EP3379189A1 - Porte-pièce et procédé de fabrication - Google Patents

Porte-pièce et procédé de fabrication Download PDF

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Publication number
EP3379189A1
EP3379189A1 EP18160920.7A EP18160920A EP3379189A1 EP 3379189 A1 EP3379189 A1 EP 3379189A1 EP 18160920 A EP18160920 A EP 18160920A EP 3379189 A1 EP3379189 A1 EP 3379189A1
Authority
EP
European Patent Office
Prior art keywords
support
workpiece carrier
workpiece
workpieces
support element
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
EP18160920.7A
Other languages
German (de)
English (en)
Other versions
EP3379189B1 (fr
Inventor
Björn PFEFFER
Bernd GROOS
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.)
Schunk Kohlenstofftechnik GmbH
Original Assignee
Schunk Kohlenstofftechnik 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 Schunk Kohlenstofftechnik GmbH filed Critical Schunk Kohlenstofftechnik GmbH
Publication of EP3379189A1 publication Critical patent/EP3379189A1/fr
Application granted granted Critical
Publication of EP3379189B1 publication Critical patent/EP3379189B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0006—Composite supporting structures
    • F27D5/0018—Separating elements
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0025—Supports; Baskets; Containers; Covers
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/02—Skids or tracks for heavy objects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0006—Composite supporting structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0006—Composite supporting structures
    • F27D5/0012—Modules of the sagger or setter type; Supports built up from them
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0031—Treatment baskets for ceramic articles

Definitions

  • the invention relates to a workpiece carrier and a method for producing a workpiece carrier for providing and handling workpieces in high-temperature furnaces for high-temperature treatment or the like, wherein the workpiece carrier is formed from a support grid with workpiece holders for positioning workpieces on the workpiece carrier, wherein the support grid from a grid structure forming support struts is formed, wherein the support struts of carbon fiber reinforced carbon (CFC) are formed, wherein the workpiece receptacles are formed on the support struts arranged positioning of the workpiece carrier, wherein the positioning means are formed and arranged on the support struts that workpieces on the workpiece holders in a predetermined position can be arranged.
  • CFC carbon fiber reinforced carbon
  • Such workpiece carriers are well known and are regularly used for receiving and transporting workpieces in the context of high temperature treatments.
  • a high-temperature treatment here is a workpiece treatment in a high-temperature furnace at a temperature of more than 1,000 ° C understood.
  • existing workpieces are annealed in the context of high temperature treatment, in order to achieve an improvement in the properties of the relevant workpiece.
  • the workpieces are arranged on the workpiece carrier so that the workpieces are exposed as possible on all sides of a furnace atmosphere in order to achieve a homogeneous heating of the respective workpieces.
  • the known workpiece carriers are regularly formed from a support grid, which is composed of support struts, which in turn form a grid structure. Although it is also known to form the support struts of metal, but the metal support struts can easily distort or bend at high temperatures. Carbon fiber reinforced carbon (CFC) formed supporting struts, however, are dimensionally stable and sufficiently strong even at high temperatures. On the support struts positioning can be arranged, forming the workpiece holders. This makes it possible to arrange a plurality of workpieces in a predetermined position or position on or on the workpiece carrier.
  • CFC Carbon fiber reinforced carbon
  • a Separating layer may consist of a ceramic material and applied by applying a paint or by plasma spraying on the workpiece carrier.
  • a workpiece carrier which has a plurality of arranged on a support grid positioning, wherein the positioning means are formed as ceramic rods, which are arranged in transversely to the round rods, provided with receiving grooves supporting struts of the support grid.
  • the round rods are made of an extruded ceramic material and not thermally shock resistant, that is, the round rods can be easily damaged by rapid formation of cracks during rapid temperature changes. Also, they are very brittle and can break easily.
  • the present invention is therefore based on the object to propose a workpiece carrier and a method for producing a workpiece carrier, by which or a heat treatment of a workpiece can be performed reliably.
  • the workpiece carrier according to the invention for the provision and handling of workpieces in high-temperature furnaces for high-temperature treatment or the like is made of a support grid with workpiece holders designed for positioning of workpieces on the workpiece carrier, wherein the support grid is formed of a grid structure forming support struts, wherein the support struts of carbon fiber reinforced carbon (CFC) are formed, wherein the workpiece holders are formed on arranged on the support struts positioning of the workpiece carrier, wherein the positioning means formed and arranged on the support struts that workpieces on the workpiece holders in a predetermined position can be arranged, wherein the positioning means comprises a support element for the arrangement of workpieces, wherein the support element is formed of a ceramic fiber composite material, wherein the positioning means arranged on a support strut support member for Arrangement of the support element has.
  • CFC carbon fiber reinforced carbon
  • the support element of the positioning device is therefore designed for the arrangement of workpieces and is in direct contact with this.
  • the fact that the support element is formed of a ceramic fiber composite material, it is thicker than a simple coating, so that it can hardly wear out mechanically. At the same time it is due to the fiber reinforcement very stable, that is not brittle, and resistant to rapid temperature changes. In addition, contamination of workpieces by carbon of the support grid can be prevented by the fact that the workpieces rest exclusively on the support elements. Since the production of a bearing element of ceramic fiber composite material is much more costly than a production of carbon fiber reinforced carbon, it is possible by the arrangement of the support element on the support member of the positioning advantageously that support element with little material, and thus also inexpensive to manufacture.
  • the support element arranged on the support strut accordingly serves for supporting or receiving the support element consisting of the ceramic fiber composite material on the support strut or on the support struts.
  • the support element then does not have to be designed so stable that it alone can absorb a weight of the workpieces concerned. This makes it possible that support element using only a few ceramic fiber composites and thus cost-effective form.
  • the ceramic fiber composite material may be formed from an oxide ceramic, preferably an inorganic matrix of aluminum oxide, mullite, zirconium oxide, silicon carbide or silicon nitride. Such materials are particularly suitable for the production of a ceramic fiber composite material.
  • the ceramic fiber composite material of inorganic fibers preferably reinforcing fibers of alumina, mullite, zirconia, silicon carbide or silicon nitride, may be formed.
  • the inorganic fibers may be combined with an oxide ceramic matrix of a matching or of a different material. It can further be provided to combine inorganic fibers of different materials with one another.
  • the fibers may form a fiber composite, preferably a restructured, wound or woven fiber composite.
  • the fiber composite can be, for example, a textile fiber fabric. It can also be provided to form a fiber composite by winding fibers onto a mandrel with a final severing along a longitudinal axis of the mandrel. Further, 3,000 denier, 10,000 denier or 20,000 filament yarns can be made into fiber fabrics, which are then further processed into the ceramic fiber composite material.
  • unstructured fiber composite for example, a fiber felt or a fiber fleece can be used.
  • the support elements may be arranged in parallel relative to each other. For example, a number of parallel rows of workpiece holders can be formed on the workpiece carrier. The support elements can then be spaced apart so that, for example, workpieces can be held in a row arrangement between two support elements on the workpiece carrier. The support elements can consequently also be arranged in parallel relative to one another. The support struts can then also run parallel to the support elements or transversely to these due to the formed grid structure. In principle, however, it is also possible to form the support elements with any shape adapted to the respective workpieces.
  • the workpiece holder is V-shaped.
  • a V-shaped design of the workpiece holder allows centering and optionally clamping of the relevant workpiece in the workpiece holder, so that the workpiece can be held particularly secure in the workpiece holder.
  • the workpiece may be a turbine blade that forms a V-shaped foot to which the V-shaped workpiece holder is adapted.
  • the support element may advantageously have its wall thickness of> 0.5 mm to ⁇ 5 mm. So it can be ensured that there is no unwanted wear of the support element and the support element is sufficiently stable at the same time. However, not so much material is required for the support element that the cost of the workpiece carrier can be significantly increased.
  • the support member may be formed of graphite, for example.
  • the graphite may be extruded, shaken or isostatically pressed together with a binder and formed into the support element after a heat treatment.
  • the support element can form a receiving contour with a support surface for the arrangement of workpieces on the support element.
  • the Recording contour can then be adapted to the workpiece contour, so that it is always ensured that the workpiece rests exclusively on the support surface made of ceramic material or is contacted with this.
  • the receiving contour or the bearing surface can in principle be formed with any desired contour adapted to a workpiece contour.
  • the support element can form a contact contour, which is adapted to the receiving contour of the support element.
  • the support element can thus be supported, for example, over the entire surface of the contact contour, so that the support element can be made very thin. It can also be provided that the support element is formed as part of a production by placing it on the support element and thus by adapting to the contact contour in its shape.
  • the support member may be placed on a support strut or plugged, preferably be positively connected to the support strut.
  • one or more grooves may be formed in the support element, which allows the attachment of the support element to one or more support struts.
  • the respective groove then substantially corresponds to a thickness of a support strut.
  • the support element can be placed on the support member or plugged, preferably be positively connected to the support member.
  • the support element rests on the support element such that the support element and the support element can expand from one another uninfluenced. So it is also possible for the support element to choose a material having a significantly different thermal expansion coefficient than the material of the support element. However, it can be provided to fix the support element at a point in the manner of a fixed bearing on the support member positively, so that the support element can not be moved unintentionally on the support element or removed from it.
  • the support element and / or the support element can be designed in the shape of a profile.
  • a profile-shaped design simplifies a production substantially. It can also be provided that on a support element a plurality of support elements, which are then formed comparatively shorter than the support element, are placed.
  • the support grid may comprise a support frame of support struts, wherein the support frame may have support elements made of graphite, via which the support struts are connected.
  • the support struts may, for example, have matching slots, over which the support struts are interconnected by nesting crosswise or under formation of the lattice structure.
  • the support elements can be arranged in graphite, in which the support struts are then inserted.
  • the workpiece carrier assembly comprises a workpiece carrier according to the invention with a first set of positioning means and a second set of positioning means different from the first set, wherein the positioning means are designed and can be arranged on the support struts that first workpieces and / or different from the first workpieces second workpieces can be arranged on the workpiece holders.
  • This makes it possible to provide or handle at least two different types of workpieces with only one support grid and the first and the second set of positioning as needed on the workpiece carrier.
  • the support grid is then formed independently of the workpieces and an adaptation to the respective workpieces is made via the respective set positioning.
  • the workpiece carrier assembly thus allows a modular use of different positioning, each alone or in combination. Further advantageous embodiments of a workpiece carrier assembly will become apparent from the feature descriptions of the dependent claims back to the device claim 1.
  • the workpiece carrier is formed from a support grid and workpiece holders for positioning workpieces on the workpiece carrier, wherein the support grid is formed from supporting struts forming a grid structure, wherein the support struts carbon fiber reinforced carbon (CFC) are formed, wherein the workpiece holders are formed from arranged on the support struts positioning of the workpiece carrier, wherein the positioning means are formed and arranged on the support struts that workpieces can be arranged on the workpiece holders in a predetermined position, wherein a support element the positioning device for the arrangement of workpieces is formed from a ceramic fiber composite material, wherein on a Tragst a support element of the positioning device for arranging the support element is arranged.
  • FIG. 1 and 2 shows a workpiece carrier 10 for providing and handling workpieces in high-temperature furnaces.
  • the workpiece carrier 10 is formed of a support grid 11 with workpiece holders 12 for positioning of workpieces, not shown here, on the workpiece carrier 10.
  • the support grid 11 is formed of a support frame 13 of support struts 14, 15, 16, 17 and support elements 18 made of graphite.
  • Support struts 19, 20 form a grid structure 21 of the support grid 11. All supporting struts 14 to 17 and 20, 21 are made of carbon fiber reinforced carbon (CFC) and are inserted into each other.
  • CFC carbon fiber reinforced carbon
  • the workpiece carrier 10 further comprises positioning devices 22 which are each formed from a support element 23 and a support element 24.
  • the support element 23 is made of graphite and the support element 24 consists of a ceramic fiber composite material.
  • the support element 23 is attached in each case to a support strut 19, wherein the support element 24 is attached to the support member 23.
  • the Fig. 3 shows a partial sectional view of a workpiece carrier 26, in which case a section orthogonal to positioning means 27 of the workpiece carrier 26 extends.
  • a support grid 28 of the workpiece carrier 26 is formed from support struts 29, 30, 31 and 32.
  • the support struts 29 to 32 are made of carbon fiber reinforced carbon (CFC) and are loosely plugged into each other.
  • the positioning devices 27 are formed from a support element 33 made of graphite and a support element 34 made of a ceramic fiber composite material.
  • the support members 33 each have a longitudinal groove 35, with which they are respectively attached to support struts 29.
  • the support element 34 is loosely placed on the support element 33 and nestles against a contact contour 36 of the support element 34.
  • a projecting collar 38 is formed at an upper end 37, which allows a suspension of the support element 34 in the support element 33, and thus a positive attachment. Nevertheless, an independent thermal expansion of the support element 34 of the support member 33 is possible.
  • a workpiece holder 39 is thus formed for turbine blades 41, which are shown here by way of example as workpieces 40.
  • the support elements 34 form a bearing surface 42 for the selective installation of the turbine blades 41.
  • a receiving contour 43 of a support element 34 accordingly corresponds substantially to the contact contour 36 of the support element 33.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Furnace Charging Or Discharging (AREA)
EP18160920.7A 2017-03-24 2018-03-09 Porte-pièce et procédé de fabrication Active EP3379189B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017205046.2A DE102017205046A1 (de) 2017-03-24 2017-03-24 Werkstückträger und Verfahren zur Herstellung

Publications (2)

Publication Number Publication Date
EP3379189A1 true EP3379189A1 (fr) 2018-09-26
EP3379189B1 EP3379189B1 (fr) 2019-09-04

Family

ID=61616923

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18160920.7A Active EP3379189B1 (fr) 2017-03-24 2018-03-09 Porte-pièce et procédé de fabrication

Country Status (3)

Country Link
US (1) US20180283791A1 (fr)
EP (1) EP3379189B1 (fr)
DE (1) DE102017205046A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019149676A1 (fr) * 2018-01-30 2019-08-08 Ald Vacuum Technologies Gmbh Dispositif pour assurer le soutien et le guidage d'écoulement de pièces métalliques et procédé de traitement thermochimique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018129446B4 (de) * 2018-11-22 2024-03-14 Saint-Gobain Industriekeramik Rödental GmbH Balken für Balkenförderofen
FR3099561B1 (fr) * 2019-07-30 2021-07-30 Bodycote Dispositif modulaire pour positionner des pièces métalliques lors d’opérations de traitement thermique.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10312802B3 (de) * 2003-03-21 2004-07-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Werkstückträger zum Wärmebehandeln von Werkstücken
DE202013011806U1 (de) 2013-05-08 2014-07-16 Kgt Graphit Technologie Gmbh Mehrteiliges Chargiergestell
DE102015205020A1 (de) * 2015-03-19 2016-09-22 Schunk Kohlenstofftechnik Gmbh Chargenträger

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL1636391T3 (pl) * 2003-06-13 2008-01-31 Schunk Kohlenstofftechnik Gmbh Nośnik dla części
DE202009010938U1 (de) * 2009-08-14 2009-10-29 Gtd Graphit Technologie Gmbh Verbesserter Werkstückträger

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10312802B3 (de) * 2003-03-21 2004-07-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Werkstückträger zum Wärmebehandeln von Werkstücken
DE202013011806U1 (de) 2013-05-08 2014-07-16 Kgt Graphit Technologie Gmbh Mehrteiliges Chargiergestell
DE102015205020A1 (de) * 2015-03-19 2016-09-22 Schunk Kohlenstofftechnik Gmbh Chargenträger

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PAPPU L.N MURTHY ET AL: "Probabilistic analysis of a SiC/SiC ceramic matrix composite turbine vane", COMPOSITES PART B, 1 January 2008 (2008-01-01), pages 694 - 703, XP055480692, Retrieved from the Internet <URL:https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20080006057.pdf> [retrieved on 20180604], DOI: 10.1016/j.compositesb.2007.05.006 *
SYLRAMIC(TM): "SYLRAMIC(TM) SiC FIBER", 1 January 2013 (2013-01-01), pages 1 - 2, XP055480691, Retrieved from the Internet <URL:http://www.coiceramics.com/pdfs/Sylramic.pdf> [retrieved on 20180604] *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019149676A1 (fr) * 2018-01-30 2019-08-08 Ald Vacuum Technologies Gmbh Dispositif pour assurer le soutien et le guidage d'écoulement de pièces métalliques et procédé de traitement thermochimique

Also Published As

Publication number Publication date
DE102017205046A1 (de) 2018-09-27
EP3379189B1 (fr) 2019-09-04
US20180283791A1 (en) 2018-10-04

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