EP2745954B1 - Procédé de forgeage - Google Patents

Procédé de forgeage Download PDF

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Publication number
EP2745954B1
EP2745954B1 EP13196889.3A EP13196889A EP2745954B1 EP 2745954 B1 EP2745954 B1 EP 2745954B1 EP 13196889 A EP13196889 A EP 13196889A EP 2745954 B1 EP2745954 B1 EP 2745954B1
Authority
EP
European Patent Office
Prior art keywords
forging
workpiece
feed direction
tools
work piece
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.)
Revoked
Application number
EP13196889.3A
Other languages
German (de)
English (en)
Other versions
EP2745954B8 (fr
EP2745954A2 (fr
EP2745954A3 (fr
Inventor
Rupert Wieser
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 GmbH
Original Assignee
GFM 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=49765864&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2745954(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by GFM GmbH filed Critical GFM GmbH
Publication of EP2745954A2 publication Critical patent/EP2745954A2/fr
Publication of EP2745954A3 publication Critical patent/EP2745954A3/fr
Application granted granted Critical
Publication of EP2745954B1 publication Critical patent/EP2745954B1/fr
Publication of EP2745954B8 publication Critical patent/EP2745954B8/fr
Revoked 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
    • 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
    • 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
    • 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
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
    • B21K27/02—Feeding devices for rods, wire, or strips

Definitions

  • the invention relates to a method for forging a workpiece, which is processed by means of rotationally symmetrically arranged, radially acting on the workpiece forging tools in a plurality of stitches with at least partially opposite feed direction, as is known from FR 2 147 980 A1 is known.
  • the deformations of the workpiece and the resulting flow conditions depend on the geometry of the forging tools. If forging tools are used in which the forming surfaces facing the feed direction of the workpiece are inclined relative to the forging axis, a comparatively large reduction in cross section per stitch can be achieved, which means a reduction in the number of stitches required for a given reduction in cross section and thus a reduction in forging time allowed, in particular when the workpiece is machined alternately with opposite feed direction, so that empty feeds of the workpiece can be avoided.
  • Such forging with successive stitches with opposite feed direction requires symmetrically designed forging tools with respect to their longitudinal center.
  • the reduction in cross section per stitch is limited by the width of the molding surface, so that forging a workpiece with predetermined final dimensions a larger number of stitches than forged tools with inclined mold surfaces is required.
  • the forging tools have a wedge shape in cross-section perpendicular to the forging axis, which in inclined forming surfaces to a Broadening of the mold surfaces with increasing distance from the forging axis leads.
  • due to the force effects of the differently oriented opposite the workpiece molding surfaces of the forging tools different voltages in the workpiece and thus different flow conditions, which may be important in some cases.
  • the forging hammers have differently inclined forming surfaces for the opposite directions of advance, so that after forging the slab to the end section, the slab is pulled out of the forging area in the main feed direction with the forge hammers open, and then the unblended end section of front end of the slab ago against the main feed direction can be finished by the forging hammers.
  • Such a forging method is not suitable for forging workpieces in multiple passes.
  • the invention is therefore based on the object of specifying a forging method which is suitable for low quantities and opens the possibility to have a special influence on the microstructure throughout the forging area.
  • the invention solves the stated object in that the workpiece is deformed depending on the feed direction with differently inclined mold surfaces of the forging tools.
  • a further advantageous influence on the forging behavior can be achieved in that the workpiece is deformed by means of a plurality of mutually opposite with respect to the forging axis paired opposed forging tools, which process the workpiece, at least in successive stitch groups successively or simultaneously.
  • the successive use of the pairwise operated forging tools can be advantageously used in particular in pipe production, because for the production of a hollow preform, the successive action of the pairs of tools on the workpiece per stitch brings advantages in terms of expansion of the hollow body with it.
  • the further processing of the preform can then be carried out in the usual way with the help of the simultaneously used forging tools.
  • the illustrated forging apparatus has conventionally a frame 1 with four opposite each other in pairs with respect to a forging axis 2 forging tools 3, which are acted upon by adjusting drives radially to the forging axis 2 and equipped with forging hammers 4.
  • the adjusting drives for the paired forging tools 3 can be operated simultaneously or at a time interval, depending on the selected forging process for the tool pairs, so that the workpiece 5 are processed simultaneously or in sections by the distributed over its circumference forging tools.
  • the workpiece 5 is detected by means of clamping devices 6 each end and rotated about the forging axis 2.
  • the clamping devices 6 themselves are on Supported carriage 7, which are movable along guides 8 and provide for opposite feed directions of the workpiece 5.
  • feed direction 9 of the forging hammer 4 forms a sloping inclined to the workpiece 5 mold surface 10, which merges into a parallel to the forging axis 2 forming surface 11.
  • the inclined mold surface 10 can, unlike the embodiment, also have two or more sections with different inclination.
  • the shaping surfaces 10, 11 deviating from a planar course in adaptation to the workpiece to be forged can also be conical or cylindrical.
  • the axis-parallel shaping surface 11 forms the inlet-side shaping surface, which is decisive for workpiece machining, for the opposite feed direction 12, as shown in FIG Fig. 3 is shown.
  • From the dash-dotted line outline of the workpiece in front of the illustrated forging stroke of the forging hammer 4 shows that the deformed per Schmiedehub volume elements 13 are different and that due to the different force effects due to the different orientations of the forming surfaces 10, 11 relative to the workpiece 5 results in different forming conditions, which can be utilized by combination due to a suitable sequence of feed directions 9, 12 in a variety of ways to achieve certain material properties.
  • 8 stitches can be provided according to the invention, wherein the first four stitches, the diameter stepwise to 325, 295, 255 and 217 mm, are performed with the feed direction 9, in order to achieve a high cross-sectional reduction due to the inclined mold surface 10.
  • the subsequent four stitches are made alternately with the feed directions 12 and 9, wherein in the feed direction 12 according to the Fig. 3
  • the workpiece diameter is reduced from 217 to 192 mm. In the subsequent three passes with alternating feed direction 9, 12 then the workpiece diameter can be reduced to 163 and 138 mm and finally to the final diameter of 122 mm.

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

Claims (3)

  1. Procédé pour le forgeage d'une pièce à travailler (5), qui est travaillée à l'aide d'outils de forgeage (3) agissant radialement sur la pièce à travailler (5), disposés de manière symétrique en rotation, en plusieurs passes avec au moins, en partie, une direction d'alimentation (9, 12) opposée, caractérisé en ce que la pièce à travailler (5) est déformée avec des inclinaisons différentes de matrices (10, 11) des outils de forgeage (3) en fonction de la direction d'alimentation (9, 12).
  2. Procédé selon la revendication 1, caractérisé en ce que la pièce à travailler (5) est déformée dans une direction d'alimentation (9) avec une matrice (10) inclinée, à l'opposé de la pièce à travailler (5) dans la direction d'alimentation (9) et, dans la direction d'alimentation (12) en sens inverse, avec une matrice (11) parallèle à l'axe de forgeage (2).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la pièce à travailler (5) est déformée à l'aide de plusieurs outils de forgeage (4), face à face, par paire, en regard de l'axe de forgeage (2), qui travaillent la pièce à travailler (5) en même temps ou tour à tour au moins en groupes de passes successifs.
EP13196889.3A 2012-12-13 2013-12-12 Procédé de forgeage Revoked EP2745954B8 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50588/2012A AT513701B1 (de) 2012-12-13 2012-12-13 Verfahren zum Schmieden eines Werkstücks

Publications (4)

Publication Number Publication Date
EP2745954A2 EP2745954A2 (fr) 2014-06-25
EP2745954A3 EP2745954A3 (fr) 2014-11-26
EP2745954B1 true EP2745954B1 (fr) 2016-03-16
EP2745954B8 EP2745954B8 (fr) 2016-06-22

Family

ID=49765864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13196889.3A Revoked EP2745954B8 (fr) 2012-12-13 2013-12-12 Procédé de forgeage

Country Status (2)

Country Link
EP (1) EP2745954B8 (fr)
AT (1) AT513701B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109047635A (zh) * 2018-10-30 2018-12-21 新昌县奔力机械有限公司 一种制作刀坯用的锻压设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB777928A (en) 1953-11-05 1957-07-03 Stewarts & Lloyds Ltd Process and means for reducing the diameter of tubes and solids and reducing the diameter and wall thickness of tubes by swaging
FR2147980A1 (fr) 1971-08-04 1973-03-11 Gem Fertigungatechnik
EP0157575A2 (fr) 1984-03-29 1985-10-09 Kawasaki Steel Corporation Procédé de réduction en largeur de plaques par pressage et presse à cet effet
DE102008047782A1 (de) 2007-09-17 2009-06-18 Grammer Ag Vorrichtung zum Rundkneten von Werkstücken

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB777928A (en) 1953-11-05 1957-07-03 Stewarts & Lloyds Ltd Process and means for reducing the diameter of tubes and solids and reducing the diameter and wall thickness of tubes by swaging
FR2147980A1 (fr) 1971-08-04 1973-03-11 Gem Fertigungatechnik
AT307203B (de) 1971-08-04 1973-05-10 Gfm Fertigungstechnik Werkzeug zum Rundschmieden für Schmiedemaschinen mit zwei gegeneinander schlagenden Hämmern
EP0157575A2 (fr) 1984-03-29 1985-10-09 Kawasaki Steel Corporation Procédé de réduction en largeur de plaques par pressage et presse à cet effet
DE102008047782A1 (de) 2007-09-17 2009-06-18 Grammer Ag Vorrichtung zum Rundkneten von Werkstücken

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"The New Radialforger", 2000, Steyr, Österreich ;
R.S. WATTS: "Ideas on the Future Development of a Hammer Forge", BISRA FIFTH CONFERENCE ON FORGING, 16 June 1966 (1966-06-16), London, pages 53 - 66
RUPERT WIESER: "The new GFM radialforger - an improved equipment for the radial forging technology", 13TH INTERNATIONAL FORGEMASTERS MEETING, vol. II, 12 October 1997 (1997-10-12), Pusan, Südkorea, pages 427 - 439

Also Published As

Publication number Publication date
AT513701B1 (de) 2015-06-15
EP2745954B8 (fr) 2016-06-22
EP2745954A2 (fr) 2014-06-25
EP2745954A3 (fr) 2014-11-26
AT513701A1 (de) 2014-06-15

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