JPS5611101A - Manufacture of rough shaped steel billet for shape steel - Google Patents

Manufacture of rough shaped steel billet for shape steel

Info

Publication number
JPS5611101A
JPS5611101A JP8757779A JP8757779A JPS5611101A JP S5611101 A JPS5611101 A JP S5611101A JP 8757779 A JP8757779 A JP 8757779A JP 8757779 A JP8757779 A JP 8757779A JP S5611101 A JPS5611101 A JP S5611101A
Authority
JP
Japan
Prior art keywords
flange
thickness
crop
web
breadth
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
JP8757779A
Other languages
Japanese (ja)
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 JP8757779A priority Critical patent/JPS5611101A/en
Publication of JPS5611101A publication Critical patent/JPS5611101A/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
    • 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 stabilize the rolling work, and to reduce the amount of the crop cut, by specifically changing the draft percentages for the web and the flange in every rolling pass when the ratio between the flange thickness and the sheet breadth exceeds the specified value, in case of manufacturing the titled steel billet from the flat steel material by the universal mill. CONSTITUTION:When the rough shaped steel billet 2 for the shape steel, for example the H-beam of the flange breadth BF larger than the thickness HO, is to be manufactured from the flat steel material 1 of thickness HO, the flange thickness tFO becomes larger than the material thickness, HO. Therefore, the generation of the square crop 5 is inevitable. Hereupon, the flange thickness and breadth during the forming process are respectively taken as tf and H, and the draft percentage for the flange is made smaller than that for the web until the ratio between the flange thickness and the sheet breadth tf/H becomes 1.0, and this draft percentage difference is made larger as the stage of the pass is earlier. When said ratio tf/H becomes 1.0, the web crop is advanced so as to be a convex style as shown by the figure D(a) for minimizing the amount of the square flange crop. In the following latter half passes, above stated relation between two draft percentages is reversed; however, the web crop is formerly shaped convex as shown by the figure D(b), the generation of defective biting is avoided.
JP8757779A 1979-07-11 1979-07-11 Manufacture of rough shaped steel billet for shape steel Pending JPS5611101A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8757779A JPS5611101A (en) 1979-07-11 1979-07-11 Manufacture of rough shaped steel billet for shape steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8757779A JPS5611101A (en) 1979-07-11 1979-07-11 Manufacture of rough shaped steel billet for shape steel

Publications (1)

Publication Number Publication Date
JPS5611101A true JPS5611101A (en) 1981-02-04

Family

ID=13918849

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8757779A Pending JPS5611101A (en) 1979-07-11 1979-07-11 Manufacture of rough shaped steel billet for shape steel

Country Status (1)

Country Link
JP (1) JPS5611101A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56149353U (en) * 1980-04-07 1981-11-10
JPS59178102A (en) * 1983-03-21 1984-10-09 サシロ・ソシエテ・アノニム Integral type universal rolling method of h type or i type metallic shape material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56149353U (en) * 1980-04-07 1981-11-10
JPS59178102A (en) * 1983-03-21 1984-10-09 サシロ・ソシエテ・アノニム Integral type universal rolling method of h type or i type metallic shape material

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