US3611778A - Aligning device for metal extruding presses - Google Patents

Aligning device for metal extruding presses Download PDF

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Publication number
US3611778A
US3611778A US782799A US3611778DA US3611778A US 3611778 A US3611778 A US 3611778A US 782799 A US782799 A US 782799A US 3611778D A US3611778D A US 3611778DA US 3611778 A US3611778 A US 3611778A
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US
United States
Prior art keywords
container
ram
die
axis
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
US782799A
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English (en)
Inventor
Rene Hubert
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Individual
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Individual
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Publication date
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Publication of US3611778A publication Critical patent/US3611778A/en
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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, 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
    • B21C23/21—Presses specially adapted for extruding metal
    • B21C23/212—Details
    • B21C23/215—Devices for positioning or centering press components, e.g. die or container
    • 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
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, rods or tubes
    • B21C23/085—Making tubes
    • 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
    • B21C23/21—Presses specially adapted for extruding metal
    • B21C23/212—Details

Definitions

  • a press for hot extruding a billet into products comprising a container for holding and positioning the billet along an extrusion axis, a die positionable at one end of said container, and a ram approaching said container from the opposite end of the die for forcing the billet through the container and a hole in the die.
  • the ram, billet and container are aligned with the extrusion axis by an aligning means comprising a sleeve positioned concentrically and slideably about the ram and engageable with the container means in a manner to provide for thermal expansion of the container.
  • the present invention avoids the aforesaid drawbacks and insures a continuously correct alignment of the die, container and ram along the extrusion axis without any referance to the bulky motionless parts of the press.
  • a hot press for extruding billets into hollow products comprises a container, a die, a ram and a sleeve for aligning the ram and container.
  • the container roughly positions a billet along an extrusion axis but remains slightly movable normal to said axis and parallel with said axis.
  • the die is positioned at one end of the container and rests on to the press frame.
  • the ram approaches the container from the opposite end.
  • the container is aligned with the extrusion axis, i.e., the axis of the ram, by a sleeve which is positioned concentrically and slideably about the ram.
  • the sleeve is engageable with the container and may, for example, slide into a position enveloping and engaging the container along its entire length.
  • the engagement provides for thermal expansion of the container.
  • the sleeve and the container are slideably secured by a plurality of spaced guides and mating guideways.
  • the guideways are deeper than the protruding height of the guides to accommodate thermal expansion of the container.
  • the die is slightly movable relative to the extrusion axis.
  • the die has a frusto-conical surface engageable in a mating frusto-conical surface of the container whereby on enagement the die becomes precisely aligned with the extrusion axis.
  • the cooperating guides and guideways on the sleeve and on the container are respectively rulers (for example, three spaced from each other) protruding from the inside surface of the sleeve and positionedparallel to the axis of the ram and the guideways on the outside surface of the container are distributed in the same manner as the rulers to cooperate with them.
  • This arrangement makes the co-axiality or alignment along and about the axis of extrusion independent of differences in temperature between the sleeve and the container.
  • FIG. 1 is an axial section along the extrusion axis showing the container brought close to itsworking position but not yet sealed. At this stage, the die, the container and the ram are not coaxial.
  • FIG. 2 is the same axial section as FIG. 1 showing the press where an extrusion has just begun.
  • FIG. 3 is a cross section along lines III-III of FIG. 2 (seen from the right).
  • FIGS. 1 and F2 are sections along lines II of FIG. 3. In all three figures, the same numbers have the same meaning.
  • container 1 is integral with its carrier 2 and its outside surface has a circular cross section along some 240.
  • Carrier 2 may hold other containers capable of being brought into working position.
  • the hot billet 3 has been previously pierced or bored. It is followed by the dummy block 4.
  • the die holder 5, equipped with a die insert is in contact with a backup bolster 6 aflixed to the frame of the press (not shown).
  • the die holder can be slightly moved normal to the extrusion axis under the urging of the container 1 when the frusto-conical recess 7 at the end of the container engages the frustoconical outside surface 8 of the die holder.
  • the ram 9 is integral with the non-shown piston of a hydraulic press which defines the extrusion axis, that is, the working axis of the press.
  • the press is, of course, mounted to the same frame as the backup bolster.
  • This ram is bored to accept a mandrel 10. It is enveloped with a very small clearance by a sleeve 11 which can slide along the ram body, while remaining co-axial with it.
  • the front part 12 of the sleeve 11 can envelop the container 1 with the clearance sufficient for permitting a thermal dilation or expansion of the container 1. When this is done, the carrier 2 occupies the space 12' provided in the sleeve.
  • the inside of the front part of the sleeve 12 includes three longitudinal rulers (guides) 13, 13' and 13" distributed at 120 from one another and capable of sliding along the parallel sides of the longitudinal grooves (guideways) 14, 14' and 14", which have been machined with an excess in depth, on the outside surface of the container 1. This permits the container to be aligned with the sleeve 11 and thus with the ram 9 whatever the working temperature of the container may be.
  • the front end 15 of each ruler 13 and the rear end 16 of each groove 14 are tangentially and radially chamfered to permit an easy engagement of the container when the sleeve 11 begins to move toward it.
  • the rear part of the sleeve 11 includes a front face 17 which can come into contact with the entry face of the container 1 and seal it through the die holder and the backup bolster 6.
  • FIG. 2 the die, the container, the ram and the mandrel are shown axially aligned.
  • the ram has begun to transmit the force of the press and extruded product appears at 20.
  • the press shown in the drawings operates as follows.
  • the container 1 previously loaded with a billet 3, a dummy block 4 and appropriate lubricating means is brought close to its working position by the carrier 2.
  • a die holder 5 equipped with a die insert is brought close to its working position also.
  • the sleeve 11 is then moved toward the container.
  • the ends 15 and 16 of cooperative elements 13 and 14 engage with each other. This generally causes the container slightly to move normally to its axis.
  • the front part 12 of the sleeve 11 has traveled along the whole length of the container 1, the latter is aligned with the axis of the ram.
  • a press for hot extruding a metal billet into products comprising means for containing and roughly positioning the billet along an extrusion axis, said containing means slightly moveable normal and parallel to said axis, a die positionable on one end of said containing means, a ram for forcing the billet through the containing means and a hole in the die, said ram approaching said containing means from the end opposite the die, the axis of said ram 4 defining the extrusion axis, means for aligning the containing means with the axis of said ram comprising a sleeve positioned coaxially and slideably about the ram, said aligning means sleeve engageable with the lateral surface of said containing means.
  • a press according to claim 1 in which the die is slightly moveable relative to the extrusion axis and has a frusto-conical surface engageable in a mating frustoconical surface in the container means whereby on engagement the die becomes aligned with the extrusion axis.
  • aligning means and containing means provide for thermal expansion being slideably secured by a plurality of spaced guides and mating guideways parallel to the axis of extrusion, said guideways being deeper than the protruding height of the guides.
  • a press according to claim 4 in which the ends of said guides and guideways which first come into reciprocal engagement are radially and longitudinally chamfered to permit easy connection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US782799A 1967-12-15 1968-12-11 Aligning device for metal extruding presses Expired - Lifetime US3611778A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR132414 1967-12-15

Publications (1)

Publication Number Publication Date
US3611778A true US3611778A (en) 1971-10-12

Family

ID=8643279

Family Applications (1)

Application Number Title Priority Date Filing Date
US782799A Expired - Lifetime US3611778A (en) 1967-12-15 1968-12-11 Aligning device for metal extruding presses

Country Status (5)

Country Link
US (1) US3611778A (it)
JP (1) JPS4821717B1 (it)
DE (1) DE1814392A1 (it)
FR (1) FR1560362A (it)
GB (1) GB1253819A (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839894A (en) * 1973-05-14 1974-10-08 Wean United Inc Positioning apparatus for containers of extrusion presses
US4244205A (en) * 1978-04-25 1981-01-13 Wean United Inc. Apparatus for aligning extrusion producing members of a press
US4592224A (en) * 1982-12-24 1986-06-03 Swiss Aluminium Ltd. Process and device for extruding a hollow section

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55102569U (it) * 1979-01-11 1980-07-17

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839894A (en) * 1973-05-14 1974-10-08 Wean United Inc Positioning apparatus for containers of extrusion presses
FR2229535A1 (it) * 1973-05-14 1974-12-13 Wean United Inc
US4244205A (en) * 1978-04-25 1981-01-13 Wean United Inc. Apparatus for aligning extrusion producing members of a press
US4592224A (en) * 1982-12-24 1986-06-03 Swiss Aluminium Ltd. Process and device for extruding a hollow section

Also Published As

Publication number Publication date
JPS4821717B1 (it) 1973-06-30
DE1814392A1 (de) 1969-07-03
FR1560362A (it) 1969-03-21
GB1253819A (en) 1971-11-17

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