EP2505950B1 - Support de pièce usinée et installation destinée au traitement d'objets - Google Patents

Support de pièce usinée et installation destinée au traitement d'objets Download PDF

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Publication number
EP2505950B1
EP2505950B1 EP12001573.0A EP12001573A EP2505950B1 EP 2505950 B1 EP2505950 B1 EP 2505950B1 EP 12001573 A EP12001573 A EP 12001573A EP 2505950 B1 EP2505950 B1 EP 2505950B1
Authority
EP
European Patent Office
Prior art keywords
workpiece carrier
foam
objects
cellular structures
carrier according
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
EP12001573.0A
Other languages
German (de)
English (en)
Other versions
EP2505950A1 (fr
Inventor
Herbert Schulze
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.)
Eisenmann SE
Original Assignee
Eisenmann 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 Eisenmann SE filed Critical Eisenmann SE
Publication of EP2505950A1 publication Critical patent/EP2505950A1/fr
Application granted granted Critical
Publication of EP2505950B1 publication Critical patent/EP2505950B1/fr
Not-in-force 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/14—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/26—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace on or in trucks, sleds, or containers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/12—Vehicle bodies, e.g. after being painted

Definitions

  • the invention relates to a workpiece carrier for conveying objects, in particular vehicle bodies, in systems for their thermal treatment, which has at least two support skids.
  • the invention further relates to a system for treating objects, in which the articles are conveyed through the system on at least one workpiece carrier, comprising a thermal process region, in which thermal energy is introduced into or out of the articles.
  • the aforementioned workpiece carriers are used, for example, to convey articles between and also in individual processing or treatment stations of a surface treatment plant.
  • the support skids of the workpiece carriers work together with conveying means, such as, for example, a belt conveyor or a roller conveyor, which are arranged along the conveying path through the system.
  • Such surface treatment plants are well known and are used for example in the DE 10 2004 056 404 A1 described, in which the support runners of the workpiece carrier are formed as hollow profiles.
  • Various treatment steps of such a system may include thermal processes in which the temperature of the conveyed items is changed.
  • the articles are often dried by heating. If necessary then the objects are cooled again for the following treatment steps. Depending on the complexity of the entire treatment chain, heating and cooling phases can occur repeatedly.
  • the objects to be treated also remain on a workpiece carrier during the treatment in the individual stations, so that the objects to be heated or cooled are always heated or cooled together with the workpiece carrier.
  • the process energy required for heating or cooling is thus regularly higher than it would actually be required for heating or cooling of the object alone.
  • FR 2 838 816 A1 a workpiece carrier, which is made in lightweight construction of a carbon fiber reinforced carbon with a 10% residual pore content and crossbars, which are laterally received in two U-shaped profiles and bolted to them. Despite its high stability, such a workpiece carrier has a lower mass, so that less process energy has to be used for heating or cooling.
  • the DE 34 21 365 C1 describes a tunnel open-top car in which different support beams of the recrystallized silicon carbide (SiC) carriage are used to reduce the mass to be heated.
  • the vessels such as crucibles for firing small-scale firewood in electric kilns.
  • the vessels comprise a foam body, which is formed from a mesh of hollow strands inside, so that a good heat transfer through the foam body is ensured. Supports lift the foam body from the bottom of the kiln to ensure good heat transport through the foam body from below.
  • the object is achieved by a workpiece carrier of the type mentioned, in which the support skids are at least partially formed of a material having cellular structures, wherein the material with cellular structures is a metal foam and / or a plastic foam and / or a ceramic foam ,
  • a defined amount of heat Q is required to change the temperature of an object by a certain amount.
  • the amount of heat required depends on the mass m of the object and the specific heat capacity Cp of the material that makes up the object.
  • the mass of the vehicle body is on average about 500 kg and that of the workpiece carrier about 250 kg.
  • one third of the process energy to be used is attributable to the heating or cooling of the workpiece carrier.
  • This process energy attributable to the workpiece carrier is now inventively reduced in that the mass m of the workpiece carrier is reduced while maintaining the necessary strength for the transport of the articles by the mass of the support runners of the workpiece carrier is reduced by the material with cellular structures.
  • Materials with cellular structures include, for example, cellular materials having foam, fiber, wire, hollow, honeycomb, and the like having open or closed cavities.
  • Such a material can achieve similarly high strengths as a solid material due to the mutually supporting webs of the cellular structures with less weight but higher space requirements.
  • the cellular structures can be provided along the entire support runner, but also only in particularly stressed areas.
  • the material with cellular structures is a metal foam, in particular an aluminum metal foam, and / or a plastic foam and / or a ceramic foam.
  • honeycomb structures or the like come into question according to the invention as cellular structures.
  • metal or plastic foams are particularly advantageous. These may have a modulus of elasticity 7-20 MPascal at densities of 0.6 g / cm 3.
  • the material has closed cavities as cellular structures.
  • Materials with closed cavities have higher strength than materials with open cavities, so that the required strengths for the runners are more easily accessible.
  • At least a portion of the support runners is formed as a composite component of a material having cellular structures and a solid material.
  • Such a composite component may for example be a hollow profile, which is thinner than the previously used hollow profiles for the formation of support runners, and which is to increase the strength with a cellular material, in particular a foam core, filled.
  • sandwich panels Another possibility of obtaining a composite component with a high strength are so-called sandwich panels, in which the cellular material is inserted between two solid material plates as straps.
  • the composite component of steel and aluminum metal foam in particular a at least partially foamed with aluminum metal foam hollow steel profile is.
  • Such a composite component can be processed by known steel construction technology and welded, for example, with other components of the workpiece carrier. Also, the foaming of a hollow steel profile with aluminum metal foam is particularly simple, so that the desired strength for the support runners can be achieved.
  • a wear-prone area of a component in particular a sliding surface and / or a workpiece holder, is provided with a wear-resistant material.
  • cellular structures generally have lower wear resistance than solid materials, areas exposed to wear, such as the sliding surfaces of the support runners, can be formed of a solid material. As a result, over the solid material or inside a hollow profile arranged cellular structures are protected.
  • the workpiece carrier is a skid for vehicle bodies.
  • the at least one workpiece carrier is a workpiece carrier according to one of claims 1 to 7.
  • the process area is a drying chamber.
  • FIG. 1 a skid 10 is shown on which a vehicle body provided with the reference numeral 12 in Figure 4 can be releasably attached.
  • the skid 10 provides a direction indicated by an arrow main transport direction 14, in which it is promoted for example by a surface treatment plant. Depending on the required movements in the surface treatment system, however, the skid 10 can be moved by lifting stations or the like also perpendicular to the main transport direction 14 or opposite thereto.
  • the skid 10 has two parallel support skids 16, which are interconnected via two transverse members 18.
  • Each support runner 16 carries two retaining arms 20 which protrude laterally beyond the support runners 16 perpendicular to the main transporting direction 14 and have mounting brackets 22 at their outermost ends.
  • the mounting brackets 22 together form a fastening device with which the vehicle body 12 can be releasably attached to the skid 10.
  • the retaining arms 20 and the mounting brackets 22 can be constructed structurally differently and adapted accordingly, in particular also be arranged on different sections of the support runners 16.
  • skids can be used to transport different vehicle bodies 12 or parts thereof.
  • Skid 10 for example, by placing a grid box, not shown on the mounting brackets 22 and any objects, especially loose items to transport.
  • the support runners 16 are connected via L-shaped bracket 24 with the crossbeams 18, which are arranged at the top of the support runners 16 facing inwards and upwards.
  • the crossbeams 18, which are designed as a hollow profile the support runners 16 are held parallel stable torsion.
  • the support arms 20 of the skid 10 have a horizontal support 26 of I-shaped cross-section pointing outwards from the support brackets 24, to which an obliquely upwardly and outwardly pointing oblique support 28 with likewise an I-shaped cross-section is attached.
  • a horizontal mounting plate 30 is arranged, which carries the mounting bracket 22 at one end.
  • the left-lying support runner 16a comprises a hollow profile 32 made of a solid material such as steel. Inside the hollow profile 32, the left support runner 16a has a honeycomb structure 34 as the core, which contributes as a cellular structure for stabilizing the hollow profile 32 and is made of aluminum, for example.
  • the honeycomb structure 34 can also run in the vertical direction, ie perpendicular to the conveying plane of the skids 10 (not shown).
  • the right-facing support runner 16b shows a hollow profile 32, which is made of steel, for example.
  • a foam core 36 is arranged in the hollow profile 32 as a cellular structure, which is made for example of aluminum foam.
  • the leftmost support runner 16c is constructed essentially of a foamed material 36, for example of an aluminum metal foam, without being enclosed by a hollow profile.
  • a wear-resistant tread 40 of a solid material for example, a hard steel arranged.
  • the right-hand support runner 16d is a variant of the support runner 16 made in sandwich construction.
  • a foam core 36 is arranged between a lower belt 42 and an upper belt 44.
  • honeycomb structure 34 can also be used in a sandwich construction, with preferably a vertically running honeycomb structure 34 being used.
  • a plastic or ceramic foam can be used as a cellular structure.
  • skids 10 may include a material having cellular structures 34, 36.
  • FIG. 4 shows a dryer with a drying tunnel 50, through which the vehicle body 12 is guided on the skid 10 by means of a conveyor system 52.
  • outlet nozzles 56 are provided for hot dry air, which are aligned with the vehicle body 12 according to their outer contour.
  • feed chambers 58 are arranged which feed the outlet nozzles 56 with the dry air.
  • the feed chambers 58 themselves are connected via a further partition wall 60, are provided in the hot filter 62, with Zu Kunststofftown 64, in which the heated dry air is introduced by a blower, not shown.
  • the hot filter 62 in front of the feed chambers 58 cause the dry air as dust-free as possible on the vehicle bodies to be dried 12 hits.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Laminated Bodies (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (9)

  1. Porte-pièces (10) muni d'au moins deux patins d'appui (16) et dévolu au convoyage d'objets (12), en particulier des carrosseries de véhicules, dans des installations destinées à leur traitement thermique,
    caractérisé par le fait que
    les patins d'appui (16) sont constitués, au moins en partie, d'un matériau à structures alvéolaires (34 ; 36), ledit matériau à structures alvéolaires (36) étant une mousse métallique et/ou une mousse de matière plastique et/ou une mousse céramique.
  2. Porte-pièces selon la revendication 1, caractérisé par le fait que le matériau à structures alvéolaires (36) est une mousse d'aluminium métallique.
  3. Porte-pièces selon la revendication 1 ou 2, caractérisé par le fait que le matériau comporte des cavités fermées en tant que structures alvéolaires (34 ; 36).
  4. Porte-pièces selon la revendication 3, caractérisé par le fait qu'au moins un tronçon des patins d'appui (16) est réalisé sous la forme d'une pièce structurelle composite en un matériau comprenant des structures alvéolaires (34 ; 36) et un matériau massif (32 ; 40 ; 42, 44).
  5. Porte-pièces selon la revendication 4, caractérisé par le fait que la pièce structurelle composite est constituée d'acier et de mousse d'aluminium métallique, en particulier d'un profilé creux (32) en acier garni, au moins en partie, de mousse d'aluminium métallique (36).
  6. Porte-pièces selon l'une des revendications précédentes, caractérisé par le fait qu'une région d'une pièce structurelle (16c ; 22) menacée d'usure, en particulier une surface de glissement (40) et/ou un logement (22) de pièces, est pourvue d'un matériau résistant à l'usure.
  7. Porte-pièces selon l'une des revendications précédentes, caractérisé par le fait que ledit porte-pièces (10) est un chevalet de transport dédié à des carrosseries (12) de véhicules.
  8. Installation destinée au traitement d'objets (12), lesdits objets (12) étant convoyés à travers ladite installation sur au moins un porte-pièces (10), incluant une zone (50) de traitement thermique dans laquelle de l'énergie thermique est cédée auxdits objets (12), ou extraite de ces derniers, caractérisée par le fait que le porte-pièces (10), à présence minimale, est un porte-pièces conforme à l'une des revendications 1 à 7.
  9. Installation selon la revendication 8, caractérisée par le fait que la zone de traitement (50) est une chambre de séchage.
EP12001573.0A 2011-03-30 2012-03-08 Support de pièce usinée et installation destinée au traitement d'objets Not-in-force EP2505950B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011015451A DE102011015451A1 (de) 2011-03-30 2011-03-30 Werkstückträger und Anlage zum Behandeln von Gegenständen

Publications (2)

Publication Number Publication Date
EP2505950A1 EP2505950A1 (fr) 2012-10-03
EP2505950B1 true EP2505950B1 (fr) 2017-08-30

Family

ID=45976592

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Application Number Title Priority Date Filing Date
EP12001573.0A Not-in-force EP2505950B1 (fr) 2011-03-30 2012-03-08 Support de pièce usinée et installation destinée au traitement d'objets

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EP (1) EP2505950B1 (fr)
DE (1) DE102011015451A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023100367A1 (de) 2023-01-10 2024-07-11 Audi Aktiengesellschaft Wärmebehandlungsanordnung mit einem Metallbauteil und einem Wärmebehandlungsgestell sowie entsprechendes Wärmebehandlungsgestell

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1906111A1 (de) * 1968-06-07 1970-02-05 Wissenschaftlich Techn Zentrum Einrichtung zur Minderung der Speicherwaerme,insbesondere von Tunnelofenwagen
DE3421365C1 (de) * 1984-06-08 1985-05-02 Ingenierbüro Schröder GmbH, 5410 Höhr-Grenzhausen Tunnelofen
JPS6237683A (ja) * 1985-08-09 1987-02-18 東芝セラミツクス株式会社 セラミツク焼成用道具
DE29512569U1 (de) * 1995-08-04 1995-11-30 Schunk Kohlenstofftechnik GmbH, 35452 Heuchelheim Träger für Härtegut
DE19737212A1 (de) * 1997-08-27 1999-03-04 Fraunhofer Ges Forschung Werkstückträger zum Wärmebehandeln von Werkstücken
FR2838816B1 (fr) * 2002-04-23 2004-05-28 Carbone Lorraine Composants Structure porteuse de charges, en materiau carbone, pour four a haute temperature
DE102004056404B4 (de) * 2004-11-23 2019-05-09 Dürr Systems Ag Trockner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
EP2505950A1 (fr) 2012-10-03
DE102011015451A1 (de) 2012-10-04

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