EP1430473A1 - Dispositif de blindage, d'isolation et/ou d'attenuation du bruit; utilisation et procede de fabrication associes - Google Patents

Dispositif de blindage, d'isolation et/ou d'attenuation du bruit; utilisation et procede de fabrication associes

Info

Publication number
EP1430473A1
EP1430473A1 EP02779269A EP02779269A EP1430473A1 EP 1430473 A1 EP1430473 A1 EP 1430473A1 EP 02779269 A EP02779269 A EP 02779269A EP 02779269 A EP02779269 A EP 02779269A EP 1430473 A1 EP1430473 A1 EP 1430473A1
Authority
EP
European Patent Office
Prior art keywords
slots
plate
slot
embossing
adjacent
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.)
Withdrawn
Application number
EP02779269A
Other languages
German (de)
English (en)
Inventor
Franz Schweiggart
Klaus Pfaffelhuber
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.)
Faist Automotive GmbH and Co KG
Original Assignee
Faist Automotive GmbH and Co KG
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 Faist Automotive GmbH and Co KG filed Critical Faist Automotive GmbH and Co KG
Publication of EP1430473A1 publication Critical patent/EP1430473A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general

Definitions

  • the invention relates to a device of the type mentioned in the preamble of claim 1 and to uses and methods for producing the same.
  • Sound shielding elements are already known (WO 00/68039), which are used to protect against sound propagation from the noise area of a room into a neighboring room and / or to cover sound reflecting and / or sound generating components.
  • sound shielding elements have already proven themselves, despite a relatively small perforation area ratio (proportion of the plate area or layer area occupied by perforations in the total area of the plate or layer), problems arise during deformation, for example with relatively low bending rates, which often lead to cracks in the plate or shift. This difficulty arises especially when the sound shielding element is not covered with additional layers, but instead consists for example of only a single metal layer or metal foil.
  • the invention is based on the problem of crack formation, in particular when deforming, in a simple manner and / or to simplify production.
  • the slots are arranged individually and / or in groups offset from one another such that at least a part of a slot or a group of slots is offset with respect to the adjacent slots or adjacent groups of slots with respect to the slot orientation, as is e.g. is shown in Fig. 13.
  • the longitudinal directions of the slots can run parallel, provided that the slots opposite adjacent slots e.g. are laterally offset.
  • an overlap is not a prerequisite for the invention.
  • the offset can also be done by offset the longitudinal direction of the slots e.g. 2 take place. It is advisable to offset the longitudinal alignment of adjacent slots or adjacent groups of slots from 70 ° to 110 °, in particular approximately 90 °, from one another. This gives the slotted plate or layer according to the invention optimal structuring with regard to subsequent non-cutting deformation processes.
  • a slot has a certain orientation both at its ends and is arranged in the region of its center at a distance from such adjacent slots, the longitudinal slot direction (alignment) of which is arranged orthogonally or at right angles to the slot alignment of the first-mentioned slot.
  • a slot in a row should be spaced apart from adjacent slots in an adjacent row so that the former slot covers not only the distance between the adjacent slots in the adjacent row, but also a partial length of these adjacent slots in the adjacent row.
  • a chessboard-like grouping of slots for example according to FIG. 6, also offers particular advantages, according to which groups of slots of the same direction are alternated by neighboring groups of slots of different directions.
  • slot width b dimensions between 0.05 mm and 0.15 mm and slot lengths 1 from 0.8 mm to 8 mm are recommended.
  • the slots should have a spacing A between 0.5 mm and 5 mm, in particular between 1 mm and 3 mm, from one another.
  • the slot area ratio i.e. the area ratio of the slots to the total area of the plate should be between 0.001 and 8%, in particular between 0.1 and 6%.
  • the slots are expediently produced by means of lifting knives, as are e.g. used for the production of expanded metal, or by punching tools with knife inserts or cutting edges.
  • Rotary rollers with sharp edges or cutting edges are also preferred.
  • the cutting tool for forming a slot has an upper punch provided with a cutting edge and a lower punch provided with a pocket-shaped recess.
  • the cutting edge forms the part of the plate or layer material that it has contacted into the recess and shears - to form a slit - a part of the formed material part, in particular from the unmolded material part.
  • the tooth width b of the embossing teeth is preferably chosen between 0.1 mm and 20 mm, in particular between 0.5 mm and 2 mm.
  • FIG. 1 shows a partial view of a motor vehicle built-in part in which the sound shielding element according to the invention is produced as a molded part and is used to cover part of the engine;
  • FIG. 2 shows a pattern of slots designed and arranged according to the invention, in a plan view of the plate or layer in question, to be precise on a large scale;
  • FIG. 3 shows another pattern of the slot arrangement with parallel rows of slots
  • FIG. 4 shows a slit pattern in which rows of identically aligned slits are each arranged in a wave shape
  • Figure 5 is a plan view of a plate with angled slots
  • FIG. 6 shows a plan view of a plate with a checkerboard pattern constructed according to the invention, each of groups of slots oriented in the same direction in the vicinity of groups of slots oriented orthogonally thereto.
  • FIG. 7 is a greatly enlarged plan view of part of a knob plate designed according to the invention.
  • FIG. 8 shows a partial section (A-A) through this
  • Figure 9 is a partial oblique view of a knobbed plate according to the prior art.
  • FIG. 10 shows a schematic cross section on the area of a pair of embossing rollers or embossing wheels, which forms sheet-like material into the knobbed plate;
  • Figure 11 is a schematic plan view of the embossing roller or embossing wheel pair with the center distance A between the two;
  • Figure 12 schematically shows a multi-curved sound shield plate
  • Figure 13 is a plan view of a portion of a sound shield plate
  • Figure 14 is a section A-A of Figure 13;
  • FIG. 15 shows a schematic cross section through a tool during shear-forming and 16a, b and c three different upper punches for the tool shown in FIG.
  • the soundproofing or shielding element according to FIG. 1 serving as the motor cover is made from a thin plate (1) with a thickness of 0.8 mm. Over almost the entire area, the sound shielding element is provided with many small openings, most of which openings are in the form of slots (2) and are assembled here in a checkered pattern of groups 12, 12a of differently inclined slots. Part of the sound shielding element can also be broken through in the form of round holes (2d). Larger openings or cutouts (3) are used for fastening to the chassis of the motor vehicle by inserting screws through the openings (3) and screwing the sound shielding element tight.
  • rows of slots (2) are arranged, the longitudinal direction of which point in the same direction (from top to bottom).
  • the slot width (b) is 0.1 mm and the slot length (1) is 3 mm.
  • the distance (A) is 2 mm, so that there is a distance (AI) of about 0.5xA, more precisely 0.95 mm.
  • the slot width (b) is about 0.1 mm with a slot length (1) of 6 mm and a distance (A) of slots (2) of the same row of slots of 2 mm.
  • the ends of the slot (2) each overlap a partial length (T1) of the slots (2) of the row 6 adjacent to a row 5.
  • the slot arrangement is symmetrical, i.e. that the center line (M) of a slot (2) of the row 6 runs exactly between the ends of the adjacent row 5.
  • the distance (A) of the rows 5, 6 is about 2.6 mm.
  • the slot width (b) is 0.1 mm, while a slot length (1) of 1.5 mm was chosen.
  • the distances (A) between adjacent slots (2a) of the same slot row 5 as well as between slots (2, 2a) of adjacent rows 6 are here about 1 mm, if this is possible.
  • the slot arms (2c) of adjacent angle slots (2b) arranged in a row also run at an equal angle ⁇ of 90 °.
  • the slot width is 0.1 mm and the slot lengths (11) of the slot arms (2c) 1.5 mm. This results in distances (A) between adjacent slots of adjacent rows between 1 mm and 1.5 mm.
  • the distance (AI) between the points pointing away from each other in the center of adjacent and offset angular slots (2b) is 3 mm and the distance (A2) of the tips from adjacent angular slots (2b) of the same row is approximately 2.9 mm.
  • FIG. 6 shows three different checkerboard patterns a, b and c of slot groups.
  • a group (12) of four rectified slots (2) in this example is arranged on the four sides of the square-shaped group (12) by a neighboring group (12a) of adjacent slots (2a) oriented orthogonally to the first slots (2) ,
  • a pattern of elevations 12 and depressions 13 is embossed from the plane of the plate 1, in particular aluminum with a plate thickness d of 0.5 mm, as is shown better and enlarged in the partial cross section of FIG.
  • the most embossed bottoms 14 of the elevations 22 and depressions 13 are at their ends 17 via the wall parts 15 in connection with the plate material, but are separated on their longitudinal sides from this material, so that there are the slots 2 which barely noticeable in the view of FIG. 7, but clearly appear in the cross section according to FIG.
  • two embossing rollers 20, 20a are located at an axial distance A from one another. These embossing rollers 20, 20a are each provided with a number of embossing wheels 21, 21a, which alternately have large and small outer diameters, which are determined by the embossing teeth 122.
  • the width b of the embossing teeth 122 should be between 0.1 mm and 20 mm, in particular between 0.5 and 2 mm. The width b is limited by relatively sharp edges.
  • the tooth flanks 23 of the embossing teeth 122 define the wall parts 15, which form transitions from the bottoms 14 of the depressions 13 or elevations 22 of the plate 1.
  • the tooth heads 18, on the other hand, determine the shape of the bottoms 14.
  • the tooth heads 18 are as flat as possible and in particular flat.
  • flat web-shaped material 25 is pressed into the spaces between intermeshing embossing teeth 122, in particular by means of an auxiliary roller 24, with deformation.
  • the center distance A between the embossing rollers 20, 20a is set so that the bottoms 14 are embossed out of the material to form the slots 2.
  • the knob plate 1 formed in this way leaves the pair of rollers via the auxiliary roller 26 in a straight plane 27, from which the three-dimensional deformation, for example to engine covers, can be carried out without the knob plate tearing in places of small bending radii.
  • the device shown schematically in FIG. 12 is a heat plate from the tunnel area of the exhaust line of a passenger car (passenger car), which at the same time provides sound-shielding and, because of its structure-borne sound damping, also soundproofing.
  • the plate 1 is bent with relatively small bending radii along the bending lines B, whereby essentially flat plate parts 28, 29, 30 and 31 result.
  • the following bending angles are used, for example:
  • the largest areas of these surfaces are provided with slot-like openings or slits, which are not shown in FIG. 12 for the sake of clarity.
  • the area F around a mounting hole - and possibly some other areas - are not perforated with slots.
  • FIGS. 13 and 14 The type and arrangement of the slots is shown schematically in FIGS. 13 and 14: Here, parallel double rows of slots 2 and adjacent slots 2a are arranged in such a way that the slots 2 in their extension are each in a space between the adjacent slots 2a of the neighboring row or group of neighbors Plate 1 run. According to the section AA of FIG. 13, FIG.
  • each recess 13a has only one slot 2.
  • the slitting and deformation is a kind of punching process of a "punching tool”.
  • the shaping and perforation or slit formation of the device shown in FIG. 12 takes place by means of such a punching tool, which is composed of parts of different angles of inclination ⁇ , ⁇ and ⁇ according to FIGS. 16a, b and c; 16, a large number of such upper punches with shear edges 34a, 34b and 34c, as shown in FIG. 16, are distributed over the surfaces 28, 30 and 31 in question, while the essentially flat plate parts 31 are perforated by tool parts, which result from upper punches 32 with the shear edges 34 Figure 15 put together.
  • the devices designed according to the invention are preferably used for sound insulation and sound shielding, but also for sound damping. It has been shown that the slotted plates have less tendency to emit sound in certain frequency ranges, but instead have a specific structure-borne sound absorption that is comparable to felt material.
  • Deformable metal sheet made of aluminum, for example, is particularly suitable for the material, which due to its high thermal conductivity also ensures that heat is quickly dissipated from the engine compartment to the surroundings.
  • a sound shielding element is stable up to very high temperatures and can therefore also be used as a heat shield in high-temperature areas in which plastic parts are less suitable.
  • the invention is also applicable to molded plastic parts.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

L'invention vise à perfectionner la fabrication de plaques minces, dotées notamment d'un motif en creux et en bosses et/ou de brèches en forme de fentes. A cet effet, les creux (13) et les bosses (12) sont fendus sur au moins un côté. Les fentes (2) sont, individuelles et/ou en groupes (12, 12a), mutuellement décalées de sorte qu'une partie d'une fente (2) ou d'un groupe de fentes (2) est placée de manière décalée par rapport aux fentes voisines (2a) ou aux groupes de fentes voisines (12a).
EP02779269A 2001-09-27 2002-08-20 Dispositif de blindage, d'isolation et/ou d'attenuation du bruit; utilisation et procede de fabrication associes Withdrawn EP1430473A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2001147645 DE10147645A1 (de) 2001-09-27 2001-09-27 Schallabschirmelement und Verfahren zur Herstellung
DE10147645 2001-09-27
PCT/EP2002/009296 WO2003030144A1 (fr) 2001-09-27 2002-08-20 Dispositif de blindage, d'isolation et/ou d'attenuation du bruit; utilisation et procede de fabrication associes

Publications (1)

Publication Number Publication Date
EP1430473A1 true EP1430473A1 (fr) 2004-06-23

Family

ID=7700475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02779269A Withdrawn EP1430473A1 (fr) 2001-09-27 2002-08-20 Dispositif de blindage, d'isolation et/ou d'attenuation du bruit; utilisation et procede de fabrication associes

Country Status (3)

Country Link
EP (1) EP1430473A1 (fr)
DE (1) DE10147645A1 (fr)
WO (1) WO2003030144A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004019055A1 (de) * 2004-04-20 2005-11-17 Aksys Gmbh Vorrichtung zum Abschirmen, Dämmen und/oder Dämpfen von Schall und Verfahren zur Herstellung derselben
NO322685B1 (no) * 2005-03-23 2006-11-27 Deamp As Plateelement
ES2952382T3 (es) * 2011-10-01 2023-10-31 Dukta Gmbh Elemento de absorción acústica
CN110886636A (zh) * 2019-11-29 2020-03-17 安徽江淮汽车集团股份有限公司 发动机试验台架降噪装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2100660B (en) * 1981-04-20 1985-06-12 Nissen Kagaku Kogyo Kk Stamped plastics sheet
JPS60143926A (ja) * 1983-12-30 1985-07-30 Nippon Petrochem Co Ltd 凹凸シートの成形装置
DE29500207U1 (de) * 1995-01-07 1996-05-09 Hueppe Form Sonnenschutz Schallabsorptionselement
ATE221006T1 (de) * 1999-05-06 2002-08-15 Faist Automotive Gmbh & Co Kg Schallabschirmelement, verwendung desselben und verfahren zu dessen herstellung
DE20006946U1 (de) * 2000-04-14 2001-08-16 Faist Automotive Gmbh & Co Kg Breitbandig schallabsorbierender Bauteil für Wände, Böden und Decken

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03030144A1 *

Also Published As

Publication number Publication date
WO2003030144A1 (fr) 2003-04-10
DE10147645A1 (de) 2003-04-10

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