SU418234A1 - METHOD FOR PIPE ROLLING WITH TENSION ON THE REDUCTION MILL - Google Patents

METHOD FOR PIPE ROLLING WITH TENSION ON THE REDUCTION MILL

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Publication number
SU418234A1
SU418234A1 SU1284633A SU1284633A SU418234A1 SU 418234 A1 SU418234 A1 SU 418234A1 SU 1284633 A SU1284633 A SU 1284633A SU 1284633 A SU1284633 A SU 1284633A SU 418234 A1 SU418234 A1 SU 418234A1
Authority
SU
USSR - Soviet Union
Prior art keywords
tension
mandrel
reduction mill
pipe rolling
mill
Prior art date
Application number
SU1284633A
Other languages
Russian (ru)
Original Assignee
Ю. И. Блинов, М. А. Шубин, Ю. В. Самар нов , И. П. Макаров
Фонд Знооертов
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.)
Filing date
Publication date
Application filed by Ю. И. Блинов, М. А. Шубин, Ю. В. Самар нов , И. П. Макаров, Фонд Знооертов filed Critical Ю. И. Блинов, М. А. Шубин, Ю. В. Самар нов , И. П. Макаров
Priority to SU1284633A priority Critical patent/SU418234A1/en
Application granted granted Critical
Publication of SU418234A1 publication Critical patent/SU418234A1/en

Links

Description

Изобретение относитс  к производству труб на редукционных станах с нат жением. Известен способ прокатки труб с нат жением на редукционном стане, включаюодий деформацию заготовки без оправки в черновой и калибровочных группах клетей. Однако такой способ не устран ет полностью продольную разностенность и не предотвращает резкого торможени  трубы в процессе деформации утолщенных концов. С целью устранени  концевой разностенности предложен способ, по которому при деформации заготовки в предчистовой группе клетей ее концевые участки прокатывают на оправке, кроме того, дл  предотвращени  резкого торможени  трубы в процессе дефоргаации утолщенных концов оправку перемещают по ходу прокатки. На фиг. 1 показана схема, но сп юща/т предлагаемый способ (прохождение переднего утолщенного конца трубы); на фиг. 2 - прокатка средней части трубы. По мере прохождени  переднего конца трубы 1 через стан дл  предотвращени  резкого торможени  трубы в стане в момент деформировани  трубы на оправке 2, непосредственно еред началс.м деформировани , включают механизм перемегцени  оправки 3. После выхода переднего конца трубы 1 из стана оправку 2 с механизмом перемещени  3 возвращают в первоначальное положение и среднюю часть трубы прокатывают без оправки . Аналогично раскатывают и задний утолщенный конец. Предмет изобретени  1.Способ прокатки труб с нат жением на редукционно.м стане, включающий деформацию заготовки без оправки в черновой и калибровочных группах клетей, отличающийс  тем, что, с целью устранени  концевой разностенности, при деформации заготовки в нредчистовой группе клетей ее концевые участки ирокатывают на оправке. 2.Способ по и. 1, отлнчающийс  тем, что, с целью предотвращени  резкого торможени  трубы, в процессе деформации утолщенных концов оправку пepe eщaют по ходу прокптки.The invention relates to the manufacture of pipes for tensioned mills. There is a known method of rolling tubes with tension on a reduction mill, including deformation of the workpiece without a mandrel in the roughing and gauge groups of the stands. However, this method does not completely eliminate the longitudinal difference in wall thickness and does not prevent the pipe from abruptly braking during the deformation of the thickened ends. In order to eliminate the end difference, a method has been proposed in which, when the workpiece is deformed in the pre-finishing group of stands, its end sections are rolled on a mandrel, moreover, to prevent the tube from sharply slowing down during the process of deforming the thickened ends, the mandrel is moved during rolling. FIG. 1 shows the scheme, but the sleeping / t proposed method (passing the front thickened end of the pipe); in fig. 2 - rolling the middle part of the pipe. As the front end of the tube 1 passes through the mill to prevent the tube in the mill from abruptly deforming on the mandrel 2, the deformity of the mandrel 3 is immediately before the deformation of the tube 3. After the front end of the tube 1 leaves the mill, the mandrel 2 with the displacement mechanism 3 return to its original position and roll the middle part of the pipe without a mandrel. Similarly, they roll out the rear thickened end. The subject of the invention 1. A method of rolling tubes with a tension on a reduction mill, including the deformation of a blank without a mandrel in roughing and gauge stands, characterized in that, in order to eliminate the end scaling, when the blank is deformed in a non-crimping stand group, its end sections and the rolls on the mandrel. 2. Method for and. 1, in that, in order to prevent the pipe from braking abruptly, in the process of deforming the thickened ends, the mandrel is prevented from moving along the prokpt.

Фиг. 2.FIG. 2

SU1284633A 1968-11-23 1968-11-23 METHOD FOR PIPE ROLLING WITH TENSION ON THE REDUCTION MILL SU418234A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1284633A SU418234A1 (en) 1968-11-23 1968-11-23 METHOD FOR PIPE ROLLING WITH TENSION ON THE REDUCTION MILL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1284633A SU418234A1 (en) 1968-11-23 1968-11-23 METHOD FOR PIPE ROLLING WITH TENSION ON THE REDUCTION MILL

Publications (1)

Publication Number Publication Date
SU418234A1 true SU418234A1 (en) 1974-03-05

Family

ID=20443850

Family Applications (1)

Application Number Title Priority Date Filing Date
SU1284633A SU418234A1 (en) 1968-11-23 1968-11-23 METHOD FOR PIPE ROLLING WITH TENSION ON THE REDUCTION MILL

Country Status (1)

Country Link
SU (1) SU418234A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0430909A2 (en) * 1989-11-30 1991-06-05 DALMINE S.p.A. Improved hot-rolling process for sealess tubes with preliminary diameter reduction of the semifinished products

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0430909A2 (en) * 1989-11-30 1991-06-05 DALMINE S.p.A. Improved hot-rolling process for sealess tubes with preliminary diameter reduction of the semifinished products
EP0430909A3 (en) * 1989-11-30 1991-10-02 Dalmine S.P.A. Improved hot-rolling process for sealess tubes with preliminary diameter reduction of the semifinished products

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