JPS5772701A - Rolling method for giving high rolling reduction to material to be rolled - Google Patents

Rolling method for giving high rolling reduction to material to be rolled

Info

Publication number
JPS5772701A
JPS5772701A JP14861980A JP14861980A JPS5772701A JP S5772701 A JPS5772701 A JP S5772701A JP 14861980 A JP14861980 A JP 14861980A JP 14861980 A JP14861980 A JP 14861980A JP S5772701 A JPS5772701 A JP S5772701A
Authority
JP
Japan
Prior art keywords
rolling
blank material
bite
rolling process
rolled
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
JP14861980A
Other languages
Japanese (ja)
Inventor
Makoto Shimizu
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14861980A priority Critical patent/JPS5772701A/en
Publication of JPS5772701A publication Critical patent/JPS5772701A/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
    • B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing

Landscapes

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

Abstract

PURPOSE:To improve the feedability of a blank material to be fed to a rolling roll, and to make the rolling process possible to be performed with a reduced number of rolling passes, by previously forming the longitudinal end of the blank material into a truncated pyramid shape, and then, by starting a rolling process for giving a high rolling reduction to the blank material. CONSTITUTION:The longitudinal end of a blank material 1 such as a billet, a bar or a rod, is formed into a truncated pyramid shape, in order to reduce the angle of bite of a rolling roll 2 at the bite-starting point; then, a roughing mill is started to perform a rolling process for giving a high rolling reduction to the blank material 1. Hereby, the angle of bite for the tip of the blank material 1 is reduced from theta to theta' so that the feedability of the blank material 1 is improved, and the length of the rolling process is shortened. Besides, the amount of defective part due to the front cracking in the rolled material is reduced so that the yield is improved.
JP14861980A 1980-10-22 1980-10-22 Rolling method for giving high rolling reduction to material to be rolled Pending JPS5772701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14861980A JPS5772701A (en) 1980-10-22 1980-10-22 Rolling method for giving high rolling reduction to material to be rolled

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14861980A JPS5772701A (en) 1980-10-22 1980-10-22 Rolling method for giving high rolling reduction to material to be rolled

Publications (1)

Publication Number Publication Date
JPS5772701A true JPS5772701A (en) 1982-05-07

Family

ID=15456827

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14861980A Pending JPS5772701A (en) 1980-10-22 1980-10-22 Rolling method for giving high rolling reduction to material to be rolled

Country Status (1)

Country Link
JP (1) JPS5772701A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030053814A (en) * 2001-12-24 2003-07-02 주식회사 포스코 Billet for rod rolling
KR100814112B1 (en) * 2001-12-10 2008-03-14 주식회사 포스코 Finishing device for billet front end

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100814112B1 (en) * 2001-12-10 2008-03-14 주식회사 포스코 Finishing device for billet front end
KR20030053814A (en) * 2001-12-24 2003-07-02 주식회사 포스코 Billet for rod rolling

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