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GB1343601A - Tubular metal elements - Google Patents

Tubular metal elements

Info

Publication number
GB1343601A
GB1343601A GB5382570A GB1343601DA GB1343601A GB 1343601 A GB1343601 A GB 1343601A GB 5382570 A GB5382570 A GB 5382570A GB 1343601D A GB1343601D A GB 1343601DA GB 1343601 A GB1343601 A GB 1343601A
Authority
GB
United Kingdom
Prior art keywords
tube
tapering
constant
tubes
initial
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.)
Expired
Application number
GB5382570A
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.)
Frater E C
Original Assignee
Frater E C
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 Frater E C filed Critical Frater E C
Publication of GB1343601A publication Critical patent/GB1343601A/en
Expired 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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Extrusion Of Metal (AREA)

Abstract

1343601 Making lamp-posts, masts etc.; stamping; extruding E C FRATER 8 Nov 1971 [12 Nov 1970] 53825/70 Headings B3A and B3Q Externally tapered metal tubes are made by fluid-inflating tubes of variable wall thickness so as to reduce the variation. Lamp-posts, ship's masts or booms may be formed in steel or aluminium alloy. The initial tube may be of constant or tapering external or internal crosssection, e.g. the external cross-section may be circular, oval, D-shape or of streamline form. In the example, the initial tube is formed by extruding a hollow billet on a tapering mandrel through a die (8), Fig. 1 (not shown), to form a tube having a constant outside diameter and a tapering bore. The mandrel (12) may be free, fixed to an extrusion ram (4) or moved at a different rate from that of the ram. Fluidinflation follows with axial pressure applied by members 16, 18 to form a tapered tube of constant wall-thickness. The necked end (22), Fig. 3 (not shown), may be removed. Aluminium alloy initial tubes may be annealed before inflation.
GB5382570A 1970-11-12 1970-11-12 Tubular metal elements Expired GB1343601A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5382570 1970-11-12

Publications (1)

Publication Number Publication Date
GB1343601A true GB1343601A (en) 1974-01-16

Family

ID=10469108

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5382570A Expired GB1343601A (en) 1970-11-12 1970-11-12 Tubular metal elements

Country Status (1)

Country Link
GB (1) GB1343601A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1007128A3 (en) * 1992-11-03 1995-04-04 Picanol Nv Method for manufacturing a pipe with a random flow section
US6116074A (en) * 1997-04-23 2000-09-12 Daimler-Benz Aktiengesellschaft Extrusion arrangement and process for manufacturing hollow-profile workpieces made of metal
CN106311785A (en) * 2016-10-20 2017-01-11 瑞安市金裕铝业有限公司 Aluminum alloy aluminum bar and method for manufacturing aluminum lamp through aluminum alloy aluminum bar

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1007128A3 (en) * 1992-11-03 1995-04-04 Picanol Nv Method for manufacturing a pipe with a random flow section
US6116074A (en) * 1997-04-23 2000-09-12 Daimler-Benz Aktiengesellschaft Extrusion arrangement and process for manufacturing hollow-profile workpieces made of metal
CN106311785A (en) * 2016-10-20 2017-01-11 瑞安市金裕铝业有限公司 Aluminum alloy aluminum bar and method for manufacturing aluminum lamp through aluminum alloy aluminum bar

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees