SU816588A1 - Method of helical expanding of tubes - Google Patents
Method of helical expanding of tubes Download PDFInfo
- Publication number
- SU816588A1 SU816588A1 SU792775997A SU2775997A SU816588A1 SU 816588 A1 SU816588 A1 SU 816588A1 SU 792775997 A SU792775997 A SU 792775997A SU 2775997 A SU2775997 A SU 2775997A SU 816588 A1 SU816588 A1 SU 816588A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- pipe
- rolls
- revolutions
- tubes
- rear end
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 8
- 238000005096 rolling process Methods 0.000 claims description 8
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009785 tube rolling Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Description
1one
Изобретение относитс к трубопрокатному производству, а более конкретно к способам гор чей прокатки бесшовных труб в трехвалковых косовалковых раскатных станах.The invention relates to pipe production, and more specifically to methods for the hot rolling of seamless pipes in three-roll rolls.
Известен способ прокатки труб в раскатном стане, заключающийс в деформации трубы трем приводными вгшкгши , при котором угол подачи вашков , диаметр калибра и число оборо тов валков посто нны в течение всего процесса 1 .There is a known method of rolling tubes in a rolling mill, which consists in deforming the tube with three driven inlets, at which the feed angle of the washers, the diameter of the caliber and the number of revolutions of the rolls are constant during the whole process 1.
Недостаток данного способа прокатки заключаетс в образовании концевы дефектов в виде шейки на згшних концах труб.The disadvantage of this rolling method is the formation of end defects in the form of a neck at the ends of the tubes.
Наиболее близким к предлагаемому вл етс способ поперечно-винтовой прокатки, включающий деформацию трубы приводными валками, имеющими гребень на оправке, и уменьшение числа оборотов валков при прокатке заднего конца трубы по отношению к их величине при прокатке центральной части заготовки Г2 .The closest to the present invention is the method of cross-helical rolling, which includes the deformation of the pipe by drive rollers having a ridge on the mandrel, and a decrease in the number of revolutions of the rolls when rolling the rear end of the pipe relative to their size when rolling the central part of the workpiece G2.
Недостаток известного способа заключаетс в том, что уменьшение числа оборотов валков при прокатке задних концов труб в трехвалковом раскатном стане не позвол ет избежатьThe disadvantage of this method is that the reduction in the number of revolutions of the rolls during the rolling of the rear ends of the tubes in a three-roll mill does not allow to avoid
по влени шейки на задних концах труб, а наоборот, приводит к дополнительной их посадке по диаметру.the appearance of the neck at the rear ends of the pipes, and vice versa, leads to their additional fit in diameter.
Цель изобретени - стабилизаци геометрических размеров по длине трубы . The purpose of the invention is to stabilize the geometric dimensions along the length of the pipe.
Поставленна цель достигаетс согласно способу винтовой раскатки труб, включаннцему деформацию трубы The goal is achieved according to the method of tube rolling, including the deformation of the pipe
0 приводными валказл , имеющими гребень на оправке, и изменение числа оборотов валков при деформации заднего конца трУбы, с момента контакта заднего торца трубы с валками до подхо5 ди его .к гребню увеличивают число оборотов валков на 20-30%, а затем снижают до величины, составл ющей 10-30% от числа оборотов валков при деформации основной части трубы.0 driven valkazl, having a ridge on the mandrel, and the change in the number of revolutions of the rolls during deformation of the rear end of the pipe, from the moment of contact of the rear end of the pipe with the rolls to approach 5, increase the number of revolutions of the rolls to the ridge by 20-30%, and then reduce to 10-30% of the number of revolutions of the rolls during deformation of the main part of the pipe.
00
Шейка на заднем конце трубы представл ет собой последовательное уменьшение , а затем возрастание толщины стенки и диаметра трубы. Начало шейки соответствует моменту соприкос5 новени заднего торца заготовки с поверхностью валков, а увеличение толщины стенки и диаметра в пределах шейки (у торца трубы) начинаетс с момента соприкосновени згщнего торца заготовки с гребнем залков.The neck at the rear end of the tube is a gradual reduction and then an increase in wall thickness and tube diameter. The beginning of the neck corresponds to the moment of contact between the rear end of the workpiece and the surface of the rolls, and the increase in wall thickness and diameter within the neck (at the pipe end) begins from the moment the contact end of the workpiece contacts the crest of the legs.
00
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792775997A SU816588A1 (en) | 1979-06-07 | 1979-06-07 | Method of helical expanding of tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792775997A SU816588A1 (en) | 1979-06-07 | 1979-06-07 | Method of helical expanding of tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU816588A1 true SU816588A1 (en) | 1981-03-30 |
Family
ID=20831921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU792775997A SU816588A1 (en) | 1979-06-07 | 1979-06-07 | Method of helical expanding of tubes |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU816588A1 (en) |
-
1979
- 1979-06-07 SU SU792775997A patent/SU816588A1/en active
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