JPS5832501A - Method and device for determining stopping position of slab in vertical rolling mill - Google Patents

Method and device for determining stopping position of slab in vertical rolling mill

Info

Publication number
JPS5832501A
JPS5832501A JP12920281A JP12920281A JPS5832501A JP S5832501 A JPS5832501 A JP S5832501A JP 12920281 A JP12920281 A JP 12920281A JP 12920281 A JP12920281 A JP 12920281A JP S5832501 A JPS5832501 A JP S5832501A
Authority
JP
Japan
Prior art keywords
slab
parts
broadside
slabs
rolling
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
JP12920281A
Other languages
Japanese (ja)
Inventor
Ryoji Terakado
Akiichi Nakajima
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP12920281A priority Critical patent/JPS5832501A/en
Publication of JPS5832501A publication Critical patent/JPS5832501A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/02Metal-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 billets, in which the cross-sectional form is unimportant Rolling combined with forging or pressing
    • B21B1/026Rolling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B2263/00Shape of product
    • B21B2263/20End shape; fish tail; tongue

Abstract

PURPOSE:To prevent the generation of fish tails and broadside tinning-down in the end parts of slabs in the stage of middle rolling of continuously cast slabs with hot strip mills having a vertical scale breaker by subjecting the end parts of the slabs to broadside screwing down with the vertical rolls which are held stopped. CONSTITUTION:In the stage of producing hot strips of various widths from a continuously cast slab of a specified width, the slab is subjected to descaling and rolling for the purpose of width adjustment with vertical rolls of vertical rolling mills. Here, fishtails of a recessing shape and the parts of a narrow width are usually produced in the preceding and succeeding ends of the slab, and are required to be cut away before the slab is fed to finishing mills, due to which the yield of the material is decreased considerably. To prevent such decrease, in the stage of broadside rolling of the slab with the vertical rolls, broadside screwing-down is applied to the end parts of the slab with the vertical rolls which are held stopped, whereby the preceding and succeeding ends of the slabs are formed to the sections of a dogbone shape similar to the shape in the central part. There is no need for cutting the preceding and succeeding end parts of the slab, and the slab is rolled to a hot strip in higher yields.
JP12920281A 1981-08-18 1981-08-18 Method and device for determining stopping position of slab in vertical rolling mill Pending JPS5832501A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12920281A JPS5832501A (en) 1981-08-18 1981-08-18 Method and device for determining stopping position of slab in vertical rolling mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12920281A JPS5832501A (en) 1981-08-18 1981-08-18 Method and device for determining stopping position of slab in vertical rolling mill

Publications (1)

Publication Number Publication Date
JPS5832501A true JPS5832501A (en) 1983-02-25

Family

ID=15003658

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12920281A Pending JPS5832501A (en) 1981-08-18 1981-08-18 Method and device for determining stopping position of slab in vertical rolling mill

Country Status (1)

Country Link
JP (1) JPS5832501A (en)

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