FR2242166A1 - Method of forming tapering boat masts - involves reworking drawn tubes which have varying thicknesses - Google Patents

Method of forming tapering boat masts - involves reworking drawn tubes which have varying thicknesses

Info

Publication number
FR2242166A1
FR2242166A1 FR7332042A FR7332042A FR2242166A1 FR 2242166 A1 FR2242166 A1 FR 2242166A1 FR 7332042 A FR7332042 A FR 7332042A FR 7332042 A FR7332042 A FR 7332042A FR 2242166 A1 FR2242166 A1 FR 2242166A1
Authority
FR
France
Prior art keywords
boat masts
varying thicknesses
tubes
thickness
drawn tubes
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
FR7332042A
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.)
DIFFUSION Z
Original Assignee
DIFFUSION Z
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 DIFFUSION Z filed Critical DIFFUSION Z
Priority to FR7332042A priority Critical patent/FR2242166A1/en
Publication of FR2242166A1 publication Critical patent/FR2242166A1/en
Pending 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)

Abstract

Fabrication of conical form tubes of constant wall thickness for boat masts, embodies the shaping of a drawn tube of varying thickness by hammering onto a matrix. Typically a drawn tube 1 metre long and with wall thickness varying longitudinally from 1 mm to 2 mm would be shaped by subjecting the thinner wall end to a hammering action until the tube thickness is constant at 2 mm. Pref. boat masts formed by such a method are in one piece without welding or connections and the process applies to all standard metals. The tubes have a flexibility which varies from one end to the other.
FR7332042A 1973-09-05 1973-09-05 Method of forming tapering boat masts - involves reworking drawn tubes which have varying thicknesses Pending FR2242166A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7332042A FR2242166A1 (en) 1973-09-05 1973-09-05 Method of forming tapering boat masts - involves reworking drawn tubes which have varying thicknesses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7332042A FR2242166A1 (en) 1973-09-05 1973-09-05 Method of forming tapering boat masts - involves reworking drawn tubes which have varying thicknesses

Publications (1)

Publication Number Publication Date
FR2242166A1 true FR2242166A1 (en) 1975-03-28

Family

ID=9124663

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7332042A Pending FR2242166A1 (en) 1973-09-05 1973-09-05 Method of forming tapering boat masts - involves reworking drawn tubes which have varying thicknesses

Country Status (1)

Country Link
FR (1) FR2242166A1 (en)

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