JPS6462240A - Production of rough billet by forging - Google Patents

Production of rough billet by forging

Info

Publication number
JPS6462240A
JPS6462240A JP21798887A JP21798887A JPS6462240A JP S6462240 A JPS6462240 A JP S6462240A JP 21798887 A JP21798887 A JP 21798887A JP 21798887 A JP21798887 A JP 21798887A JP S6462240 A JPS6462240 A JP S6462240A
Authority
JP
Japan
Prior art keywords
forging
steel
steel stock
manufacturing
tool
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
JP21798887A
Other languages
Japanese (ja)
Inventor
Kazuo Watanabe
Hiromi Seki
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
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 JP21798887A priority Critical patent/JPS6462240A/en
Publication of JPS6462240A publication Critical patent/JPS6462240A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/04—Shaping in the rough solely by forging or pressing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

PURPOSE:To manufacture a rough billet with good material yield and high efficiency by applying forging on the whole length in the longitudinal direction after forming two recessed parts in the longitudinal direction of a steel stock by the tool of circular arcuated section in advance, in case of manufacturing the rough billet for rolling a bar steel by forging from the steel stock. CONSTITUTION:In case of manufacturing an H-shape steel stock, the thick billet made in almost H-shape in advance is subjected to hot rolling after manufacturing it by forging to manufacture the bar steel of an H-shape steel, etc. In case of manufacturing the rough billet of as that in this H-shape by forging of a steel stock, a so-called crop 6 is formed at the initial forging time and this crop part becomes of the yield reduction of the raw material. In order to prevent this, a rolling reduction is executed in the longitudinal direction of a steel stock 4 by the tool 3 having a circular arcuate section so as to form the recessed part 5 at two places at both sides for the sectional center of the raw material steel stock 4. The rough billet having no generation of the crop 6 is obtd. with good material yield by forging by using the tool having such a non-steady part that the rolling reduction is gradually reduced in the compression and width directions compared with an ordinary tool steady part thereafter.
JP21798887A 1987-09-02 1987-09-02 Production of rough billet by forging Pending JPS6462240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21798887A JPS6462240A (en) 1987-09-02 1987-09-02 Production of rough billet by forging

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21798887A JPS6462240A (en) 1987-09-02 1987-09-02 Production of rough billet by forging

Publications (1)

Publication Number Publication Date
JPS6462240A true JPS6462240A (en) 1989-03-08

Family

ID=16712860

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21798887A Pending JPS6462240A (en) 1987-09-02 1987-09-02 Production of rough billet by forging

Country Status (1)

Country Link
JP (1) JPS6462240A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5245601A (en) * 1988-11-30 1993-09-14 Deutsche Thomson-Brandt Gmbh Optical recorder and/or player including cleaning means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5245601A (en) * 1988-11-30 1993-09-14 Deutsche Thomson-Brandt Gmbh Optical recorder and/or player including cleaning means

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