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RU2151658C1 - Method for making seamless tubes - Google Patents

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RU2151658C1
RU2151658C1 RU99111692A RU99111692A RU2151658C1 RU 2151658 C1 RU2151658 C1 RU 2151658C1 RU 99111692 A RU99111692 A RU 99111692A RU 99111692 A RU99111692 A RU 99111692A RU 2151658 C1 RU2151658 C1 RU 2151658C1
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Prior art keywords
pilgrim
hood
mills
rolling
pilger
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RU99111692A
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Russian (ru)
Inventor
А.А. Федоров
А.В. Сафьянов
Л.И. Лапин
В.В. Игнатьев
И.А. Романцов
С.В. Ненахов
Г.И. Спиридонов
В.А. Головинов
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АООТ "Челябинский трубопрокатный завод"
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Abstract

FIELD: tube production, namely, method for making seamless tubes, possibly in tube rolling equipment with pilger mills including mills for helical rolling. SUBSTANCE: method comprises steps of piercing ingots (billets) with different elongation values along sleeve length in conditions when maximum elongation value corresponds to sleeve portion forming pilger head. EFFECT: reduced metal consumption due to lowered amount of crop in rolling equipment with pilger mills.

Description

Изобретение относится к трубному производству, а именно к способу производств бесшовных труб, и может быть использовано при производстве труб на трубопрокатных установках с пилигримовыми станами, имеющих в своем составе станы поперечно-винтовой прокатки. The invention relates to pipe production, and in particular to a method for the production of seamless pipes, and can be used in the production of pipes in pipe rolling plants with pilgrim mills incorporating cross-helical rolling mills.

Наиболее близким к изобретению является способ производства бесшовных труб на установках с пилигримовыми станами, согласно которому нагретый до температуры 1250-1300oC слиток (заготовка) задают в стан поперечно-винтовой прокатки и прошивают с вытяжкой Мпр, далее гильзу прокатывают на пилигримовом стане с вытяжкой Мпил (Данилов Ф.Н., Глейберг А.З., Балакин В.Г. Горячая прокатка труб. - Металлургиздат, 1962, с. 300-301).Closest to the invention is a method for the production of seamless pipes in plants with pilgrim mills, according to which an ingot (billet) heated to a temperature of 1250-1300 o C is introduced into a cross-helical rolling mill and stitched with an M pr hood, then the sleeve is rolled on a pilgrim mill extractor M saw (Danilov F.N., Gleyberg A.Z., Balakin V.G. Hot rolling of pipes. - Metallurgizdat, 1962, p. 300-301).

Недостатком данного способа производства труб на установках с пилигримовыми станами является высокий расходный коэффициент металла, связанный с образованием пилигримовой головки, обусловленной технологическим процессом, которая занимает основную долю отходов металла при изготовлении труб. The disadvantage of this method of production of pipes in plants with pilgrim mills is the high expenditure coefficient of the metal associated with the formation of the pilgrim head, due to the technological process, which occupies the bulk of metal waste in the manufacture of pipes.

Цель изобретения - уменьшить расходный коэффициент металла при производстве труб на установках с пилигримовыми станами. The purpose of the invention is to reduce the expenditure coefficient of the metal in the production of pipes in plants with pilgrim mills.

Это достигается тем, что согласно предлагаемому способу прошивку слитков (заготовок) осуществляют с разной вытяжкой по длине гильз Мпр и Мпр1, где максимальная вытяжка Мпр1 приходится на участок гильзы, образующий пилигримовую головку.This is achieved by the fact that according to the proposed method, the ingots (billets) are flashed with different hoods along the length of the sleeves M pr and M pr1 , where the maximum draw M pr1 falls on the sleeve section forming the pilgrim head.

Учитывая, что вес пилигримовой головки зависит от вытяжки на пилигримовом стане и веса погонного метра прокатываемой трубы
P = 0,2 (Mпил + 0,33) ρ,
где P - вес пилигримовой головки, кг;
Mпил - вытяжка на пилигримовом стане;
ρ - вес погонного метра трубы, кг/м и что суммарная вытяжка постоянная M = Mпр, Mпил, то увеличение вытяжки на прошивном стане уменьшает вытяжку на пилигримовом стане и дает снижение веса пилигримовой головки, а следовательно и расхода металла на величину

Figure 00000001

(Инструкция по нормированию металла и шихтовых материалов при производстве стальных и чугунных труб, баллонов, тюбингов и радиаторов. Разработка УралНИТИ, утверждена МЧМ, 1978 г).Given that the weight of the pilgrim head depends on the hood on the pilgrim mill and the weight of the running meter of the rolled pipe
P = 0.2 (M drank + 0.33) ρ,
where P is the weight of the pilgrim head, kg;
M saw - extract on a pilgrim mill;
ρ is the weight of a running meter of the pipe, kg / m, and that the total hood is constant M = M pr , M saw , then an increase in hood at the piercing mill reduces the hood at the pilgrim mill and reduces the weight of the pilgrim head, and hence the metal consumption by
Figure 00000001

(Instructions for the regulation of metal and charge materials in the production of steel and cast iron pipes, cylinders, tubing and radiators. Development of UralNITI, approved by the MFM, 1978).

Осуществлять процесс прошивки с одной максимальной вытяжкой не дает ограничение длины выходной стороны прошивного стана, т.е. расстояние до упорной головки, поэтому предлагается максимальную вытяжку осуществлять на концевом участке гильзы соответствующей участку пилигримовой головки. Carrying out the firmware process with one maximum hood does not limit the length of the output side of the piercing mill, i.e. distance to the thrust head, therefore, it is proposed that the maximum hood be carried out at the end portion of the sleeve of the corresponding portion of the pilgrim head.

Сопоставительный анализ с прототипом показывает, что предлагаемый способ производства бесшовных труб на установках с пилигримовыми станами отличается тем, что прошивку слитка (заготовки) в гильзу осуществляют с разной вытяжкой Мпр и Мпр1, где максимальная вытяжка Мпр1, приходится на участок гильзы образующей пилигримовую головку.Comparative analysis with the prototype shows that the proposed method for the production of seamless pipes in plants with pilgrim mills is characterized in that the ingot (billet) is pierced into the sleeve with different hoods M pr and M pr1 , where the maximum hood M pr1 falls on the section of the core forming the pilgrim the head.

Таким образом, предлагаемый способ соответствует критерию изобретения "новизна". Thus, the proposed method meets the criteria of the invention of "novelty."

Сравнение предлагаемого решения не только с прототипом, но и с другими техническими решениями в данной области техники, не позволило выявить в них признаки, отличающие предлагаемое решение от прототипа, что позволяет сделать вывод о соответствии критерий "существенные отличия". Comparison of the proposed solution not only with the prototype, but also with other technical solutions in this technical field, did not allow us to identify in them the features that distinguish the proposed solution from the prototype, which allows us to conclude that the criterion of "significant differences".

Способ опробован на установке с пилигримовыми станами 8-16" ЧТПЗ. The method was tested on the installation with pilgrim mills 8-16 "ChTPZ.

Проведены сравнительные прокатки по существующей и предлагаемой технологиями из слитков 15'' и 16'' в трубы размером 377х9 мм и 426х9 мм из стали марки 20. Comparative rolling was carried out according to the existing and proposed technologies from 15 '' and 16 '' ingots into pipes of size 377x9 mm and 426x9 mm from steel of grade 20.

Процесс прошивки осуществляли следующим способом. The firmware process was carried out as follows.

Слитки прошивались с вытяжкой по существующей технологии до подхода заднего торца слитка к переднему торцу бочки рабочих валков, после чего производилось сведение валков на выходной стороне стана на 20-30 мм в зависимости от задаваемой вытяжки. The ingots were sewn with a hood according to existing technology until the rear end of the ingot approached the front end of the barrel of work rolls, after which rolls were reduced on the output side of the mill by 20-30 mm, depending on the set hood.

Разница при взвешивании пилигримовых головок, полученных при прокатке по существующей технологии, где вытяжка на прошивном стане для труб 377х9 мм и 426х9 мм равна, соответственно, 1,63 и 1,66 (при общей вытяжке 20,48 и 20,37) и по предлагаемой технологии, где вторая вытяжка на прошивном стане равнялась 1,97 и 1,96, составила для указанных типоразмеров - 35-40 кг, т.е. экономия металла на одной тонне труб составила 10-13 кг. The difference in weighing the pilgrim heads obtained by rolling according to the existing technology, where the hood on the piercing mill for pipes 377x9 mm and 426x9 mm, respectively, is 1.63 and 1.66 (with a total hood of 20.48 and 20.37) and of the proposed technology, where the second hood on the piercing mill was 1.97 and 1.96, for the indicated sizes - 35-40 kg, i.e. metal savings per tonne of pipes amounted to 10-13 kg.

Claims (1)

Способ пилигримовой прокатки, включающий нагрев слитка-заготовки, прошивку на стане поперечно-винтовой прокатки с вытяжкой Mпр, прокатку на пилигримовом стане с вытяжкой Mпил, отличающийся тем, что прошивку слитка-заготовки в гильзу осуществляют с разной вытяжкой по длине Mпр и Mпр1, где максимальная вытяжка Mпр1 приходится на участок гильзы, образующий пилигримовую головку.A method of pilgrim rolling, including heating an ingot billet, piercing on a cross-helical rolling mill with a hood M pr , rolling on a pilgrim mill with a hood M saws , characterized in that the piercing of the ingot billet into a sleeve is carried out with a different hood along the length M pr and M pr1 , where the maximum hood M pr1 falls on the portion of the liner forming the pilgrim head.
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2198751C2 (en) * 2000-12-06 2003-02-20 ОАО "Челябинский трубопрокатный завод" Method for helical piercing of ingots of electroslag and vacuum refining from low-ductile boron- containing steels
RU2214312C2 (en) * 2001-07-26 2003-10-20 ОАО "Челябинский трубопрокатный завод" Method for making tubes of hard-to-form steels and alloys with increased coefficient of linear expansion
RU2220793C2 (en) * 2001-12-13 2004-01-10 ОАО "Челябинский трубопрокатный завод" Method for making tubes with large and mean diameters in tube rolling plants with pilger mills
RU2226132C2 (en) * 2001-12-13 2004-03-27 ОАО "Челябинский трубопрокатный завод" Method for making seamless hot rolled conversion elongated tubes of hard-to-form kinds of steels and alloys
RU2243837C1 (en) * 2003-07-29 2005-01-10 ОАО "Челябинский трубопрокатный завод" Method for making hot-deformed seamless large-diameter tubes
RU2243836C2 (en) * 2003-02-06 2005-01-10 ОАО "Челябинский трубопрокатный завод" Method for piercing ingots in helical rolling mills
RU2261151C1 (en) * 2003-12-30 2005-09-27 ОАО "Челябинский трубопрокатный завод" Method for making seamless hot rolled tubes in tube rolling aggregates with pilger mills
RU2268796C2 (en) * 2003-07-29 2006-01-27 ОАО "Челябинский трубопрокатный завод" Method for making cone elongated hollow metallic products by hot rolling and apparatus for performing the same
RU2271259C1 (en) * 2004-06-02 2006-03-10 ОАО "Челябинский трубопрокатный завод" Method for making bimetallic wear-resistant tubes for transporting loose abrasive materials and pulps in tube rolling aggregates with pilger mills
RU2271258C1 (en) * 2004-06-02 2006-03-10 ОАО "Челябинский трубопрокатный завод" Method for producing bimetallic centrifugal-cast billets and bimetallic wear resistant tubes for transporting loose abrasive materials and pulps in tube rolling aggregates with pilger mills
RU2271888C2 (en) * 2004-06-02 2006-03-20 ОАО "Челябинский трубопрокатный завод" Method for producing cone elongated hollow metallic article by hot rolling
RU2271887C2 (en) * 2004-05-05 2006-03-20 ОАО "Челябинский трубопрокатный завод" Method for producing elongated cone hollow metallic articles by rolling process
RU2275978C2 (en) * 2004-06-02 2006-05-10 ОАО "Челябинский трубопрокатный завод" Method for making cone elongated hollow metallic articles by hot rolling
RU2275977C2 (en) * 2004-06-02 2006-05-10 ОАО "Челябинский трубопрокатный завод" Method for manufacturing seamless hot-deformed boiler tubes of large and mean diameters in tube rolling aggregates with pilger mills for steam boilers, steam conduits and manifolds of plants with high and supercritical parameters of steam from ingots of electroslag refining and continuously cast billets
RU2387497C2 (en) * 2008-04-18 2010-04-27 ОАО "Челябинский трубопрокатный завод" Fabrication method of seamless hot-deformed tubes of large and mean diametres from difficult-to-form grades of steel and alloys on tube-forming installation with pilger mills
RU2387498C2 (en) * 2008-04-18 2010-04-27 ОАО "Челябинский трубопрокатный завод" Fabrication method of seamless hot-deformed tubes of large and mean diametres on tube-forming installations with pilger mills
RU2523385C1 (en) * 2013-02-08 2014-07-20 Открытое акционерное общество "Челябинский трубопрокатный завод" Production of seamless hot-rolled pipes at pru with pilger mills
RU2522508C1 (en) * 2012-11-21 2014-07-20 Открытое акционерное общество "Челябинский трубопрокатный завод" Production of seamless hot-rolled pipes at pru with pilger mill

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2198751C2 (en) * 2000-12-06 2003-02-20 ОАО "Челябинский трубопрокатный завод" Method for helical piercing of ingots of electroslag and vacuum refining from low-ductile boron- containing steels
RU2214312C2 (en) * 2001-07-26 2003-10-20 ОАО "Челябинский трубопрокатный завод" Method for making tubes of hard-to-form steels and alloys with increased coefficient of linear expansion
RU2220793C2 (en) * 2001-12-13 2004-01-10 ОАО "Челябинский трубопрокатный завод" Method for making tubes with large and mean diameters in tube rolling plants with pilger mills
RU2226132C2 (en) * 2001-12-13 2004-03-27 ОАО "Челябинский трубопрокатный завод" Method for making seamless hot rolled conversion elongated tubes of hard-to-form kinds of steels and alloys
RU2243836C2 (en) * 2003-02-06 2005-01-10 ОАО "Челябинский трубопрокатный завод" Method for piercing ingots in helical rolling mills
RU2243837C1 (en) * 2003-07-29 2005-01-10 ОАО "Челябинский трубопрокатный завод" Method for making hot-deformed seamless large-diameter tubes
RU2268796C2 (en) * 2003-07-29 2006-01-27 ОАО "Челябинский трубопрокатный завод" Method for making cone elongated hollow metallic products by hot rolling and apparatus for performing the same
RU2261151C1 (en) * 2003-12-30 2005-09-27 ОАО "Челябинский трубопрокатный завод" Method for making seamless hot rolled tubes in tube rolling aggregates with pilger mills
RU2271887C2 (en) * 2004-05-05 2006-03-20 ОАО "Челябинский трубопрокатный завод" Method for producing elongated cone hollow metallic articles by rolling process
RU2271259C1 (en) * 2004-06-02 2006-03-10 ОАО "Челябинский трубопрокатный завод" Method for making bimetallic wear-resistant tubes for transporting loose abrasive materials and pulps in tube rolling aggregates with pilger mills
RU2271888C2 (en) * 2004-06-02 2006-03-20 ОАО "Челябинский трубопрокатный завод" Method for producing cone elongated hollow metallic article by hot rolling
RU2271258C1 (en) * 2004-06-02 2006-03-10 ОАО "Челябинский трубопрокатный завод" Method for producing bimetallic centrifugal-cast billets and bimetallic wear resistant tubes for transporting loose abrasive materials and pulps in tube rolling aggregates with pilger mills
RU2275978C2 (en) * 2004-06-02 2006-05-10 ОАО "Челябинский трубопрокатный завод" Method for making cone elongated hollow metallic articles by hot rolling
RU2275977C2 (en) * 2004-06-02 2006-05-10 ОАО "Челябинский трубопрокатный завод" Method for manufacturing seamless hot-deformed boiler tubes of large and mean diameters in tube rolling aggregates with pilger mills for steam boilers, steam conduits and manifolds of plants with high and supercritical parameters of steam from ingots of electroslag refining and continuously cast billets
RU2387497C2 (en) * 2008-04-18 2010-04-27 ОАО "Челябинский трубопрокатный завод" Fabrication method of seamless hot-deformed tubes of large and mean diametres from difficult-to-form grades of steel and alloys on tube-forming installation with pilger mills
RU2387498C2 (en) * 2008-04-18 2010-04-27 ОАО "Челябинский трубопрокатный завод" Fabrication method of seamless hot-deformed tubes of large and mean diametres on tube-forming installations with pilger mills
RU2522508C1 (en) * 2012-11-21 2014-07-20 Открытое акционерное общество "Челябинский трубопрокатный завод" Production of seamless hot-rolled pipes at pru with pilger mill
RU2523385C1 (en) * 2013-02-08 2014-07-20 Открытое акционерное общество "Челябинский трубопрокатный завод" Production of seamless hot-rolled pipes at pru with pilger mills

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