded down with trivial details.
Summary of the invention
The invention provides the process that the even wall section of a kind of hot rolling minor diameter seamless steel tube adds retained mandrel, improve the fineness of product inwall, in the process of tube reducing, wall thickness is even, guaranteed the quality of product, and every performance indications such as dimensional accuracy of steel pipe, surface quality are all than higher.
The process program that the present invention adopts is: before to the hollow forging reducing and rolling, the front end of plug is delivered to the reducing and rolling section of hollow forging fast, and promptly three the formed vestibule structure of roll positions are spared wall limit reducing and rolling by the anterior smooth section of three rolls to waste tube edge; Described plug has the mandrel body of hollow structure; The front end of described plug is positioned at hollow forging, and corresponding by the reducing and rolling position with hollow forging, and the front end of described plug is served as reasons the back to the convergent gauge structure of preceding rounding off; The formed vestibule structure of three rolls of the shape of described plug front end and hollow forging reducing and rolling section is consistent; Send in the rolling process at hollow forging, hollow forging is by even wall limit, limit reducing and rolling, the tapered core caput of plug can be pushed to the reducing and rolling section of hollow forging accurately, and promptly three formed vestibule structures of roll advance the Position Intelligent Control locate mode to realize by PLC control to plug; By plug mechanism, it is rolling in the operation of rolling of hollow forging hollow forging to be carried out the even wall of tube reducing, the present invention realizes that hot rolling minor diameter seamless steel tube reducing and rolling section adds the technology of retained mandrel, the cooling structure mode by improving plug, three corresponding to mandrel structures of the formed vestibule structure of roll, utilizes PLC control to advance the Position Intelligent Control locate mode to realize to plug.The cooling structure mode of plug is finished by a traditional steel pipe rolling, extracting plug out places to cool off again and changes that to adopt the plug internal structure be hollow recirculated water cooling structure into, be provided for cooling off the water inlet pipe of plug in the mandrel body of described hollow structure, described water inlet pipe delivery port is positioned at the rear end of mandrel body cavity, front end at described mandrel body is provided with swivel joint, and described swivel joint has the delivery port that is communicated with the mandrel body cavity.
The present invention adopts the mode that adds retained mandrel in the reducing and rolling section of hollow forging, promptly adopt the corresponding to mandrel structure of vestibule structure with three rolls, improved the fineness of product inwall, in the process of tube reducing, wall thickness is even, guaranteed the quality of product, and every performance indications such as dimensional accuracy of steel pipe, surface quality are all than higher; The circulation type of cooling in the cooling of described plug is adopted, the internal structure of plug adopts cavity structure, and recirculated water circulates the cooling plug during plug work in the plug cavity, can make the plug continuous operation.Effectively improve operating efficiency, simplified production technology, reduced production cost.
Description of drawings
Fig. 1 is the as-rolled condition schematic diagram.
Fig. 2 is the mandrel structure schematic diagram.
Fig. 3 is the plug structural scheme of mechanism.
Among the figure: 1, roll, 2, hollow forging, 3, plug 4, tapered core caput, 5, the plug pull bar, 6, delivery port, 7, water inlet, 8, swivel joint, 9, water inlet pipe, 10, slideway, 11, the PLC switch board, 12, motor.
The specific embodiment
In conjunction with the accompanying drawings, it is as follows to provide embodiments of the present invention:
Plug mechanism penetrates plug 3 and promotes in the hollow forging 2 to move ahead, the tapered core caput 4 of plug 3 moves to hollow forging reducing and rolling section 13, i.e. three the formed vestibule structure of roll positions, 1 one-tenth 120 formed vestibule structure of degree distribution of tapered core caput 4 and three rolls is consistent, send in the rolling process at hollow forging 2, hollow forging 2 is by even wall limit, limit reducing and rolling, the tapered core caput 4 of plug 3 can be pushed to the reducing and rolling section of hollow forging accurately, promptly three formed vestibule structures of roll advance the Position Intelligent Control locate mode to realize by 11 pairs of plugs of PLC switch board 3; By plug mechanism, it is rolling in the operation of rolling of hollow forging 2 hollow forging 2 to be carried out the even wall of tube reducing.
As Fig. 1 in conjunction with shown in Figure 3: the equipment that present embodiment is realized above-mentioned process using mainly is made up of distribute formed vestibule structure (being reducing and rolling section 13), motor 12, PLC switch board 11 of plug 3, slideway 10, three 1 one-tenth 120 degree of roll.Plug mechanism is the motion carrier of plug 3, and power is provided by motor 12, moves back and forth on slideway 10.The tail end of plug 3 is fixed in the plug mechanism by chuck, and chuck is fixed by rolling bearing, and by the PLC control system plug is carried out front and back adjustment, to guarantee arts demand.The powered plug that plug mechanism utilizes motor to provide before open rolling enters in the hollow forging, begin rolling subsequently, when rolling, when plug puts in place (being hollow forging reducing and rolling section), plug mechanism will automatically lock the position by the PLC control system and finish until a steel pipe rolling.
As shown in Figure 2: plug 3 is by tapered core caput 4, swivel joint 8, delivery port 6, and water inlet 7, plug pull bar 5, flow pipe 9 are formed.Core head is positioned at whole parts foremost, the rear end of swivel joint 8 plugs, water inlet and delivery port are all on swivel joint 8, built-in flow pipe is positioned at the inside of hollow plug, and during use, cooling water enters the flow pipe 9 of plug inside by water inlet 7, cooling water is delivered to the front end of plug by built-in flow pipe, by being discharged by delivery port 6 behind the recirculated cooling water, plug is ceaselessly cooled off in the earthing, at high temperature works normally to guarantee plug; Penetrate in the process of hollow forging at plug, when plug penetrated hollow forging arrival appointment rolling position, the plug leading section was positioned at even wall section.After rolling finishing of steel pipe anchor pole, plug is taken out of by plug mechanism, treats down wheel rolling.Finished a working cycles, after resetting, the work that goes round and begins again.
Claims (1)
1. a hot rolling minor diameter seamless steel tube reducing and rolling section adds the process of retained mandrel, it is characterized in that: before the hollow forging reducing and rolling, the front end of plug is delivered to the reducing and rolling section of hollow forging fast, promptly three the formed vestibule structure of roll positions are spared wall limit reducing and rolling by the anterior smooth section of three rolls to waste tube edge; Described plug has the mandrel body of hollow structure; The front end of described plug is positioned at hollow forging, and corresponding by the reducing and rolling position with hollow forging, and the front end of described plug is served as reasons the back to the convergent gauge structure of preceding rounding off; The formed vestibule structure of three rolls of the shape of described plug front end and hollow forging reducing and rolling section is consistent; Make the front end of plug accurately be pushed to the reducing and rolling section of hollow forging by PLC control, i.e. three formed vestibule structures of roll, by plug mechanism, it is rolling in the operation of rolling of hollow forging hollow forging to be carried out the even wall of tube reducing; The cooling structure mode of plug is finished by a traditional steel pipe rolling, extracting plug out places to cool off again and changes that to adopt the plug internal structure be hollow recirculated water cooling structure into, be provided for cooling off the water inlet pipe of plug in the mandrel body of described hollow structure, described water inlet pipe delivery port is positioned at the rear end of mandrel body cavity, front end at described mandrel body is provided with swivel joint, and described swivel joint has the delivery port that is communicated with the mandrel body cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101572230A CN102233355A (en) | 2010-04-28 | 2010-04-28 | Technological process for adding retained mandrel to reducing rolling section of hot-rolled small-diameter seamless steel tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101572230A CN102233355A (en) | 2010-04-28 | 2010-04-28 | Technological process for adding retained mandrel to reducing rolling section of hot-rolled small-diameter seamless steel tube |
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| CN102233355A true CN102233355A (en) | 2011-11-09 |
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| CN2010101572230A Pending CN102233355A (en) | 2010-04-28 | 2010-04-28 | Technological process for adding retained mandrel to reducing rolling section of hot-rolled small-diameter seamless steel tube |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489516A (en) * | 2011-11-29 | 2012-06-13 | 洛阳璋泰非标机械有限公司 | Process and equipment for hot rolling extra-small diameter seamless steel pipe with fixed mandrel |
| CN102699220A (en) * | 2012-07-02 | 2012-10-03 | 昆明理工大学 | Pinching method of tubing |
| CN104148392A (en) * | 2014-07-16 | 2014-11-19 | 洛阳鼎锐材料科技有限公司 | Large-rolling-force large-reduction rolling equipment and process for rolling steel pipes at low temperature |
| CN106391713A (en) * | 2016-10-31 | 2017-02-15 | 太原科技大学 | Mandrel rolling method for metal tubular product |
| CN110142360A (en) * | 2019-04-30 | 2019-08-20 | 常州益广自动化设备有限公司 | The full-automatic shrinkage cavity system of ignition tip bar |
| CN111843160A (en) * | 2020-07-20 | 2020-10-30 | 湖南三泰新材料股份有限公司 | Sleeving device and machining method for composite steel billet |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2163691A (en) * | 1984-09-01 | 1986-03-05 | Kocks Technik | Seamless tube manufacture |
| RU2138348C1 (en) * | 1998-10-12 | 1999-09-27 | Открытое акционерное общество "Электростальский завод тяжелого машиностроения" | Method for hot rolling of seamless thin-wall tubes |
| JP2000005805A (en) * | 1998-06-22 | 2000-01-11 | Nkk Corp | Drilling plug |
| CN101024229A (en) * | 2006-02-20 | 2007-08-29 | 李铁铎 | Continuous casting, continuous solling production method and apparatus for stainless steel seamless composite pipe |
| CN101259589A (en) * | 2008-04-28 | 2008-09-10 | 洛阳鼎锐材料科技有限公司 | Two-stand angularly hot rolling minor diameter seamless steel tube rolling technique and equipment thereof |
| CN101259588A (en) * | 2008-04-28 | 2008-09-10 | 洛阳邦强机械有限公司 | Fewer stands longitudinal hot rolling minor diameter thin wall seamless steel tube rolling technique and equipment thereof |
-
2010
- 2010-04-28 CN CN2010101572230A patent/CN102233355A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2163691A (en) * | 1984-09-01 | 1986-03-05 | Kocks Technik | Seamless tube manufacture |
| JP2000005805A (en) * | 1998-06-22 | 2000-01-11 | Nkk Corp | Drilling plug |
| RU2138348C1 (en) * | 1998-10-12 | 1999-09-27 | Открытое акционерное общество "Электростальский завод тяжелого машиностроения" | Method for hot rolling of seamless thin-wall tubes |
| CN101024229A (en) * | 2006-02-20 | 2007-08-29 | 李铁铎 | Continuous casting, continuous solling production method and apparatus for stainless steel seamless composite pipe |
| CN101259589A (en) * | 2008-04-28 | 2008-09-10 | 洛阳鼎锐材料科技有限公司 | Two-stand angularly hot rolling minor diameter seamless steel tube rolling technique and equipment thereof |
| CN101259588A (en) * | 2008-04-28 | 2008-09-10 | 洛阳邦强机械有限公司 | Fewer stands longitudinal hot rolling minor diameter thin wall seamless steel tube rolling technique and equipment thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489516A (en) * | 2011-11-29 | 2012-06-13 | 洛阳璋泰非标机械有限公司 | Process and equipment for hot rolling extra-small diameter seamless steel pipe with fixed mandrel |
| CN102699220A (en) * | 2012-07-02 | 2012-10-03 | 昆明理工大学 | Pinching method of tubing |
| CN104148392A (en) * | 2014-07-16 | 2014-11-19 | 洛阳鼎锐材料科技有限公司 | Large-rolling-force large-reduction rolling equipment and process for rolling steel pipes at low temperature |
| CN106391713A (en) * | 2016-10-31 | 2017-02-15 | 太原科技大学 | Mandrel rolling method for metal tubular product |
| CN106391713B (en) * | 2016-10-31 | 2019-03-12 | 太原科技大学 | A kind of mandrel rolling method of metal pipe material |
| CN110142360A (en) * | 2019-04-30 | 2019-08-20 | 常州益广自动化设备有限公司 | The full-automatic shrinkage cavity system of ignition tip bar |
| CN110142360B (en) * | 2019-04-30 | 2024-02-23 | 常州益广自动化设备有限公司 | Full-automatic shrinkage cavity system of conducting nozzle bar |
| CN111843160A (en) * | 2020-07-20 | 2020-10-30 | 湖南三泰新材料股份有限公司 | Sleeving device and machining method for composite steel billet |
| CN111843160B (en) * | 2020-07-20 | 2023-06-16 | 湖南三泰新材料股份有限公司 | Composite billet sleeving device and processing method |
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Application publication date: 20111109 |