US3810379A - Apparatus for the extrusion of billets - Google Patents

Apparatus for the extrusion of billets Download PDF

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Publication number
US3810379A
US3810379A US00263104A US26310472A US3810379A US 3810379 A US3810379 A US 3810379A US 00263104 A US00263104 A US 00263104A US 26310472 A US26310472 A US 26310472A US 3810379 A US3810379 A US 3810379A
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US
United States
Prior art keywords
container
ram
disk
extrusion
billet
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
US00263104A
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English (en)
Inventor
F Schloegelhofer
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.)
Austria Metall AG
Vereinigte Metallwerke Ranshoffen Berndorf AG
Original Assignee
Vereinigte Metallwerke Ranshoffen Berndorf AG
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 Vereinigte Metallwerke Ranshoffen Berndorf AG filed Critical Vereinigte Metallwerke Ranshoffen Berndorf AG
Application granted granted Critical
Publication of US3810379A publication Critical patent/US3810379A/en
Assigned to AUSTRIA METALL AKTIENGESELLSCHAFT reassignment AUSTRIA METALL AKTIENGESELLSCHAFT CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE 12/11/84 Assignors: VEREINIGTE METALLWERKE RANSHOFEN-BERNDORF AKTIENGESELLSHCAFT
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
    • B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
    • B21C35/04—Cutting-off or removing waste
    • 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
    • B21C26/00—Rams or plungers; Discs therefor

Definitions

  • the present invention relates to the extrusion of billets and, more particularly, to an improved method of and apparatus for the extrusion of billets of nonferrous metal.
  • the cleaning operation takes place only during movement in onedirection and frequently is insufficient or ineffective for a satisfactory removal of traces of materials previously processed in the press, giving rise to the incorporation of such foreign materials in the extruded body, the formation of air pockets and the develop ment of piping defects in the extruded body.
  • Another object of the invention is to provide an improved method of extruding metals, especially nonferrous metals, whereby contamination and damage to the extruded product can be avoided.
  • a system for the hot extrusion of metal billets, particularly billets of a nonferrous metal which comprises a billet container terminating at one end in a die provided with an extrusion orifice and receiving, at the other end, the usualpress ram or plunger, together with a lining-forming press disk ahead of the ram.
  • the leading or forward end of the ram is provided with a double-acting ejection disk which closely fits against the cylindrical wall of the cylinder bore receiving the billet and is effective upon movement of the plunger or ram in both directions to clean the wall and remove any residue therefrom.
  • the press disk defines with the forward end of the'plunger or ram a compartment receiving the major part of the residue of the extrudable material when the assembly of ram and disk are thrusted fully intothe bore so that the space ahead of the ejection disk is completely filled with the extrudable material.
  • the ejector disk has a doubly frustoconical configuration with flanks diverging outwardly from a central plane perpendicular to its axis toward the forward and rearward faces of these disks todefine cleaning edges having an acute-angle profile at these faces.
  • the disk is preferably slit or split and may be biased outwardly, the slit lying at an angle to a generatrix of the ejector disk.
  • the press disk is beveled rearwardly and/or provided with a step which opens rearwardly to define the compartment receiving the lining or skirt of extrudable material.
  • a press ram or plunger 1 which can be forced into the cylindrical bore 9 of a billet container 6 by means not otherwise illustrated, e.g., a hydraulic press system.
  • this system may include means for imparting a reverse impulsive or shock'force to the ram for the ejector phase ofits oper- .ation.
  • the ram 1 carries an ejector disk 2 in the form of a ring, the ejector disk 2 being solid or, as illustrated, split at 2a, the gap or slit Za-running at a slightly acute angle to a generatrix of the disk 2.
  • the rearward face 2b of the disk lying in a plane perpendicular to the axis 10, may define a cleaning edge 20 with an acute-angle flank 2d extending frustoconically outwardly from a median plane P of thedisk 2, also perpendicular to the axis 10.
  • the acute angle defined between the face 212 and the flank 2d is represented at a and may range between 2 and 15, preferably between 5 and 10.
  • a frustoconical divergent flank 2e of the ejector disk 2 terminates at the forward face 2f of the ejector disk in a cleaning edge 2g.
  • the flank 2e may include a similar angle a with the face 2f.
  • the disk 2 is mounted upon a cylindrical shank 3a of a bolt 3 which is threaded at 3b into the ram 1 and terminates in a large-diameter circular head 30 which defines a slight clearance 3d with the wall 9 of the billet container.
  • the head 30 of the bore may be so designed as to provide a limited axial play 2h between the leading face la'of the ram and the face 2b of the ejector disk 2. It has also been found to be advantageous to bevel the head 3c as shown at 3d.
  • the forward face 32 of the head 30 abuts the trailing face 4a of a. press disk 4, the function of which is to define the lining or skirt 5 of the extrudable material along the wall 9 of the billet container.
  • the press disk 4 may include a large-diameter shoulder 4b defining a relatively small clearance 4c between itself and the cylinder wall 9 into which the material of the billet 8 is backextruded during the press operation. He hind the shoulder 40 is the body 4d of the press disk which maydefine a somewhat larger clearance 4e with the wall 9 to permit backflow of the extrudable material into a compartment 4f in which the press lining or skirt 5 is accommodated.
  • the rearward or trailing portion of the press disk 4 may be beveled or tapered rearwardly at 4g to define with the ram and the cylinder wall a compartment accommodating substantially the total volume of the lining material.
  • an extrusion die 7 whose orifice 7a defines the cross-section and configuration of the extruded rod or tube 19 formed from the billet 8. It should be understood that, where the press disk carries a mandrel or core, the extruded product can be a tube as opposed to the solid-cross-section body in the drawing.
  • the heated billet is inserted into the container 6 and is driven to the left by the ram 1 and the interposed press disk 4.
  • any residue of the extrudable material can be separated from the extruded body 19 by a shear or blade or remains connected to the press lining 5.
  • the ejector disk 2 is carried forwardly with the ram during the extrusion stroke and performs an initial clamping of the cylinder wall.
  • a method of operating a billet-extrusion press comprising the steps of:
  • a system for the extrusion of billets comprising:
  • a double-acting ejector disk fixed to said ram at a forward end thereof in the direction of extrusion of said material scraping the inner wall of said container and withdrawing the residue of extrudable material from said container and simultaneously cleaning same upon movement of said ram.
  • a system for the extrusion of billets comprising:
  • a double-acting ejector disk fixed to said ram at a forward end thereof in the direction of extrusion of said material scraping the inner wall of said container and'withdrawing the residue of extrudable material from said container and simultaneously cleaning same upon movement of said ram, said ejector disk being a ring and being split.
  • said ram includes a bolt having a shank, said ejector disk being mounted upon said shank.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Extrusion Of Metal (AREA)
US00263104A 1971-06-16 1972-06-15 Apparatus for the extrusion of billets Expired - Lifetime US3810379A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT518871A AT308496B (de) 1971-06-16 1971-06-16 Verfahren und Vorrichtung zum Strangpressen und Ausstoßen

Publications (1)

Publication Number Publication Date
US3810379A true US3810379A (en) 1974-05-14

Family

ID=3572934

Family Applications (1)

Application Number Title Priority Date Filing Date
US00263104A Expired - Lifetime US3810379A (en) 1971-06-16 1972-06-15 Apparatus for the extrusion of billets

Country Status (4)

Country Link
US (1) US3810379A (de)
AT (1) AT308496B (de)
DE (1) DE2228622A1 (de)
IT (1) IT958369B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2721362A1 (de) * 1977-05-12 1978-11-16 Demag Ag Ausstossvorrichtung fuer strangpressen
US4223546A (en) * 1975-05-02 1980-09-23 Swiss Aluminium Ltd. Extrusion press stem with at least one channel running approximately axially through it
US4989437A (en) * 1988-02-19 1991-02-05 Clecim Method and apparatus for extruding metal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815127A (en) * 1953-05-29 1957-12-03 Babcock & Wilcox Co Apparatus for cleaning an extrusion press container and for preventing spraying during cooling of the mandrel
US3034642A (en) * 1957-10-11 1962-05-15 Int Nickel Co Extrusion of metal
US3073442A (en) * 1958-12-22 1963-01-15 Hydraulik Gmbh System for thermally separating the stump from the extrusion and for straightening the latter in a metal rod or pipe press
US3563079A (en) * 1968-11-21 1971-02-16 Reynolds Metals Co Indirect extrusion with skull skimming

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815127A (en) * 1953-05-29 1957-12-03 Babcock & Wilcox Co Apparatus for cleaning an extrusion press container and for preventing spraying during cooling of the mandrel
US3034642A (en) * 1957-10-11 1962-05-15 Int Nickel Co Extrusion of metal
US3073442A (en) * 1958-12-22 1963-01-15 Hydraulik Gmbh System for thermally separating the stump from the extrusion and for straightening the latter in a metal rod or pipe press
US3563079A (en) * 1968-11-21 1971-02-16 Reynolds Metals Co Indirect extrusion with skull skimming

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4223546A (en) * 1975-05-02 1980-09-23 Swiss Aluminium Ltd. Extrusion press stem with at least one channel running approximately axially through it
DE2721362A1 (de) * 1977-05-12 1978-11-16 Demag Ag Ausstossvorrichtung fuer strangpressen
US4989437A (en) * 1988-02-19 1991-02-05 Clecim Method and apparatus for extruding metal

Also Published As

Publication number Publication date
AT308496B (de) 1973-07-10
IT958369B (it) 1973-10-20
DE2228622A1 (de) 1972-12-21

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Legal Events

Date Code Title Description
AS Assignment

Owner name: AUSTRIA METALL AKTIENGESELLSCHAFT

Free format text: CHANGE OF NAME;ASSIGNOR:VEREINIGTE METALLWERKE RANSHOFEN-BERNDORF AKTIENGESELLSHCAFT;REEL/FRAME:004432/0638

Effective date: 19850604