US3777362A - Method of manufacturing rods or wire of compound material - Google Patents

Method of manufacturing rods or wire of compound material Download PDF

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Publication number
US3777362A
US3777362A US00226759A US3777362DA US3777362A US 3777362 A US3777362 A US 3777362A US 00226759 A US00226759 A US 00226759A US 3777362D A US3777362D A US 3777362DA US 3777362 A US3777362 A US 3777362A
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US
United States
Prior art keywords
core
casing
billet
air
space
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 - Lifetime
Application number
US00226759A
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English (en)
Inventor
J Nilsson
B Brinkeborn
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
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 filed Critical ASEA AB
Application granted granted Critical
Publication of US3777362A publication Critical patent/US3777362A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21C23/22—Making metal-coated products; Making products from two or more metals

Definitions

  • I ABSTRACT In manufacturing a rod or wire of compound material from a core of aluminum or aluminum alloy and a casing of copper or copper alloy by hydrostatic extrusion, a billet is used in which the core has a smaller external diameter than the internal diameter of the casing, so as to provide clearance therebetween sufficient that at least most damage to the casing during soft-annealing and handling will not be of sufficient extent to prevent the insertion of the core into a casing.
  • An internal space is provided at the rear of the billet to collect the air present in the gap between the core and the casing as it is displaced when the core and easing are pressed into contact with each other.
  • the present invention relates to a method of manufacturing rods or wire of compound material having a core of aluminum or an aluminum alloy and a casing of copper or a copper alloy surrounding the core, by means of hydrostatic extrusion.
  • a compound billet is used consisting of a core of aluminum and asurrounding casing of a copper tube which are inserted in a pressure chamber containing a pressure medium.
  • the billet is forced out through an opening in a die and thus shaped to a product with the desired cross-section.
  • the core and casing at the rear end of the billet are tightly sealed, for example with a sealing ring or a lid of elastomeric material which prevents pressure medium from penetrating between the core and the surrounding tube.
  • annular air-collecting space is arranged between the core and the casing at the rear part of the billet.
  • the annular space can be effected by bevelling the plate or a space can be arranged in the pressure plate and it may be shaped with grooves or channels through which air. can flow into the space.
  • the core or copper tube may be desirable to provide the core or copper tube with an axial groove through which air can flow back to the air-collecting space if the tube should be first pressed into contact with the core at the rear end of the billet upon a pressure increase in the pressure chamber.
  • the invention makes it possible to have considerable clearance between the core and the casing without any risk that the enclosed air volume will cause any disturbance during the compression or that air pockets will exist in the finished product.
  • FIG. 1 shows schematically a section through a pressure chamber with a billet inserted and
  • FIG. 2 shows on a larger scale the rear end of a billet with an alternative design of an air-collecting space.
  • 1 designates a press stand and 2 a pressure-generating piston which is arranged in an hydraulic pressure device, not otherwise shown, in which there is a cylinder to operate the piston 2.
  • the pressure chamber comprises a high pressure cylinder 3 which is constructed of a steel cylinder 4, a strip sheath 5 of rectangular tape of high strength wound on under prestress, and end pieces 6. Between the end closures6 and a spacing sleeve 7 in the cylinder are two seals 8 and 9 sealing between the cylinder 4 and the extrusion die 10 and piston 2, respectively.
  • a billet 11 consisting of a core 12 of aluminum or an allumiunm alloy and a surrounding casing 13 of copper or a copper alloy.
  • the radial clearance for a core having a diameter of mm may be 5 mm or more.
  • the clearance is usually between I and 5 mm.
  • a steel plate 15 is inserted at the rear end of the billet.
  • a lidshaped seal of elastomeric material surrounds the rear end of the billet and covers the joint between the plate 15 and the casing 13 and thus prevents the surrounding pressure medium 17 from penetrating into the gap 14.
  • the plate 15 has a section "18 which projects into the tube 13.
  • the projection 18 has a triangular bevelling 19.
  • the tube 13 is supported by the projection 18.
  • the tube 13 thus acquires a certain support so that it will be pressed against the billet 12 before the tube material is pressed into the triangular air-collecting space 20 formed by the tube 13, the triangular bevelling l9 and the end surface of the core 12.
  • the core may be provided with at least one axial groove 21 through which air can flow from the front end of the billet to the aircollecting space.
  • FIG. 2 shows an embodiment of the billet in which the steel plate 15 is provided with a bowl-shaped aircollecting space 22 and radial grooves 23 through which the space 22 communicates with the triangular, annular space 20.
  • the bevelling 19 may be provided with slots 24 through which air can flow to the slots 23 when the copper casing is forced into the space 20.
  • Method of manufacturing rods or wire of compound material having a core consisting essentially of aluminum and a casing consisting essentially of copper surrounding the core by means of hydrostatic extrusion of a billet formed from a core and a casing wherein the casing is sealed at the rear end of the billet and surrounds the core, which comprises inserting said billet in a pressure chamber and forcing the billet under the influence of a hydrostatic pressure through a die with an opening shaped to the desired cross-section, in which the billet is formed from a core having a smaller external diameter than the internal diameter of the easing, thereby providing a clearance therebetween which exceeds deformations normally occurring during annealing of the casing in which an internal space is provided at the rear of the billet to collect in the gap between the core and the casing air which is displaced when the core and the casing are pressed into adhering contact with each other.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
US00226759A 1971-03-04 1972-02-16 Method of manufacturing rods or wire of compound material Expired - Lifetime US3777362A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE02756/71A SE364884B (fr) 1971-03-04 1971-03-04

Publications (1)

Publication Number Publication Date
US3777362A true US3777362A (en) 1973-12-11

Family

ID=20260623

Family Applications (1)

Application Number Title Priority Date Filing Date
US00226759A Expired - Lifetime US3777362A (en) 1971-03-04 1972-02-16 Method of manufacturing rods or wire of compound material

Country Status (7)

Country Link
US (1) US3777362A (fr)
CA (1) CA947700A (fr)
DE (1) DE2209728A1 (fr)
FR (1) FR2128586B1 (fr)
GB (1) GB1372652A (fr)
NL (1) NL7202721A (fr)
SE (1) SE364884B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866306A (en) * 1973-01-30 1975-02-18 Asea Ab Method of hydrostatically extruding compound material and compound billets
US3874066A (en) * 1972-04-11 1975-04-01 Garphytte Bruk Ab Preparation of compound wire
US3926023A (en) * 1974-02-06 1975-12-16 Sumitomo Electric Industries Hydrostatic extrusion process for producing fine gauge wires
US4037305A (en) * 1975-09-24 1977-07-26 Allmanna Svenska Elektriska Aktiebolaget Method for hydrostatic extrusion
US5041041A (en) * 1986-12-22 1991-08-20 Gte Products Corporation Method of fabricating a composite lamp filament
WO1999021667A1 (fr) * 1997-10-25 1999-05-06 Gkss-Forschungszentrum Geesthacht Gmbh Dispositif d'encapsulage d'ebauches en alliages metalliques haute temperature
CN109013729A (zh) * 2018-08-21 2018-12-18 中山麓科睿材科技有限公司 一种氧化铝弥散铜合金的静液挤压工艺

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924877A (en) * 1945-05-22 1960-02-16 Edward C Creutz Method of jacketing a fissionable body
US3604102A (en) * 1968-01-03 1971-09-14 Cnen Process for effecting metallurgical joints between two different metals and the products obtained thereby
US3631586A (en) * 1967-09-14 1972-01-04 British Insulated Callenders Manufacture of copper-clad aluminum rod
US3698067A (en) * 1969-09-23 1972-10-17 Sulzer Ag Method for mounting a pipe in a perforated plate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924877A (en) * 1945-05-22 1960-02-16 Edward C Creutz Method of jacketing a fissionable body
US3631586A (en) * 1967-09-14 1972-01-04 British Insulated Callenders Manufacture of copper-clad aluminum rod
US3604102A (en) * 1968-01-03 1971-09-14 Cnen Process for effecting metallurgical joints between two different metals and the products obtained thereby
US3698067A (en) * 1969-09-23 1972-10-17 Sulzer Ag Method for mounting a pipe in a perforated plate

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874066A (en) * 1972-04-11 1975-04-01 Garphytte Bruk Ab Preparation of compound wire
US3866306A (en) * 1973-01-30 1975-02-18 Asea Ab Method of hydrostatically extruding compound material and compound billets
US3926023A (en) * 1974-02-06 1975-12-16 Sumitomo Electric Industries Hydrostatic extrusion process for producing fine gauge wires
US4037305A (en) * 1975-09-24 1977-07-26 Allmanna Svenska Elektriska Aktiebolaget Method for hydrostatic extrusion
US5041041A (en) * 1986-12-22 1991-08-20 Gte Products Corporation Method of fabricating a composite lamp filament
WO1999021667A1 (fr) * 1997-10-25 1999-05-06 Gkss-Forschungszentrum Geesthacht Gmbh Dispositif d'encapsulage d'ebauches en alliages metalliques haute temperature
US6420051B1 (en) * 1997-10-25 2002-07-16 Gkss-Forschungszentrum Gaesthacht Gmbh Device for encapsulating blanks of high temperature metallic alloys
CN109013729A (zh) * 2018-08-21 2018-12-18 中山麓科睿材科技有限公司 一种氧化铝弥散铜合金的静液挤压工艺

Also Published As

Publication number Publication date
SE364884B (fr) 1974-03-11
FR2128586A1 (fr) 1972-10-20
FR2128586B1 (fr) 1975-10-24
CA947700A (en) 1974-05-21
NL7202721A (fr) 1972-09-06
DE2209728A1 (de) 1972-09-14
GB1372652A (en) 1974-11-06

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