RU2011108829A - METHOD FOR MAKING FORGES OF LARGE-SIZED SEMI-HOUSES OF BALL VALVES FROM STEEL CENTRIFUGAL AND FORGED PIPES - Google Patents

METHOD FOR MAKING FORGES OF LARGE-SIZED SEMI-HOUSES OF BALL VALVES FROM STEEL CENTRIFUGAL AND FORGED PIPES Download PDF

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Publication number
RU2011108829A
RU2011108829A RU2011108829/02A RU2011108829A RU2011108829A RU 2011108829 A RU2011108829 A RU 2011108829A RU 2011108829/02 A RU2011108829/02 A RU 2011108829/02A RU 2011108829 A RU2011108829 A RU 2011108829A RU 2011108829 A RU2011108829 A RU 2011108829A
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RU
Russia
Prior art keywords
semi
thickness
punch
finished product
forgings
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RU2011108829/02A
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Russian (ru)
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RU2491147C2 (en
Inventor
Алексей Эдуардович Артес (RU)
Алексей Эдуардович Артес
Владислав Алексеевич Сорокин (RU)
Владислав Алексеевич Сорокин
Николай Павлович Петров (RU)
Николай Павлович Петров
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Открытое акционерное общество "Тяжпрессмаш" (RU)
Открытое Акционерное Общество "Тяжпрессмаш"
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Priority to RU2011108829/02A priority Critical patent/RU2491147C2/en
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Abstract

Способ получения поковок полукорпусов, включающий использование в качестве исходных заготовок стальные центробежнолитые и кованые трубы, нагреваемые до 1150°-1200°С, отличающийся тем, что сначала осуществляют операцию горячего прямого выдавливания в штампе с получением полуфабриката с меньшей от начальной толщины (на 25-30%) трубы, примерно равной толщине нижней сферической части готовой поковки, при этом сила выдавливания снижается за счет исключения действия сил трения на подвижной оправке, скользящей в пуансоне, а затем после второго нагрева ведут штамповку полуфабриката во втором штампе методом обжима верхней части (горловины) с одновременной раздачей нижней части с увеличением на сферическом нижнем пуансоне наружного диаметра поковки не менее чем на 10%, при этом металл поковки прилегающий к нижнему пуансону быстро охлаждается, повышая устойчивость процесса обжима. A method of producing forgings of half-shells, including the use of steel centrifugal cast and forged pipes heated to 1150 ° -1200 ° С as initial billets, characterized in that the operation of direct hot extrusion in a stamp is first performed to obtain a semi-finished product with a smaller thickness from the initial thickness (25- 30%) of the pipe, approximately equal to the thickness of the lower spherical part of the finished forgings, while the extrusion force is reduced due to the exclusion of the friction forces on the movable mandrel sliding in the punch, and then after the second heating EVA are stamping the semi-finished product in the second die by crimping the upper part (neck) with the simultaneous distribution of the lower part with an increase in the outer diameter of the forging on the spherical lower punch by at least 10%, while the forging metal adjacent to the lower punch is rapidly cooled, increasing the stability of the crimping process .

Claims (1)

Способ получения поковок полукорпусов, включающий использование в качестве исходных заготовок стальные центробежнолитые и кованые трубы, нагреваемые до 1150°-1200°С, отличающийся тем, что сначала осуществляют операцию горячего прямого выдавливания в штампе с получением полуфабриката с меньшей от начальной толщины (на 25-30%) трубы, примерно равной толщине нижней сферической части готовой поковки, при этом сила выдавливания снижается за счет исключения действия сил трения на подвижной оправке, скользящей в пуансоне, а затем после второго нагрева ведут штамповку полуфабриката во втором штампе методом обжима верхней части (горловины) с одновременной раздачей нижней части с увеличением на сферическом нижнем пуансоне наружного диаметра поковки не менее чем на 10%, при этом металл поковки прилегающий к нижнему пуансону быстро охлаждается, повышая устойчивость процесса обжима. A method of producing forgings of half-shells, including the use of steel centrifugal cast and forged pipes heated to 1150 ° -1200 ° С as initial billets, characterized in that the operation of direct hot extrusion in a stamp is first performed to obtain a semi-finished product with a smaller thickness from the initial thickness (25- 30%) of the pipe, approximately equal to the thickness of the lower spherical part of the finished forgings, while the extrusion force is reduced due to the exclusion of the friction forces on the movable mandrel sliding in the punch, and then after the second heating EVA are stamping the semi-finished product in the second die by crimping the upper part (neck) with the simultaneous distribution of the lower part with an increase in the outer diameter of the forging on the spherical lower punch by at least 10%, while the forging metal adjacent to the lower punch is rapidly cooled, increasing the stability of the crimping process .
RU2011108829/02A 2011-03-09 2011-03-09 Method of forging large-sized half-bodies of ball valves with throat and spherical part RU2491147C2 (en)

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RU2011108829/02A RU2491147C2 (en) 2011-03-09 2011-03-09 Method of forging large-sized half-bodies of ball valves with throat and spherical part

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RU2011108829/02A RU2491147C2 (en) 2011-03-09 2011-03-09 Method of forging large-sized half-bodies of ball valves with throat and spherical part

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RU2011108829A true RU2011108829A (en) 2012-09-20
RU2491147C2 RU2491147C2 (en) 2013-08-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2527518C1 (en) * 2013-03-01 2014-09-10 Закрытое акционерное общество Научно-производственное объединение "Тяжпромарматура" Ball valve semi-body with flange and method of its production

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RU2597852C2 (en) * 2014-05-14 2016-09-20 Закрытое акционерное общество Научно-производственное объединение "Тяжпромарматура" Ball valve half-body and preparation method thereof
CN107443018A (en) * 2017-08-07 2017-12-08 丹阳市云孚科技有限公司 A kind of pressure volume pot production equipment and production method
RU2706395C1 (en) * 2018-08-23 2019-11-18 Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технологический университет "СТАНКИН" (ФГБОУ ВО "МГТУ "СТАНКИН") Method of manufacturing large-size forgings of half-cases of ball valves
RU2706392C1 (en) * 2018-08-23 2019-11-18 Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технологический университет "СТАНКИН" (ФГБОУ ВО "МГТУ "СТАНКИН") Method of manufacturing large-size forgings of half-cases of ball valves

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1238876A1 (en) * 1983-03-29 1986-06-23 Камский политехнический институт Method of producing hollow ball pins (its versions)
SU1189563A1 (en) * 1984-07-06 1985-11-07 Научно-Производственное Объединение По Технологии Машиностроения "Цниитмаш" Die for making hollow articles ,particularly, of spherical shape
RU2157290C2 (en) * 1998-08-03 2000-10-10 Открытое акционерное общество "Тамбовский завод "КОМСОМОЛЕЦ" Method for making hollow spherical products with through tubular duct

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2527518C1 (en) * 2013-03-01 2014-09-10 Закрытое акционерное общество Научно-производственное объединение "Тяжпромарматура" Ball valve semi-body with flange and method of its production

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Effective date: 20170310