GB1389035A - Method of and apparatus for manufacturing copper tubes by means of hydrostatic extrusion - Google Patents

Method of and apparatus for manufacturing copper tubes by means of hydrostatic extrusion

Info

Publication number
GB1389035A
GB1389035A GB3486372A GB3486372A GB1389035A GB 1389035 A GB1389035 A GB 1389035A GB 3486372 A GB3486372 A GB 3486372A GB 3486372 A GB3486372 A GB 3486372A GB 1389035 A GB1389035 A GB 1389035A
Authority
GB
United Kingdom
Prior art keywords
tube
die
copper
billet
water
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
GB3486372A
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Allmanna Svenska Elektriska AB
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 ASEA AB, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Publication of GB1389035A publication Critical patent/GB1389035A/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
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/007—Hydrostatic extrusion
    • 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
    • B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work

Landscapes

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

Abstract

1389035 Extruding ALLMANNA SVENSKA ELEKTRISKA AB 26 July 1972 [27 July 1971] 34863/72 Heading B3P A tubular copper billet is formed into a tube by heating the billet and hydrostatically extruding it through a die from which it is led to a cooling zone spaced from the die sufficiently to allow recrystallization of the copper before cooling. The copper tube is guided from the die by a tube 2 which is supplied with inert gas, e.g. nitrogen from a cylinder 4 near the die. The guide tube 2 has one or more cooling units 10 near its outlet which spray the tube with water. The water is collected in a drainage device 14 around the guide tube 2 which is perforated in this area. A plug may be provided in the end of the copper tube to prevent ingress of air or water. The billet is initially heated to above 250‹ C., and the extrusion ratio is greater than 200 : 1. In one example the initial temperature is about 350‹ C., the ratio about 500 : 1. The extrusion pressure 10-15 kbar and the cooling units are 30 metres from the die which at an extrusion speed of 15 m./sec. allows 2 seconds for the recrystallization. The cooled extruded tube is directed to a coiler 3.
GB3486372A 1971-07-27 1972-07-26 Method of and apparatus for manufacturing copper tubes by means of hydrostatic extrusion Expired GB1389035A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE960571A SE365957B (en) 1971-07-27 1971-07-27

Publications (1)

Publication Number Publication Date
GB1389035A true GB1389035A (en) 1975-04-03

Family

ID=20277079

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3486372A Expired GB1389035A (en) 1971-07-27 1972-07-26 Method of and apparatus for manufacturing copper tubes by means of hydrostatic extrusion

Country Status (8)

Country Link
BR (1) BR7204995D0 (en)
CH (1) CH537221A (en)
DE (1) DE2235143A1 (en)
FR (1) FR2147194A1 (en)
GB (1) GB1389035A (en)
IT (1) IT964788B (en)
NL (1) NL7210195A (en)
SE (1) SE365957B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242895A (en) * 1978-09-15 1981-01-06 Wean United, Inc. Method and apparatus for cooling and handling extruded workpieces

Also Published As

Publication number Publication date
NL7210195A (en) 1973-01-30
DE2235143A1 (en) 1973-03-15
SE365957B (en) 1974-04-08
IT964788B (en) 1974-01-31
FR2147194A1 (en) 1973-03-09
BR7204995D0 (en) 1974-10-22
CH537221A (en) 1973-05-31

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Legal Events

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