CN1309495C - Inner press roller roll type outline matching screw tube blank - Google Patents

Inner press roller roll type outline matching screw tube blank Download PDF

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Publication number
CN1309495C
CN1309495C CNB021329036A CN02132903A CN1309495C CN 1309495 C CN1309495 C CN 1309495C CN B021329036 A CNB021329036 A CN B021329036A CN 02132903 A CN02132903 A CN 02132903A CN 1309495 C CN1309495 C CN 1309495C
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CN
China
Prior art keywords
inner press
roll
press roll
pipes
throw
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Expired - Fee Related
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CNB021329036A
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Chinese (zh)
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CN1408488A (en
Inventor
白忠泉
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Individual
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Individual
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Priority to CNB021329036A priority Critical patent/CN1309495C/en
Publication of CN1408488A publication Critical patent/CN1408488A/en
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Publication of CN1309495C publication Critical patent/CN1309495C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Bending Of Plates, Rods, And Pipes (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Abstract

The present invention relates to an inner press roller which has a roller-shaped contour line and is matched with a spiral pipe blank. The present invention is characterized in that the equation of the roller-shaped curve is disclosed in the specification. Because in the present invention, the line contact is realized, the disadvantage of wavy bent impressions generated by pipes because of an inappropriate roller shape can be avoided, and thus, the quality of the pipes is improved. The reduction of the wavy bent impressions of pipes is also favorable to the anti-corrosion treatment of the pipes, and is favorable to reduction of pipeline transporting resistance; moreover, strip steel can be evenly deformed in a forming and bending process, the consistency of the distribution of the internal stress of the base metals of steel pipes is improved, and the inherent quality of the steel pipes is improved.

Description

A kind of have an inner press roll that roll forming outline line and spiral pipe match
(1) technical field
The present invention relates to the inner press roll in a kind of spiral welded steel pipe shaped device.
(2) technical background
In the spiral welded pipe product, often can see and exist the curved impression of wave on the body of some tubing, the curved impression of this wave belongs to makes shortcoming, causing the immediate cause of the curved impression shortcoming of tubing wave is the unreasonable of shaped device inner press roll roll forming in the manufacture process, in the prior art, the inner press roll roll forming can only adopt comparison method to determine, the such result often roll forming gap with desirable is bigger, after the straight band steel of certain width is sent shaped device in a certain direction, the roller group of stressed maximum is an inner press roll in the shaped device, because the design of the roll forming of inner press roll is unreasonable, cause inner press roll to contact with spiral pipe point, make the band steel produce stress and concentrate, thereby cause pipe to produce the curved impression shortcoming of wave.
(3) summary of the invention
The technical problem to be solved in the present invention provides a kind of inner press roll that roll forming outline line and spiral pipe match that has, and this moulding inner press roll can avoid because some contact and the curved impression shortcoming of wave that pipe is produced.
The technical scheme that adopts
A kind of inner press roll that roll forming outline line and spiral pipe match that has of the present invention; Its technical characterstic is that this inner press roll has the roll forming that contacts with spiral pipe retention wire.This roll forming is determined by roll shape curve.Because the shape of inner press roll roll shape curve is generally circular-arc, thus the roll shape curve of inner press roll can be determined by the roll shape curve radius of inner press roll, that is:
R Female=(R Throw-R Half* Sin 2α In)/cos 2α In
Wherein: R Female---be the roll shape curve radius of inner press roll
R Throw---be inner press roll roll surface projection (roll forming profile) radius
R Half---be the radius of inner press roll
α In---be the setting angle of inner press roll
R Throw=R In
R In---be the inside radius of spiral pipe
According to formula R Female=(R Throw-R Half* Sin 2α In)/cos 2α In, at known parameters R Half, α In, R InThe time, in the time of can determining that just inner press roll contacts with spiral pipe line, i.e. R Throw=R InThe time inner press roll the roll shape curve radius R FemaleR FemaleAfter determining, the roll forming of inner press roll is just definite.
The present invention can also verify the applicability of known roll forming, at inner press roll roll shape curve radius R Female, inner press roll radius R HalfAnd the setting angle α of inner press roll InDuring for known parameters, can determine that also inner press roll and pipe are line R when contacting Throw=R InThe time, the inside radius R of the spiral pipe that is suitable for In, that is:
R In=R Throw=R Half* Sin 2α In+ R Female* cos 2α In
The present invention has been owing to realized the line contact, can avoid making owing to roll forming is improper the shortcoming of the curved impression of wave that tubing produces, the quality of raising tubing.The minimizing of the curved impression of tubing wave also helps the preservative treatment of tubing, helps reducing the pipeline transporting resistance.
The present invention can make the distortion in the curved process of giving of moulding of band steel evenly improve the uniformity of steel pipe mother metal internal stress distribution owing to realized the line contact, improves the inherent quality of steel pipe.
(4) description of drawings
Fig. 1 is the principle schematic of shaped device.Fig. 2 is the operating position present situation sketch of inner press roll.The operating position sketch of Fig. 3 for contacting with spiral pipe line by inner press roll of the present invention.Fig. 4 is the vertical view of inner press roll operating position.
(5) specific embodiment
Embodiment one
The roll shape curve of inner press roll 1 can determine by inner press roll roll shape curve radius, that is:
R Female=(R Throw-R Half* Sin 2α In)/cos 2α In, according to the technological parameter of spiral welded pipe product, as the known conditions of present embodiment.
The inside radius R of known helical pipe 2 In=400mm, interior moulding angle [alpha] In=60 degree, the radius R of inner press roll 1 Half=75mm, because the inner press roll 1 of manufacturing and spiral pipe 2 be for line contacts, R then Throw=R In=400mm, in view of the above as can be known:
R Female=(400-75 * Sin 260)/cos 260=1375 (mm)
Embodiment two
Embodiment two is under the situation that the roll shape curve of inner press roll 1 is determined, verifies the applicability of known roll forming.
The radius R of known inner press roll roll shape curve FemaleBe 200mm, setting angle is 40 degree, and diameter is 150mm.Make R In=R ThrowThe contact of realization line, then R InCan pass through equation R In=R Half* Sin 2α In+ R Female* cos 2α In, draw:
R In=75 * Sin 240+200 * cos 240=148 (mm).
Hence one can see that, and when the radius of inner press roll roll shape curve was 200mm, the radius that the realization line contacts determined spiral pipe 2 was 148mm.

Claims (1)

1, a kind of have an inner press roll that roll forming outline line and spiral pipe match, and it is characterized in that the equation of this roller roll shape curve is: R Female=(R Throw-R Half* Sin 2α In)/cos 2α In, R Throw=R In
R Female=(R Throw-R Half* Sin 2α In)/cos 2α In
Wherein: R Female---be the roll shape curve radius of inner press roll
R Throw---be inner press roll roll surface projection radius
R Half---be the radius of inner press roll
α In---be the setting angle of inner press roll
R Throw=R In
R In---be the inside radius of spiral pipe.
CNB021329036A 2002-09-10 2002-09-10 Inner press roller roll type outline matching screw tube blank Expired - Fee Related CN1309495C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB021329036A CN1309495C (en) 2002-09-10 2002-09-10 Inner press roller roll type outline matching screw tube blank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB021329036A CN1309495C (en) 2002-09-10 2002-09-10 Inner press roller roll type outline matching screw tube blank

Publications (2)

Publication Number Publication Date
CN1408488A CN1408488A (en) 2003-04-09
CN1309495C true CN1309495C (en) 2007-04-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNB021329036A Expired - Fee Related CN1309495C (en) 2002-09-10 2002-09-10 Inner press roller roll type outline matching screw tube blank

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CN (1) CN1309495C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113943906A (en) * 2021-10-16 2022-01-18 江苏晟恒智能装备有限公司 Deep-cooling micro-rolling strengthening method for inner wall of circular pipe

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01186205A (en) * 1988-01-22 1989-07-25 Nippon Steel Corp Mandrel mill for manufacturing seamless steel tube
SU1502145A1 (en) * 1987-12-23 1989-08-23 Уральский научно-исследовательский институт трубной промышленности Breakdown pass for lengthwise rolling of tubes
US4895011A (en) * 1989-03-20 1990-01-23 Ceeco Machinery Mfg. Co. Inc., Ltd. Continuously balanced apparatus for storing and dispensing elongate materials
DE3924261A1 (en) * 1989-07-20 1991-01-31 Mannesmann Ag Groove contour on three roller reducing mill for e.g. pipe - is shaped to prevent unwanted deformation on inside contour of pipe
CN1047113C (en) * 1994-03-07 1999-12-08 东北重型机械学院南校 Spiral-weld tube formation extruding machine
CN1266387A (en) * 1997-05-14 2000-09-13 阿尔文工业公司 Spiral-formed exhaust tube
CN1319169A (en) * 1998-09-22 2001-10-24 里洛克澳大利亚有限公司 Method and apparatus for winding helical pipe from its inside
CN2471441Y (en) * 2001-01-03 2002-01-16 朱庆君 Shaping roller

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1502145A1 (en) * 1987-12-23 1989-08-23 Уральский научно-исследовательский институт трубной промышленности Breakdown pass for lengthwise rolling of tubes
JPH01186205A (en) * 1988-01-22 1989-07-25 Nippon Steel Corp Mandrel mill for manufacturing seamless steel tube
US4895011A (en) * 1989-03-20 1990-01-23 Ceeco Machinery Mfg. Co. Inc., Ltd. Continuously balanced apparatus for storing and dispensing elongate materials
DE3924261A1 (en) * 1989-07-20 1991-01-31 Mannesmann Ag Groove contour on three roller reducing mill for e.g. pipe - is shaped to prevent unwanted deformation on inside contour of pipe
CN1047113C (en) * 1994-03-07 1999-12-08 东北重型机械学院南校 Spiral-weld tube formation extruding machine
CN1266387A (en) * 1997-05-14 2000-09-13 阿尔文工业公司 Spiral-formed exhaust tube
CN1319169A (en) * 1998-09-22 2001-10-24 里洛克澳大利亚有限公司 Method and apparatus for winding helical pipe from its inside
CN2471441Y (en) * 2001-01-03 2002-01-16 朱庆君 Shaping roller

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Granted publication date: 20070411