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EP2763805B1 - Dispositif de forgeage pour fabriquer une ébauche de piston et procédé pour fabriquer l'ébauche de piston au moyen du dispositif de forgeage - Google Patents

Dispositif de forgeage pour fabriquer une ébauche de piston et procédé pour fabriquer l'ébauche de piston au moyen du dispositif de forgeage Download PDF

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Publication number
EP2763805B1
EP2763805B1 EP12791078.4A EP12791078A EP2763805B1 EP 2763805 B1 EP2763805 B1 EP 2763805B1 EP 12791078 A EP12791078 A EP 12791078A EP 2763805 B1 EP2763805 B1 EP 2763805B1
Authority
EP
European Patent Office
Prior art keywords
forging
piston
piston blank
cavity
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.)
Active
Application number
EP12791078.4A
Other languages
German (de)
English (en)
Other versions
EP2763805A1 (fr
Inventor
Roland GRUNERT
Jürgen Friedrich
Timo Seng
Wolfgang Janisch
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.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
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Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP2763805A1 publication Critical patent/EP2763805A1/fr
Application granted granted Critical
Publication of EP2763805B1 publication Critical patent/EP2763805B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/18—Making machine elements pistons or plungers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/02—Dies or mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/02—Dies or mountings therefor
    • B21J13/025—Dies with parts moving along auxiliary lateral directions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • B21J5/025—Closed die forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/18—Making machine elements pistons or plungers
    • B21K1/185—Making machine elements pistons or plungers with cooling channels

Definitions

  • the invention relates to a forging apparatus for producing a piston blank, which has a piston crown and shaft elements attached to the piston crown, which are connected to one another via box walls, with a forging shape having a substantially cylindrical and the radial outer surface of the piston blank corresponding through recess, with a the one Side of the recess bounding forging, and with a center punch, which consists of a mandrel with a tapered approach attached thereto with a corresponding shape of the inner surface of the piston blank, and which is insertable via the other side of the recess with the approach in the forging ,
  • a forging apparatus for producing a piston blank and a method for forging the piston blank using the forging apparatus of the aforementioned type are known from Japanese Application JP 2000 005840 A known.
  • the disadvantage here is that the forging consists of two halves, which are pulled apart after completion of the forging process in the radial direction to eject the piston blank can.
  • Object of the present invention is to make a forging device such that in the top of the upsetting radially outward of the box walls, a circumferential cooling bag is formed. It is another object of the invention to provide a method for forging the piston blank using the forging, in which in the top of the upsetting radially outside the box walls, a circumferential cooling bag is formed.
  • the forging for forming the radially outer surfaces of the box walls and for forming a radially outside of the box walls arranged in the piston head circulating cooling bag has two side jaws, which in the forging device obliquely to the longitudinal axis of the forging in obliquely lying arrows are movably mounted, wherein the oblique arrows with the longitudinal axis of the forging include an acute angle.
  • Fig. 1 shows a forging apparatus 1 for press forging, which has a Gesenkmantel 2, which is slidably connected in the direction of the longitudinal axis 3 with a die plate 4.
  • a Gesenkmantel 2 In the middle of the Gesenkmantel 2 has a round opening 6, in which a Gesenkbuchse 7 is arranged, whose function is to lead a forging base 8 and a center punch 14.
  • the outer diameter of the piston blank 28 (via the inner diameter of the die sleeve 7) (FIG. Fig. 6 ).
  • the Gesenkmantel 2, the die plate 4 and the female socket 7 in this case give the lower die. 5
  • the forging base 8 located in the interior of the die sleeve 7 rests on a die plate 4.
  • a Stauchling 9 from which the piston blank 28 ( Fig. 6 ) will be produced.
  • the Stauchling 9 consists of AlSi12CuMgNi or AlSi12Cu3Ni2Mg and has a temperature of 480 ° C.
  • the other parts of the forging apparatus 1, namely side jaws 10 and 11 and hold-down 12 and 13, in addition to the center punch 14 at an in Fig. 1 Attached not shown hydraulic device. While the hold-down 12, 13 and the center punch 14 are movably mounted in the direction of parallel to the longitudinal axis 3 of the forging device 1 arrow 15, the side jaws 10 and 11 are movably mounted in the direction of the oblique arrows 16 and 17, wherein the oblique arrows 16 and 17 with the longitudinal axis 3 an angle ⁇ 20 ° and converge toward each other in the direction of the lower die 5.
  • the side jaws 10, 11 and the center punch 14 in this case form the upper die 18, which is formed in three parts in the present embodiment.
  • the side jaws 10, 11, the hold-down 12, 13 and the center punch 14 are arranged symmetrically to the longitudinal axis 3 of the forging apparatus 1.
  • the hold-downs 12 and 13 are moved in the direction of the arrow 15 down to the side jaws 10 and 11 ( Fig. 2 ) until they rest on the side jaws 10 and 11, as shown in FIG Fig. 3 is shown.
  • the Gesenkmantel 2 is then together with the side jaws 10 and 11 and the downholders 12 and 13 in the direction of the parallel to the longitudinal axis 3 of the forging device 1 lying arrow 19 (FIGS. Fig. 2 ) moves on the die plate 4 until the Gesenkmantel 2 rests on the die plate 4, as in Fig. 3 is shown.
  • a circumferential cooling pocket 20 is formed by the side jaws 10 and 11 in the Stauchling 9, the in Fig. 6 easy to recognize.
  • step ( Fig. 3 ) of the center punch 14 in the direction of the arrow 15 to the forging apparatus 1 moves, wherein the mandrel 21 enters the opening 22 between the side jaws 10 and 11 and, as it is in Fig. 4 is shown, insofar as acting on the Stauchling 9 that in this case between the mandrel 21 of the center punch 14 and the side jaws 10, 11, the shaft members 23 and the box walls 27, 27 'are formed ( Fig. 6 ).
  • the mandrel 21 has a conically downwardly tapering projection 24, which, together with the equally downwardly tapered inner walls 25, 26 of the side jaws 10, 11 ensure that, as it is in Fig. 6 is shown, the box walls 27, 27 'of the piston blank 28 are inclined and taper towards the piston head 29 of the piston blank 28 out.
  • the outer surface of the piston blank 28 is formed by a forging shape consisting of the side jaws 10, 11 and the die sleeve 7.
  • the radially outer, cylindrical lateral surface 30 of the piston crown 29 is in this case formed by the die sleeve 7, while for the formation of the radially outer surfaces of the box walls 27, 27 'and the circulating cooling bag 20, the side jaws 10, 11 are responsible.
  • Fig. 6 is the piston blank 28 made of aluminum produced in the context of the forging process described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Claims (6)

  1. Dispositif de forgeage (1) pour fabriquer une ébauche de piston (28), qui présente un fond de piston (29) et des éléments de tige (23) installés sur le fond de piston (29), qui sont reliés l'un à l'autre par des parois de caisson (27, 27'),
    - avec une forme de forgeage (7, 10, 11) présentant un évidement continu essentiellement cylindrique et correspondant à la surface extérieure radiale de l'ébauche de piston (28),
    - avec un fond de forgeage (8) limitant un premier côté de l'évidement, et
    - avec un poinçon central (14), qui se compose d'un mandrin (21) avec une pièce rapportée montée sur celui-ci et se terminant en forme de cône (24) avec une forme correspondant à la surface intérieure de l'ébauche de piston, et qui peut être introduit avec la pièce rapportée (24) à l'avant dans la forme de forgeage (7, 10, 11) par l'autre côté de l'évidement,
    caractérisé en ce que la forme de forgeage (7, 10, 11) présente, pour le formage des surfaces extérieures radiales des parois de caisson (27, 27') et pour le formage d'une poche de refroidissement périphérique (20), disposée radialement à l'extérieur des parois de caisson (27, 27') dans le fond de piston (29), deux mâchoires latérales (10, 11), qui sont montées dans le dispositif de forgeage (1) en oblique par rapport à l'axe longitudinal (3) du dispositif de forgeage (1) de façon mobile dans des directions pouvant être représentées par des flèches disposées en oblique (16, 17), dans lequel les flèches disposées en oblique (16, 17) forment avec l'axe longitudinal (3) du dispositif de forgeage (1) un angle de α ≤ 25° et se dirigent l'une vers l'autre en direction du fond de forgeage (8).
  2. Dispositif de forgeage (2) selon la revendication 1, caractérisé en ce que la forme de forgeage (7, 10, 11) présente une douille d'articulation tubulaire (7) disposée sur un premier côté de l'évidement pour le formage de la surface latérale radialement extérieure (30) du fond de piston (29).
  3. Procédé de forgeage d'une ébauche de piston (28), qui présente un fond de piston (29), et des éléments de tige (23) installés sur le fond de piston (29), qui sont reliés l'un à l'autre par des parois de caisson (27, 27'), en faisant application d'un dispositif de forgeage (1) selon la revendication 1, comprenant les étapes suivantes:
    - introduire une ébauche estampée chauffée (9), à partir de laquelle l'ébauche de piston (28) doit être forgée, dans un évidement essentiellement cylindrique d'un dispositif de forgeage (1), de telle manière qu'elle vienne se placer sur un fond de forgeage (8) disposé sur un premier côté de l'évidement,
    - former une poche de refroidissement périphérique (20) dans l'ébauche estampée (9) en utilisant deux mâchoires latérales (10, 11), dont les surfaces intérieures présentent la forme des surfaces extérieures radiales des parois de caisson (27, 27'), et qui sont montées dans le dispositif de forgeage (1) en oblique par rapport à l'axe longitudinal (3) du dispositif de forgeage (1) de façon mobile dans des directions qui peuvent être représentées par des flèches disposées en oblique (16, 17), dans lequel les flèches disposées en oblique (16, 17) forment avec l'axe longitudinal (3) du dispositif de forgeage (1) un angle α ≤ 25° et qui sont dirigées l'une vers l'autre en direction du fond de forgeage (8), par le fait que les mâchoires latérales (10, 11) sont pressées dans l'ébauche estampée (9),
    - introduire un poinçon central (14), qui se compose d'un mandrin (21) avec une pièce rapportée montée sur celui-ci et se terminant en forme de cône (24) avec une forme correspondant à la surface intérieure de l'ébauche de piston, avec la pièce rapportée (24) à l'avant, dans l'autre côté de l'évidement, dans lequel la pièce rapportée (24) agit sur l'ébauche estampée (9) et les parois de caisson (27, 27') se forment ainsi et forment les éléments de tige (23) qui sont reliés par celles-ci,
    - retirer le poinçon central (14) hors de l'évidement du dispositif de forgeage (1),
    - retirer les mâchoires latérales (10, 11) hors du dispositif de forgeage (1) dans des directions opposées aux flèches disposées en oblique (16, 17),
    - éjecter l'ébauche de piston (28).
  4. Procédé de forgeage d'une ébauche de piston (28) selon la revendication 3, caractérisé en ce que l'ébauche estampée (9) se compose d'un alliage d'aluminium et est chauffée à une température de 480°C.
  5. Procédé de forgeage d'une ébauche de piston (28) selon la revendication 4, caractérisé en ce que l'on choisit pour l'ébauche estampée (9) l'alliage AlSi12CuMgNi.
  6. Procédé de forgeage d'une ébauche de piston (28) selon la revendication 4, caractérisé en ce que l'on choisit pour l'ébauche estampée (9) l'alliage AlSi12Cu3Ni2Mg.
EP12791078.4A 2011-10-07 2012-10-05 Dispositif de forgeage pour fabriquer une ébauche de piston et procédé pour fabriquer l'ébauche de piston au moyen du dispositif de forgeage Active EP2763805B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011115048A DE102011115048A1 (de) 2011-10-07 2011-10-07 Schmiedevorrichtung zur Herstellung eines Kolbenrohlings und Verfahren zur Herstellung des Kolbenrohlings unter Verwendung der Schmiedevorrichtung
PCT/DE2012/000969 WO2013050020A1 (fr) 2011-10-07 2012-10-05 Dispositif de forgeage pour fabriquer une ébauche de piston et procédé pour fabriquer l'ébauche de piston au moyen du dispositif de forgeage

Publications (2)

Publication Number Publication Date
EP2763805A1 EP2763805A1 (fr) 2014-08-13
EP2763805B1 true EP2763805B1 (fr) 2016-03-02

Family

ID=47225854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12791078.4A Active EP2763805B1 (fr) 2011-10-07 2012-10-05 Dispositif de forgeage pour fabriquer une ébauche de piston et procédé pour fabriquer l'ébauche de piston au moyen du dispositif de forgeage

Country Status (6)

Country Link
US (1) US9782823B2 (fr)
EP (1) EP2763805B1 (fr)
JP (1) JP5976118B2 (fr)
CN (1) CN104039475B (fr)
DE (1) DE102011115048A1 (fr)
WO (1) WO2013050020A1 (fr)

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US10253722B2 (en) * 2015-05-01 2019-04-09 Ks Kolbenschmidt Us, Inc. Methods for forging a piston blank
US20190022739A1 (en) * 2016-01-22 2019-01-24 Ks Kolbenschmidt Gmbh Piston Having Three Ring Grooves And A Further Groove Having A Joint
DE102018128512A1 (de) 2017-11-14 2019-05-16 Ks Kolbenschmidt Gmbh Stahlkolben mit optimiertem Design
DE102018207874B4 (de) * 2018-05-18 2023-10-26 Federal-Mogul Nürnberg GmbH Verfahren zum multidirektionalen Schmieden eines Kolbens
CN112222342B (zh) * 2020-09-11 2022-07-01 郑州机械研究所有限公司 一种钢制柴油机活塞热挤压成形装置及工艺
CN117340191A (zh) * 2023-06-19 2024-01-05 安徽海立汽车零部件有限公司 一种高压活塞的锻造模具及工艺

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Also Published As

Publication number Publication date
US9782823B2 (en) 2017-10-10
DE102011115048A1 (de) 2013-04-11
CN104039475B (zh) 2016-03-30
EP2763805A1 (fr) 2014-08-13
JP5976118B2 (ja) 2016-08-23
CN104039475A (zh) 2014-09-10
JP2014528357A (ja) 2014-10-27
US20150020566A1 (en) 2015-01-22
WO2013050020A1 (fr) 2013-04-11

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