SU772621A1 - Method of helical expanding of tubes - Google Patents
Method of helical expanding of tubes Download PDFInfo
- Publication number
- SU772621A1 SU772621A1 SU792747766A SU2747766A SU772621A1 SU 772621 A1 SU772621 A1 SU 772621A1 SU 792747766 A SU792747766 A SU 792747766A SU 2747766 A SU2747766 A SU 2747766A SU 772621 A1 SU772621 A1 SU 772621A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- rolls
- rolling
- rear end
- sleeve
- tubes
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 7
- 238000005096 rolling process Methods 0.000 claims description 13
- 238000013459 approach Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009966 trimming 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 обработке меташлов. давлением, а также к трубопрокатном . производству и касаетс гор чей прокатки бесшовных труб в косовсшковах раскатных станах. 5This invention relates to the processing of metachlores. pressure, as well as to the pipe rolling. to the production and concern of hot rolling of seamless pipes in Kosovo roll mills. five
Известен способ, раскатки труб в косовалковом раскатном стане, включающий деформацию с изменением рассто ни мезвду валками, которое осуществл ют при деформировании задне- О го конца ги.пьзы сближением валков до величины, составл ющей 0,95-0,99 рассто ни между валками в установившийс 1 ериод раскатки 1.There is a known method of tube rolling in a rolling roller mill, including the deformation with a change in the distance of the mezvuda rolls, which is carried out when the rear end of the hype is deformed by approaching the rolls to a value of 0.95-0.99 between the rolls in established 1 period of rolling 1.
Недостатком данного способа прока-МЗ ки вл етс образование концевых дефектов в виде шей1{и на задних концах труб.The disadvantage of this proc-mZi method is the formation of end defects in the form of shey1 and at the rear ends of the pipes.
Наиболее близким к изобретению по технической сущности вл етс спсюоб JQ ВИНТОВОЙ раскатки труб, включающий деформацию гильзы трем валками с гребн ми на оправке при посто нном растворе между валкги ш до подхода заднего конца и затем увеличение рассто З ни между валками при прокатке заднего конца 2.The closest to the invention to the technical essence is the JQ SPRING rolling of tubes, including the deformation of the sleeve with three rollers with ridges on the mandrel at a constant solution between the roller until the rear end approaches and then increasing the distance between the rollers when rolling the rear end 2.
Заднип конец трубы, прокатанной по данному способу, имеет несколько утолщенную стеик% по сравнению с остешь- 30The back end of the pipe rolled by this method has a slightly thickened steak% as compared to 30
ной частью трубы. Дефект не устран етс последующей прокаткой в редукционном или калиброванном стане, что приводит к повышению обрези.Noah part of the pipe. The defect is not eliminated by subsequent rolling in a reduction or calibrated mill, which leads to an increase in trimming.
Цель изобретени - сокращение концевой обрези.The purpose of the invention is to reduce the end trim.
Поставленна цель достигаетс тем, что согласно способу винтовой раскатки труб, вк.пючан цему деформацию гильзы трем валками с гребн ми на оправке при посто нном растворе между валками до подхода заднего конца и затем увеличение рассто ни между валками при прокатке заднего конца, с момента соприкосновени заднего торца гильзы с поверхнхэстью гребн валков до ет выхода из зоны действи валков осуществл ют сведение валков в направлении оси прокатки.The goal is achieved in that according to the method of helical rolling of tubes, the sleeve deforms the sleeve with three rollers with ridges on the mandrel when the solution between the rollers is constant until the rear end approaches and then the distance between the rollers increases when the rear end is rolled the rear end of the liner with the surface of the ridge of the rolls reaches the exit from the zone of action of the rolls, rolls are rolled in the direction of the rolling axis.
Способ позво.а ет компенсировать возникаиоцие в процессе прокатки колеба .нй толщины стенки, св занные с действием раст гивающих напр жений от инерционных сил, возникгш дих в момент окончани процесса прокатки. Действие раст гивающих напр жений приводит к утонению стенки трубы, причем их воЗ никновение соответствует моменту соприкосновени заднего торца гильзы с поверхностью валков, т.е. исчезновеThe method makes it possible to compensate for the occurrence during rolling of the oscillating wall thickness associated with the action of tensile stresses from inertial forces that occurred at the time of the end of the rolling process. The action of tensile stresses leads to a thinning of the pipe wall, and their appearance corresponds to the moment when the rear end of the liner contacts the surface of the rolls, i.e. disappear
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792747766A SU772621A1 (en) | 1979-04-06 | 1979-04-06 | Method of helical expanding of tubes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792747766A SU772621A1 (en) | 1979-04-06 | 1979-04-06 | Method of helical expanding of tubes |
Publications (1)
Publication Number | Publication Date |
---|---|
SU772621A1 true SU772621A1 (en) | 1980-10-23 |
Family
ID=20819979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU792747766A SU772621A1 (en) | 1979-04-06 | 1979-04-06 | Method of helical expanding of tubes |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU772621A1 (en) |
-
1979
- 1979-04-06 SU SU792747766A patent/SU772621A1/en active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SU772621A1 (en) | Method of helical expanding of tubes | |
JPS56141902A (en) | Method and apparatus for manufacturing seamless pipe by mandrel hot rolling | |
SU804022A1 (en) | Method of producing sleeves on skew-roll mill | |
SU655441A1 (en) | Helical tube-rolling method | |
SU1077675A1 (en) | Roll for pilger rolling | |
RU2009739C1 (en) | Method of cross-screw piercing | |
JPH0333405B2 (en) | ||
SU615965A1 (en) | Tube manufacturing method | |
SU452391A1 (en) | Pipe Straightening Method | |
SU871856A1 (en) | Method of continuous rolling of tubes | |
SU418234A1 (en) | METHOD FOR PIPE ROLLING WITH TENSION ON THE REDUCTION MILL | |
SU806218A1 (en) | Method of longitudinal rolling of waved-section tubes | |
SU816588A1 (en) | Method of helical expanding of tubes | |
SU804015A1 (en) | Method of continuous strip rolling | |
SU685371A1 (en) | Method of helical rolling of tubes in three-high mill | |
SU707622A1 (en) | Method of rolling flanged profiles | |
JP3624235B2 (en) | Method for controlling the drawing and rolling of steel pipes | |
SU1438867A1 (en) | Mandrel device for pilger mill | |
SU740317A1 (en) | Helical piercing method | |
SU366899A1 (en) | METHOD OF HOT PILER PILED ROLLING | |
JPS57103702A (en) | Production of ribbed h-steel | |
SU498991A1 (en) | The method of automatic control kosovalkovy piercing mill | |
SU770581A1 (en) | Method of producing tubes in pilger mill installation | |
SU707662A1 (en) | Method of making shaped profiles | |
RU2067507C1 (en) | Method for screw rolling of pipes |