CN101954377A - Full-floating mandrel tandem-rolling seamless steel pipe production process - Google Patents
Full-floating mandrel tandem-rolling seamless steel pipe production process Download PDFInfo
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- CN101954377A CN101954377A CN 201010290071 CN201010290071A CN101954377A CN 101954377 A CN101954377 A CN 101954377A CN 201010290071 CN201010290071 CN 201010290071 CN 201010290071 A CN201010290071 A CN 201010290071A CN 101954377 A CN101954377 A CN 101954377A
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Abstract
The invention discloses a full-floating mandrel tandem-rolling seamless steel pipe production process for solving the problem of low production efficiency, high consumption and high pollution in the traditional perforation, lube rolling mill and cold drawn seamless steel tube production process. The production process comprises the following steps of: heating, heating pipe blanks in a heating furnace; perforating, perforating the heated pipe blanks by a provided perforator; carrying out diameter reduction by utilizing six stand hollow billets: reducing diameter of the perforated tubular billets by a six-stand hollow billets diameter reducer; carrying out eight stand tandem rolling, extensively rolling the tubular billets after the diameter reduction by utilizing the six stand hollow billets by a tandem rolling pipe mill continuously provided with the eight stands; carrying out single stand mandrel removing, removing mandrels from pierced billets with mandrels after the eight stand tandem rolling by a single-stand mandrel removing machine; carrying out 28-stand tension diameter reducing, rolling the pierced billets after mandrel removing in an 28-stand tension diameter reducer to form hot finished-product steel pipes; and finishing, finishing the hot finished-product steel pipes to form finished-product steel pipes.
Description
Affiliated technical field
The present invention relates to a kind of full-floating plug tandem rolling seamless steel tube production technology, belong to metal rolled technical field.
Background technology
Traditional perforation+automatic tube rolling mill+solid drawn tube production technology, production efficiency is low, consumption is high, pollution is high.
Summary of the invention
The purpose of this invention is to provide a kind of high yield, high-quality, low consumption, free of contamination full-floating plug tandem rolling seamless steel tube production technology.
For achieving the above object, the present invention adopts following technical scheme: full-floating plug tandem rolling seamless steel tube production technology provided by the invention comprises the steps:
Heating is heated pipe in heating furnace;
Perforation is provided with a punch pipe after heating is bored a hole;
Hollow billet after 6 frame hollow ingot tube reducings will be bored a hole is tube reducing on 6 frame hollow ingot reducing mills.
The tandem rolling tube machine that the hollow billet of 8 frame tandem rollings after with 6 frame hollow ingot tube reducings arranged continuously by 8 frames extends rolling.
Single chassis is taken off rod and the hollow forging of cored bar behind the 8 frame tandem rollings is taken off on the excellent machine in single chassis is taken off rod.
28 frame stretch reducings dispose 28 frame stretch-reducing mills after single chassis is taken off excellent machine, take off hollow forging behind the rod and enter 28 frame stretch-reducing mills and be rolled, and form hot fished pipe.
Finishing forms fished pipe after with hot fished pipe finishing.
Further, described step adds pines for, with heating of pipe blank to 1100～1280 ℃.
Wherein, described heating furnace is Sloping Hearth Heating Furnace, rotary heating furnace, walking beam furnace.
In the described step perforation, utilize punch that pipe is bored a hole, described punch is vertical cone mill, the vertical punch of Diesel.
In the described step 6 frame hollow ingot tube reducing, with the hollow billet tube reducing on 6 frame hollow ingot reducing mills after the perforation, described hollow ingot reducing mill is three roller hollow ingot reducing mills.
In the described step 8 frame tandem rolling, the tandem rolling tube machine that the hollow billet behind the 6 frame hollow ingot tube reducings is arranged continuously by 8 frames extends rolling.Described tandem rolling tube machine is MPM tandem rolling tube machine, PQF three-roller tandem rolling tube machine.
Described step single chassis is taken off in the rod, and the hollow forging behind the 8 frame tandem rollings is shifted out roll line with plug, and the clamp constraint that hollow forging is opened and closed by axial force and hydraulic pressure is motionless, with taking off bar device plug is extracted out from hollow forging, and described to take off excellent machine be that single chassis is taken off excellent machine.
In the described step 28 frame stretch reducing, the hollow forging that will take off behind the rod enters 28 frame stretch reducings, and described stretch-reducing mill is 28 frame three-roller tension reducing mills.
Described step finishing, comprise blow ash, aligning, excision burr tail, hand inspection, defect detecting test, the water pressure test,, spray printing sign, corrosion-inhibiting coating, measure each operation or wherein any practical need the combination operation of operation.
The invention has the beneficial effects as follows: rolling rhythm fast (can reach 3.5～4/min), the output height; Use the product that the pipe of a kind of specification can the production plurality of specifications, saved the various production costs of conversion pipe, made things convenient for production management and control.
Description of drawings
Fig. 1 is technological process of production figure of the present invention
The specific embodiment
In order to make those skilled in the art person understand the present invention program better, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with drawings and Examples.
As shown in Figure 1, full-floating plug tandem rolling seamless steel tube production technology provided by the invention comprises the steps:
Heating is heated pipe in heating furnace.
Described heating furnace can be selected Sloping Hearth Heating Furnace, rotary heating furnace, walking beam furnace for use, and the heating-up temperature scope is 1100～1280 ℃;
Perforation is provided with a punch pipe after heating is bored a hole.
Described punch can be selected vertical cone mill, the vertical punch of Diesel for use;
6 frame hollow ingot tube reducings are provided with 6 frame hollow ingot reducing mills behind punch, with the hollow billet tube reducing on 6 frame hollow ingot reducing mills after the perforation.
Described hollow ingot reducing mill can be selected three roller hollow ingot reducing mills for use;
8 frame tandem rollings are provided with 8 frame tandem rollings behind 6 frame hollow ingot reducing mills, the tandem rolling tube machine that the hollow billet behind the 6 frame hollow ingot tube reducings is arranged continuously by 8 frames extends rolling.
Described tandem rolling tube machine can be selected MPM tandem rolling tube machine, PQF three-roller tandem rolling tube machine for use;
Single chassis is taken off rod and behind 8 frame tandem rollings single chassis is set and takes off excellent machine, and the hollow forging behind the 8 frame tandem rollings is shifted out roll line with plug, and the clamp constraint that hollow forging is opened and closed by axial force and hydraulic pressure is motionless, with taking off bar device plug is extracted out from hollow forging.
Describedly take off excellent machine and can select for use single chassis to take off excellent machine;
28 frame stretch reducings dispose 28 frame stretch-reducing mills after single chassis is taken off excellent machine, take off hollow forging behind the rod and enter 28 frame stretch-reducing mills and be rolled, and form hot fished pipe.The frame quantity of using in the actual production is decided on product specification, and different product specifications are used the frame of different numbers, at most available 28 frames, maximum sizing reduction can reach 75%～80%, maximum wall thickness reducing amount can reach 35%～40%, and lengthening coefficient can reach 6～8, and muzzle velocity can reach 16m/s.
Described stretch-reducing mill can be selected 28 frame three-roller tension reducing mills for use;
Finishing forms fished pipe after with hot fished pipe finishing.
Finishing procedure is to the cooled further processing of hot fished pipe, comprise blow ash, aligning, excision burr tail, hand inspection, defect detecting test, the water pressure test,, spray printing sign, corrosion-inhibiting coating, measure each operation or wherein any practical need the combination operation of operation, finally obtain the commodity steel pipe.
Rolling described in this processing step, be that the total reducing rate by design carries out in the reducing pass system in definite deciding, and the reducing pass system that decides that determines designs according to production specification scope, product requirement, and the parameter of the equipment rack quantity in this processing step, inlet mill speed, frame and equipment is determined according to pass schedule.
Claims (10)
1. a full-floating plug tandem rolling seamless steel tube production technology is characterized in that, comprises the steps:
Heating is heated pipe in heating furnace;
Perforation is provided with a punch pipe after heating is bored a hole;
6 frame hollow ingot tube reducings are provided with 6 frame hollow ingot reducing mills behind punch, with the hollow billet tube reducing on 6 frame hollow ingot reducing mills after the perforation;
8 frame tandem rollings are provided with 8 frame tandem rolling tube machines behind 6 frame hollow ingot reducing mills, the tandem rolling tube machine that the hollow billet behind the 6 frame hollow ingot tube reducings is arranged continuously by 8 frames extends rolling;
Single chassis is taken off rod and behind 8 frame tandem rolling tube machines single chassis is set and takes off excellent machine, the hollow forging of cored bar behind the 8 frame tandem rollings is taken off on the excellent machine in single chassis take off rod;
28 frame stretch reducings are provided with 28 frame stretch-reducing mills after single chassis is taken off excellent machine, take off hollow forging behind the rod and enter 28 frame stretch-reducing mills and be rolled, and form hot fished pipe;
Finishing forms fished pipe after with hot fished pipe finishing.
2. a kind of full-floating plug tandem rolling seamless steel tube production technology according to claim 1 is characterized in that described step adds pines for, with heating of pipe blank to 1100～1280 ℃.
3. a kind of full-floating plug tandem rolling seamless steel tube production technology according to claim 1 and 2 is characterized in that described heating furnace can be selected Sloping Hearth Heating Furnace, rotary heating furnace, walking beam furnace for use.
4. a kind of full-floating plug tandem rolling seamless steel tube production technology according to claim 1 is characterized in that, in the described step perforation, utilizes punch that pipe is bored a hole, and described punch can be selected vertical cone mill, the vertical punch of Diesel for use.
5. a kind of full-floating plug tandem rolling seamless steel tube production technology according to claim 1, it is characterized in that, in the described step 6 frame hollow ingot tube reducing, with the hollow billet tube reducing on 6 frame hollow ingot reducing mills after the perforation, described hollow ingot reducing mill can be selected three roller hollow ingot reducing mills for use.
6. a kind of full-floating plug tandem rolling seamless steel tube production technology according to claim 1 is characterized in that described tandem rolling tube machine can be selected MPM tandem rolling tube machine, PQF three-roller tandem rolling tube machine for use.
7. a kind of full-floating plug tandem rolling seamless steel tube production technology according to claim 1, it is characterized in that, described step single chassis is taken off in the rod, hollow forging behind the 8 frame tandem rollings is shifted out roll line with plug, the clamp constraint that hollow forging is opened and closed by axial force and hydraulic pressure is motionless, with taking off bar device plug is extracted out from hollow forging, describedly taken off excellent machine and can select for use single chassis to take off excellent machine.
8. a kind of full-floating plug tandem rolling seamless steel tube production technology according to claim 1 is characterized in that described stretch-reducing mill can be selected 28 frame three-roller tension reducing mills for use.
9. a kind of full-floating plug tandem rolling seamless steel tube production technology according to claim 1, it is characterized in that, finishing procedure is to the cooled further processing of hot fished pipe, comprise blow ash, aligning, excision burr tail, hand inspection, defect detecting test, the water pressure test,, spray printing sign, corrosion-inhibiting coating, measure each operation or wherein any practical need the combination operation of operation, finally obtain the commodity steel pipe.
10. a kind of full-floating plug tandem rolling seamless steel tube production technology according to claim 1, it is characterized in that, rolling described in this processing step, be that the total reducing rate by design carries out in the reducing pass system in definite deciding, and the reducing pass system that decides that determines designs according to production specification scope, product requirement, and the parameter of the equipment rack quantity in this processing step, inlet mill speed, frame and equipment is determined according to pass schedule.
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| CN 201010290071 CN101954377A (en) | 2010-09-13 | 2010-09-13 | Full-floating mandrel tandem-rolling seamless steel pipe production process |
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| CN 201010290071 CN101954377A (en) | 2010-09-13 | 2010-09-13 | Full-floating mandrel tandem-rolling seamless steel pipe production process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699102A (en) * | 2012-06-07 | 2012-10-03 | 重庆钢铁(集团)有限责任公司 | Production process method of small-caliber cold-drawing seamless steel tube used for boiler |
| CN102974615A (en) * | 2012-11-08 | 2013-03-20 | 聊城市开发区全运钢管制造有限公司 | Rolling process method of punched lining core of steel rod |
| CN104826868A (en) * | 2015-02-10 | 2015-08-12 | 长葛市一鸣机械有限公司 | Small-diameter seamless steel pipe floating mandrel continuous mill unit and seamless steel pipe production process |
| CN107803411A (en) * | 2017-09-19 | 2018-03-16 | 扬州诚德钢管有限公司 | A kind of manufacture method of super austenitic stainless steel seamless large-diameter pipes |
| CN108971229A (en) * | 2018-09-07 | 2018-12-11 | 无锡华贝钢管制造有限公司 | A kind of tube reducing technique of efficient quick |
| CN109963664A (en) * | 2016-10-14 | 2019-07-02 | 丹尼尔和科菲森梅克尼齐有限公司 | The multi-frame roller mill of rolling system for oblique type or hot Pilger pipe mill type or automatic mill type finishing roller mill |
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| JPS62227509A (en) * | 1986-03-28 | 1987-10-06 | Sumitomo Metal Ind Ltd | Rolling method for seamless steel pipe |
| US6089066A (en) * | 1998-03-04 | 2000-07-18 | Mannesmann Ag | Process for the production of seamless tubes |
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| CN101327492A (en) * | 2008-07-30 | 2008-12-24 | 郝建庚 | Process and system for manufacturing hot-rolled seamless tube |
| CN101337236A (en) * | 2007-07-06 | 2009-01-07 | 中冶东方工程技术有限公司 | Rolling mill technique of three-roller full-floating core rod tandem rolling tube |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699102A (en) * | 2012-06-07 | 2012-10-03 | 重庆钢铁(集团)有限责任公司 | Production process method of small-caliber cold-drawing seamless steel tube used for boiler |
| CN102699102B (en) * | 2012-06-07 | 2015-06-03 | 重庆钢铁(集团)有限责任公司 | Production process method of small-caliber cold-drawing seamless steel tube used for boiler |
| CN102974615A (en) * | 2012-11-08 | 2013-03-20 | 聊城市开发区全运钢管制造有限公司 | Rolling process method of punched lining core of steel rod |
| CN104826868A (en) * | 2015-02-10 | 2015-08-12 | 长葛市一鸣机械有限公司 | Small-diameter seamless steel pipe floating mandrel continuous mill unit and seamless steel pipe production process |
| CN109963664A (en) * | 2016-10-14 | 2019-07-02 | 丹尼尔和科菲森梅克尼齐有限公司 | The multi-frame roller mill of rolling system for oblique type or hot Pilger pipe mill type or automatic mill type finishing roller mill |
| CN109963664B (en) * | 2016-10-14 | 2021-10-22 | 丹尼尔和科菲森梅克尼齐有限公司 | Multi-stand rolling mill for a rolling system with a finishing rolling mill of the skew or hot pilger type or of the automatic type |
| CN107803411A (en) * | 2017-09-19 | 2018-03-16 | 扬州诚德钢管有限公司 | A kind of manufacture method of super austenitic stainless steel seamless large-diameter pipes |
| CN108971229A (en) * | 2018-09-07 | 2018-12-11 | 无锡华贝钢管制造有限公司 | A kind of tube reducing technique of efficient quick |
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Application publication date: 20110126 |