EP2886810B1 - Procédé de fabrication d'un composant cylindrique - Google Patents

Procédé de fabrication d'un composant cylindrique Download PDF

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Publication number
EP2886810B1
EP2886810B1 EP14193323.4A EP14193323A EP2886810B1 EP 2886810 B1 EP2886810 B1 EP 2886810B1 EP 14193323 A EP14193323 A EP 14193323A EP 2886810 B1 EP2886810 B1 EP 2886810B1
Authority
EP
European Patent Office
Prior art keywords
blank
shell
unprocessed part
pressure
housing
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
EP14193323.4A
Other languages
German (de)
English (en)
Other versions
EP2886810A1 (fr
Inventor
Helmut Eibl
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.)
MTU Aero Engines AG
Original Assignee
MTU Aero Engines 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 MTU Aero Engines AG filed Critical MTU Aero Engines AG
Publication of EP2886810A1 publication Critical patent/EP2886810A1/fr
Application granted granted Critical
Publication of EP2886810B1 publication Critical patent/EP2886810B1/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
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/26—Making machine elements housings or supporting parts, e.g. axle housings, engine mountings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/4932—Turbomachine making

Definitions

  • the invention relates to a method for producing a cylindrical component for flow machines according to the preamble of claim 1.
  • Raw parts for cylindrical housing such.
  • As engine casing are typically ring-rolled.
  • the heated toroidal blank is rolled between a cylindrical mandrel roller disposed within the blank and a cylindrical main roller disposed outside the blank, the axes of the mandrel roller and the main roller being parallel to the axis of the workpiece to be formed.
  • two conical-shaped axial rollers are arranged on the side diametrically opposite the blank above and below the blank.
  • the dome roll and the main roll determine the radial thickness of the blank (also referred to as the wall thickness of the blank) and the two axial rolls determine the axial length of the blank.
  • the housing has ribs, so that the wall thickness of the blank must be at least as large as the rib height.
  • cylindrical housings typically do not have a uniform thickness.
  • the ribs worked out. It is particularly disadvantageous because a very large chip volume is generated.
  • the ring must be cut to form a half shell, so that a further working step is required in order to be able to produce the end product.
  • DE 25 32 738 discloses a method of forming a metal sheet of poor moldability into a hemispherical article.
  • a metal sheet between two cover plates made of soft steel is added and feinpulvriges graphite is used as a lubricant.
  • This entire composite is then heated and pressed into the hemispherical shape.
  • US 4,801,070 discloses a method of making a reinforced duct section for an engine.
  • a metal strip is bent into a hollow truncated cone and welded. Subsequently, the truncated cone is reshaped and stabilizing ribs are produced by means of cutting processes.
  • WO 2013/023867 A1 relates to a method for producing hemispherical acrylic sheets.
  • housings of turbomachinery must meet in particular the so-called für Bachskriterium (containment). This means that in the housing located rotating components in case of a defect, e.g. Break a blade, not allowed to penetrate through the housing. If the housing is cast, so that the breakdown criterion can only be achieved by a correspondingly large mass. This has the disadvantage that the housing are heavier than machined housing.
  • the present invention is based on the object to present a method which results in the production of cylindrical components less chip volume and is more economical to manufacture.
  • the invention relates to a method for producing a cylindrical component of turbomachines. First, a heated blank is provided. Then the blank is pressure-formed into a flat blank. Subsequently, the flat blank is bent into a cylindrical half-shell and / or rolled. In this case, the blank can be heated above the recrystallization temperature of the blank material. This has the advantage that with respect to the ring rolling cutting to a half-shell is eliminated.
  • the flat blank is substantially cuboid. This has the advantage that little overhanging material is formed by the pressure forming and the flat blank has a similar shape as the later end product.
  • the flat blank on at least one of its contours on an allowance has the advantage that when printing, the missing dimensional accuracy can be compensated.
  • the allowance can be between 0 and 10 mm. In particular, the allowance may only be necessary on the contours, which later represent a bearing surface.
  • At least one rib and / or one eye is formed in at least one of the surfaces of the blank.
  • These elevations are mitgeformt same during the pressure deformation. This has the advantage that these surveys do not have to be worked out of the solid material. Compared to ring rolling produces no or hardly any chip volume. In this case, the elevations can advantageously be produced in the surface of the blank without oversize, so that the ribs, the eyes or Augan ceremoniesn must not be reworked.
  • At least one bearing surface of the half-shell is machined to a final dimension, in particular milled. This is particularly advantageous because it allows a higher dimensional accuracy can be achieved than with the pressure deformation is even possible. A finishing is then only in the required places, such. the contact surfaces, necessary, so that only a minimum amount of chip volume is created.
  • the pressure forming is carried out by drop forging.
  • the shape of the forging (blank) is shown as a negative in the upper and lower die.
  • closed dies are used. This has the advantage that it is handled very sparingly with the blank material, since the volume of the blank is only slightly larger than the finished half-shell.
  • a housing has two half shells. These half-shells have identical outer contours after the pressure deformation. This has the advantage that the upper half-shell of a housing can be made with the same dies as the lower half-shell of the housing, so that only one set of dies is needed. This saves tool costs.
  • the different half shells may have different eyes for attaching holders. These differences are incorporated into the corresponding half shell only after the pressure has been converted.
  • FIG. 1 is a plan view of an inventive substantially cuboidal To see blank 2.
  • the flat blank 2 is forged in advance with closed die in advance.
  • the blank 2 has an upper longitudinal edge 4 and a lower longitudinal edge 6, which at their ends via a in the FIG. 1 left first transverse edge 8 and one in the FIG. 1 Right second transverse edge 10 shown are connected. Between the edges 4 to 10, the outer surface 12 can be seen.
  • a first flange extension 14 is formed, which has the maximum thickness d m of the blank 2.
  • a second flange projection 16 is formed, which may also have the maximum thickness d m of the blank 2.
  • the blank 2 is designed somewhat thinner and has a thickness h R , which is smaller than the maximum thickness d m .
  • transverse ribs 18 to 30 are typically defined by the strength requirements. In this case, all transverse ribs 18 to 30 may have the same thickness d R. Between the transverse ribs 22 and 24 two Augan accounts 32 and 34 are formed, which can be pierced in a later method step. It is also conceivable that, instead of eye attachments 32 and 34, eyes can be generated directly during pressure forming. This would save a subsequent machining (eg drilling).
  • transverse ribs 26 to 30 may be connected to one another via a longitudinal rib 36, if this is necessary, for example, for structural mechanical reasons.
  • the outer surface 12 with all the corresponding contours, such as ribs and / or eyebrows or eyes, can preferably be produced without oversize for swaging, so that a later processing of this surface 12 is omitted.
  • the blank 2 is then bent or rolled, so that in the FIG. 2 Imaged substantially cylindrical half shell 40 is formed.
  • the longitudinal edges 4 and 6 are bent so that the first and second bearing surfaces 13 and 15 form a semicircle describe, wherein the outer surface 12, the lateral surface of the half-cylinder.
  • the individual support surface 13, 15, 17 and 19 can be additionally machined, preferably by machining, in order to obtain the required dimensional accuracy.
  • a high planarity of the bearing surfaces 17 and 19 is required if two such half-shells to be assembled into a housing. This then ensures that between the two half-shells 40 on the bearing surfaces 17 and 19, the required tightness is achieved.
  • different paragraphs 44 may be present.

Landscapes

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

Claims (8)

  1. Procédé de fabrication d'un composant cylindrique pour turbomachines, avec les étapes suivantes :
    - mise à disposition d'une ébauche chauffée,
    - formage par pression de l'ébauche en une pièce brute plate (2),
    caractérisé en ce que
    dans au moins une des surfaces (12) de la pièce brute, au moins une nervure (18, 20, 22, 24, 26, 28, 30) et/ou un oeillet (32, 34) est réalisé sous forme de surélévation, dans lequel la surélévation est formée lors du formage par pression, et en ce que la pièce brute plate (2) avec la surélévation est cintrée et/ou roulée en une demi-coque cylindrique (40).
  2. Procédé selon la revendication 1, caractérisé en ce que la pièce brute plate (2) est sensiblement parallélépipédique.
  3. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la pièce brute plate (2) présente une surdimension sur au moins un de ses contours (13, 15, 17, 19).
  4. Procédé selon la revendication 3, caractérisé en ce que la surdimension est entre 0 et 10 mm.
  5. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins une surface d'appui (13, 15) de la demi-coque (40) est usinée, en particulier fraisée, jusqu'à une dimension finale.
  6. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le formage par pression se fait par matriçage.
  7. Carter avec au moins deux demi-coques fabriquées selon au moins l'une quelconque des revendications précédentes, dans lequel les deux demi-coques (40) présentent des contours extérieurs identiques après le formage par pression.
  8. Turbomachine avec au moins un carter selon la revendication 7 et/ou avec au moins une demi-coque (40) fabriquée selon au moins l'une quelconque des revendications 1 à 6.
EP14193323.4A 2013-12-16 2014-11-14 Procédé de fabrication d'un composant cylindrique Not-in-force EP2886810B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013225987.5A DE102013225987B3 (de) 2013-12-16 2013-12-16 Verfahren zur Herstellung eines zylinderförmigen Bauteils, Gehäuse und Strömungsmaschine

Publications (2)

Publication Number Publication Date
EP2886810A1 EP2886810A1 (fr) 2015-06-24
EP2886810B1 true EP2886810B1 (fr) 2017-03-15

Family

ID=52006811

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14193323.4A Not-in-force EP2886810B1 (fr) 2013-12-16 2014-11-14 Procédé de fabrication d'un composant cylindrique

Country Status (3)

Country Link
US (1) US9821368B2 (fr)
EP (1) EP2886810B1 (fr)
DE (1) DE102013225987B3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115156854B (zh) * 2022-07-26 2024-03-29 贵州航天电子科技有限公司 一种半圆形柱状壳体零件加工方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5339183B2 (fr) * 1974-07-22 1978-10-19
US3992764A (en) * 1975-09-22 1976-11-23 The Torrington Company Method of forming a roller cage
DE2549072C3 (de) * 1975-11-03 1982-05-27 Hillesheim, Hans, 6781 Höhfröschen Vorrichtung zur Herstellung von Durchbrüchen in Bandmaterial aus Metallblech
US4083221A (en) * 1976-07-29 1978-04-11 Duffy Tool & Stamping, Inc. Parts forming apparatus and method
US4801070A (en) * 1987-05-11 1989-01-31 Rohr Industries, Inc. Engine duct and case construction
JPH07127646A (ja) * 1993-10-29 1995-05-16 Ntn Corp ころ軸受用保持器
JP3826995B2 (ja) * 2000-02-16 2006-09-27 トヨタ自動車株式会社 キャリヤの製造方法
US20040250404A1 (en) * 2003-01-14 2004-12-16 Cripsey Timothy J. Process for press forming metal tubes
DE102010005059A1 (de) * 2010-01-20 2011-07-21 Schaeffler Technologies GmbH & Co. KG, 91074 Wälzlagerkäfig und Verfahren zur Herstellung eines Wälzlagerkäfigs
DE102011004192A1 (de) * 2011-02-16 2012-08-16 Schaeffler Technologies Gmbh & Co. Kg Planetenradträger
EP2744638B1 (fr) * 2011-08-17 2016-04-27 Evonik Röhm GmbH Deformation biaxiale de plaques en verre acrylique a paroi epaisse

Also Published As

Publication number Publication date
US9821368B2 (en) 2017-11-21
EP2886810A1 (fr) 2015-06-24
DE102013225987B3 (de) 2015-08-06
US20150165516A1 (en) 2015-06-18

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