EP2832464B1 - Élément lamellaire et procédé de fabrication d'un élément lamellaire - Google Patents

Élément lamellaire et procédé de fabrication d'un élément lamellaire Download PDF

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Publication number
EP2832464B1
EP2832464B1 EP14179522.9A EP14179522A EP2832464B1 EP 2832464 B1 EP2832464 B1 EP 2832464B1 EP 14179522 A EP14179522 A EP 14179522A EP 2832464 B1 EP2832464 B1 EP 2832464B1
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EP
European Patent Office
Prior art keywords
lamella
pressing force
lamellar element
lamella element
lamellar
Prior art date
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EP14179522.9A
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German (de)
English (en)
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EP2832464A1 (fr
Inventor
Clemens David
Rupert Jäger
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DBK David and Baader GmbH
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DBK David and Baader GmbH
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Publication of EP2832464A1 publication Critical patent/EP2832464A1/fr
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Classifications

    • 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
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/022—Making the fins
    • 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
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/08—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by combined methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0435—Structures comprising heat spreading elements in the form of fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins

Definitions

  • the invention is based on a lamellar element according to the preamble of claim 1 and a method for producing a lamellar element according to the preamble of claim 7.
  • Such a lamella element and such a method are in the JP-A-H09280754 disclosed.
  • heating devices are used to heat an interior and an engine of the motor vehicle.
  • heating devices are also suitable for other purposes in a wide range of applications, for example in the field of domestic installations (air conditioning), industrial plants and the like.
  • Such heating devices in particular those with PTC heating elements (positive temperature coefficient, positive temperature coefficient, PTC thermistor), usually have lamellar elements that are used to dissipate heat. The heat dissipation of the lamellar elements is supported by an air current flowing around the lamellar elements, which is generated by a fan.
  • a heating device with lamellar elements or corrugated fin elements is known.
  • a respective lamella element has a multiplicity of lamellas which are connected to one another via lamella arches or connecting sections. Fin arches of one side of the fin element are attached to a radiator panel.
  • the lamellar element is held in its longitudinal direction via the radiator sheet.
  • the lamellar element is fixed in position with the radiator sheet, both in its longitudinal and in its transverse direction. As a result, it can be mounted in the heating device comparatively easily.
  • a disadvantage of this solution is that an additional component, namely the radiator sheet, is required to fix the position of the lamellar element.
  • the invention is based on the object of creating a lamellar element that can be produced easily and inexpensively, has a simple design in terms of device technology and is easy to assemble.
  • a further object of the invention is to provide a simple and inexpensive method for producing such a lamellar element.
  • the object is achieved with regard to the lamella element according to the features of claim 1 and with regard to the method according to the features of claim 7 .
  • a lamellar element or a corrugated rib is designed as a meandering curved strip. Seen in the strip direction, the slat element alternately has a connecting section for connecting two slats and one slat.
  • the lamellar element is preferably subjected to a pressing force for plastic deformation of at least the force-loaded connecting sections via a plurality of connecting sections or via all connecting sections or essentially all connecting sections.
  • lamellae of at least a subset of the lamellae or all lamellae are provided with one or more beads.
  • the application of the pressing force results in the rigidity of the lamellar element being significantly increased. It is thus possible, for example, to dispense with the radiator sheet provided in the prior art explained at the beginning or with soldering of the connecting sections in order to form the lamellar element easy to assemble. Such an increase in rigidity thus leads to better handling of the lamellar element and accordingly to easier assembly.
  • the lamellar element is prevented from "jumping open”. Introducing beads into slats also leads to a significant increase in the rigidity of the slat element. If a lamellar element is subjected to a pressing force during manufacture and if it also has beads, this combination leads to an exceptionally high level of rigidity.
  • a partial area is plastically deformed in each case in the connection sections subjected to a pressing force by the application of the pressing force, with the result that the remaining area can essentially remain in its original shape.
  • the entire connecting section does not have to be deformed in order to achieve sufficiently high rigidity of the lamellar element. Since the entire connection section is not deformed, manufacture of the lamellar element is also simplified. Furthermore, it has been shown that such a configuration is particularly well suited for a continuous production process of the lamellar element, in which this is simply guided through a tool with a tapering opening, which is designed such that only the partial areas are deformed. The pressing forces that occur as a result are comparatively low.
  • the partial area of a connecting section is preferably a free edge area.
  • both edge regions of a respective connecting section subjected to a pressing force are plastically deformed, which further increases rigidity and enables symmetrical stiffening of the lamellar element.
  • a respective connection section to which a pressing force is applied can be configured in an arc shape between its edge regions, viewed in cross section.
  • the connecting section can thus, for example, retain its original shape in its middle area, which means that a maximum height of the lamellar element is a height of known heights that are not subjected to a pressing force Corresponds to lamellar elements.
  • the dimensions from the prior art can essentially be retained, with the result that a heating device which uses these lamellar elements does not have to be redesigned.
  • a respective formed edge area is simply flattened, with which the associated tool can be easily configured.
  • All connecting sections are preferably plastically deformed.
  • the application of the pressing force to the lamellar element during production can result in a planar surface in the region of its connecting sections, with which unevenness can be compensated for.
  • This is extremely advantageous for attaching PTC heating elements, for example, since a contact or contact surface between the PTC heating elements and the lamellar element is essentially flat. This also creates high electrical conductivity and high thermal conductivity between the PTC elements and the lamellar element.
  • Two functional sides of the lamella element which are spaced apart from one another and between which the lamellas are arranged are preferably formed with the connecting sections, in particular in all of the embodiments.
  • the pressing force is applied to it from both functional sides simultaneously from the outside.
  • the lamellar element can be subjected to a further force during production in the longitudinal direction, in particular a holding force for holding the lamellar element or a pressing force for upsetting the lamellar element.
  • This additional force is then directed approximately in a direction running parallel to the functional sides. It has been shown that this measure can further increase the rigidity of the lamellar element and/or the lamellar element can be held securely during production.
  • a distance between the Connecting portions of the function pages are reduced, so that the lamellar element has a compact design.
  • At least the connecting sections are plastically deformed by the application of the pressing force applied via the connecting sections.
  • connection sections are deformed by the application of the pressing force from a curved shape into a shape that is flat at least in sections.
  • the crests connecting the slats are leveled.
  • Compression of the connecting sections can be between 0.2 and 0.5 mm, for example, as a result of the pressurizing force being applied via the connecting sections.
  • a radius can be provided in the transition area between a respective connecting section and the lamella connected to it.
  • a receiving space is formed between adjacent connecting sections, in which adhesive can be displaced when gluing, for example, PTC heating elements to the lamellar element. This enables better current introduction and optimizes production.
  • a lamella together with its two connecting sections, preferably has an approximately Z-shape as seen in a flow direction of the lamella element.
  • the slats connected to one another via a connecting section are preferably brought closer together with their end sections remote from the connecting section. Additionally or alternatively, the end sections can rest against one another. By approaching each other or abutting end portions of the slats can be introduced beads of each adjacent slats dive into each other in sections, whereby the slats then overlap each other via their beads. This leads to additional stability of the lamellar element.
  • At least the lamellae of the subset or all lamellae have three beads. These can be configured approximately the same. Furthermore, they can extend over a large part of the lamella.
  • a first bead is introduced from their one side surface and a second bead or two second beads are introduced from their other side surface.
  • a respective bead preferably extends somewhat parallel to a longitudinal edge of its lamella. This configuration and arrangement of the beads has proven to be extremely advantageous in order to increase the rigidity of the lamellar element.
  • the beads can each be elongate in a simple manner in terms of device technology and, for example, be spaced somewhat from the connecting sections. If there are a plurality of beads in a lamella, these are then approximately at a parallel distance from one another. A distance between the beads is preferably essentially the same. It is conceivable that with three beads, the middle bead shares its longitudinal flanks with the side beads.
  • two lateral beads are introduced from one side surface and a central bead is introduced into this from the other side surface.
  • the beads are preferably designed in such a way that a flow cross section between two adjacent lamellae, viewed in the direction of flow, remains essentially the same. This means that in a plane which extends through the slats approximately parallel to the functional sides of the slat element, there is a distance between any two adjacent slats is substantially the same. This avoids a pressure loss when a fluid flows through the lamellar element.
  • the beads are preferably placed in approximately the same position for each lamella. Bulges from beads in the same position then have the same orientation.
  • the flow cross-section in the direction of flow of the fluid between two adjacent lamellas thus remains essentially the same due to the beads of the lamellar element being configured and arranged essentially the same way.
  • a lamellar element can be produced with a few simple method steps, which has a high degree of rigidity and therefore, in contrast to the prior art, does not require any additional radiator sheet metal or soldering of connecting sections.
  • the connecting sections of a respective side of the lamellar element are successively subjected to the pressing force in the direction of the lamellae, which leads to continuous production would lead. It is also conceivable that in each case at least two opposing connecting sections can be acted upon by the pressing force at about the same time. This continuous production takes place, for example, via two rollers between which the lamellar element is passed after it has been formed into a corrugated rib. Or a tool can be provided with an opening that tapers in the direction of passage.
  • the band is preferably embossed before it is laid to form the corrugated rib.
  • the strip is deformed in such a way that the connecting sections are curved at least in sections before the lamellar element is subjected to the pressing force. Viewed in the direction of the strip, the connecting sections thus each extend approximately along a curve.
  • the pressing force is then applied via the connecting sections, preferably in such a way that the curved connecting sections are flattened and the lamellar element is thus leveled.
  • the force acting in the longitudinal direction on the lamellar element is a holding force which is applied before and/or approximately at the same time as the pressing force is applied to the lamellar element.
  • the lamellar element can be longitudinally fixed by the holding force and then pressed over the connecting sections or the lamellar element can be pressed together in the longitudinal direction and held (fixed) in its defined length and then pressed over the connecting sections.
  • a tool for producing the lamella element is then suitably fixed in the end position before the pressing force is applied via the connecting sections.
  • the lamellar element can be transversely fixed before and/or at the same time as the pressing force is applied from both sides.
  • the transverse fixation takes place in the transverse direction, ie approximately in the flow direction of the lamellar element or in the direction of the width defined by the lamellar element.
  • the transverse fixation prevents the compressed lamellar element from “jumping out laterally” from the production tool.
  • a heating element in particular a PTC heating element, can be arranged at least on one functional side of the lamellar element.
  • the heating element is preferably glued or clamped to the lamellar element.
  • a tool for producing a lamellar element is provided according to one of the preceding aspects, the tool not relating to the subject matter of the present invention but serving as an example solely to explain it.
  • the tool preferably has a one-piece or multi-piece tool body with an opening through which the lamellar element can be passed for forming, wherein an opening cross section of the opening is designed such that the lamellar element is subjected to a pressing force when it is carried out.
  • the tool allows the sides of the lamellar element to be continuously depressed and stiffened.
  • the tool can be designed, for example, as a kind of four-sided draw key.
  • rollers for shaping the lamellar element are provided.
  • the tool is preferably arranged at the end of a continuous production of the lamellar element.
  • the opening has one or more edges--extending, for example, in one plane--for reshaping the partial areas of the lamellar element.
  • the opening for each partial area of the lamellar element to be formed can have a wedge surface extending approximately in the longitudinal direction for the constant application of a pressing force.
  • the opening preferably extends along a longitudinal direction, with a cross section of the opening seen in the longitudinal direction becoming smaller or tapering (in particular through the wedge surfaces).
  • the opening is preferably designed in such a way that the lamellar element passed through the through-hole rests (preferably only) with its partial areas to be deformed against the one wedge surface or the plurality of wedge surfaces of the opening during the application of the pressing force.
  • the tool has wedge surfaces or edges for the entire reshaping of the connecting section according to the further embodiment of the lamellar element.
  • Two, three or four wedge surfaces or edges are preferably provided in order to correspondingly reshape two, three or all of the corner regions of the lamellar element.
  • the lamellar element 1 is configured in a meandering shape. It is made from a laid strip, with a lamella 2 and a connecting section 4 being formed alternately in the direction of the strip.
  • the connecting sections 4 of the lamellar element 1 then form a first and second functional side 6 and 8 of the lamellar element 1.
  • the lamellar element 1 is designed such that the respective end sections 10a, 10b of two adjacent lamellae 2a, 2b, which are spaced apart from the connecting section 4 of these lamellae 2a, 2b, abut one another or are at least approximated. Adjacent slats 2a, 2b thus approach one another, starting from their connecting section 4.
  • the lamellar element 1 is subjected to a flat pressing force from both functional sides 6 and 8 via its connecting sections 4 , which acts approximately normal to the functional sides 6 and 8 .
  • the connecting sections 4 are plastically deformed and each have a flat section 14 having an approximately planar outer surface 12.
  • the outer surfaces 12 of the connecting sections 4 on a respective functional side 6 or 8 then each span a plane.
  • the flat sections 14 each extend over the entire width of the lamellar element 1 viewed in a flow direction 16 .
  • a width of the flat sections 14 seen transversely to the direction of flow 16 is in essentially constant.
  • a respective slat 2 is connected to its respective connecting section 4 via a curved section 18a or 18b.
  • a respective curved section 18a and 18b extends from the flat section 14 to the respective end section 10b or 10a of the slats 2a or 2b. Due to the curved sections 18a and 18b, starting from the flat section 14 towards the lamellae 2, a receiving space 20 is formed between two adjacent connecting sections 4a and 4b. If, for example, a PTC heating element is attached to the functional side 6 and/or 8 via an adhesive, this adhesive can be displaced into the receiving spaces 20 between the connecting sections 4 .
  • each lamella 2 three beads 22, 24 and 26 are introduced. These are each elongate and extend at a parallel distance from the longitudinal edge 28 of the lamella 2 in which they are introduced.
  • the beads 22 to 26 are spaced apart from one another. Alternatively, it is conceivable that adjacent beads 22 to 26 of a lamella 2 share their longitudinal flanks 30a to 30d. In the present exemplary embodiment, the beads 22 to 26 are evenly spaced apart from one another as viewed in the direction of flow 16 .
  • the beads 22 and 26 are introduced in an outer area of the lamella 2 and the bead 24 is formed between these beads 22 and 26 in the middle of the lamella 2 .
  • a distance between the beads, viewed in the flow direction 16, corresponds approximately to the distance between the outer beads 22 and 26 and their adjacent longitudinal edge 28 or 32.
  • the beads 22 to 26 preferably end in front of the connecting section 4 of their lamella 2. However, it is conceivable that the beads 22 to 26 extend into one or both connecting sections 4 of their lamella 2. Furthermore, it is conceivable that they also extend into one or both flat sections 14 of the connecting section 4 of their lamella 2 .
  • the two outer beads 22 and 26 of a respective lamella 2 are introduced from a first side face 34 and the middle bead 24 from the other side face 36 .
  • the beads 22 and 26 thus have a bulge which is oriented approximately in the opposite direction to the bulge of the central bead 24 .
  • Each bead 24 has a bead base 38.
  • Longitudinal flanks 30b and 30c extend from this in an approximately V-shape relative to one another, with their spacing increasing as the distance from bead base 38 increases.
  • the bead 24 has two transverse flanks 40a and 40b, which also extend in a V-shape towards one another, starting from the bead base 38, with their spacing increasing as the distance from the bead base 38 increases.
  • the adjacent longitudinal and transverse flanks 30b, 30c, 40a, 40b are each connected to one another via a curved flank 42.
  • the beads 22 and 26 are thus each designed approximately in the shape of a bowl.
  • the beads 22 and 26 of a respective lamella 2 are configured essentially the same and are also positioned in the same way on the respective lamellas 2 .
  • the beads 22 to 26 of one lamella 2a can partially dip into the beads 22 to 26 of the other lamella 2b.
  • a relative displacement of the lamellae 2a and 2b, in particular in the direction of flow 16, is thus made more difficult, as a result of which the rigidity of the lamellar element 1 is increased.
  • FIG 3 shows the lamellar element 1 before it is subjected to a pressing force via its connecting sections 4 .
  • the connecting sections 4 are each configured in a curved manner. Viewed in cross-section, they each extend approximately partially around a circle.
  • the beads 22 to 26 for each lamella 2 are introduced into a band which consists in particular of metal, preferably aluminum or an aluminum alloy. This is done, for example, by an embossing process. Then the band is bent, so that it is then about the configuration according to the Figures 3 and 4 having.
  • the lamellar element 1 has an extremely high rigidity in comparison to a lamellar element without beads. The rigidity can be further increased if the lamella element 1 from its functional pages 6 and 8, see figure 4 , flat with a Pressing force is applied, whereby the connecting portions are plastically deformed and according to the shape figure 2 reach.
  • Pressing forces 44 and 46 are directed approximately transversely to the direction of flow 16 and point toward one another.
  • the pressing forces 44 and 46 are applied to the lamellar element, it is stretched in the longitudinal direction via its end faces 48 and 50 according to FIG figure 3 applied in order to avoid drifting apart of the lamellae 2 when the pressing forces 44 and 46 are applied.
  • the lamellar element 1 can also be compressed via the end faces 48 and 50, ie plastically deformed in the longitudinal direction.
  • a lamellar element arrangement 52 is shown. This has at least one lamella element 1 which is firmly connected to heating elements 54 to 58 .
  • the lamellar element arrangement 52 has a further lamellar element 1a.
  • the PTC heating elements 54 to 58 are then over their large areas with a respective functional page 6, 8, see figure 1 , The lamella element 1 or 1a connected.
  • adhesive is applied to the large areas of the PTC heating elements and/or to the functional sides 6, 8 of the lamellar elements 1, 1a to be connected to them and then the parts 54 to 58, 1 and 1a to be connected are arranged relative to one another. Excess adhesive can then in the receiving spaces 20, of which in the figure 5 by way of example, two are provided with a reference number.
  • a sectional plane of the breakout extends approximately parallel to the functional side 6 or 8 of the lamellar element 1 through the middle thereof. It can be seen here that in a plane that extends parallel to the functional sides 6 and 8 and intersects the lamellae 2, a distance between two adjacent lamellae 2a, 2b remains essentially the same, which in turn means that the flow cross-section between two adjacent lamellae 2a and 2b is essentially remains the same. This takes place in that the beads 22 to 26 of a respective lamella are configured essentially the same and also essentially are positioned the same with respect to their lamella. This configuration is advantageous for achieving a low differential pressure during operation (with flow).
  • a tool 60 for applying the pressing forces to the lamellar element 1 is shown as an example.
  • the tool 60 has two tool parts 62 and 64 that are L-shaped when viewed in cross section.
  • Each tool part 62 and 64 has a first leg 66 and a second leg 68.
  • the lamellar element 1 then lies with its one functional side 6 on the leg 66 of the a tool part 62 and with its other functional side 8 on the leg 66 of the other tool part 64.
  • a respective leg 66 has an approximately flat contact surface 70 which is designed in such a way that the lamellar element can rest against these contact surfaces 70 essentially with its entire functional side 6 or 8 .
  • the lamellar element 1 rests with its one end face 48 on the leg 68 of one tool part 62 and with its other end face 50 on the leg 68 of the other tool part 64 .
  • the legs 68 each have a contact surface 72 extending approximately perpendicularly to the contact surface 70 of their respective tool part 62 or 64.
  • the contact surfaces 72 are designed in such a way that the end faces 48 and 50 of the lamellar element 1 can bear against them over a large area.
  • the tool parts 62 and 64 are spaced apart from one another in such a way that they do not touch during the forming process of the lamellar element 1 . In order to shape the lamellar element 1, the tool parts 62 and 64 are then moved towards one another.
  • the legs 66 of the tool parts 62 and 64 are displaced relative to one another such that a distance between them is reduced.
  • the legs 68 are displaced relative to one another in such a way that a distance between them is reduced in order to upset the lamellar element 1 .
  • the legs 68 maintain a constant spacing, as a result of which they only support the lamellar element 1 during the forming process via the legs 66 . In the latter case, it is conceivable that the lamellar element 1 is compressed by the legs 66 before it is supported.
  • the tool 60 or the tool parts 62 and 64 can have corresponding contact surfaces.
  • the lamellar element 1 has connecting sections 4 which are only partially plastically deformed. This simplifies production of the lamellar element 1 .
  • the lamellar element 1 has beads 22, 24 and 26.
  • the deformed partial areas of the lamella element are the edge areas 74, 76 of a respective connecting section 4, which are exposed.
  • the edge areas 74, 76 are pressed flat or essentially flat.
  • the two diametrical edge regions 74, 76 of a respective connecting section 4 are arranged in an approximately V-shape with respect to one another.
  • the remaining respective area of the connecting portion 4 which is not flattened has an arcuate shape in cross section.
  • a tool 78 for producing the lamellar element 1 with the deformed edge regions 74, 76 is shown.
  • the tool 78 has a tool body 80 with two tool shells 82 and 84 which together define an octagonal opening 86 .
  • the opening 86 has four edges 88 to 94, via which the lamellar element 1 is plastically deformed.
  • the symmetrically arranged edges 88 to 94 are each in a corner area of the opening 86. If the lamellar element 1 is guided through the opening 86, the edges of the lamellar element 1 and thus the edge areas 74 and 76 of the connecting sections 4 become plastic through the edges 88 to 94 deformed.
  • the other areas of the lamellar element 1 are spaced apart from a wall of the opening 86 when passing through, with the result that free spaces 96 to 102 are formed between the lamellar element 1 and the wall.
  • the opening 86 has wedge surfaces which, as seen in the longitudinal direction - according to figure 10 perpendicular to the plane of the drawing - extend.
  • the edge regions 74 and 76 would thus be continuously deformed when the lamellar element 1 is guided through the opening 86 .
  • the wedge surfaces lead to the opening 86 narrowing in the longitudinal direction, i.e. in the direction of passage of the lamellar element 1.
  • a variant provides that it is designed as a meander-shaped curved strip, with a connecting section 4 for connecting two slats 2 and one slat 2 being formed alternately on this, viewed in the direction of the strip, characterized in that the slat element 1 during production via the Connecting sections 4 is subjected to a pressing force, and/or that slats 2 of at least a subset of the slats 2 have at least one bead 22, 24, 26.
  • the lamellar element of the variant can be subjected to a further force during production in the longitudinal direction and/or transverse direction.
  • connection sections 4 of the variant can be deformed by the application of the pressing force applied via the connection sections 4 .
  • connection sections 4 of the variant can be deformed from a curved shape into an at least partially flat shape by the application of the pressing force applied via the connection sections 4 .
  • a radius can be provided between a respective connecting section and the lamella 2a, 2b connected to it.
  • a respective lamella 2 of the variant, together with its two connecting sections 4 , can form approximately a Z-shape, viewed in a flow direction 16 of the lamella element 1 .
  • a first bead 24 can be introduced from their one side surface 36 and a second bead 22 or two second beads 22, 26 can be introduced from their other side surface 34.
  • a respective bead 22 to 26 of the variant can extend approximately parallel to a longitudinal edge 28 of its lamella 2 .
  • two lateral beads 22, 26 can be introduced from one side surface 34 and a central bead 24 from the other side surface 36.
  • the beads 22 to 26 of the variant can be designed in such a way that a flow cross section between two adjacent lamellae 2a, 2b, viewed in the flow direction, remains essentially the same.
  • the bead or beadings of the variant can be introduced at approximately the same position in each lamella 2 .
  • At least a plurality of connecting sections 4 or all connecting sections 4 of the variant can be subjected to the pressing force essentially simultaneously.
  • Beads 22, 24, 26 are introduced into the band before or during the forming of the band.
  • the lamellar element 1 Before the pressing force is applied to the lamellar element 1 and/or approximately at the same time as the pressing force is applied to the lamellar element 1, the lamellar element 1 can be subjected to a force in the longitudinal direction and/or transverse direction.
  • a lamellar element which has lamellae which are connected to one another in one piece via connecting sections.
  • the lamellar element is subjected to a pressing force from its connecting sections during manufacture, with the result that at least partial areas of the connecting sections are plastically deformed.
  • beading has been incorporated into some or all of the slats.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
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  • General Engineering & Computer Science (AREA)
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  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (8)

  1. Élément lamellaire qui est réalisé comme une bande pliée en méandres, dans lequel alternativement une section de liaison (4) pour la liaison de deux lamelles (2) et une lamelle (2) sont réalisées vu en direction de la bande au niveau de celle-ci, dans lequel des lamelles (2) d'au moins une quantité partielle des lamelles (2) présentent au moins une moulure (22, 24, 26) pour augmenter la rigidité de l'élément lamellaire (1), caractérisé en ce que une force de pressage (44,46) est appliquée sur l'élément lamellaire (1) lors de la fabrication par le biais d'au moins une quantité partielle des sections de liaison (4), par quoi dans chaque cas une zone partielle des sections de liaison (4) auxquelles est appliquée une force de pressage est plastiquement transformée, dans lequel la zone partielle se compose de deux zones de bord (74, 76) d'une section de liaison (4) respective à laquelle est appliquée une force de pressage.
  2. Élément lamellaire selon la revendication 1, dans lequel une section de liaison (4) respective sur laquelle est appliquée une force de pressage est configurée en forme d'arc vu en section transversale entre ses zones de bord (74, 76).
  3. Élément lamellaire selon l'une quelconque des revendications 1 à 2, dans lequel une zone de bord (74, 76) transformée respective est aplatie.
  4. Élément lamellaire selon l'une quelconque des revendications précédentes, dans lequel une force supplémentaire y est appliquée lors de la fabrication dans le sens longitudinal et/ou le sens transversal simultanément à la force de pressage (44, 46).
  5. Élément lamellaire selon l'une quelconque des revendications précédentes, dans lequel un rayon est prévu dans la zone de transition (18a, 18b) entre une section de liaison (4) respective et la lamelle (2a, 2b) reliée à celle-ci.
  6. Élément lamellaire selon l'une quelconque des revendications précédentes, dans lequel les moulures (22, 24, 26) sont réalisées de telle manière que respectivement entre deux lamelles contiguës (2a, 2b), une section transversale d'écoulement reste sensiblement identique vu dans le sens d'écoulement.
  7. Procédé de fabrication d'un élément lamellaire (1) avec les étapes :
    - la formation d'une bande en l'élément lamellaire (1) de telle manière qu'alternativement une section de liaison (4) et une lamelle (2) sont réalisées vu en direction de la bande, dans lequel une section de liaison respective (4) est courbée au moins par section vers l'extérieur,
    - caractérisé en ce qu'une force de pressage extérieure (44, 46) est appliquée sur l'élément lamellaire (1) par le biais des sections de liaison (4) depuis les deux côtés (6, 8) de l'élément lamellaire (1), ou en ce que la force de pressage (44, 46) extérieure est appliquée sur les sections de liaison (4) l'une après l'autre depuis un ou les deux côtés (6, 8) de l'élément lamellaire (1), dans lequel respectivement les deux zones de bord (74, 76) de la section de liaison (4) sont formées plastiquement,
    et en ce qu'avant ou pendant la formation de la bande, des moulures (22, 24, 26) sont ménagées pour augmenter la rigidité de l'élément lamellaire (1) dans la bande.
  8. Procédé selon la revendication 7, dans lequel avant que la force de pressage (44, 46) soit appliquée sur l'élément lamellaire (1) et/ou à peu près simultanément à l'application de la force de pressage sur l'élément lamellaire (1), une force est appliquée sur l'élément lamellaire (1) dans le sens longitudinal et/ou le sens transversal.
EP14179522.9A 2013-08-02 2014-08-01 Élément lamellaire et procédé de fabrication d'un élément lamellaire Active EP2832464B1 (fr)

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FR3092391B1 (fr) * 2019-02-05 2021-01-15 Faurecia Systemes Dechappement Plaque à ailettes, procédé de fabrication, échangeur de chaleur équipé d’une telle plaque, ligne d’échappement

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