EP1689542A2 - Procede de forge et d'estampage, et dispositif d'estampage pour la mise en oeuvre de ce procede - Google Patents

Procede de forge et d'estampage, et dispositif d'estampage pour la mise en oeuvre de ce procede

Info

Publication number
EP1689542A2
EP1689542A2 EP04819698A EP04819698A EP1689542A2 EP 1689542 A2 EP1689542 A2 EP 1689542A2 EP 04819698 A EP04819698 A EP 04819698A EP 04819698 A EP04819698 A EP 04819698A EP 1689542 A2 EP1689542 A2 EP 1689542A2
Authority
EP
European Patent Office
Prior art keywords
forging
engraving
die
engravings
parts
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.)
Withdrawn
Application number
EP04819698A
Other languages
German (de)
English (en)
Inventor
Wolfgang Lorbach
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.)
Knipex Werk C Gustav Putsch KG
Original Assignee
Knipex Werk C Gustav Putsch KG
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
Priority claimed from DE102004028378A external-priority patent/DE102004028378B4/de
Application filed by Knipex Werk C Gustav Putsch KG filed Critical Knipex Werk C Gustav Putsch KG
Publication of EP1689542A2 publication Critical patent/EP1689542A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/022—Special design or construction multi-stage forging presses
    • 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
    • B21J13/08—Accessories for handling work or tools

Definitions

  • the invention relates to a method for die forging, with a forging device having a bear and a die, a part lying in the die being formed by a hammer blow, a plurality of engravings being further formed in the die and a blank initially being inserted into a first engraving and then successively further engravings are carried out to a final engraving, and the part is further gripped by a forging gripper during the forming.
  • forging presses In addition to the forging devices designed as a hammer, forging presses are known in which the compressive forces are transmitted by means of a path-controlled press ram. This enables good forging results to be achieved with relatively high investment costs. In addition, not achieve as many cycle times per unit of time as with a forging hammer.
  • DE 3129482 C2 discloses a forging press with a plurality of engravings formed side by side in the direction of enforcement.
  • the workpieces are transported automatically, but after a workpiece has been placed in an engraving, the transport device is withdrawn while the forging process is being carried out, that is to say it is separated from the tool.
  • a comparable method and a comparable forging press are known from DE 19958846 AI.
  • it is also known from DE 3323359 C2 to automatically handle forgings in a forging process.
  • the forging of an auxiliary body is proposed here, which can be used to grip transport tongs and to position a forged part in an engraving in a precise position.
  • the invention is initially concerned with the task of specifying a method for die forging with a forging device having a bear and a die, which uses one of the generally cheaper system costs and high achievable cycle rates Device nevertheless enables a high degree of automation without having to accept disadvantages in the forging quality customary for such devices.
  • the invention is also concerned with the task of specifying a device for drop forging, with a bear and a die, which, using the low investment costs of such a device, enables forging with a high degree of automation and high achievable levels Cycle counts made possible without having to accept disadvantages in terms of quality.
  • the above-mentioned object is achieved first and for the most part in the subject matter of claim 1, with the aim being that a part of each engraving is recorded in a plurality of engravings, with a symmetrical distribution with regard to loading the bear between engraved and unassigned engravings, which parts are gripped by the forging gripper during the forming process, and after each hammer blow, the parts are successively transferred to another
  • Engraving is carried out by removing a part from the final engraving or the last engraving occupied by a part before the final engraving, and inserting the blank into the first engraving to be documented. It is preferred that with each hammer blow a part is picked up in each engraving, which is gripped by the forging gripper during the shaping and after each hammer blow is successively placed in the engraving adjacent to the final engraving. One part is then removed from the final engraving and another part is inserted into the first engraving.
  • the method described is preferably suitable for forging parts such as pliers halves. Basically, it is also suitable for other forgings. Especially for parts that have a greater length than the width. For example, parts such as connecting rods or camshafts may also be involved.
  • the method is carried out on a forging device which has two guide columns and forms a two-column design, there is the possibility that the parts picked up by the engravings are arranged next to one another in a connecting line of the guide columns and are successively offset on this connecting line. Then the die is oriented in the same way as in known, commonly used processes. However, in contrast, it is ensured in the method according to the invention that in the hammer blow, a large number of engravings, in view of the stress on the bear, are documented symmetrically, and not just one as in the prior art.
  • a cheap alternative according to the invention consists in designing the method in such a way that the parts to be forged or "piller" run as short as possible and can be deposited at the end of the forging process without changing the position.
  • the engravings are arranged side by side in a connecting line of the row of guide columns, and the parts are successively moved in the direction of this side-by-side arrangement.
  • the parts themselves are in the connecting line or parallel to it. In detail, this means that the parts removed from the final engraving and / or the parts inserted into the first engraving are in one towards and / or listed in the direction parallel to the enforcement.
  • the parts that are fed in and / or discharged are tempered on the transport device that directly reaches the forging device by means of a heating system assigned to it.
  • the forged parts are thus brought to the required temperature which is necessary for machining the parts.
  • the parts are in any case transported in the die from engraving to engraving by simultaneous lifting and depositing at their opposite end regions. For example, this can be done by means of a crank lifter from
  • the end areas serve to attack the parts.
  • the part is accessed from below. Trouble-free execution of the process results from the fact that the transport rhythm of the parts is synchronized with the forging frequency.
  • the method according to the invention then allows the same part to be forged two or more times in an engraving of the same shape, these engravings being separate from one another and being successively interspersed in the direction of enforcement. The same and not the same engravings are provided in an irregular sequence.
  • the forging device can maintain the tried and tested structure.
  • the guides evenly loaded.
  • the die can form at least two engravings of the same shape next to one another.
  • the die, which has the engravings in a juxtaposition can have a different orientation to the connecting line of the guide columns. There are two options in particular. One possibility is that the engravings are arranged next to one another in a connecting line of the guide columns.
  • the engravings can also be arranged in a row next to one another transversely to the connecting line of the guide columns.
  • An advantageous embodiment is characterized by providing a transport device for the parts to be inserted into the first engraving and / or to be removed from the final engraving, with a parallel transport direction to the direction of enforcement. This orientation allows the transport device for supplying and / or removing the parts to reach the forging device directly and the transport device in the supply and / or discharge area has a heating system for tempering the parts.
  • the die has a conveying device for lifting, conveying and depositing the parts from engraving to engraving by attacking opposite end regions of the parts. This conveyor is tailored to the working method of the bear, so that a transport rhythm of the parts synchronized with the forging frequency can be achieved.
  • the forging and / or transport grippers are arranged outside a base area of the die. Both the die and the forging and / or transport grippers are independent units, so that each can be optimally designed.
  • the use of a forging hammer compared to a forging press has the advantage of an inexpensive construction of the forging device.
  • the use of a drop hammer as a hammer is particularly recommended. This means that when the bear moves on the forging, the acceleration due to gravity acts while the lifting takes place by means of a lifting device.
  • the hammer can be a counterblow hammer.
  • the counterblow hammers can even simplify the gripping and conveying device because they offer more space. Such counterblow hammers are particularly advantageous for forging crankshafts.
  • the forged part is constantly gripped during forging, be it by the forging gripper or the transport gripper. If this is done by the transport gripper, it even fulfills a double function.
  • the guide columns have a recess facing the die at the level of the lower die for receiving the forging and / or transport grippers.
  • the grippers are designed in such a way that the geometry of the gripping ends or their orientation, which changes during a forging blow, can be taken into account. You can do this the forged grippers have, for example, articulated gripping heads or resilient gripping heads. To a certain extent slipping of the piller in the grasping can be tolerated.
  • the forging and / or transport gripping he can be hammer-resistant. Because of this, it is advantageous that the forging and / or transport grippers take part in the movement of the forging hammer with each forging stroke.
  • FIG. 1 shows a view of a forging device according to the first embodiment for carrying out the method
  • Fig. 2 shows a schematic representation of a section along the line LT - LT in ig. l;
  • FIG. 3 shows a schematic illustration of the lower die in a front view
  • FIG. 4 shows the view according to arrow direction IV in FIG. 3;
  • FIG. 5 shows a schematic plan view illustration of a forging device according to the second embodiment
  • FIG. 6 shows a longitudinal section through an engraving of a die with a modified conveyor device operating according to a double-pincer principle with the part still lying in the engraving;
  • FIG. 7 shows a follow-up view of FIG. 6, the part being lifted out of the engraving by means of the transport tongs and the gripping tongs being in their release position;
  • FIG. 8 is a view comparable to FIG. 1 of the forging device according to the third embodiment.
  • Fig. 9 shows a cross section through the forging device above the lower die
  • Fig. 10 is a cross-sectional view in the area of the transport and forging grippers in the plant division.
  • the forging device for carrying out the method is designated by the number 1.
  • the forging device 1 has two guide columns 2, 3 arranged parallel to one another. The latter assume a scabbard or a base plate 4, which in turn is supported on a foundation 6 via an intermediate layer 5.
  • the guide columns 2, 3 accommodate between them a bear 7 which can be displaced in the vertical direction and on which a drive 8 engages.
  • the base plate 4 carries a lower die 9, which can be fastened there by means not shown.
  • the bear 7 is equipped on its underside with an upper die 10.
  • the die 9 has a rectangular outline and forms a plurality of engravings a, b, c, d and e in a juxtaposition on its upper side.
  • the engraving a it is the first engraving and with respect to the engraving e, it is the final engraving.
  • the engravings a to e serve to accommodate parts to be reshaped T.
  • the direction of penetration x of the parts inserted into the engravings a to e runs transversely to the connecting line of the guide columns 2, 3.
  • Such a juxtaposition of the engravings a to e is provided that these in usually have the same distance from each other.
  • the counter-engravings of the upper die which interact with the engravings a to e (these are not shown), lead to a reshaping of the parts T inserted in the engravings a to e.
  • a blank R is inserted into the first engraving a when the forging device 1 is in operation. After inserting it into the first engraving a, this thus represents a part T to be deformed.
  • the transport device 11 extends up to the side of the die 9 which forms the first engraving a.
  • the transport device 12 is adjacent to the final engraving e.
  • the finished forged parts are requested on this. This means that the parts inserted into the first engraving a and the parts removed from the final engraving e are fed in and out in a direction parallel to the direction of penetration x of the die 9.
  • the forged parts could also be removed using a differently designed transport device. It can be seen from FIG. 2 that the transport device 11 directly reaching the forging device 1 is associated with a heating system 13 indicated by dash-dotted lines. This ensures that the blanks are always inserted into the engraving a at the correct temperature. The use of a heating system would also be possible on the transport device 12 in order to temper the finished forged parts for any further processing.
  • the parts inserted into the engravings a to e, starting from the first engraving a, are continuously brought into a final shape in the engraving e.
  • the engravings a to e are designed such that pliers halves can be forged in them, as are used in water pump pliers.
  • the engravings b and c can be of identical shape, so that the same part T is forged twice in an identical engraving. As can be seen from the drawing, these two engravings b and c are successively interspersed in the direction of enforcement.
  • Each long side is assigned a conveyor 14. Their structure is identical, so that only one is explained below.
  • Each conveyor device 14 has two crank arms 15 mounted on the articulated side with axes of rotation 16 aligned parallel to the engravings a to e.
  • One crank arm 15 is adjacent to the first engraving a and the other to the final engraving e.
  • Crank pins 17 provided on the crank arms 15 support links 18, which in turn are fixed with their link ends 19 to a conveyor rod 20 guided in the longitudinal direction outside the die 9.
  • two conveyor bars 20 are provided which move close to the long sides of the die 9.
  • a turning station S is assigned to the transport device 11, which in accordance with the forging frequency rotates the corresponding blank R by 90 ° and allows it to be inserted into the first engraving a ,
  • a heating system 13 is provided, by means of which the blanks fed to the forging device 1 are brought to the prescribed temperature.
  • Also shown in this version is a transport device 12 for transporting away the forged parts.
  • FIGS. 6 and 7 relate to a modified conveying device 22 associated with the die 9.
  • the conveyor 22 works in detail as follows:
  • the gripping tongs 25, 26 grip the end 35 of a part T lying in an engraving, while the transport tongs 23, 24 of solved the end 35 and are at a distance from this, cf. Fig. 6.
  • the forging tongs 25, 26 open.
  • the forging tongs 23, 24 come into abutment with the end 35, so that the part T which has been lifted out of the engraving can then be inserted into an adjacent engraving by means of the transport tongs 23, 24 carrying out a conveying movement , During the opening of the transport tongs 23, 24, the forging tongs 25, 26 then come into contact with the end 35.
  • forged grippers 28 and transport grippers 29 forming a conveying device 22 are now provided on both sides of the lower die 9. Furthermore, the guide columns 2, 3 at the level of the lower die 9 have a recess 30 facing them for receiving the forging and transport grippers 28, 29.
  • the latter are designed to be hammer-resistant and therefore make the movement of the forging device 1 in the form of a forging hammer with each forging stroke.
  • the hammer is a monkey.
  • the longitudinal extent of the engravings a to e extends transversely to the long sides of the die 9. Each long side is assigned two transport beams 31, 32 arranged one above the other, which in turn are carriers of the transport grippers 29.
  • the transport bars 31, 32 are controlled so that they can perform a longitudinal movement in the direction of the passage of the parts. Furthermore, the transport bars 31, 32 can be moved towards one another. Both the lower and the upper dies 9, 10 are equipped with five engravings a, b, c, d and e lying one behind the other. DEM opposite, six transport grippers 29 each start from the transport bars 31, 32. The distance between the transport grippers 29 corresponds to the distance between the engravings. It is therefore possible for the grippers 29 assigned to the feeding transport path 11 to be able to pick up a part arriving there.
  • the lower transport grippers 29 are supports of brackets 33. Each bracket 33 is supported on the transport bar 32 by a compression spring 34.
  • the spring travel of the lower grippers 29 is designed such that a small upward stroke can be carried out from the contact position at the ends 35 of the parts T, which ends 35 serve as gripping ends, with a certain clamping effect.
  • each forged gripper 28 can be displaced in the double arrow direction according to FIG. 10 and accordingly can be brought into contact position with the gripping ends 35 of the parts.
  • each gripper 28 can perform a rotary movement about a vertical axis 36.
  • the contact surfaces 37 acting on the gripping ends 35 run parallel to one another and are smooth.
  • the transport rhythm of the parts T is synchronized with the forging frequency.
  • the forging grippers 28 are also controlled, which come from a release position — shown in broken lines — into a contact position with the gripping ends 35. Once this has been done, the hammer blow is caused by the bear 7 being moved downwards, cf. Fig. 10 performed. This means that the forging T is constantly gripped during the forging and is accordingly in a controlled position. During this process, the transport grippers 29 can also abut the gripping ends 35 remain. However, it would also be possible for the transport grippers 29 to be at a distance from the gripping ends 35 during forging.
  • the ends of the piller or of the parts T have a lateral projection over the die 9.
  • the protrusions form the aforementioned gripping ends 35.
  • the parts or piller can be designed as round material. However, it is also possible to use flat material, for example. Then a certain mass distribution with respect to the piller can also be provided, that is to say a pre-deformation thereof.
  • the forged grippers 28 can pivot about the vertical axis 36 during the described process in order to obtain an adjustment with respect to the orientation of the gripping ends. In the release position of the forged grippers 28, these then return to their starting position.

Landscapes

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

Abstract

L'invention concerne un procédé d'estampage au moyen d'une dispositif d'estampage (1) présentant un mouton et une matrice d'estampage (9), procédé dans lequel une pièce (T) positionnée dans la matrice (9) est déformée par la frappe du mouton, plusieurs gravures (a, b, c, d, e) étant formées dans la matrice (9), et une pièce brute à forger (R) est insérée, en premier lieu, dans une première gravure (a) et se déplace ensuite sur les autres gravures (b, c, d), jusqu'à une gravure finale (e), la pièce (T) étant ensuite saisie, pendant la déformation, par une pince de forgeage. En vue d'obtenir un mode de fonctionnement optimal, l'invention est caractérisée en ce que pour chaque frappe dans un ensemble de gravures (a, b, c, d), une pièce (T) est recueillie, et en ce qu'en vue d'obtenir une répartition symétrique de charge du mouton entre les gravures garnies et non garnies, les pièces (T) sont saisies respectivement, durant la déformation, par les pinces de forgeage, et en ce qu'après chaque frappe du mouton, un déplacement successif des pièces (T) s'effectue dans une autre gravure, avec retrait d'une pièce (T) de la gravure finale (e), ou de la dernière, avant la gravure finale (e), par une pièce garnissant la gravure, et insertion de la pièce brute à forger (R) dans la première gravure à garnir (a).
EP04819698A 2003-12-01 2004-12-01 Procede de forge et d'estampage, et dispositif d'estampage pour la mise en oeuvre de ce procede Withdrawn EP1689542A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10356258 2003-12-01
DE102004028378A DE102004028378B4 (de) 2003-12-01 2004-06-11 Verfahren zum Gesenkschmieden und Schmiedevorrichtung zur Durchführung des Verfahrens
PCT/EP2004/053189 WO2005053874A2 (fr) 2003-12-01 2004-12-01 Procede de forge et d'estampage, et dispositif d'estampage pour la mise en oeuvre de ce procede

Publications (1)

Publication Number Publication Date
EP1689542A2 true EP1689542A2 (fr) 2006-08-16

Family

ID=34654841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04819698A Withdrawn EP1689542A2 (fr) 2003-12-01 2004-12-01 Procede de forge et d'estampage, et dispositif d'estampage pour la mise en oeuvre de ce procede

Country Status (4)

Country Link
US (1) US8113029B2 (fr)
EP (1) EP1689542A2 (fr)
RU (1) RU2374024C2 (fr)
WO (1) WO2005053874A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2917653B1 (fr) * 2007-06-25 2009-10-16 Snecma Sa Outillage pour le matricage au pilon
JP5769859B1 (ja) 2014-11-03 2015-08-26 日本エアロフォージ株式会社 液圧鍛造プレス装置及びその制御方法
EP3299096B1 (fr) * 2015-05-19 2019-09-25 Nippon Steel Corporation Dispositif et procédé de fabrication d'un vilebrequin forgé
CN105149485B (zh) * 2015-08-24 2017-01-18 西安交通大学 多个交流伺服电机驱动型皮带强制回程的机械式对击气锤

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5586637A (en) * 1978-12-25 1980-06-30 Komatsu Ltd Continuous hot forging method

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US1996819A (en) * 1932-05-11 1935-04-09 Gen Motors Corp Automatic forging or pressure machine
US3713320A (en) * 1971-05-28 1973-01-30 Walker Forge Inc Method of handling metal stock for hot forging
US3772906A (en) * 1972-09-11 1973-11-20 R Dorton Impression die forging method and apparatus
AT348846B (de) 1977-09-26 1979-03-12 Wefoba Verfahren zur automatischen herstellung von gesenkschmiedeteilen ausgehend von spaltstuecken und vorrichtung zu seiner durchfuehrung
DE3129482A1 (de) * 1981-07-25 1983-02-10 Eumuco Aktiengesellschaft für Maschinenbau, 5090 Leverkusen Verfahren und vorrichtung zum durchfuehren des selbsttaetigen werkstuecktransportes bei gesenkschmiedepressen und dergleichen
EP0115602A1 (fr) * 1983-01-06 1984-08-15 Hämmerle AG Dispositif pour manipuler des pièces à usiner
DE3323359C2 (de) 1983-06-29 1986-11-20 Belzer-Dowidat Gmbh Werkzeug-Union, 5600 Wuppertal Verfahren zum Herstellen von Schmiedeteilen mit Hilfskörpern zur automatisierten Handhabung der Schmiedeteile
CH666635A5 (de) * 1984-04-21 1988-08-15 Eumuco Ag Fuer Maschinenbau Verfahren und vorrichtung zum formen von werkstuecken durch gesenkschmieden.
JPH01258838A (ja) * 1988-04-05 1989-10-16 Sumitomo Metal Ind Ltd 鍛造方法
DE19958846B4 (de) * 1999-12-07 2008-07-24 Sms Eumuco Gmbh Verfahren zum Herstellen von länglichen Gesenkschmiedestücken
DE20311306U1 (de) * 2003-06-06 2003-10-02 Langenstein & Schemann Gmbh Vorrichtung zum Umformen eines Werkstücks mit automatischer Handhabung
WO2004108323A1 (fr) * 2003-06-06 2004-12-16 Langenstein & Schemann Gmbh Procede et dispositif pour façonner une piece par manipulation automatique
DE10336469B4 (de) * 2003-08-08 2006-06-29 Langenstein & Schemann Gmbh Verfahren und Vorrichtung zum Umformen eines Werkstücks mit anschließendem Anheben des Werkstücks

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Publication number Priority date Publication date Assignee Title
JPS5586637A (en) * 1978-12-25 1980-06-30 Komatsu Ltd Continuous hot forging method

Also Published As

Publication number Publication date
WO2005053874A2 (fr) 2005-06-16
WO2005053874A3 (fr) 2005-10-13
US20060266093A1 (en) 2006-11-30
US8113029B2 (en) 2012-02-14
RU2006123440A (ru) 2008-01-10
RU2374024C2 (ru) 2009-11-27

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