EP1568423B1 - Procédé de préformage d'une ébauche par des rouleaux - Google Patents

Procédé de préformage d'une ébauche par des rouleaux Download PDF

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Publication number
EP1568423B1
EP1568423B1 EP05003264A EP05003264A EP1568423B1 EP 1568423 B1 EP1568423 B1 EP 1568423B1 EP 05003264 A EP05003264 A EP 05003264A EP 05003264 A EP05003264 A EP 05003264A EP 1568423 B1 EP1568423 B1 EP 1568423B1
Authority
EP
European Patent Office
Prior art keywords
blank
contour
shaping
rollers
preshaping
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.)
Not-in-force
Application number
EP05003264A
Other languages
German (de)
English (en)
Other versions
EP1568423A1 (fr
Inventor
Axel Wittig
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.)
Mueller Weingarten AG
Original Assignee
Mueller Weingarten 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 Mueller Weingarten AG filed Critical Mueller Weingarten AG
Publication of EP1568423A1 publication Critical patent/EP1568423A1/fr
Application granted granted Critical
Publication of EP1568423B1 publication Critical patent/EP1568423B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
    • 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
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/18—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling
    • B21H1/20—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling rolled longitudinally

Definitions

  • the invention relates to a method and a device for preforming a blank in a massive forming process, according to the preamble of claims 1 and 6, respectively.
  • Both the cross rolling and the stretch rolling allow an optimal geometrical adaptation of the mass distribution on the intermediate molding to the requirements of the drop forging of elongated parts.
  • the material surplus in the final shape is thereby minimized and evenly distributed and allows a low-burr drop forging.
  • Relative movements are reduced in the pressure contact zone between the workpiece and engraving and thus reduces the wear of the dies.
  • material consumption can be reduced by up to one-third.
  • Another disadvantage is the complex, constructive design of the preforming device and the associated high costs.
  • the invention has for its object to develop a method and apparatus for preforming a forging, which is inexpensive at a high productivity and can be integrated in the transfer of a forging press.
  • the core idea of the invention is a method in which a stationary blank is deformed by at least one, preferably two, roller continuously moving along a predetermined contour.
  • the feed movement of the contour roller is effected by a linear drive.
  • the path of the contour rollers during the feed is preferably determined by two profile inserts whose profile corresponds to the negative shape of the preform. Due to the feed movement and the shape of the contour rollers, the blank is plastically deformed by the contour of the profile inserts.
  • roll preforming e.g. To obtain a rotationally symmetrical preformed blank, the contour rollers must be performed with the appropriate radius.
  • contour rollers are supported on the blank side facing away from straight plates, which change the distance between the plates to the blank axis by servomotors so that the blank is preformed accordingly.
  • actuators for example servomotors or hydraulic motors can be used.
  • the blank is fixed with a turning pliers. After a forming pass, the turning pliers and thus the partially formed blank are rotated by 90 °. In this position, the rolling process is repeated. As a result, the blank has an approximate rotationally symmetrical intermediate form achieved. It is also conceivable to drive more than two rolling cycles with a correspondingly smaller angle of rotation in order to improve the preforming result. If, for example, the blank consists of a flat bar, a forming pass can of course also result in the required intermediate shape.
  • the blank is held by the turning pliers and supported by, for example, two ejector bolts radially from below. Another function of the turning pliers is to compensate for a lengthening or stretching caused by the preforming.
  • the profile inserts are designed such that the contour rollers move out of the forming area.
  • the ejector bolts now lift the preformed blank onto the workpiece transport plane. This is then gripped by the transfer system of the forging press and is transported through the corresponding forming station.
  • the device according to the invention for this method can be positioned as an independent forming unit or also in the stand area of the forging press. As a result, the device for roll preforming can be inexpensively integrated into the existing press transfer device.
  • the proposed device is placed in front of the forging press with separate feeding device.
  • the proposed preforming method can be used both with and without additional heat treatment.
  • the process is suitable for different materials such as steel or aluminum.
  • the device according to the invention can also be operated several times one above the other. According to the number of devices used, the degree of deformation increases.
  • the application is the same when multiple devices arranged one above the other as when using only one device.
  • a linear force in the direction of the blank axis is necessary.
  • this linear force is generated by a hydraulic drive, but also a power transmission by a mechanical drive is possible.
  • the power transmission from the drive to the contour rollers must be such that they are freely movable in a plane perpendicular to the direction of movement in order to follow the contour of the profile inserts can.
  • This is achieved by a clevis on the two arms are hinged and scissor-shaped.
  • the two contour rollers are rotatably mounted.
  • the arms on which the contour rollers are mounted can additionally be acted upon by a spring force such that the contour rollers rest securely on the contour during retraction and extension.
  • the blank is supported by a stop plate against the feed direction or force.
  • the device according to the invention can be equipped with a guide sleeve, which stabilizes the blank during the forming process. This is achieved by a sleeve which encloses the blank until just before the region of the deformation and taken by the articulated arms in the direction of the blank axis against a spring force becomes. As a result, a bulging or an inclined position of the blank is prevented by the forming.
  • the profile inserts In order to be able to absorb the reaction force of the forming force, the profile inserts must be fixed in a plane perpendicular to the blank axis. This can be done by a mechanical stop, but also other constructive solutions, such as a dimensionally stable frame that surrounds both profile inserts, are possible.
  • the profile inserts, the stop plate and the frame thus form a device, or a tool for roll preforming.
  • This is done by known methods, e.g. clamped with wedges or clamps on a fixed table so that the tool can be changed without great effort.
  • clamped with wedges or clamps on a fixed table so that the tool can be changed without great effort.
  • only an exchange of profile inserts can take place.
  • a mechanical stop in and against the feed direction of the hydraulic cylinder on the fixed table is useful.
  • FIG. 1 shows a device 1 for roll preforming.
  • On the side walls of this frame 4 two profile inserts 6 are attached. These profile inserts have on the side directed towards the middle on a contour that is matched to the final contour of the preformed blank 7.
  • the blank 7 is supported on one side on a stop plate 5, which is also attached to the frame 4. At the other end of the blank of a turning pliers 13 is held.
  • the device 1 for roll preforming is shown in section. To see are ejector pin 12, which supported the blank 7 from below during the preforming process. Between the profile projections 6 and the blank 7 are two contour rollers 8, which are moved by a drive, not shown, for example, a hydraulic cylinder in the direction 9 via a drive linkage 11 on the outer contour of the profile inserts 6 along. The outer contour is thereby pressed into the blank 7 via the contour rollers 8.
  • the profile inserts 6 are performed at the beginning and at the end with a contour 7 removed from the blank, so that the contour rollers 8 move away from the blank 7 at the beginning and at the end of the preforming process.
  • the contour rollers 8 are pressed, for example by a spring force acting on the arms of the drive linkage 11 to the contour of the profile inserts 6.
  • the drive linkage 11 consists essentially of 2 arms, which are mounted in a common pivot point 10.
  • the preforming operation against the direction 9 can be repeated.
  • an approximately rotationally symmetrical preformed blank 7 can be produced.
  • FIGS. 2, 3 and 4 show different preform stages.
  • FIG. 2 shows the beginning of the preforming process.
  • the blank 7 is not yet transformed.
  • the contour rollers 8 are still in the inlet region of the outer contour of the profile inserts. 6
  • the contour rollers 8 have passed approximately half of the forming section, and the resulting proportional deformation of the blank 7 is clearly visible.
  • the contour rollers 8 have already moved out of the region in which a deformation takes place and allow the preformed blank 7 to be lifted by the ejector bolts 12.
  • the invention is not limited to the illustrated and described embodiment. It also includes all professional training that fall under the wording of the claims.

Landscapes

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

Claims (17)

  1. Procédé de fabrication d'une pièce à remodeler à partir d'une ébauche (7) pour un remodelage massif ultérieur, selon lequel on déforme l'ébauche (7) plastiquement en effectuant le remodelage plastique de l'ébauche fixe progressivement en continu,
    caractérisé en ce que
    des cylindres de contour (8) portées par des tiges d'entraînement (11) s'appuient sur des inserts de profilage (6) d'un contour quelconque pour conférer une forme correspondante à l'ébauche (7), et après la rotation autour de l'axe longitudinal de l'ébauche (7) le procédé de préformage peut être répété à souhait en augmentant le degré de remodelage.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    l'ébauche peut être chauffée avant le procédé de préformage.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que
    la pièce préformée est amenée de façon entièrement automatique au processus de forgeage après l'opération de remodelage sans autre traitement thermique.
  4. Procédé selon la revendication 1, 2 ou 3,
    caractérisé en ce que
    l'ébauche peut présenter une section transversale quelconque.
  5. Procédé selon l'une quelconque des revendications précédentes 1 à 4,
    caractérisé en ce qu'
    on augmente le degré de remodelage par plusieurs opérations de remodelage sans changer la position de l'ébauche.
  6. Dispositif pour la mise en oeuvre du procédé selon la revendication 1 pour le préformage d'une ébauche (7), dans lequel l'ébauche (7) fixe en position est remodelée dans les directions longitudinale et transversale par au moins un cylindre de contour (8) mobile, la course du cylindre de contour (8) pouvant être déterminée par le contour extérieur d'un insert de profilage (6) fixe et le contour extérieur de l'insert de profilage (6) correspondant à la géométrie projetée de la pièce préformée,
    caractérisé en ce qu'
    au moins deux cylindres de contour (8) sont logés en rotation sur des bras (11) en forme de fourches ou de ciseaux reliés pour leur part à l'entraînement linéaire dans un point de rotation (10) commun.
  7. Dispositif selon la revendication 6,
    caractérisé en ce que
    le cylindre de contour (8) peut être déplacé au moyen d'un entraînement linéaire dans la direction de l'axe longitudinal de l'ébauche.
  8. Dispositif selon la revendication 7 ou 6,
    caractérisé en ce que
    la distance du cylindre de contour (8) par rapport à l'axe de l'ébauche peut être influencée pendant le remodelage par des servomoteurs.
  9. Dispositif selon la revendication 8,
    caractérisé en ce que
    les servomoteurs agissent sur des plaques planes sur lesquelles s'appuient les cylindres de contour pendant le remodelage.
  10. Dispositif selon la revendication 6,
    caractérisé en ce que
    les deux bras (11) sont en relation active avec un ressort dont la force élastique pousse les bras (11) contre les inserts de profilage (6).
  11. Dispositif selon l'une quelconque des revendications 6 à 10,
    caractérisé en ce que
    l'entraînement linéaire est un vérin hydraulique ou un mécanisme à leviers.
  12. Dispositif selon l'une quelconque des revendications 6 à 11,
    caractérisé en ce que
    pendant le processus de remodelage, l'ébauche (7) est appuyée sur une plaque de butée (5) par l'avancement des cylindres de contour (8).
  13. Dispositif selon les revendications 6 à 12,
    caractérisé en ce que
    pendant le remodelage l'ébauche (7) est guidée par une douille qui peut être déplacée en direction de l'axe de l'ébauche conjointement avec les cylindres de contour (8).
  14. Dispositif selon les revendications 6 à 13,
    caractérisé en ce que
    les inserts de profilage (6) et la plaque de butée (5) sont entourés par un cadre fermé (4).
  15. Dispositif selon l'une quelconque des revendications 6 à 14,
    caractérisé en ce qu'
    avant et après le préformage, l'ébauche (7) peut être soutenue et soulevée par des supports (12) en forme d'éjecteurs.
  16. Dispositif selon l'une quelconque des revendications 6 à 15,
    caractérisé en ce que
    l'ébauche (7) est tenue dans une pince pivotante (13) rotative dans l'axe longitudinal de l'ébauche.
  17. Dispositif selon l'une quelconque des revendications 6 à 16,
    caractérisé en ce que
    plusieurs dispositifs de préformage (1) peuvent être entraînés par un entraînement linéaire commun.
EP05003264A 2004-02-20 2005-02-16 Procédé de préformage d'une ébauche par des rouleaux Not-in-force EP1568423B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004008800A DE102004008800A1 (de) 2004-02-20 2004-02-20 Verfahren und Vorrichtung zum Vorformen eines Rohlings in einem Massivumformprozess
DE102004008800 2004-02-20

Publications (2)

Publication Number Publication Date
EP1568423A1 EP1568423A1 (fr) 2005-08-31
EP1568423B1 true EP1568423B1 (fr) 2007-04-25

Family

ID=34745254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05003264A Not-in-force EP1568423B1 (fr) 2004-02-20 2005-02-16 Procédé de préformage d'une ébauche par des rouleaux

Country Status (4)

Country Link
US (1) US7237417B2 (fr)
EP (1) EP1568423B1 (fr)
DE (3) DE102004008800A1 (fr)
ES (1) ES2285585T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9566638B2 (en) 2013-12-18 2017-02-14 United Technologies Corporation Deep rolling tool with force adjustment
US9421602B2 (en) * 2013-12-18 2016-08-23 United Technologies Corporation Machine for deep rolling tool positioning
US9573175B2 (en) 2013-12-18 2017-02-21 United Technologies Corporation Deep rolling tool for blade fatigue life enhancement
US9573184B2 (en) 2013-12-18 2017-02-21 United Technologies Corporation Deep rolling tool for processing blade root
WO2015105655A1 (fr) * 2014-01-07 2015-07-16 United Technologies Corporation Systèmes et procédés de détermination de trajectoire d'outil pour le durcissement par écrouissage superficiel automatisé à fourche souple
CN106694561A (zh) * 2016-12-19 2017-05-24 苏州唐氏机械制造有限公司 可控压辊机构
CN112792220B (zh) * 2020-12-18 2022-12-09 珠海格力智能装备有限公司 整形设备

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US189201A (en) * 1877-04-03 Improvement in machines for rolling blanks for sucker-rod joints
US1013429A (en) * 1910-03-26 1912-01-02 Adolf Alexander Karl Nowak Rolling-mill.
US2202016A (en) * 1938-05-23 1940-05-28 Pittsburgh Forging Co Manufacture of metal articles
US2432566A (en) * 1944-09-08 1947-12-16 Nat Tube Co Tapering metal tubes
US3199327A (en) * 1961-05-17 1965-08-10 Rockwell Standard Co Machine for making single leaf springs and the like
US3338081A (en) * 1963-07-29 1967-08-29 Eumuco Ag Fur Maschb Automatic feed for forging roll sets
US3505849A (en) * 1966-10-01 1970-04-14 Schloemann Ag Roll stand for a rolling mill
US4109358A (en) * 1971-04-21 1978-08-29 Esb Ray-O-Vac Management Corporation Method for making storage battery grid from lead-tin-zinc alloy
DE2418526A1 (de) * 1973-05-10 1974-11-28 Josef Froehling Zycloidwalzwerk
DE2424587C3 (de) * 1974-05-21 1980-03-20 Eisenwerk-Gesellschaft Maximilianshuette Mbh, 8458 Sulzbach-Rosenberg Walzvorrichtung
GB2069883A (en) * 1980-02-26 1981-09-03 Proizv Obiedine Method for manufacturing profiled beams from slabs of rectangular cross section
FR2750351B1 (fr) * 1996-06-27 1998-08-07 Lorraine Laminage Procede et dispositif de calibrage en largeur d'un demi-produit siderurgique tel qu'une brame d'acier
DE10048312B4 (de) * 2000-09-29 2004-07-29 Benteler Ag Abstreckvorrichtung
AUPR871801A0 (en) * 2001-11-07 2001-11-29 Bishop Manufacturing Technology Limited Apparatus and method for manufacture of longitudinal component with mass accumulations

Also Published As

Publication number Publication date
EP1568423A1 (fr) 2005-08-31
US20050183485A1 (en) 2005-08-25
ES2285585T3 (es) 2007-11-16
DE102005007712A1 (de) 2005-09-08
DE102004008800A1 (de) 2005-09-29
US7237417B2 (en) 2007-07-03
DE502005000611D1 (de) 2007-06-06

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