EP3233326A1 - Procédé et dispositif pour marteler une pièce en forme de barre - Google Patents

Procédé et dispositif pour marteler une pièce en forme de barre

Info

Publication number
EP3233326A1
EP3233326A1 EP15825907.7A EP15825907A EP3233326A1 EP 3233326 A1 EP3233326 A1 EP 3233326A1 EP 15825907 A EP15825907 A EP 15825907A EP 3233326 A1 EP3233326 A1 EP 3233326A1
Authority
EP
European Patent Office
Prior art keywords
forging
workpiece
axis
cross
tools
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.)
Granted
Application number
EP15825907.7A
Other languages
German (de)
English (en)
Other versions
EP3233326B1 (fr
Inventor
Robert Koppensteiner
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
Application filed by GFM GmbH filed Critical GFM GmbH
Publication of EP3233326A1 publication Critical patent/EP3233326A1/fr
Application granted granted Critical
Publication of EP3233326B1 publication Critical patent/EP3233326B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/02—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough
    • B21J1/025—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough affecting grain orientation
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working

Definitions

  • the invention relates to a method for forging a rodförmi- gene workpiece, which is deformed by means of forging tools in the sense of a forging axis perpendicular cross-sectional displacement and subjected to axial feed and optionally a rotation about the forging axis in the engagement pauses of the forging tools, and on a Apparatus for carrying out the method.
  • the invention is therefore based on the object to provide a method by means of which the structure for workpieces can be significantly improved even with larger cross-sectional dimensions. Based on a method of the type described, the invention solves the problem by the fact that the workpiece is deformed in a bending zone between two central Abstützungen by the radially acting on the workpiece forging forging tools forging in the sense of the axis perpendicular to the forging axis cross-sectional displacement.
  • the workpiece is supported centrically on both sides of a bending zone and bent out of a coaxial position relative to the forging axis between these centric supports by forging tools acting radially to the forging axis, both occur during bending of the Workpiece from the forging axis and when bending back into the
  • the forging-related cross-sectional reduction of a workpiece and the final finishing enforces a workpiece axis coaxial to the forging axis, so that the workpiece during reduction forging and / or finishing for bending deformation can be supported centrally without additional measures.
  • Forging tools to be provided with molding surfaces that cause due to a different distance from the forging axis a relation to the forging axis eccentric cross section of the workpiece and thus a workpiece transverse displacement.
  • Such forming surfaces formed by the paired opposing forging tools with different distances from the forging axis are compulsory for bending out the workpiece according to the invention if they provide a forming surface which is eccentric relative to the forging axis between entry and exit side molding surfaces for a die cross section coaxial with the forge axis are.
  • the central support of the workpiece is formed immediately before and after the bending zone by the forging tools themselves, with the advantage that the bending curve for the workpiece can be specified throughout.
  • the inlet-side shaping surfaces form a forming space that tapers in the feed direction, in a conventional manner a cross-sectional reduction in conjunction with additional grain refinement is achieved by a deflection of the workpiece transversely to the forging axis.
  • the molding surfaces can also provide for a cross-sectional reduction.
  • the discharge side molding surfaces of the forging tools can form a sizing tool to obtain a workpiece having a fine-grained texture and a good surface quality after the forging process.
  • Fig. 1 shows two of the four employed to form a mold cavity, each other in pairs opposed forging tools of a forging apparatus according to the invention in a view of the molding surfaces
  • Fig. 2 is a section along the line II-II of Fig. 1,
  • Fig. 5 is a section along the line V-V of Fig. 2 and
  • only the four forging tools 1, 2, 3, 4 which are opposite one another in pairs and radially actable on a forging axis a are in a forging-shaped workpiece 5, indicated in phantom educative employment.
  • These forging tools 1, 2, 3, 4 form forming surfaces 6 on the inlet side, which form a coaxial cavity to the forging axis a and due to their inclined in the feed direction 7 course cause a cross-sectional reduction.
  • On the outlet side molding surfaces 8 are provided, which also determine a coaxial forging axis a mold space and advantageously provide for an additional reduction in cross-section, which supports the centric guidance of the workpiece 5 in the area of the outlet side molding surfaces 8.
  • the outlet side mold surfaces can also be used as a finishing tool.
  • the axis of the workpiece cross-section is denoted by 10 and extends offset relative to the forging axis a, so that the workpiece 5 is opposite the inlet and outlet side, by the forming surfaces 6 and 8 formed, the workpiece 5 coaxial with the forging axis a leading Abstützept 1 1 is bent.
  • the invention is of course not limited to the illustrated embodiment.
  • the grain refinement according to the invention can also be used for workpieces with a rectangular cross section. In this case, the workpiece rotation is eliminated during the feed steps.
  • the invention is not limited to this embodiment.
  • the supports 1 1 formed by the forming surfaces 6 and 8 could be moved upstream and downstream of the forging tools, so that the forging tools only have the task of forming a bending zone 13 for the workpiece 5, for which only two opposing forging tools are required.
  • the supports 1 1 could be formed by upstream and downstream forging tools, but this is not mandatory, because the supports 1 1 for the centric guidance of the workpiece 5 coaxial with the forging axis a need not be designed in the form of forging tools.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Forging (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour marteler une pièce en forme de barre (5) qui est déformée à l'aide d'outils de martelage (1, 2, 3, 4) dans le sens d'un déplacement de section transversale perpendiculaire à l'axe de martelage (a), et qui est soumise durant les pauses entre les actions des outils de martelage (1, 2, 3, 4) à une avance axiale et, le cas échéant, à une rotation autour de l'axe de martelage (a). L'invention vise à obtenir un affinage avantageux du grain. À cet effet, la pièce (5) est déformée dans une zone de flexion (13) entre deux appuis (11) centriques, par les outils de martelage (1, 2, 3, 4) agissant sur la pièce (5) radialement à l'axe de martelage (a), dans le sens du déplacement de la section transversale, perpendiculaire à l'axe de martelage (a).
EP15825907.7A 2014-12-16 2015-12-15 Procédé et dispositif pour marteler une pièce en forme de barre Active EP3233326B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50911/2014A AT516506B1 (de) 2014-12-16 2014-12-16 Verfahren und Vorrichtung zum Schmieden eines stabförmigen Werkstücks
PCT/AT2015/050317 WO2016094919A1 (fr) 2014-12-16 2015-12-15 Procédé et dispositif pour marteler une pièce en forme de barre

Publications (2)

Publication Number Publication Date
EP3233326A1 true EP3233326A1 (fr) 2017-10-25
EP3233326B1 EP3233326B1 (fr) 2019-10-09

Family

ID=55174463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15825907.7A Active EP3233326B1 (fr) 2014-12-16 2015-12-15 Procédé et dispositif pour marteler une pièce en forme de barre

Country Status (4)

Country Link
US (1) US10525523B2 (fr)
EP (1) EP3233326B1 (fr)
AT (1) AT516506B1 (fr)
WO (1) WO2016094919A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109604494B (zh) * 2019-01-15 2023-06-27 苏州市东盛锻造有限公司 一种超大型羊头锻件的锻造方法
CN114178450B (zh) * 2021-11-23 2024-06-14 内蒙古北方重工业集团有限公司 超细长超高压钢管坯料的加工方法
DE102021131279A1 (de) * 2021-11-29 2023-06-01 Aesculap Ag Medizinischer Clip, Umformwerkzeug, Umformmaschine und Verfahren zum Herstellen eines medizinischen Clips

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT307203B (de) 1971-08-04 1973-05-10 Gfm Fertigungstechnik Werkzeug zum Rundschmieden für Schmiedemaschinen mit zwei gegeneinander schlagenden Hämmern
US4276764A (en) * 1979-07-17 1981-07-07 Kozhevnikov Vladislav A Die set for sizing sections
SU925503A1 (ru) * 1980-06-30 1982-05-07 Предприятие П/Я Г-4781 Способ ковки слитков
US4982596A (en) * 1990-01-26 1991-01-08 Buell Industries, Inc. Die for manufacturing a fastener blank
RU2047415C1 (ru) * 1992-07-15 1995-11-10 Жасулан Аманжолович Ашкеев Способ изготовления поковок
KR100345290B1 (ko) 2000-01-28 2002-07-25 한국과학기술연구원 연속 전단변형장치
RU2406588C2 (ru) * 2008-12-19 2010-12-20 Открытое Акционерное Общество "Тяжпрессмаш" Способ ковки заготовки в четырехбойковом ковочном устройстве
DE102009050543B3 (de) * 2009-10-23 2011-05-26 Peter Prof. Dr.-Ing. Dipl.-Wirtsch.-Ing. Groche Verfahren und Vorrichtung zur Herstellung von feinkörnigen, polykristallinen Werkstoffen oder Werkstücken aus länglichen oder rohrförmigen Halbzeugen

Also Published As

Publication number Publication date
AT516506B1 (de) 2016-06-15
WO2016094919A1 (fr) 2016-06-23
US20170320125A1 (en) 2017-11-09
AT516506A4 (de) 2016-06-15
EP3233326B1 (fr) 2019-10-09
US10525523B2 (en) 2020-01-07

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