JPS555164A - Method for producing rough shape bloom for large size h-beam from flat bloom - Google Patents

Method for producing rough shape bloom for large size h-beam from flat bloom

Info

Publication number
JPS555164A
JPS555164A JP7779178A JP7779178A JPS555164A JP S555164 A JPS555164 A JP S555164A JP 7779178 A JP7779178 A JP 7779178A JP 7779178 A JP7779178 A JP 7779178A JP S555164 A JPS555164 A JP S555164A
Authority
JP
Japan
Prior art keywords
drafts
blooms
web
pass
flange
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.)
Granted
Application number
JP7779178A
Other languages
Japanese (ja)
Other versions
JPS5910842B2 (en
Inventor
Katsuichi Nakayama
Osamu Koshida
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP7779178A priority Critical patent/JPS5910842B2/en
Publication of JPS555164A publication Critical patent/JPS555164A/en
Publication of JPS5910842B2 publication Critical patent/JPS5910842B2/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
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/088—H- or I-sections

Landscapes

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

Abstract

PURPOSE:To produce rough-shape blooms for large-size H-beams of good quality from flat blooms by universal-rolling the blooms at the rolling reductions corresponding to the estimated tongue lengths of the blooms at the respective passes. CONSTITUTION:Web drafts of respective passes are assumed according to blank thicknesses, finish web thicknesses and pass times. Next, flange drafts are obtained by using the web drafts thus determined. Next, the tongue lengths of the bottom and top sides are obtained by using the flange drafts and web drafts thus obtained. Next, the flange width expanding rate of the (i)th pass is obtained, from which the entire sectional shape of the (i)th pass is obtainable and a rough pass schedule is determined. The finish flange width size calculated in this way is compared with the target size and the computations are repeated by increasing or decreasing the blank billet width until it coincides with the target value and finally the entire pass schedule is determined.
JP7779178A 1978-06-27 1978-06-27 Method for producing rough shaped steel billet for large H-beam steel from flat steel billet Expired JPS5910842B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7779178A JPS5910842B2 (en) 1978-06-27 1978-06-27 Method for producing rough shaped steel billet for large H-beam steel from flat steel billet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7779178A JPS5910842B2 (en) 1978-06-27 1978-06-27 Method for producing rough shaped steel billet for large H-beam steel from flat steel billet

Publications (2)

Publication Number Publication Date
JPS555164A true JPS555164A (en) 1980-01-16
JPS5910842B2 JPS5910842B2 (en) 1984-03-12

Family

ID=13643798

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7779178A Expired JPS5910842B2 (en) 1978-06-27 1978-06-27 Method for producing rough shaped steel billet for large H-beam steel from flat steel billet

Country Status (1)

Country Link
JP (1) JPS5910842B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3222930A1 (en) * 1981-07-10 1983-02-03 Sumitomo Metal Industries, Ltd., Osaka METHOD FOR PRODUCING A BRACKET BLOCK FOR UNIVERSAL CARRIERS
JPS63153701A (en) * 1986-08-21 1988-06-27 Akai Electric Co Ltd Portable electrocardiograph usable for long time

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3222930A1 (en) * 1981-07-10 1983-02-03 Sumitomo Metal Industries, Ltd., Osaka METHOD FOR PRODUCING A BRACKET BLOCK FOR UNIVERSAL CARRIERS
DE3222930C2 (en) * 1981-07-10 1987-08-20 Sumitomo Metal Industries, Ltd., Osaka, Jp
JPS63153701A (en) * 1986-08-21 1988-06-27 Akai Electric Co Ltd Portable electrocardiograph usable for long time

Also Published As

Publication number Publication date
JPS5910842B2 (en) 1984-03-12

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