FR2265472A1 - Conical tube rolling mill - with four-roll stands in rough and two finish conicity sections - Google Patents

Conical tube rolling mill - with four-roll stands in rough and two finish conicity sections

Info

Publication number
FR2265472A1
FR2265472A1 FR7428402A FR7428402A FR2265472A1 FR 2265472 A1 FR2265472 A1 FR 2265472A1 FR 7428402 A FR7428402 A FR 7428402A FR 7428402 A FR7428402 A FR 7428402A FR 2265472 A1 FR2265472 A1 FR 2265472A1
Authority
FR
France
Prior art keywords
conicity
rough
rolling mill
section
finish
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.)
Withdrawn
Application number
FR7428402A
Other languages
French (fr)
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.)
SANYU KOSAN KK
Original Assignee
SANYU KOSAN KK
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 SANYU KOSAN KK filed Critical SANYU KOSAN KK
Publication of FR2265472A1 publication Critical patent/FR2265472A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes
    • B21C37/185—Making tubes with varying diameter in longitudinal direction conical tubes starting from sheet material

Abstract

A rolling mill to produce continuously long conical metal tubes for use as lamp posts along motor roads consists of preparatory section where a rough conicity is given to a metal strip, and a finishing section with two elements where the final conical form is produced. The elements can be traversed on a track at right angles to the direction of feed for alternate alignment with the section the finished tube can be ejected by reversing the direction of rotation of the four dumbbell-shaped rolls of which each stand consists. This is a time-saving method of producing conical tube continuously. The longitudinal gap is easy to align for the subsequent seam welding operation.
FR7428402A 1974-03-25 1974-08-19 Conical tube rolling mill - with four-roll stands in rough and two finish conicity sections Withdrawn FR2265472A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3251974A JPS521912B2 (en) 1974-03-25 1974-03-25

Publications (1)

Publication Number Publication Date
FR2265472A1 true FR2265472A1 (en) 1975-10-24

Family

ID=12361200

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7428402A Withdrawn FR2265472A1 (en) 1974-03-25 1974-08-19 Conical tube rolling mill - with four-roll stands in rough and two finish conicity sections

Country Status (4)

Country Link
JP (1) JPS521912B2 (en)
DE (1) DE2436069A1 (en)
FR (1) FR2265472A1 (en)
IT (1) IT1016957B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60108530A (en) * 1983-11-17 1985-06-14 Iwao Maeyama 2-cycle engine
JPS63309717A (en) * 1987-06-12 1988-12-16 Kawasaki Heavy Ind Ltd Structure of air inlet portion for two-cycle engine
US5461896A (en) * 1994-02-18 1995-10-31 Abbey Etna Machine Company Automated changeover tube mill

Also Published As

Publication number Publication date
IT1016957B (en) 1977-06-20
DE2436069A1 (en) 1975-10-02
JPS50125960A (en) 1975-10-03
JPS521912B2 (en) 1977-01-18

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Legal Events

Date Code Title Description
AR Application made for restoration
BD Lapse confirmed
ST Notification of lapse