US3756054A - Method of manufacturing rods or wire of compound material having non-circular cross-section by hydrostatic extrusion - Google Patents

Method of manufacturing rods or wire of compound material having non-circular cross-section by hydrostatic extrusion Download PDF

Info

Publication number
US3756054A
US3756054A US00224090A US3756054DA US3756054A US 3756054 A US3756054 A US 3756054A US 00224090 A US00224090 A US 00224090A US 3756054D A US3756054D A US 3756054DA US 3756054 A US3756054 A US 3756054A
Authority
US
United States
Prior art keywords
die
core
conical
cone angle
wire
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
US00224090A
Other languages
English (en)
Inventor
J Nilsson
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 US3756054A publication Critical patent/US3756054A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/02—Dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS 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

  • the present invention relates to a method of manufacturing rods or wire having non-circular crosssection, from 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.
  • the Prior Art It is known to use a compound billet for such an extrusion process formed of a core of aluminum and a casing of a copper tube surrounding the core.
  • the billet is inserted in a pressure chamber containing a pressure medium. Under influence of a high all-round hydrostatic pressure, the billet is extruded through an opening in a die and thus shaped to a product having the desired cross-section.
  • they are sealed together at the rear end of the billet, for example with a sealing ring or a lid of elastomeric material which prevents the pressure medium from penetrating between the core and the surrounding tube.
  • Wire or sections having non-circular cross-section, particularly having rectangular crosssection and large side ratio, covered with a thin copper casing have been difficult to extrude.
  • the material in the casing becomes thicker on the short sides than on the long sides.
  • the layer becomes thinnest in the middle of the long sides and the material in the aluminum core may break through the copper layer.
  • the geometrical shape of the die has an enormous influence on the result of the extrusion process, particularly when the product being extruded has a rectangular cross-section.
  • the inlet of the die has inner and outer parts of differing cone angles, the angle of the inner part being greater than that of the outer part.
  • the extrusion ratio should preferably lie between and 250, but may be as high as 500.
  • the double conical inlet opening of the die should be shaped so that the outer, first conical part is more pointed than the inner, second conical part.
  • the diameter at the transition between the conical parts of the inlet opening should be approximately equal to the greatest dimension of the die opening. For a rectangular extrusion opening, therefore, the diameter of the transition should be approximately equal to the diagonal of the rectangle.
  • the angle of the first cone should be 70- and the angle of the second cone lS5. Particularly good results have been achieved using angles of 7585 and l45, respectively.
  • FIG. 1 shows schematically a section through a pressure chamber during extrusion of a billet
  • FIG. 2 shows on a larger scale a view of the die from the inlet side and
  • FIGS. 3 and 4 sections through the die on the lines A-A and B-B of FIG. 2.
  • FIG. 1 designates a press stand and 2 a pressure-generating plunger arranged in a hydraulic press, not otherwise shown, in which there is a cylinder for operation of the plunger 2.
  • the pressure chamber includes a high pressure cylinder 3 constructed of a steel cylinder 4, a strip mantle 5 of rectangular highstrength strip metal wound on under pre-stressing, and end pieces 6. Between the end pieces 6 and a spacer 7, sealing rings 8 and 9 are arranged to provide seals between the cylinder 4 and the extrusion die 10 and the piston 2, respectively.
  • a billet 11 comprising a core 12 of aluminum or an aluminum alloy and a casing 13 of copper or a copper alloy surrounding the core.
  • annular groove 14 in the core in which lies a ring 15 which prevents the pressure medium 16 from penetrating between the core and the casing. In this way the surfaces are kept free from contamination and a high pressure is obtained between the core and the casing, which gives good adhesion.
  • the adhesion can be further improved by providing the core 12 with an additional groove 18.
  • An extruded bar is designated 17.
  • 20 designates the double conical inlet opening.
  • 21 is the outer, first conical part of the inlet opening and 22 its inner, second conical part.
  • the cone angles are designated a and I3
  • the rectangular extrusion opening is designated 23 and its diagonal D, the width B and the height B.
  • Method of manufacturing rods or wire of compound material, having non-circular cross-section, with a core consisting essentially of aluminum and a casing consisting essentially of copper surrounding the core by means of hydrostatically extruding a billet composed of a core and a casing surrounding the core and sealed to the core at the rear end of the billet, which comprises inserting said billet in a pressure chamber and extruding the billet under the influence of a hydrostatic pressure in a pressure medium in the chamber surrounding the billet through a die with an opening shaped to the desired cross-section, the die having a double conical inlet opening (20) and the outer, first conical part (21) having a cone angle (a) between 70 and 1 and the inner, second conical part (22) having a cone angle (B) between 130 and 150, the extruding ratio being greater than :1.
  • die for hydrostatically extruding sections having noncircular cross-section and a core of aluminum and easing of copper the die (10) having a double conical inlet opening (20) and the outer, first conical part (21) having a cone angle (a) between and 1 15 and the inner, second conical part (22) having a cone angle (B) between 130 and 150.
  • die opening (23) is rectangular and the diameter at the transition between the first and second conical parts (21, 22) of the inlet opening (20) is approximately equal to the length of the diagonal (D) of the die opening (23).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Metal Extraction Processes (AREA)
US00224090A 1971-02-12 1972-02-07 Method of manufacturing rods or wire of compound material having non-circular cross-section by hydrostatic extrusion Expired - Lifetime US3756054A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE01844/71A SE364885B (enrdf_load_stackoverflow) 1971-02-12 1971-02-12

Publications (1)

Publication Number Publication Date
US3756054A true US3756054A (en) 1973-09-04

Family

ID=20258936

Family Applications (1)

Application Number Title Priority Date Filing Date
US00224090A Expired - Lifetime US3756054A (en) 1971-02-12 1972-02-07 Method of manufacturing rods or wire of compound material having non-circular cross-section by hydrostatic extrusion

Country Status (7)

Country Link
US (1) US3756054A (enrdf_load_stackoverflow)
CA (1) CA956267A (enrdf_load_stackoverflow)
DE (1) DE2204257A1 (enrdf_load_stackoverflow)
FR (1) FR2125375B1 (enrdf_load_stackoverflow)
GB (1) GB1369920A (enrdf_load_stackoverflow)
NL (1) NL7201769A (enrdf_load_stackoverflow)
SE (1) SE364885B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886775A (en) * 1973-04-10 1975-06-03 Asea Ab Die for manufacturing rods or wire of compounds material with non-round cross-section
US3973428A (en) * 1975-04-07 1976-08-10 Westinghouse Electric Corporation Uniform land length die
US4036043A (en) * 1974-10-18 1977-07-19 Kobe Steel Ltd. Extrusion die for hot hydrostatic extrusion of aluminum and aluminum alloys
US4096721A (en) * 1977-04-25 1978-06-27 Western Electric Company, Inc. Hydrostatic extrusion methods and apparatus
CN103042065A (zh) * 2013-01-17 2013-04-17 上海理工大学 六通接头制造模具和制造方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2285941B (en) * 1994-01-27 1997-01-08 Alcan Int Ltd Extrusion method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2218459A (en) * 1937-07-08 1940-10-15 Singer Fritz Manufacture of articles from light metal alloys
US3583204A (en) * 1967-06-30 1971-06-08 Asea Ab Means for hydrostatic extrusion
US3620059A (en) * 1968-03-15 1971-11-16 Asea Ab Hydrostatic extrusion of compound material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2218459A (en) * 1937-07-08 1940-10-15 Singer Fritz Manufacture of articles from light metal alloys
US3583204A (en) * 1967-06-30 1971-06-08 Asea Ab Means for hydrostatic extrusion
US3620059A (en) * 1968-03-15 1971-11-16 Asea Ab Hydrostatic extrusion of compound material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886775A (en) * 1973-04-10 1975-06-03 Asea Ab Die for manufacturing rods or wire of compounds material with non-round cross-section
US4036043A (en) * 1974-10-18 1977-07-19 Kobe Steel Ltd. Extrusion die for hot hydrostatic extrusion of aluminum and aluminum alloys
US3973428A (en) * 1975-04-07 1976-08-10 Westinghouse Electric Corporation Uniform land length die
US4096721A (en) * 1977-04-25 1978-06-27 Western Electric Company, Inc. Hydrostatic extrusion methods and apparatus
CN103042065A (zh) * 2013-01-17 2013-04-17 上海理工大学 六通接头制造模具和制造方法

Also Published As

Publication number Publication date
DE2204257A1 (de) 1972-08-31
SE364885B (enrdf_load_stackoverflow) 1974-03-11
NL7201769A (enrdf_load_stackoverflow) 1972-08-15
CA956267A (en) 1974-10-15
GB1369920A (en) 1974-10-09
FR2125375B1 (enrdf_load_stackoverflow) 1975-10-24
FR2125375A1 (enrdf_load_stackoverflow) 1972-09-29

Similar Documents

Publication Publication Date Title
US3756054A (en) Method of manufacturing rods or wire of compound material having non-circular cross-section by hydrostatic extrusion
US3620059A (en) Hydrostatic extrusion of compound material
US3344636A (en) Extrusion of metals
US3886775A (en) Die for manufacturing rods or wire of compounds material with non-round cross-section
US3580019A (en) Method of manufacturing rod, shaped and tubular products from difficult-to-work metals and alloys, preferably high melting-point and chemically active ones
US3967485A (en) Method for extruding brittle materials
US3780554A (en) Method of manufacturing extruded rods of wire from compound material
US3579800A (en) Production of elongated extrusions composed of titanium base metal
US3451241A (en) Methods of hydrostatic extrusion
US3354685A (en) Hydrostatic extrusion apparatus
US3817069A (en) Continuous hydrostatic extrusion die assembly and method for using it in forming extruded parts
GB1103749A (en) Improvements in methods of shaping metals under high hydrostatic pressure
US3014583A (en) Extrusion apparatus
US3914981A (en) Die for hydrostatic extrusion
US3866306A (en) Method of hydrostatically extruding compound material and compound billets
US3686910A (en) Methods of and apparatus for hydrostatic forming
US3892114A (en) Containers for use in extrusion press and method of manufacturing the same
US3751955A (en) Method of preventing complete extrusion of a billet during hydrostatic extrusion
GB1201464A (en) High pressure containers for cyclically varying pressures
US3877272A (en) Method for hydrostatic extrusion of tubes and billets
US3789642A (en) Method for hydrostatic extrusion of tubes
US3766769A (en) Method of and means for commencing a deforming operation, e. g., hydrostatic extrusion of a billet
US3805574A (en) Equipment for extrusion
US4138871A (en) Liquid pressure extrusion method and device for tube or tubular member
US3513676A (en) Hydrostatic extrusion apparatus