US3533264A - Device for fastening the operating die or ram in an extrusion press - Google Patents

Device for fastening the operating die or ram in an extrusion press Download PDF

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Publication number
US3533264A
US3533264A US635900A US3533264DA US3533264A US 3533264 A US3533264 A US 3533264A US 635900 A US635900 A US 635900A US 3533264D A US3533264D A US 3533264DA US 3533264 A US3533264 A US 3533264A
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US
United States
Prior art keywords
ram
centering ring
face
fastening
piston
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
US635900A
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English (en)
Inventor
Siegfried Quante
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.)
Lyndex Recycling Systems Ltd
Original Assignee
Lindemann Maschinenfabrik GmbH
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 Lindemann Maschinenfabrik GmbH filed Critical Lindemann Maschinenfabrik GmbH
Application granted granted Critical
Publication of US3533264A publication Critical patent/US3533264A/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 OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/21—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 OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/21—Presses specially adapted for extruding metal
    • 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
    • B21C23/21—Presses specially adapted for extruding metal
    • B21C23/212—Details

Definitions

  • My invention relates to a device for fastening and centering the driven die or rain in an extrusion press by hydraulic clamping pistons arranged in the ram holder.
  • the ram is axially inserted into a holder and is fastened therein by hydraulically operated slides inclined on the horizontal and distributed around the circumference of the ram holder.
  • the end faces of the slides engage radially into an annular groove in the base of the ram.
  • the ram is provided with an axially movable centering ring whose conical opening cooperates with a corresponding conical face of the ram.
  • the centering ring and conical face of the ram are provided with complementary grooves and can be mutually locked in the manner of a bayonet joint.
  • This known device has the disadvantage that the ram must be axially introduced into the holder and that the exact guiding of the ram, whose claws must be introduced into the grooves of the centering ring, necessitates special assembly tools.
  • the ram when the ram is to be taken out, it must first be pulled in axial direction out of the holder before it can be taken out of the press.
  • the centering by the slides which are only slightly inclined relative to the horizontal, is quite defective, so that in the known device the centering ring must be pressed by special compression springs against the conical face of the ram or respectively, in the direction of the counter-bearing of the main driving piston.
  • the problem underlying the invention consists in providing a fastening and centering device of simple design which permits the operating die or ram to be easily and M 3,533,264 Ice Patented Oct. 13, 1970 quickly inserted into and removed from its holder in the press without the use of special tools.
  • this problem is solved by arranging in the ram holder on each side of its longitudinal center two clamping chucking pistons whose longitudinal axes converge and are inclined toward the axis of the ram, the piston faces bearing against guide tracks or flats of a centering ring resting in a horseshoe-shaped open-top opening of the ram holder.
  • the special advantage of the device according to my invention results from the fact that the forces exerted by the clamping or chucking pistons on the centering ring divide into two components, one of which presses the rain embraced by the centering ring against its axial counterbearing, while the other component presses the center ring with the ram against its rear counter-bearing lying in the direction of insertion. In this way an exact adjustment of the ram in relation to the central axis of the press is always insured.
  • a further advantage of my improved device consists therein that the ram at its free end has a centric threaded bore with eyebolt and a looking pin or bolt to be inserted into the eye of the bolt.
  • FIG. 1 a side view, partly in section, as defined by line I-I in FIG. 2, of an extrusion press provided with the fastening and centering device according to the invention;
  • FIG. 2 a vertical longitudinal section along line II-II in FIG. 1;
  • FIG. 3 a horizontal section along line III-III of FIG. 1;
  • FIG. 4 an enlarged partial side view of the centering ring resting in the ram holder of the extrusion press
  • FIG. 5 a horizontal longitudinal section along line V-V of FIG. 4;
  • FIG. 6 a vertical section through the centering ring along line VI-VI of FIG. 4;
  • FIG. 7 a horizontal section through a part of the press, the ram being locked in the receiver during disassembly.
  • a cylinder 8 which houses a driving piston 9.
  • a cradled cross support 11 is fastened by screws 12 to a piston 9 and includes a substantially horseshoeshaped open-top opening 10 in which centering ring 13 rests which receives and holds the head portion of ram 14.
  • the central opening of the centering ring 13 is at least partially conical dilating towards the piston 9 and the therein received head portion of the ram 14 has a cooperating conical surface.
  • the support 11 is desirably guided by the standards 7 of the press frame.
  • the centering ring 13 is provided on its accessible top surface with an eyelet 15, into which a jack can be hooked.
  • the centering ring 13 has in the border portion of its front face (FIGS. 4 and 5) upwardly converging longitudinal bearing faces 16, 17 against which bear the frontal faces of clamping pistons 18, 19 located in conforming bores in the cradled support 11, said bores longitudinally converging and being inclined toward the axis of the ram 14.
  • the inclined position of the clamping pistons 18, 19 effects that after insertion of the centering ring 13 with the ram 14, when the driving piston 9 is pressure-loaded, the ram 14 is pressed by the centering ring 13 against its counter-bearing face 21 of the drive piston 9 as well as against the cylindrical contact face 22 of the horseshoe-shaped opening 10 acting as radial counter-bearing.
  • the clamping pistons 18, 19 are connected by channels 24 or by not shown pipings with a pressure source, said pipings including according to the invention a check valve between which and the clamping pistons 18, 19 a hydraulic accumulator is arranged.
  • the clamping pistons 18, 19 are connected by a three- Way valve with a pressure source, so that the centering ring 13 with ram 14 are pressed against the axial counter-bearing face 21 and against the radial counter-bearing face 22 thereby the ram 14 being centered.
  • a certain amount of play is provided between the cylindrical inner wall of the horseshoe-shaped opening 10 of the cradled support 11 and the outer surface of the centering ring 13.
  • the said play effects that the clamping pistons 18, 19, when the maximal retractile force of the press pulls the ram 14 back, are pressed counter to the prevailing hydraulic pressure into their cylindrical bores by an amount corresponding to the assembly clearance until the centering ring 13 rests on the axial counter-bearing face 23.
  • the pressure medium thus displaced by the clamping pistons 18, 19 is taken up by the accumulator, thereby causing a slight increase of pressure which upon easing of the traction forces again presses the centering ring 13 with ram 14 against its counterbearing face 21, 22.
  • the space of the cylindrical bores of the clamping pistons 18, 19 is switched to outflow by a three-way valve operated manually or electrically, while the pressure medium supply from the accumulator is shut off.
  • a jack is hooked into the eyelet 15 on the centering ring 13, the same together with the ram 14 can in radial direction be pulled out of the horseshoe-shaped opening 10 in the support 11.
  • the operating flats 16, 17 arranged on the centering ring 13 then push the clamping pistons 18, 19 back into their cylindrical bores, so that the horseshoe-shaped opening 10 is completely freed for the insertion of a new centering ring with ram.
  • ram 14 is provided with an axial threaded bore 26, into which an eyebolt 27 can be screwed.
  • an eyebolt 27 By insertion of a lockbolt 28 into the ring of the eyebolt 27, the ram 14 is locked in the receiver 25.
  • Disassembly is then effected in that first the receiverholder 29 with the receiver 25 is moved in the direction of the ram 14 which is locked in the receiver 25 by said lockbolt 28 and eyebolt 27. After the return movement of the receiver-holder 29, there is exposed at the receiver shell 31 an eyelet into which a gripping tool 32 can be hooked for lifting the receiver 25 and the ram 14 with 4 the centering ring 13 (FIG. 7). As soon as the receiverholder 29 is completely moved back i.e. pulled off the receiver 25, the latter and ram 14 with centering ring 13 can be lifted out of the machine together.
  • a device for fastening and centering the operating die or ram comprising in combination a machine frame; a power cylinder with driving piston 'mounted therein; a ram operated by said piston; a supporting member for the ram attached to the outer face portion of said piston and having a substantially horseshoe-shaped cradled interior open at its top and a cylindrical bottom; a centering ring embracing the ram and adapted to be introduced into said supporting member through its open top to slidably rest upon said cylindrical bottom; the centering ring having a central conical opening dilating towards the outer face portion of the driving piston; one end of the cam contacting said outer face portion of the piston; a pair of borings in the supporting member, said borings arranged symmetrically to the longi tudinal axis of the ram and converging in slanted position towards the driving piston; a clamping piston in each of said slanted borings having a power loaded end face and an operating end face; and operating flat
  • a device comprising a hydraulic power piping leading towards said clamping pistons and a hydraulic accumulator within said piping.
  • a device comprising a receiver shell cooperating with the ram and an eyelet thereupon for lifting the same with the ram out of the machine frame.
  • a device for fastening the ram to the driving piston comprising:
  • a device for fastening the ram to the driving piston comprising:
  • pistons of the dual 10 1 05 7 2 1954 France piston means each have a substantially planar operating end face adapted to contact a corresponding face on CHARLES W. LANHAM, Primary Examiner the ram A. L. HAVIS, As 1 tant Examiner 8.
  • pistons of the s 5 dual piston means are arranged symmetrically to the 15 U.S. C1.X.R..

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Press Drives And Press Lines (AREA)
US635900A 1966-05-13 1967-05-03 Device for fastening the operating die or ram in an extrusion press Expired - Lifetime US3533264A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL0053577 1966-05-13

Publications (1)

Publication Number Publication Date
US3533264A true US3533264A (en) 1970-10-13

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US635900A Expired - Lifetime US3533264A (en) 1966-05-13 1967-05-03 Device for fastening the operating die or ram in an extrusion press

Country Status (3)

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US (1) US3533264A (de)
DE (1) DE1527809C3 (de)
GB (1) GB1176948A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11059084B2 (en) * 2018-07-09 2021-07-13 No.59 Research Institute Of China Ordnance Industry Forward and backward extrusion composite forming method using mould having open inner cavity

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US498304A (en) * 1893-05-30 Apparatus for shaping steel
FR1054873A (fr) * 1952-02-12 1954-02-15 Cie Francaise Du Bi Metal Perfectionnements aux presses à filer les métaux
DE949558C (de) * 1955-02-25 1956-09-20 Schloemann Ag Halterung des Pressstempels am Pressenlaufholm von Strangpressen
DE1036795B (de) * 1956-06-21 1958-08-21 Paul Wieghardt Dipl Ing Stehende Presse zum Ummanteln von Kabeln und anderen Erzeugnissen mit Blei oder Aluminium
AT216865B (de) * 1958-12-01 1961-08-25 Loewy Eng Co Ltd Anordnung zum Anbringen eines Preßstempels an einem Halter, insbesondere für Metallstrangpressen
US3256729A (en) * 1964-08-26 1966-06-21 Anaconda American Brass Co Method and apparatus for extrusion with mutiple containers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US498304A (en) * 1893-05-30 Apparatus for shaping steel
FR1054873A (fr) * 1952-02-12 1954-02-15 Cie Francaise Du Bi Metal Perfectionnements aux presses à filer les métaux
DE949558C (de) * 1955-02-25 1956-09-20 Schloemann Ag Halterung des Pressstempels am Pressenlaufholm von Strangpressen
DE1036795B (de) * 1956-06-21 1958-08-21 Paul Wieghardt Dipl Ing Stehende Presse zum Ummanteln von Kabeln und anderen Erzeugnissen mit Blei oder Aluminium
AT216865B (de) * 1958-12-01 1961-08-25 Loewy Eng Co Ltd Anordnung zum Anbringen eines Preßstempels an einem Halter, insbesondere für Metallstrangpressen
US3256729A (en) * 1964-08-26 1966-06-21 Anaconda American Brass Co Method and apparatus for extrusion with mutiple containers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11059084B2 (en) * 2018-07-09 2021-07-13 No.59 Research Institute Of China Ordnance Industry Forward and backward extrusion composite forming method using mould having open inner cavity

Also Published As

Publication number Publication date
DE1527809B2 (de) 1974-07-25
DE1527809A1 (de) 1970-04-16
GB1176948A (en) 1970-01-07
DE1527809C3 (de) 1975-03-06

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