JPS5689301A - Manufacture of tapered bar - Google Patents

Manufacture of tapered bar

Info

Publication number
JPS5689301A
JPS5689301A JP16728179A JP16728179A JPS5689301A JP S5689301 A JPS5689301 A JP S5689301A JP 16728179 A JP16728179 A JP 16728179A JP 16728179 A JP16728179 A JP 16728179A JP S5689301 A JPS5689301 A JP S5689301A
Authority
JP
Japan
Prior art keywords
roll
blank material
rolls
rolling
tapered
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
JP16728179A
Other languages
Japanese (ja)
Inventor
Mitsushige Kawakubo
Toyoyuki Tono
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.)
NHK Spring Co Ltd
Original Assignee
NHK Spring Co 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 NHK Spring Co Ltd filed Critical NHK Spring Co Ltd
Priority to JP16728179A priority Critical patent/JPS5689301A/en
Publication of JPS5689301A publication Critical patent/JPS5689301A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/007—Taper rolling, e.g. leaf springs
    • 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
    • B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/22—Hinged chocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/22—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal
    • B21B31/28—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal by toggle-lever mechanisms

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Metal Rolling (AREA)

Abstract

PURPOSE:To roll the blank material into tapered bars different in length and grade of the taper, by variably controlling the roll gap of each of the rolling roll, the twist preventing roller, the edging roll, and the shape reforming roll. CONSTITUTION:In the rolling work for rolling the blank material a0 into a tapered bar by the group of rolling rolls shaped into true roundness, whose roll gaps are variably controlled in connection with the longitudinal extent of movement of the blank material a0, first of all, the blank material a0 is preliminarily rolled into a tapered shape a1 by variably controlling the roll gap of the rolling rolls 6, 7, respectively provided with a projection 8 and its counter groove 9. Next, this blank material a1 is further rolled into a tapered shape a2 by controlling the roll gap of the flat rolls 12, 12. Next, the blank material a2 is subjected to the edging work of the edging rolls 13, 13; hereupon, two couples of roll-gap-adjustable upper and lower twist preventing rollers 14 press the blank material a2 in its thickness direction in order to prevent the blank material a2 from being twisted by the edging work of the rolls 13, 13. Thus obtained material a3 is pressed by the flat rolls 27, 27, in the thickness direction in order to straighten the ruggedness of the tapered part; hereby, the product b0 is obtained.
JP16728179A 1979-12-22 1979-12-22 Manufacture of tapered bar Pending JPS5689301A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16728179A JPS5689301A (en) 1979-12-22 1979-12-22 Manufacture of tapered bar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16728179A JPS5689301A (en) 1979-12-22 1979-12-22 Manufacture of tapered bar

Publications (1)

Publication Number Publication Date
JPS5689301A true JPS5689301A (en) 1981-07-20

Family

ID=15846831

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16728179A Pending JPS5689301A (en) 1979-12-22 1979-12-22 Manufacture of tapered bar

Country Status (1)

Country Link
JP (1) JPS5689301A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54155973A (en) * 1978-05-30 1979-12-08 Nhk Spring Co Ltd Width collecting machine in leaf spring taper rolling

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54155973A (en) * 1978-05-30 1979-12-08 Nhk Spring Co Ltd Width collecting machine in leaf spring taper rolling

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