EP0362122A1 - Procédé de redressage à chaud de tubes en acier - Google Patents

Procédé de redressage à chaud de tubes en acier Download PDF

Info

Publication number: EP0362122A1
Authority: EP; European Patent Office
Prior art keywords: cooling; straightening; pipes; rolling stock; accelerated
Prior art date: 1988-09-27
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP89730188A

Other languages

German (de)

English (en)

Other versions

EP0362122B1 (fr

Inventor

Ingo Dr. Ing. Von Hagen

Karlheinz Dr. Kutzenberger

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Vodafone GmbH

Original Assignee

Mannesmann AG

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1988-09-27

Filing date

1989-08-16

Publication date

1990-04-04

1989-08-16 Application filed by Mannesmann AG filed Critical Mannesmann AG

1989-08-16 Priority to AT89730188T priority Critical patent/ATE87515T1/de

1990-04-04 Publication of EP0362122A1 publication Critical patent/EP0362122A1/fr

1993-03-31 Application granted granted Critical

1993-03-31 Publication of EP0362122B1 publication Critical patent/EP0362122B1/fr

2009-08-16 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

238000000034 method Methods 0.000 title claims abstract description 25
229910000831 Steel Inorganic materials 0.000 title claims abstract description 12
239000010959 steel Substances 0.000 title claims abstract description 12
238000001816 cooling Methods 0.000 claims abstract description 29
238000005096 rolling process Methods 0.000 claims abstract description 12
239000002826 coolant Substances 0.000 claims description 4
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
238000010438 heat treatment Methods 0.000 claims description 3
239000000839 emulsion Substances 0.000 claims description 2
239000000203 mixture Substances 0.000 claims description 2
230000017525 heat dissipation Effects 0.000 claims 1
230000001788 irregular Effects 0.000 claims 1
230000001105 regulatory effect Effects 0.000 claims 1
238000011144 upstream manufacturing Methods 0.000 claims 1
238000005452 bending Methods 0.000 description 3
239000011265 semifinished product Substances 0.000 description 3
238000007710 freezing Methods 0.000 description 2
230000008014 freezing Effects 0.000 description 2
230000001771 impaired effect Effects 0.000 description 2
239000000463 material Substances 0.000 description 2
238000010791 quenching Methods 0.000 description 2
230000000171 quenching effect Effects 0.000 description 2
239000003570 air Substances 0.000 description 1
238000010276 construction Methods 0.000 description 1
230000007797 corrosion Effects 0.000 description 1
238000005260 corrosion Methods 0.000 description 1
230000003247 decreasing effect Effects 0.000 description 1
230000007547 defect Effects 0.000 description 1
238000011161 development Methods 0.000 description 1
230000018109 developmental process Effects 0.000 description 1
230000000694 effects Effects 0.000 description 1
238000009434 installation Methods 0.000 description 1
239000007788 liquid Substances 0.000 description 1
238000004519 manufacturing process Methods 0.000 description 1
238000010606 normalization Methods 0.000 description 1
238000004881 precipitation hardening Methods 0.000 description 1
239000000047 product Substances 0.000 description 1
238000010079 rubber tapping Methods 0.000 description 1
238000005482 strain hardening Methods 0.000 description 1
238000005496 tempering Methods 0.000 description 1

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts

Definitions

the invention relates to a method for hot straightening steel pipes according to the preamble of claim 1 and a system for performing this method.
the cooling of steel pipes from the rolling heat or from an elevated temperature after a heat treatment measure often leads to the pipes being warped, ie to an inadequate pipe geometry (eg poor straightness, ovality).
a hot straightening process is carried out on such warped rolling stock, which takes place at such a high temperature that the Bauschinger effect can no longer be observed.
the temperature of the rolling stock during the straightening process is therefore usually above about 300 ° C., but below A c1 or A r1 .
the tensile strength of the straightened good is exceeded by suitably applying mechanical stresses in the straightening cross-section, so that a defined curvature of the straightened good is set (normalization curvature).
the desired geometry is then achieved by alternate bending and counter-bending with a decreasing bending amplitude.
a major disadvantage of the known hot straightening process is that the rolled material undergoes a more or less uncontrolled cooling in air after the straightening process and is uneven in accordance with the geometric conditions. This leads to the fact that the "ideal geometry" achieved in the straightening machine is partially lost again.
Even complex cooling bed constructions in which, for example the rolling stock behind the straightening machine is kept in constant rotation in order to cool down evenly, cannot remedy this defect.
steel pipes in which wall thickness fluctuations occur due to the manufacturing process due to the circumference and / or length, lead to cooling at different locations and consequently to different degrees of shrinkage, which result in permanent deformations of the warmer zones, so that, for example, an ovality arises.
the object of the invention is therefore to develop a generic method so that these disadvantages are largely excluded.
an installation for carrying out this method is to be specified.
the basic idea of the invention is to be seen in that the geometry of the rolling stock obtained during hot straightening is maintained by, as it were, freezing this state as soon as possible after it has been reached. This freezing should take place as quickly as possible, that is to say in the form of a quenching process, to a temperature at which the geometry practically no longer changes as a result of cooling voltages when cooling further.
the necessary cooling measures e.g. nozzle ring for the supply of water, air, emulsions and / or water / air mixtures
part of the tube length in which the desired geometry has already been achieved is therefore already cooled while a part length is still being straightened and at the same time a third part length is even being done has not entered the straightener. So cooling is not waited until the entire pipe has run out of the straightener. Rather, the targeted quenching immediately after reaching the desired geometry in the individual length elements of the tube ensures that undesirable changes in geometry due to uncontrolled cooling do not occur. It is essential that the cooling takes place as evenly as possible over the cross-section of the pipes. In the case of pipes with a non-uniform cross-sectional geometry (e.g.
the method according to the invention makes it possible to maintain a high degree of accuracy in the geometry of the pipes after hot straightening and thus to dispense with cold messaging, and moreover has the advantage that a complex cooling bed behind the straightening machine can be dispensed with.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Heat Treatments In General, Especially Conveying And Cooling (AREA)
Metal Rolling (AREA)
Heat Treatment Of Articles (AREA)
Heat Treatment Of Steel (AREA)

EP89730188A 1988-09-27 1989-08-16 Procédé de redressage à chaud de tubes en acier Expired - Lifetime EP0362122B1 (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
AT89730188T ATE87515T1 (de)	1988-09-27	1989-08-16	Verfahren zum warmrichten von stahlrohren.

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE3833163		1988-09-27
DE3833163		1988-09-27

Publications (2)

Publication Number	Publication Date
EP0362122A1 true EP0362122A1 (fr)	1990-04-04
EP0362122B1 EP0362122B1 (fr)	1993-03-31

Family

ID=6364031

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP89730188A Expired - Lifetime EP0362122B1 (fr)	1988-09-27	1989-08-16	Procédé de redressage à chaud de tubes en acier

Country Status (4)

Country	Link
EP (1)	EP0362122B1 (fr)
AT (1)	ATE87515T1 (fr)
DE (1)	DE58903947D1 (fr)
ES (1)	ES2039933T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19828785A1 (de) *	1998-06-27	1999-12-30	Schloemann Siemag Ag	Verfahren zum Richten von Profilstahl
EP0967027A3 (fr) *	1998-06-27	2000-07-05	SMS Demag AG	Méthode de redressement de profilés métalliques en minimisant les tensions internes en même temps
KR100878735B1 (ko) *	2006-07-12	2009-01-14	닛토덴코 가부시키가이샤	광학 보상층 부착 편광판, 그 제조 방법, 및 액정 패널,액정 디스플레이, 및 그를 포함한 이미지 디스플레이
CN104668316A (zh) *	2015-02-25	2015-06-03	成都易态科技有限公司	烧结坯件炉外矫直的方法和装置
CN113996888A (zh) *	2021-11-24	2022-02-01	中冶陕压重工设备有限公司	一种支撑辊轴承座加工变形的焊接修复方法
CN119972804A (zh) *	2025-04-02	2025-05-13	湖南华菱湘潭钢铁有限公司	一种刚制棒材生产在线热矫直方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE888401C (de) *	1943-07-20	1953-08-31	Administration Sequestre Des R	Verfahren zum Richten von Werkstuecken
DE914862C (de) *	1942-12-29	1954-08-09	Hohenlimburger Walzwerke Ag	Durchlaufverfahren und Vorrichtung zum Haerten, Vergueten und Biegen von Profilstaeben
GB748357A (en) *	1953-06-01	1956-05-02	Somerset Wire Company Ltd	Improvements in the manufacture of wire and the like
GB1038359A (en) *	1964-05-27	1966-08-10	Drever Co	Roller pressure quench system
DE2262140A1 (de) *	1972-12-19	1974-06-20	Lasalle Steel Co	Verfahren zum richten von stahlhalbzeug

1989
- 1989-08-16 AT AT89730188T patent/ATE87515T1/de not_active IP Right Cessation
- 1989-08-16 ES ES198989730188T patent/ES2039933T3/es not_active Expired - Lifetime
- 1989-08-16 EP EP89730188A patent/EP0362122B1/fr not_active Expired - Lifetime
- 1989-08-16 DE DE8989730188T patent/DE58903947D1/de not_active Expired - Fee Related

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE914862C (de) *	1942-12-29	1954-08-09	Hohenlimburger Walzwerke Ag	Durchlaufverfahren und Vorrichtung zum Haerten, Vergueten und Biegen von Profilstaeben
DE888401C (de) *	1943-07-20	1953-08-31	Administration Sequestre Des R	Verfahren zum Richten von Werkstuecken
GB748357A (en) *	1953-06-01	1956-05-02	Somerset Wire Company Ltd	Improvements in the manufacture of wire and the like
GB1038359A (en) *	1964-05-27	1966-08-10	Drever Co	Roller pressure quench system
DE2262140A1 (de) *	1972-12-19	1974-06-20	Lasalle Steel Co	Verfahren zum richten von stahlhalbzeug

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 50 (M-281)[1487], 7. März 1987; & JP-A-58 202 915 (SUMITOMO KINZOKU KOGYO K.K.) 26-11-1983 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19828785A1 (de) *	1998-06-27	1999-12-30	Schloemann Siemag Ag	Verfahren zum Richten von Profilstahl
EP0967026A3 (fr) *	1998-06-27	2000-07-05	SMS Demag AG	Méthode de redressement de profilés métalliques
EP0967027A3 (fr) *	1998-06-27	2000-07-05	SMS Demag AG	Méthode de redressement de profilés métalliques en minimisant les tensions internes en même temps
DE19828785C2 (de) *	1998-06-27	2000-08-03	Sms Demag Ag	Verfahren zum Richten von gewalztem Profilstahl
KR100878735B1 (ko) *	2006-07-12	2009-01-14	닛토덴코 가부시키가이샤	광학 보상층 부착 편광판, 그 제조 방법, 및 액정 패널,액정 디스플레이, 및 그를 포함한 이미지 디스플레이
US7557883B2 (en)	2006-07-12	2009-07-07	Nitto Denko Corporation	Polarizing plate with optical compensation layer, method of producing the same, and liquid crystal panel, liquid crystal display, and image display including the same
CN104668316A (zh) *	2015-02-25	2015-06-03	成都易态科技有限公司	烧结坯件炉外矫直的方法和装置
CN113996888A (zh) *	2021-11-24	2022-02-01	中冶陕压重工设备有限公司	一种支撑辊轴承座加工变形的焊接修复方法
CN119972804A (zh) *	2025-04-02	2025-05-13	湖南华菱湘潭钢铁有限公司	一种刚制棒材生产在线热矫直方法

Also Published As

Publication number	Publication date
DE58903947D1 (de)	1993-05-06
ES2039933T3 (es)	1993-10-01
EP0362122B1 (fr)	1993-03-31
ATE87515T1 (de)	1993-04-15

Legal Events

Date	Code	Title	Description
1990-02-17	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1990-04-04	AK	Designated contracting states	Kind code of ref document: A1 Designated state(s): AT DE ES FR GB IT SE
1990-04-18	17P	Request for examination filed	Effective date: 19900219
1991-09-18	17Q	First examination report despatched	Effective date: 19910806
1993-02-12	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1993-03-29	ITF	It: translation for a ep patent filed
1993-03-31	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): AT DE ES FR GB IT SE
1993-03-31	REF	Corresponds to:	Ref document number: 87515 Country of ref document: AT Date of ref document: 19930415 Kind code of ref document: T
1993-04-16	ET	Fr: translation filed
1993-05-06	REF	Corresponds to:	Ref document number: 58903947 Country of ref document: DE Date of ref document: 19930506
1993-07-28	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)	Effective date: 19930629
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1994-02-03	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1994-03-23	26N	No opposition filed
1994-04-13	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 19930816
1994-07-19	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 19940719 Year of fee payment: 6
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