WO2020187597A1 - Bâti de chargement - Google Patents

Bâti de chargement Download PDF

Info

Publication number
WO2020187597A1
WO2020187597A1 PCT/EP2020/055938 EP2020055938W WO2020187597A1 WO 2020187597 A1 WO2020187597 A1 WO 2020187597A1 EP 2020055938 W EP2020055938 W EP 2020055938W WO 2020187597 A1 WO2020187597 A1 WO 2020187597A1
Authority
WO
WIPO (PCT)
Prior art keywords
carrier
fastening
support strip
cfc
cfc support
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.)
Ceased
Application number
PCT/EP2020/055938
Other languages
German (de)
English (en)
Inventor
Manfred Golling
Maximilian FROESCHL
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.)
SGL Carbon SE
Original Assignee
SGL Carbon SE
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 SGL Carbon SE filed Critical SGL Carbon SE
Publication of WO2020187597A1 publication Critical patent/WO2020187597A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/06—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
    • F16B5/0607—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other
    • F16B5/0614—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in angled relationship

Definitions

  • the present invention relates to a CFC support strip for a charging frame, a charging frame, and an easily removable carrier made of an inorganic, high-temperature-resistant material such as e.g. a ceramic support.
  • Metal workpieces e.g. Steel parts for motor vehicles are often processed on CFC charging frames because the carbon fiber reinforced carbon material (CFC) of the charging frames can withstand very high temperatures and is insensitive to strong temperature fluctuations.
  • CFC carbon fiber reinforced carbon material
  • the direct contact between the metal workpiece and the CFC material of the charging frame has proven to be disadvantageous. So it can e.g. when brazing steel parts for motor vehicles at temperatures in the range of 1500 ° C to carburization. This goes hand in hand with the undesired absorption of carbon in the steel parts, which changes the material properties of the steel in the areas that are in contact with the CFC material. High quality standards are then only met by part of the production batch, so that there is an unnecessarily large amount of waste or motor vehicles that are not entirely satisfactory in terms of quality.
  • the workpiece supports form a workpiece support area that is spaced upwards from the grate.
  • the workpiece supports are overlapped by grate elements so that they cannot be moved out of the grate level.
  • the workpiece supports are also essentially immobile within the grate level, so that they do not slip out of the grate level to the side can.
  • the workpiece carriers circumvent the problem of carburization. However, they do not prove to be entirely satisfactory.
  • the present invention is based on the object of enabling the high-temperature machining of metal workpieces so that as little thermal energy as possible is required for cooling and heating processes and the high-temperature machining can take place with the least possible downtimes and as little scrap as possible during machining accrues.
  • a CFC support strip for a charging rack comprising a plurality of fastening openings, each of which extends from a front side of the CFC support bar to a rear side of the CFC support bar, preferably at least two of the fastening openings to a first edge section of the CFC - Maintain the same distance between the support bar.
  • the openings are preferably between holding elements, e.g. Arranged grooves, which are used to attach support strips of a charging frame to the support strips.
  • CFC support strip is meant a strip formed from a carbon fiber reinforced carbon material. Your dimensions, e.g. Edge lengths are not subject to any particular restrictions. The person skilled in the art selects wider and / or thicker support strips if they are to be used to build a charging frame on which relatively heavy workpieces are to be processed. In contrast, he chooses narrower and / or thinner support strips if they are to be used to build a charging frame on which relatively light workpieces are to be processed.
  • each frame means that defines a surface on which the said high-temperature processing can take place, for example temperature processing at which temperatures of 1000 ° C to 2000 ° C occur, e.g. B. Temperatures in the range of 1250-1750 ° C, especially in the Be rich from 1400 ° C to 1600 ° C.
  • the high-temperature machining can be a brazing process, for example.
  • the term fastening opening is not subject to any particular restrictions, in particular not with regard to the dimensions of the fastening opening. Very thin, mechanically less resilient fastening elements that can be introduced into very small fastening openings can suffice if the high-temperature machining is to be carried out on very light workpieces.
  • the cross-section of at least two of the fastening openings is the same.
  • At least two fastening openings preferably have a gap-shaped cross section.
  • the length of the gap-shaped cross section is preferably at least 3 times, in particular at least 5 times, for example at least 7 times the width of the gap-shaped cross section. This is particularly preferred because fastening elements which are cut to size from CFC plate material, for example from the CFC plate material from which the CFC support strips are also made, can then be used particularly well.
  • At least two of the fastening openings adjoin a first one
  • the edge section of the CFC support strip the same distance.
  • at least these fastening openings have the gap-shaped cross section, the two opposite longer sides of the gap-shaped cross section then running parallel to the first edge section of the support strip.
  • the first edge section is preferably straight, but optionally interrupted by an optional groove. With certain support strips according to the invention, all of the fastening openings can also take up different distances from the first edge section.
  • the mounting holes are cut into the CFC material, e.g. through water jet cut.
  • the cut is generally orthogonal to the front and back of the CFC support strip.
  • the fastening opening edges run orthogonally to the front and to the rear of the CFC support strip, ie orthogonally to the surfaces of the CFC support strip defined by the front and the rear.
  • the CFC support strip preferably has a fastening element that can be introduced into a fastening opening.
  • the fastening element is preferably designed in such a way that it can protrude from the CFC support strip at the front and rear when it is inserted.
  • the fastening element can have an external thread, which engages in an internal thread introduced on the fastening opening edges. The fastening element then usually only protrudes from the CFC support strip at the front or the rear, depending on how far it is
  • a fastening element comprising a carbon fiber reinforced carbon material is particularly preferred.
  • the fastening element can comprise all materials that are mechanically sufficiently stable and withstand the conditions of high-temperature processing.
  • the fastening element can e.g. be cut from CFC sheet material.
  • At least one section of the fastening element rests positively on at least part of the fastening opening edges when the fastening element is introduced into a fastening opening.
  • the cross-section of the section of the fastening element can be essentially the same as the cross-section of the fastening opening, so that the fastening element that is introduced rests positively on the fastening opening edges all around.
  • the fastening element can also be a protruding section of the CFC support strip itself. Projecting means that the section protrudes beyond the contours of the support bar, which are delimited by the front and back of the support bar and by the two edges of the support bar, where the front and back of the support bar merge. It can therefore be a portion of the CFC support strip protruding over an edge of the CFC support strip or a portion of the CFC support strip protruding from a surface of the CFC support strip.
  • the CFC support strip has a carrier made of an inorganic, high-temperature-resistant material, in particular one
  • Ceramic carrier for example a silicon carbide ceramic carrier.
  • the carrier has at least one carrier fastening opening which is used to fasten the carrier to the CFC support strip via the fastening element, the carrier fastening opening extending through from a front side of the carrier to a rear side of the carrier.
  • at least one section of the fastening element is preferably in a form-fitting manner against at least part of the edges of the carrier fastening opening when the fastening element is introduced into the carrier fastening opening.
  • the cross sections of the carrier attachment opening and the attachment opening are preferably essentially the same.
  • a fastening element preferred according to the invention has at one end a head region which prevents the head region from slipping into the fastening opening or into the carrier fastening opening.
  • the head area can be formed by two projections, e.g. as shown in FIG.
  • the fastening element preferably comprises a receptacle for an anti-slip element at one (opposite) end.
  • the distance of the recording from the head area is then e.g. so matched to the thickness of the CFC support strip and the thickness of the support that a form-fitting fit of the support on the CFC support strip is ensured when the anti-slip element is included.
  • the carrier is pressed against the CFC support strip when the anti-slip element is received in the receptacle.
  • the anti-slip element can be a locking element, in particular one of the locking elements described in the German utility model DE 20 2010 015 436 U1. Reference is hereby expressly made to the contents of the German utility model DE 20 2010 015 436 U1.
  • the CFC support strip according to the invention preferably comprises a holding element in a section of the CFC support strip located between fastening openings, the Hal teelement preferably being a groove for receiving an insertion section of a support strip.
  • One object of the invention is a charging frame which has a plurality of CFC support strips according to the invention which are arranged in parallel and which are connected via support strips.
  • Another object of the invention is a carrier made of an inorganic, high temperature resistant material, in particular a ceramic carrier, e.g. a
  • Silicon carbide ceramic carrier having at least one carrier attachment opening for Fastening of the carrier to the CFC support strip via the fastening element, the carrier fastening opening extending through from a front side of the carrier to a rear side of the carrier.
  • the ceramic supports specified herein are preferably selected from silicon carbide ceramic supports.
  • a silicon carbide ceramic carrier is understood to mean a carrier which contains silicon carbide.
  • the silicon carbide ceramic supports are obtainable by a process in which the shape of the silicon carbide ceramic support is formed by additive manufacturing, e.g. 3D printing, is defined from a powder comprising silicon carbide particles and / or carbon particles.
  • the silicon carbide can then be formed in a known manner by infiltration of liquid silicon and / or by CVD.
  • WO 2017/089494 A1 for 3D printing of ceramic components. Since the carriers are typically required in relatively small numbers in connection with the invention, additive manufacturing is particularly economical.
  • the carriers described herein may have a protruding support element on the front or rear thereof, e.g. a paragraph. With the support element, the carrier sits in the assembled state on the first edge section of the CFC support strip of the charging frame, so that a force exerted by a workpiece on the carrier is at least partially transferred directly from the carrier to the edge section. This means that thinner or narrower, less torsion-resistant and thus particularly cost-effective CFC support strips can be installed.
  • FIGS. 1 to 7 The invention is illustrated by FIGS. 1 to 7 without being restricted thereto.
  • FIG. 1 shows a CFC support strip according to the invention for a charging frame
  • FIG. 2 shows an enlarged section of the CFC support strip shown in FIG.
  • FIG. 3 shows a CFC support strip according to the invention for a charging frame, with fastening element, ceramic carrier and anti-slip element
  • FIG. 4 shows a further CFC support strip according to the invention for a charging rack
  • FIGS 5A, B and C show a ceramic support according to the invention
  • FIG. 6 shows a charging frame according to the invention from above
  • FIG. 7 shows a detail of a perspective view of that shown in FIG.
  • the CFC support strip 10 shown in FIG. 1 for a charging frame comprises a plurality of fastening openings 11, each of which extends from a front side 12 of the CFC support strip 10 to a rear side of the CFC support strip 10, with at least two of the fastening openings 11 Maintain the same distance Da from a first edge section 10a of the CFC support strip 10. From Fig. 1, 2 it can be clearly seen that the cross section of at least two of the fastening openings 11 is the same.
  • the fastening opening edges 14 run orthogonally to the front and to the rear of the CFC support strip. In the views of FIGS. 1, 2 and 4, they run exactly towards the viewer. In Fig. 1 and 4, reference numeral 14 therefore each indicated the front edge of the fastening opening edges.
  • the first edge section 10a is straight.
  • the straight edge section 10 a is interrupted by the groove 15.
  • the groove 15 is used to receive an insertion section of a support strip.
  • FIG. 3 shows a fastening element 20 which can be introduced into the fastening opening 11 and a ceramic carrier 30, e.g. is a ceramic carrier produced by casting in a mold or is a silicon carbide ceramic carrier produced by 3D printing from a carbon-based powder and infiltration with liquid silicon.
  • the fastening element consists of carbon fiber reinforced carbon material.
  • the cross section of a section of the fastening element 20 corresponds to the cross section of the carrier fastening opening 31, so that the section of the
  • Fastening element 20 is firmly seated in the carrier fastening opening 31 and is in a form-fitting manner all around. There is therefore at least a section of the fastening element 20 positively on the edges of the carrier fastening opening 31 when the fastening element 20 is introduced into the carrier fastening opening 31. In Fig. 3 it cannot be seen that the cross-section of the fastening opening 11 also coincides with the two aforementioned cross-sections. A portion of the fastening element 20 is therefore also in a form-fitting manner against the fastening opening edges 14 when the fastening element 20 is introduced into a fastening opening 11.
  • the ceramic carrier 30, which is shown even more clearly in FIGS. 5A to C, has at least one carrier fastening opening 31 for fastening the carrier to the CFC support strip via the fastening element.
  • the carrier attachment opening 31 extends from a front side 32 of the carrier 30 to a rear side 33 of the carrier 30.
  • the ceramic carrier 30 has a workpiece support surface 34.
  • the distance that the workpiece support surface 34 maintains from the carrier attachment opening 31 is greater than the distance D-a. This ensures that a workpiece lying on workpiece support surfaces does not come into contact with the CFC material of the charging frame.
  • the carriers according to the invention can also have projections 35 which secure a workpiece against slipping.
  • the carrier 30 shown here has a shoulder 36 on the rear side. With the shoulder 36, the carrier sits in the assembled state on the first edge section 10a of the CFC support strip 10 of the charging frame, so that a force exerted by a workpiece on the carrier is at least partially also directly from the carrier to the edge section 10a is removed.
  • the fastening element 20 has a head region 22 at one end 21, which prevents the head region 22 from slipping into the fastening opening 11 or into the carrier fastening opening 31. It can also be clearly seen that the fastening element 20 comprises a receptacle 24 for a slip protection element 40 at one end 23. The distance of the receptacle 24 from the head region 22 is matched to the thickness of the CFC support strip 10 and the strength of the carrier that a form-fitting fit of the carrier on the CFC support bar 10 is ensured when the anti-slip element 40 is received.
  • the charging frame 1 shown in FIG. 6 has a plurality of CFC support strips 10 which are arranged in parallel and are connected via support strips 50.
  • FIG. 7 shows a section of a perspective view of this charging frame.
  • the charging racks that can be manufactured according to the invention enable particularly efficient high-temperature processing, e.g. by brazing (e.g. joining several individual parts at temperatures up to 1500 ° C).
  • the charging frame holds the individual workpiece parts during the soldering process without distortion in relation to one another, even at these high temperatures, so that the geometry of the finished soldered workpiece is always the same and corresponding tolerances are maintained. This means that very little scrap is achieved during high-temperature machining.
  • Silicon carbide ceramic carriers are used to hold the workpiece to be soldered, to hold it securely in position during the process and at the same time to protect it from carburization by the carbon-containing charging frame.
  • the inventive connection of the carrier with the charging frame enables a particularly filigree, material-saving design of the CFC carrier grid.
  • the carriers are attached to carrier strips that are already present without the need for CFC struts or other CFC components to be installed in the charging frame. Thanks to this design, the ceramic carriers can be easily exchanged in the event of a break, without the charging frame having to be dismantled to replace the carrier.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
  • Furnace Charging Or Discharging (AREA)

Abstract

La présente invention concerne une barre porteuse CFC (10) pour un bâti de chargement (1), comprenant une pluralité d'ouvertures de fixation (11), dont chacune s'étend depuis un côté avant (12) de la barre porteuse CFC (10) jusqu'à un côté arrière de la barre porteuse CFC (10), au moins deux des ouvertures de fixation (11) maintenant de préférence la même distance (D-a) par rapport à une première partie de bord (10a) de la barre porteuse CFC (10).
PCT/EP2020/055938 2019-03-15 2020-03-05 Bâti de chargement Ceased WO2020187597A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019203594.9A DE102019203594A1 (de) 2019-03-15 2019-03-15 Chargiergestell
DE102019203594.9 2019-03-15

Publications (1)

Publication Number Publication Date
WO2020187597A1 true WO2020187597A1 (fr) 2020-09-24

Family

ID=69941313

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/055938 Ceased WO2020187597A1 (fr) 2019-03-15 2020-03-05 Bâti de chargement

Country Status (2)

Country Link
DE (1) DE102019203594A1 (fr)
WO (1) WO2020187597A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007132276A1 (fr) * 2006-05-11 2007-11-22 Imerys Magyarország Tüzállóanyaggyártó KFT Ensemble céramique
DE202010015436U1 (de) 2010-11-16 2011-01-27 Sgl Carbon Se Verriegelungselement, CFC-Bauteil und Halterungseinrichtung
DE102009037293B4 (de) 2009-08-14 2013-05-23 Gtd Graphit Technologie Gmbh Verbesserter Werkstückträger
DE102012218491A1 (de) * 2012-10-10 2014-04-10 Sgl Carbon Se Werkstückträger
DE202013011806U1 (de) * 2013-05-08 2014-07-16 Kgt Graphit Technologie Gmbh Mehrteiliges Chargiergestell
WO2017089494A1 (fr) 2015-11-24 2017-06-01 Sgl Carbon Se Fabrication additive d'un élément céramique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1240204A (en) * 1969-08-12 1971-07-21 Acme Marls Ltd Improvements relating to supports for pottery and the like articles during firing and like heat treatment
FR2584805B1 (fr) * 1985-07-12 1989-07-13 Elect Meca Et Const Perfectionnement aux installations de sechage et de cuisson de produits ceramiques
DE10312802B3 (de) * 2003-03-21 2004-07-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Werkstückträger zum Wärmebehandeln von Werkstücken
DE502004004737D1 (de) * 2003-06-13 2007-10-04 Schunk Kohlenstofftechnik Gmbh Träger für Bauteile

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007132276A1 (fr) * 2006-05-11 2007-11-22 Imerys Magyarország Tüzállóanyaggyártó KFT Ensemble céramique
DE102009037293B4 (de) 2009-08-14 2013-05-23 Gtd Graphit Technologie Gmbh Verbesserter Werkstückträger
DE202010015436U1 (de) 2010-11-16 2011-01-27 Sgl Carbon Se Verriegelungselement, CFC-Bauteil und Halterungseinrichtung
DE102012218491A1 (de) * 2012-10-10 2014-04-10 Sgl Carbon Se Werkstückträger
DE202013011806U1 (de) * 2013-05-08 2014-07-16 Kgt Graphit Technologie Gmbh Mehrteiliges Chargiergestell
WO2017089494A1 (fr) 2015-11-24 2017-06-01 Sgl Carbon Se Fabrication additive d'un élément céramique

Also Published As

Publication number Publication date
DE102019203594A1 (de) 2020-09-17

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