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GB1226504A - - Google Patents

Info

Publication number
GB1226504A
GB1226504A GB1226504DA GB1226504A GB 1226504 A GB1226504 A GB 1226504A GB 1226504D A GB1226504D A GB 1226504DA GB 1226504 A GB1226504 A GB 1226504A
Authority
GB
United Kingdom
Prior art keywords
billet
stands
stand
speed
mandrel
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.)
Expired
Application number
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
Priority claimed from DE19681652564 external-priority patent/DE1652564C/en
Application filed filed Critical
Publication of GB1226504A publication Critical patent/GB1226504A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/78—Control of tube rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
    • B21B17/04—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length in a continuous process

Landscapes

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

Abstract

1,226,504. Rolling tubes. MANNESMANNROHREN-WERKE G.m.b.H. 29 Jan., 1969 [1 Feb., 1968], No. 4963/69. Heading B3M. In a process for rolling a tube from a pierced billet in a continuous mill, the speeds of the individual stands of the mill are modified as the leading end of the billet enters the stands and/or as the trailing end leaves the stands. As the leading end enters stand b 2 or a following stand, the speed of the other stand or stands in which the billet is present is reduced by a fraction of the speed by which a mandrel 2 in the billet increases. Alternatively, or additionally, the speeds of the stand or stands in which the billet is still present is reduced as the billet leaves the preceding stands. The difference in speed of any stand is calculated by multiplying the change in speed of the mandrel by a function of the coefficients of friction between the mandrel and billet, and between the billet and rolls.
GB1226504D 1968-02-01 1969-01-29 Expired GB1226504A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681652564 DE1652564C (en) 1968-02-01 1968-02-01 Process for rolling a sleeve into a tube billet over a mandrel bar in a rolling mill

Publications (1)

Publication Number Publication Date
GB1226504A true GB1226504A (en) 1971-03-31

Family

ID=5685010

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1226504D Expired GB1226504A (en) 1968-02-01 1969-01-29

Country Status (2)

Country Link
US (1) US3552170A (en)
GB (1) GB1226504A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4394822A (en) 1980-06-06 1983-07-26 Morgan Construction Company High reduction method and apparatus for continuously hot rolling products

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4817145B1 (en) * 1970-03-07 1973-05-26
DE2347891C2 (en) * 1973-09-24 1983-04-21 Kocks Technik Gmbh & Co, 4010 Hilden Rolling mill for reducing the stretching of tubes
DE2750637A1 (en) * 1977-11-09 1979-05-10 Mannesmann Ag Seamless tube prodn. - using long mandrel advancing together with tube at thirty per-cent of tube advancing speed
US4289011A (en) * 1978-11-17 1981-09-15 Nippon Steel Corporation Continuous pipe rolling process
US4318294A (en) * 1978-12-29 1982-03-09 Nippon Steel Corporation Method of manufacturing seamless metal pipes and tubes
JPS57139408A (en) * 1981-02-20 1982-08-28 Mannesmann Ag Manufacture of seamless pipe
CA2763292C (en) * 2009-06-19 2017-05-16 Sms Innse Spa Tube rolling plant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4394822A (en) 1980-06-06 1983-07-26 Morgan Construction Company High reduction method and apparatus for continuously hot rolling products

Also Published As

Publication number Publication date
US3552170A (en) 1971-01-05

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee