FR2455927A1 - Seamless tubes with large dia.-wall thickness ratio - made on continuous rolling line which includes tube expanding unit - Google Patents

Seamless tubes with large dia.-wall thickness ratio - made on continuous rolling line which includes tube expanding unit

Info

Publication number
FR2455927A1
FR2455927A1 FR7911455A FR7911455A FR2455927A1 FR 2455927 A1 FR2455927 A1 FR 2455927A1 FR 7911455 A FR7911455 A FR 7911455A FR 7911455 A FR7911455 A FR 7911455A FR 2455927 A1 FR2455927 A1 FR 2455927A1
Authority
FR
France
Prior art keywords
tube
continuous rolling
wall thickness
dia
thickness ratio
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
FR7911455A
Other languages
French (fr)
Inventor
Jacques Verdickt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vallourec SA
Original Assignee
Vallourec SA
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 Vallourec SA filed Critical Vallourec SA
Priority to FR7911455A priority Critical patent/FR2455927A1/en
Priority to DE19803015265 priority patent/DE3015265A1/en
Priority to IT1980A09422A priority patent/IT8009422A1/en
Priority to IT09422/80A priority patent/IT1153809B/en
Priority to BR8002791A priority patent/BR8002791A/en
Priority to JP5954680A priority patent/JPS55149709A/en
Publication of FR2455927A1 publication Critical patent/FR2455927A1/en
Pending legal-status Critical Current

Links

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
    • B21B19/08—Enlarging tube diameter

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Extraction Processes (AREA)

Abstract

The plant includes a continuous rolling mill followed by a tube widening unit (I) and then a finishing mill for calibrating or reducing the tube. Unit (I) includes a pair of profiled discs which rotate in opposite directions and between which is a rotary, conical mandrel used with the discs to reduce and then increase the dia. of the tube leaving the continuous mill. Both discs are eccentric w.r.t. the axis of the tube. The entry angle (Oe) of the tube into unit (I) is pref. 1.5-3 degrees, whereas its exit angle (Os) is pref. 4-9 degrees, esp. 4-6 degrees. The max. tube dia. which can be obtd. from a continuous prodn. line can be increased at relatively low investment cost.
FR7911455A 1979-05-07 1979-05-07 Seamless tubes with large dia.-wall thickness ratio - made on continuous rolling line which includes tube expanding unit Pending FR2455927A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR7911455A FR2455927A1 (en) 1979-05-07 1979-05-07 Seamless tubes with large dia.-wall thickness ratio - made on continuous rolling line which includes tube expanding unit
DE19803015265 DE3015265A1 (en) 1979-05-07 1980-04-21 METHOD AND DEVICE FOR PRODUCING SEAMLESS TUBES WITH A LARGE RATIO FROM DIAMETER TO THICKNESS
IT1980A09422A IT8009422A1 (en) 1979-05-07 1980-05-06 MANUFACTURE OF SEAMLESS PIPES WITH A STRONG DIAMETER-THICKNESS RATIO
IT09422/80A IT1153809B (en) 1979-05-07 1980-05-06 MANUFACTURE OF PIPES WITHOUT WELDING WITH STRONG DIAMETER-THICKNESS RATIO
BR8002791A BR8002791A (en) 1979-05-07 1980-05-06 INSTALLATION AND MANUFACTURING PROCESS OF SEAMLESS TUBES
JP5954680A JPS55149709A (en) 1979-05-07 1980-05-07 Method and device for manufacturing seamless pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7911455A FR2455927A1 (en) 1979-05-07 1979-05-07 Seamless tubes with large dia.-wall thickness ratio - made on continuous rolling line which includes tube expanding unit

Publications (1)

Publication Number Publication Date
FR2455927A1 true FR2455927A1 (en) 1980-12-05

Family

ID=9225125

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7911455A Pending FR2455927A1 (en) 1979-05-07 1979-05-07 Seamless tubes with large dia.-wall thickness ratio - made on continuous rolling line which includes tube expanding unit

Country Status (5)

Country Link
JP (1) JPS55149709A (en)
BR (1) BR8002791A (en)
DE (1) DE3015265A1 (en)
FR (1) FR2455927A1 (en)
IT (2) IT8009422A1 (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE128263C (en) *
FR411655A (en) * 1910-01-18 1910-06-22 Verwertung Von Rohrwalz Patent Method and device for the manufacture of seamless tubes, drawn from hollow blocks
FR555725A (en) * 1922-09-06 1923-07-05 Apparatus for expanding metal tubes
FR636849A (en) * 1927-06-30 1928-04-17 Mannesmannrohren Verke Oblique rolling device for flaring metal pipes
FR703320A (en) * 1929-10-05 1931-04-28 Mannes Mannrohren Werke Seamless pipe manufacturing process
US2025146A (en) * 1933-03-14 1935-12-24 Bannister Bryant Method and apparatus for the manufacture of seamless tubes
US2155883A (en) * 1937-02-11 1939-04-25 Nat Tube Co Apparatus for expanding metallic tubular workpieces
US2176412A (en) * 1936-08-19 1939-10-17 Timken Roller Bearing Co Method and apparatus for sizing tubes
FR2212186A1 (en) * 1972-11-17 1974-07-26 Pervouralsky Novotrubny Z

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE128263C (en) *
FR411655A (en) * 1910-01-18 1910-06-22 Verwertung Von Rohrwalz Patent Method and device for the manufacture of seamless tubes, drawn from hollow blocks
FR555725A (en) * 1922-09-06 1923-07-05 Apparatus for expanding metal tubes
FR636849A (en) * 1927-06-30 1928-04-17 Mannesmannrohren Verke Oblique rolling device for flaring metal pipes
FR703320A (en) * 1929-10-05 1931-04-28 Mannes Mannrohren Werke Seamless pipe manufacturing process
US2025146A (en) * 1933-03-14 1935-12-24 Bannister Bryant Method and apparatus for the manufacture of seamless tubes
US2176412A (en) * 1936-08-19 1939-10-17 Timken Roller Bearing Co Method and apparatus for sizing tubes
US2155883A (en) * 1937-02-11 1939-04-25 Nat Tube Co Apparatus for expanding metallic tubular workpieces
FR2212186A1 (en) * 1972-11-17 1974-07-26 Pervouralsky Novotrubny Z

Also Published As

Publication number Publication date
BR8002791A (en) 1980-12-16
IT1153809B (en) 1987-01-21
DE3015265A1 (en) 1980-11-27
JPS55149709A (en) 1980-11-21
IT8009422A1 (en) 1981-11-06
IT8009422A0 (en) 1980-05-06

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