US3583204A - Means for hydrostatic extrusion - Google Patents

Means for hydrostatic extrusion Download PDF

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Publication number
US3583204A
US3583204A US741006A US3583204DA US3583204A US 3583204 A US3583204 A US 3583204A US 741006 A US741006 A US 741006A US 3583204D A US3583204D A US 3583204DA US 3583204 A US3583204 A US 3583204A
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United States
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die
section
shaped
inlet
cross
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Expired - Lifetime
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US741006A
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Jan Nilsson
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ABB Norden Holding AB
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ASEA AB
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    • 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
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/02—Dies

Definitions

  • ABSTRACT A die for band extrusion having a calibrating part, a conical inlet channel and an intermediate chisel-shaped part.
  • the present invention relates to a means for hydrostatic extrusion intended for manufacturing a tape or bar, the cross section of which has at least one part the length of which is greater than its breadth, which means comprises a pressure chamber and a die arranged to form a part of the internal limiting surface of the pressure chamber with the inlet side of the die directed upwardly.
  • the Prior Art The die in known arrangements for hydrostatic extrusion is shaped with a circularly symmetrical inlet part directly above the calibrated part ofthe die.
  • a die according to the invention has a part of the inlet section chisel shaped. It has been found that, for example, copper and aluminum tape can be extruded in this way with considerably greater width/thickness ratio than is possible to achieve with known arrangements for hydrostatic extrusion.
  • the favorable effect of the object of the invention involves, among other things, that the additional pressure at the start of an extrusion process is negligible. Furthermore, uneven distribution of lubricating medium is prevented and corresponding surface defects on the extruded tape are avoided.
  • a device is characterized in that the die is shaped with a relatively short calibrating part seen in the direction of pressure, that is, of its longitudinal axis, and a chisel-shaped inlet channel lying at the entrance to the calibrating part, the smallest cross section of which substantially coincides with the opening in said calibrating part and the innermost cross section of which substantially coincides with the outermost cross section of an adjacent conical inlet part.
  • the apex angle of the chisel shape is chosen greater than the apex angle of the conical part.
  • FIG. I shows an axial section of the die included in the device
  • FIG. 2 the same die in an axial section perpendicular to the section of FIG. 1, and
  • FIG. 3 an end view seen in the direction indicated by arrows in FIG. 2.
  • FIGS. 4 and 5 show sideviews ofthe nose of the billet in two directions perpendicular to each other, FIG. 4 corresponding to FIG. I and FIG. 5 corresponding to FIG. 2.
  • FIG. 6 shows an example of a cross section which differs from rectangular shape and which, with a die having similarly shaped calibrating parts, can be extruded with the help of an arrangement according to the invention.
  • 1 designates the calibrating part of the die which is intended to shape a tape having a rectangular cross section.
  • the inlet part of the die is designed with a chiselshaped part 2 (that is, a part having divergent plane walls) having an apex angle of and a conical part 3 inside this, the apex angle of which is 45.
  • the corresponding parts of the nose of the billet are designated 2 and 3'.
  • the principle of the chisel-shaped inlet can also be used for sections other than those having rectangular cross section.
  • a means according to the invention is, for example, well suited for extrusion of an aluminum section having a cross section according to FIG. 6.
  • the die in this case has a conical inlet which is connected to an X-chisel-shaped" part and the nose of the billet is shaped accordingly.
  • the thickness t may, for example be 0.5 mm. and the dimension b 30 mm.
  • die for hydrostatic extrusion intended for manufacturing a tape or bar the cross section of which has at least one part the length of which is greater than its breadth, the die having an inlet side and an outlet side, the inlet side of the die being directed into the pressure chamber, in which the die is shaped with a relatively short calibrating part seen in the direction of its horizontal axis, a chisel-shaped inlet channel lying on the side of the calibrating part remote from the outlet side the smallest cross section of which substantially coincides with the opening in said calibrating part and an adjacent right circular conical inlet, the innermost cross section of said chisel-shaped inlet channel substantially coinciding with the outermost cross section of said conical inlet.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

A die for band extrusion having a calibrating part, a conical inlet channel and an intermediate chisel-shaped part.

Description

United States Patent Inventor Jan Nilsson Robertsfors, Sweden Appl. No. 741,006 Filed June 28, 1968 Patented June 8, 1971 Assignee Allmanna Svenska Elektriska Aktiebolaget Vasteras, Sweden Priority June 30, 1967 Sweden 9887 MEANS FOR HYDROSTATIC EXTRUSION 2 Claims, 6 Drawing Figs.
US. Cl 72/467, 72/25 3 Int. Cl B2lc 3/00, B2lc 23/00 Field of Search 72/253, 264, 273, 467
[56] References Cited UNITED STATES PATENTS 3,440,862 4/1969 Phillips..... 72/467 2,408,627 10/1946 Green 72/467X 2,146,788 2/1939 Blount..... 72/467X 3,364,718 1/1968 Green 72/253 FOREIGN PATENTS 375,279 12/1930 Great Britain 72/467 24,948 1 1/ 1907 Great Britain 72/467 Primary Examiner-Charles W. Lanham Assistant ExaminerR. M. Rogers Artorney.lennings Bailey, Jr.
ABSTRACT: A die for band extrusion having a calibrating part, a conical inlet channel and an intermediate chisel-shaped part.
PATENTED JUN 8|B7| 3583204 Fz'g/ 2 INVENTOR JAN N I LSSON BACKGROUND OF THE INVENTION 1. Field ofthe Invention The present invention relates to a means for hydrostatic extrusion intended for manufacturing a tape or bar, the cross section of which has at least one part the length of which is greater than its breadth, which means comprises a pressure chamber and a die arranged to form a part of the internal limiting surface of the pressure chamber with the inlet side of the die directed upwardly.
2. The Prior Art The die in known arrangements for hydrostatic extrusion is shaped with a circularly symmetrical inlet part directly above the calibrated part ofthe die.
SUMMARY OFTHE INVENTION A die according to the invention has a part of the inlet section chisel shaped. It has been found that, for example, copper and aluminum tape can be extruded in this way with considerably greater width/thickness ratio than is possible to achieve with known arrangements for hydrostatic extrusion. The favorable effect of the object of the invention involves, among other things, that the additional pressure at the start of an extrusion process is negligible. Furthermore, uneven distribution of lubricating medium is prevented and corresponding surface defects on the extruded tape are avoided.
A device according to the invention is characterized in that the die is shaped with a relatively short calibrating part seen in the direction of pressure, that is, of its longitudinal axis, and a chisel-shaped inlet channel lying at the entrance to the calibrating part, the smallest cross section of which substantially coincides with the opening in said calibrating part and the innermost cross section of which substantially coincides with the outermost cross section of an adjacent conical inlet part.
According to a preferred embodiment of the invention the apex angle of the chisel shape is chosen greater than the apex angle of the conical part.
BRIEF DESCRIPTION OF THE DRAWINGS A device according to the invention will be described in the following with reference to the accompanying schematical drawings where FIG. I shows an axial section of the die included in the device, i
FIG. 2 the same die in an axial section perpendicular to the section of FIG. 1, and
FIG. 3 an end view seen in the direction indicated by arrows in FIG. 2.
FIGS. 4 and 5 show sideviews ofthe nose of the billet in two directions perpendicular to each other, FIG. 4 corresponding to FIG. I and FIG. 5 corresponding to FIG. 2.
FIG. 6 shows an example of a cross section which differs from rectangular shape and which, with a die having similarly shaped calibrating parts, can be extruded with the help of an arrangement according to the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, 1 designates the calibrating part of the die which is intended to shape a tape having a rectangular cross section. The inlet part of the die is designed with a chiselshaped part 2 (that is, a part having divergent plane walls) having an apex angle of and a conical part 3 inside this, the apex angle of which is 45. The corresponding parts of the nose of the billet are designated 2 and 3'. When this is shaped it must be ensured that good contact is obtained between the conical parts of the billet and the die so that effective scaling is obtained when the extrusion is initiated. The chisel-shaped billet part is shaped so that it does not prevent contact between the parts 3 and 3', but otherwise so that it fills the die as far as possible.
The principle of the chisel-shaped inlet can also be used for sections other than those having rectangular cross section. A means according to the invention is, for example, well suited for extrusion of an aluminum section having a cross section according to FIG. 6. The die in this case has a conical inlet which is connected to an X-chisel-shaped" part and the nose of the billet is shaped accordingly. The thickness t may, for example be 0.5 mm. and the dimension b 30 mm.
Iclaim:
I. Die for hydrostatic extrusion intended for manufacturing a tape or bar the cross section of which has at least one part the length of which is greater than its breadth, the die having an inlet side and an outlet side, the inlet side of the die being directed into the pressure chamber, in which the die is shaped with a relatively short calibrating part seen in the direction of its horizontal axis, a chisel-shaped inlet channel lying on the side of the calibrating part remote from the outlet side the smallest cross section of which substantially coincides with the opening in said calibrating part and an adjacent right circular conical inlet, the innermost cross section of said chisel-shaped inlet channel substantially coinciding with the outermost cross section of said conical inlet.
2. Means as claimed in claim I, the apex angle of said chiselshaped inlet channel being greater than the apex angle of said conical part.

Claims (2)

1. Die for hydrostatic extrusion intended for manufacturing a tape or bar the cross section of which has at least one part the length of which is greater than its breadth, the die having an inlet side and an outlet side, the inlet side of the die being directed into the pressure chamber, in which the die is shaped with a relatively short calibrating part seen in the direction of its horizontal axis, a chisel-shaped inlet channel lying on the side of the calibrating part remote from the outlet side the smallest cross section of which substantially coincides with the opening in said calibrating part and an adjacent right circular conical inlet, the innermost cross section of said chisel-shaped inlet channel substantially coinciding with the outermost cross section of said conical inlet.
2. Means as claimed in claim 1, the apex angle of said chisel-shaped inlet channel being greater than the apex angle of said conical part.
US741006A 1967-06-30 1968-06-28 Means for hydrostatic extrusion Expired - Lifetime US3583204A (en)

Applications Claiming Priority (1)

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SE9887/67*A SE345399B (en) 1967-06-30 1967-06-30

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SE (1) SE345399B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747384A (en) * 1971-03-18 1973-07-24 Asea Ab Combined method of area reduction
US3756054A (en) * 1971-02-12 1973-09-04 Asea Ab Method of manufacturing rods or wire of compound material having non-circular cross-section by hydrostatic extrusion
US3765222A (en) * 1971-12-30 1973-10-16 Asea Ab Die for hydrostatic extrusion of sections having elongated projections
US3765221A (en) * 1971-03-19 1973-10-16 Asea Ab Die for hydrostatic extrusion of sections having elongated projections
DE2417953A1 (en) * 1973-04-11 1974-10-24 Kobe Steel Ltd HYDROSTATIC EXTRUSION PROCESS
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
US20050081594A1 (en) * 2003-10-20 2005-04-21 Segal Vladimir M. Twist-extrusion process
US20080202653A1 (en) * 2005-02-18 2008-08-28 Luvata Oy Extrusion of a Metal Alloy Containing Copper and Zinc

Families Citing this family (3)

* 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
GB2366226B (en) * 2000-08-30 2003-02-12 Luxfer Group Ltd Die tooling
CN102744283B (en) * 2012-08-01 2015-03-11 郑州机械研究所 Direct extrusion punch structure for improving stress state

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190724948A (en) * 1906-11-15 1908-11-11 Paul Antoine Paschetta Improvements in or relating to the Construction of Impermeable Surfaces, such as Roads and the like
GB375279A (en) * 1930-07-28 1932-06-23 Krupp Ag Improvements in press dies
US2146788A (en) * 1936-05-20 1939-02-14 Western Electric Co Wire-drawing die and method
US2408627A (en) * 1943-10-11 1946-10-01 Lee B Green Apparatus for extruding
US3364718A (en) * 1964-08-10 1968-01-23 Atomic Energy Authority Uk Extrusion apparatus
US3440862A (en) * 1967-02-02 1969-04-29 Carmet Co Draw die assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190724948A (en) * 1906-11-15 1908-11-11 Paul Antoine Paschetta Improvements in or relating to the Construction of Impermeable Surfaces, such as Roads and the like
GB375279A (en) * 1930-07-28 1932-06-23 Krupp Ag Improvements in press dies
US2146788A (en) * 1936-05-20 1939-02-14 Western Electric Co Wire-drawing die and method
US2408627A (en) * 1943-10-11 1946-10-01 Lee B Green Apparatus for extruding
US3364718A (en) * 1964-08-10 1968-01-23 Atomic Energy Authority Uk Extrusion apparatus
US3440862A (en) * 1967-02-02 1969-04-29 Carmet Co Draw die assembly

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756054A (en) * 1971-02-12 1973-09-04 Asea Ab Method of manufacturing rods or wire of compound material having non-circular cross-section by hydrostatic extrusion
US3747384A (en) * 1971-03-18 1973-07-24 Asea Ab Combined method of area reduction
US3765221A (en) * 1971-03-19 1973-10-16 Asea Ab Die for hydrostatic extrusion of sections having elongated projections
US3765222A (en) * 1971-12-30 1973-10-16 Asea Ab Die for hydrostatic extrusion of sections having elongated projections
DE2417953A1 (en) * 1973-04-11 1974-10-24 Kobe Steel Ltd HYDROSTATIC EXTRUSION PROCESS
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
US20050081594A1 (en) * 2003-10-20 2005-04-21 Segal Vladimir M. Twist-extrusion process
US7096705B2 (en) * 2003-10-20 2006-08-29 Segal Vladimir M Shear-extrusion method
US20080202653A1 (en) * 2005-02-18 2008-08-28 Luvata Oy Extrusion of a Metal Alloy Containing Copper and Zinc

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Publication number Publication date
JPS4844628B1 (en) 1973-12-26
GB1221359A (en) 1971-02-03
SE345399B (en) 1972-05-29

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