GB1386034A - Rolling of tubular blooms to produce tubes - Google Patents

Rolling of tubular blooms to produce tubes

Info

Publication number
GB1386034A
GB1386034A GB1319473A GB1319473A GB1386034A GB 1386034 A GB1386034 A GB 1386034A GB 1319473 A GB1319473 A GB 1319473A GB 1319473 A GB1319473 A GB 1319473A GB 1386034 A GB1386034 A GB 1386034A
Authority
GB
United Kingdom
Prior art keywords
mandrel
rolling
bloom
stands
sets
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
GB1319473A
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.)
Mannesmann Meer AG
Original Assignee
Mannesmann Meer AG
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 Mannesmann Meer AG filed Critical Mannesmann Meer AG
Publication of GB1386034A publication Critical patent/GB1386034A/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
    • 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
    • B21B17/08—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 having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills
    • B21B17/10—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 having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills in a continuous process

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

1386034 Rolling tubes MANNESMANNMEER AG 20 March 1973 [1 Dec 1972] 13194/73 Heading B3M A tubular bloom supported on a stepped mandrel 3 is rolled by a number of sets of grooved rolls arranged in tandem, each set having the same pass diameter and each cooperating with a respective mandrel portion 34-37 of successively greater diameter. The portions are formed on a mandrel 3, which is locked in place at 9, and determine the increase in internal diameter of the bloom during rolling. The mandrel, Fig. 4, extends through the sets of rolls in stands 40, 50, 60 and 70, a sizing mill 30 following the stands. The circulation path of used mandrels is indicated at 12. The successive reductions in the bloom in four successive passes may be, for example, 25%, 18%, 13%, and 7À5%, or the reduction in the first pass may be less than that in the second.
GB1319473A 1972-12-01 1973-03-20 Rolling of tubular blooms to produce tubes Expired GB1386034A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2259657A DE2259657A1 (en) 1972-12-01 1972-12-01 PROCESS AND EQUIPMENT FOR ROLLING OUT AND SMOOTHING PIPES IN A PLUG MILL
US00394910A US3823594A (en) 1972-12-01 1973-09-06 Rolling of tubular blooms to produce tubes

Publications (1)

Publication Number Publication Date
GB1386034A true GB1386034A (en) 1975-03-05

Family

ID=25764191

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1319473A Expired GB1386034A (en) 1972-12-01 1973-03-20 Rolling of tubular blooms to produce tubes

Country Status (6)

Country Link
US (1) US3823594A (en)
JP (1) JPS4988763A (en)
CA (1) CA970601A (en)
DE (1) DE2259657A1 (en)
FR (1) FR2208725B1 (en)
GB (1) GB1386034A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US311477A (en) * 1885-02-03 And james a
US424213A (en) * 1890-03-25 Mandrel for rolling seamless tubes
GB351275A (en) * 1929-09-13 1931-06-25 Mannesmann Ag Improved method of rolling tubes on plug rolling mills

Also Published As

Publication number Publication date
DE2259657A1 (en) 1974-06-06
FR2208725B1 (en) 1976-11-19
JPS4988763A (en) 1974-08-24
FR2208725A1 (en) 1974-06-28
US3823594A (en) 1974-07-16
CA970601A (en) 1975-07-08

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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