EP0566818B1 - Machine de forgeage pour fabriquer des ébauches en forme de barre ou similaires - Google Patents

Machine de forgeage pour fabriquer des ébauches en forme de barre ou similaires Download PDF

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Publication number
EP0566818B1
EP0566818B1 EP92890098A EP92890098A EP0566818B1 EP 0566818 B1 EP0566818 B1 EP 0566818B1 EP 92890098 A EP92890098 A EP 92890098A EP 92890098 A EP92890098 A EP 92890098A EP 0566818 B1 EP0566818 B1 EP 0566818B1
Authority
EP
European Patent Office
Prior art keywords
forging
workpiece
tools
rolling
unit
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
EP92890098A
Other languages
German (de)
English (en)
Other versions
EP0566818A1 (fr
Inventor
Otto Ing. Hein
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.)
GFM Holding AG
Original Assignee
GFM Gesellschaft fuer Fertigungstechnik und Maschinenbau 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 GFM Gesellschaft fuer Fertigungstechnik und Maschinenbau AG filed Critical GFM Gesellschaft fuer Fertigungstechnik und Maschinenbau AG
Priority to DE59206572T priority Critical patent/DE59206572D1/de
Priority to EP92890098A priority patent/EP0566818B1/fr
Priority to AT92890098T priority patent/ATE139157T1/de
Publication of EP0566818A1 publication Critical patent/EP0566818A1/fr
Application granted granted Critical
Publication of EP0566818B1 publication Critical patent/EP0566818B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/02—Special design or construction
    • B21J7/14—Forging machines working with several hammers
    • B21J7/145—Forging machines working with several hammers the hammers being driven by a rotating annular driving member

Definitions

  • the invention relates to a forging rolling mill for producing rod-shaped workpieces or the like, in particular from higher-alloy steels, with a forging unit which has forging tools acting radially on the workpiece guided longitudinally over workpiece guides, and a rolling mill comprising at least two roll stands downstream of the forging unit. an intermediate storage point for the forged workpiece with a length adapted to this is provided between the forging unit and the rolling mill.
  • the forging units In most forging and rolling systems, the forging units have so far been placed directly upstream of the rolling mill and the forged workpiece immediately arrives in the rolling stands, so that on the one hand forging must be carried out with a straight feed and on the other hand the rolling speed must be adapted very precisely to the forging process.
  • the continuous forging of non-turned workpieces inevitably results in zones of increased material stress in the overlap area of the forging tools, which in turn cause material overheating, especially in the case of critical, high-alloy steels, and a rolling speed which is directly dependent on the forging process reduces the adaptability of the rolling process to the requirements of the material, particularly with regard to it of temperatures.
  • a hot rolling device is also known from EP-A 0 368 333, in which the roll stands merely involve the rolling of two opposite cross-sectional sides and an upstream forging device, as a calibration device, processes the side faces of the cross section perpendicular to the rolling planes.
  • an upstream forging device as a calibration device, processes the side faces of the cross section perpendicular to the rolling planes.
  • a roller table or the like conveyor In the transition area between the forging device and the rolling stands there is a roller table or the like conveyor, to which a heating furnace can be assigned.
  • This forging mill therefore only enables calibrating forging in the course of sheet metal production and is also not able to rotate the workpiece for proper forging for bar steel production.
  • the invention is therefore based on the object of eliminating these deficiencies and of creating a forging mill of the type described at the outset, which in a rational manner is a powerful and high-quality rod material production guaranteed even when processing high-alloy steels.
  • the invention solves this problem in that the workpiece guides consist of two reciprocating and rotatable chuck receptacles that can be moved back and forth on both sides of the forging assembly for a rotational and longitudinal feed of the workpiece, that the intermediate-position clamping head has a workpiece lead-through for axial workpiece removal and that Intermediate storage place a drivable pull-off roller pair upstream and preferably a driver combined with a cropping shear.
  • the intermediate storage point avoids an immediate transition of the workpiece from the forging unit to the rolling mill, so that it is possible to rotate the workpiece with the clamping heads during forging and then to feed a non-rotating workpiece to the rolling mill.
  • the two clamping heads ensure the precise workpiece guidance and feed movements required for low-tolerance forging, whereby the rolling mill and forging unit can work independently of one another in terms of optimal use.
  • the workpieces or the like can be changed without changing direction and without additional transfer devices. lead through the system quickly and in a straight line, which can reduce the overall construction and construction effort and also shorten the intermediate times between the forging and rolling for the workpiece and thus lower heat losses.
  • the removal roller pair and preferably the driver are provided in order to be able to quickly transfer the forged workpiece after the axial removal through the workpiece lead-through of the clamping head to the intermediate storage location and then to properly deliver the workpiece from the intermediate storage location to the rolling mill.
  • the rotary drive for the workpiece is also missing and the pull-off roller pair conveys the workpiece completely to the intermediate storage location without further rotation. From here, the driver takes over the workpiece and ensures the required piercing speed, with cropping scissors trimming the workpiece at the end and creating perfect piercing conditions.
  • the intermediate storage point is equipped with a warming and / or heating device, excessive cooling of the forged workpiece in the area of the intermediate storage point is prevented with little effort and the workpiece can pierce immediately with the desired rolling temperature in the subsequent rolling mill.
  • a simple covering hood is usually sufficient as a warming device and an additional heating device is only required in special cases.
  • the forging unit has forging tools working in two forging levels one behind the other, it can be forged in two passes at the same time during a workpiece pass and not only a correspondingly large reduction in cross-section is achieved, but also a forging output adapted to the rolling capacity of the subsequent rolling mill is possible.
  • a compact, high-performance design of the forging unit results if the forging tools of two forging levels are arranged in a common forging box, the forging tools of both forging levels being seated on a common eccentric shaft.
  • the same drive and control devices can be used for both forging levels, which ensures exact, trouble-free forging operation even with high reduction work.
  • a forging mill 1 for producing rod-shaped workpieces is composed of a forging unit 2 for continuous forging of the starting workpiece and a subsequent rolling mill 3 for finish rolling the forged workpiece to the desired rod material.
  • the forging unit 2 is forged to achieve a high cross-sectional reduction in two successive forging levels and the rolling mill 3 comprises a plurality of roll stands 4 forming a continuous rolling train.
  • the rolling mill 3 can be converted in the usual way to carry out different rolling programs and equipped with suitable cutting devices 5, 6 his.
  • the intermediate storage point 7 for the forged workpiece which is designed as a roller table with an overall length adapted to the length of the forged workpieces.
  • the intermediate storage location 7 has a cover as a warming device 8.
  • the intermediate storage point 7 Because of the intermediate storage point 7, it is possible to provide a short machining break between the forging and the rolling process, so that the workpiece can first be completely forged before it pierces in the rolling mill 3. As a result, the forging can be carried out with the workpiece rotating and a uniform, thorough forging effect can be achieved, and moreover the subsequent rolling process can be carried out with the workpiece not rotating at an optimum rolling speed which is independent of the forging speed.
  • the forging unit 2 works with two clamping heads 9, 10, which are arranged on both sides of the forging unit and can be moved back and forth, the chucks 11, 12 of which are rotatably and driveably mounted, as a result of which the workpiece can be subjected to a longitudinal and rotary feed with exact guidance. Since the rolling mill 3, intermediate storage point 7 and forging unit 2 are expediently lined up axially one behind the other, the clamping head 9 on the intermediate bearing point has a workpiece leadthrough 13 for the axial removal of the workpiece from the forging unit 2.
  • the withdrawn workpiece is taken over a take-off roller pair 14 arranged upstream of the intermediate storage location 7 and transferred to the intermediate storage location 7, from where it is then fed to the rolling mill 3 on the rolling mill side via a driver 16 combined with a cropping shear 15.
  • the forging assembly has 2 eccentrically driven forging tools 17, 18 which, in two forging levels I, II, radially clamped and guided in the chucks 11, 12 of the clamping heads 9, 10 Workpieces W act so that forging in two passes can be achieved simultaneously in a single pass with a correspondingly high reduction in cross-section.
  • For the forging tools 17, 18 there is a common forging box 19 in which the forging rods 20, 21 carrying the forging tools sit on eccentric shafts 22, the forged connecting rods 20, 21 of the forging levels I, II arranged one behind the other each on eccentrics 23, 24 of a common eccentric shaft 22 are stored, so that a compact construction is created and the drive and control effort remains relatively low.
  • the common eccentric drive synchronizes the forging tools 17, 18 so that the forging tools 17, 18 work with a coordinated stroke sequence and the same number of strokes, the stroke position of the forged connecting rods 20, 21 and thus the forging tools 17, 18 using suitable adjusting devices 25 can be changed and adapted to the respective forging program. It is useful if the forging tools 18 of the forging level II strike slightly laterally offset after the forging tools 17 of the forging level I or vice versa, whereby on the one hand the material longitudinal flow through the individual forging tools is not hindered, but on the other hand between a double hammer blow and the next there is sufficient time to properly subject the workpiece W to the required rotational and longitudinal feed via the clamping heads 9, 10.
  • the blank for example coming from a continuous casting plant and prepared appropriately for the forging, is transferred from a loading roller table 28 to the clamping head 10 by means of a loading device 27 and with longitudinal and rotary feed in the two forging levels I, II Desired cross-section reduction forged in one pass.
  • the forged workpiece is pulled axially by the clamping head 9, the clamping head 9 working to limit the extension path.
  • the forged workpiece comes to the intermediate storage point 7, the take-off rollers 14 ensuring the perfect further conveying of the workpiece from the forging unit 2 to the intermediate storage point 7, from where the driver 16 then feeds the workpiece to the rolling mill 3 after the material shear 15 has been cut to size, where it is rolled through the roll stands 4 to the specified cross-section.
  • the finished rod material is processed further in the usual manner depending on the intended use.

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

Claims (5)

  1. Installation de forgeage et de laminage (1) pour fabriquer des pièces en forme de tiges ou similaires, en particulier en aciers très fortement alliés, comprenant un ensemble de forgeage (2) qui comporte des outils de forgeage (17, 18) agissant radialement sur la pièce (W), laquelle est guidée dans le sens longitudinal par l'intermédiaire de guide-pièces, et comprenant un laminoir (3) qui est monté en aval de l'ensemble de forgeage (2) et qui comporte au moins deux cages de laminoir (4), cependant qu'il est prévu entre l'ensemble de forgeage (2) et le laminoir (3) un emplacement de stockage intermédiaire (7) qui est destiné à la pièce forgée (W) et dont la longueur est adaptée à celle-ci, caractérisée par le fait que les guide-pièces sont constitués par deux têtes de serrage (9, 10) qui peuvent être déplacées en va-et-vient des deux côtés de l'ensemble de forgeage (2) et qui reçoivent deux mandrins de serrage (11, 12) pouvant être entraînés en rotation et en translation en vue d'un déplacement en rotation et d'un déplacement longitudinal de la pièce, par le fait que la tête de serrage (9) qui est située du côté de l'emplacement de stockage intermédiaire comporte un passage (13) destiné à la pièce en vue de l'extraction de celle-ci dans le sens axial, et par le fait qu'une paire de rouleaux d'extraction (14) qui peuvent être entraînés est disposée en amont de l'emplacement de stockage intermédiaire (7), et qu'un mécanisme d'entraînement (16) combiné à une cisaille à ébouter (14) est disposé de préférence en aval de cet emplacement.
  2. Installation de forgeage et de laminage selon la revendication 1, caractérisée par le fait que l'emplacement de stockage intermédiaire (7) est équipé d'un dispositif de maintien en température et/ou d'un dispositif de chauffage (8).
  3. Installation de forgeage et de laminage selon la revendication 1, caractérisée par le fait que l'ensemble de forgeage (2) comporte des outils de forgeage (17, 18) qui travaillent dans deux plans de forgeage (I, II) situés l'un derrière l'autre.
  4. Installation de forgeage et de laminage selon la revendication 3, comprenant des outils de forgeage entraînés par des excentriques et caractérisée par le fait que les outils de forgeage (17, 18) de deux plans de forgeage (I, II) sont disposés dans un carter de forge commun (19), les outils de forgeage (17, 18) des deux plans de forgeage (I, II) étant montés chacun sur un arbre à excentriques commun (22).
  5. Installation de forgeage et de laminage selon la revendication 3 ou 4, caractérisée par le fait que les outils de forgeage (18) du deuxième plan de forgeage (II) frappent la pièce immédiatement après les outils de forgeage (17) du premier plan de forgeage (I).
EP92890098A 1992-04-21 1992-04-21 Machine de forgeage pour fabriquer des ébauches en forme de barre ou similaires Expired - Lifetime EP0566818B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE59206572T DE59206572D1 (de) 1992-04-21 1992-04-21 Schmiedewalzanlage zum Herstellen stabförmiger Werkstücke od.dgl.
EP92890098A EP0566818B1 (fr) 1992-04-21 1992-04-21 Machine de forgeage pour fabriquer des ébauches en forme de barre ou similaires
AT92890098T ATE139157T1 (de) 1992-04-21 1992-04-21 Schmiedewalzanlage zum herstellen stabförmiger werkstücke od.dgl.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92890098A EP0566818B1 (fr) 1992-04-21 1992-04-21 Machine de forgeage pour fabriquer des ébauches en forme de barre ou similaires

Publications (2)

Publication Number Publication Date
EP0566818A1 EP0566818A1 (fr) 1993-10-27
EP0566818B1 true EP0566818B1 (fr) 1996-06-12

Family

ID=8212293

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92890098A Expired - Lifetime EP0566818B1 (fr) 1992-04-21 1992-04-21 Machine de forgeage pour fabriquer des ébauches en forme de barre ou similaires

Country Status (3)

Country Link
EP (1) EP0566818B1 (fr)
AT (1) ATE139157T1 (fr)
DE (1) DE59206572D1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE144927T1 (de) * 1993-12-17 1996-11-15 Hasenclever Maschf Sms Anlage zum streckschmieden von rohblöcken
ES2155985T3 (es) * 1997-11-13 2001-06-01 Gfm Beteiligungs & Man Gmbh Maquina recalcadora rotativa.
CN101456059B (zh) * 2007-12-12 2011-11-23 中冶京诚工程技术有限公司 专用自由锻造液压机组及其使用方法
CN102314973B (zh) * 2011-06-16 2016-08-17 重庆仪表材料研究所 一种铠装电缆预热式冷旋转锻压装置及其锻压方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT264973B (de) * 1966-05-23 1968-09-25 Ges Fertigungstechnik & Maschb Vorrichtung zum Streckschmieden strangförmigen Gutes
US3472058A (en) * 1966-12-30 1969-10-14 Black Clawson Co Forging apparatus
DE2659472A1 (de) * 1976-12-30 1978-07-13 Peltzer & Ehlers Verfahren zur herstellung von pressteilen sowie vorrichtung hierfuer
US4899570A (en) * 1988-04-05 1990-02-13 Teledyne Industries, Inc. Apparatus and method of rotary forging with induction heating
JP2593534B2 (ja) * 1988-11-11 1997-03-26 株式会社日立製作所 熱間圧延設備

Also Published As

Publication number Publication date
DE59206572D1 (de) 1996-07-18
ATE139157T1 (de) 1996-06-15
EP0566818A1 (fr) 1993-10-27

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