WO2007062340A2 - Heat shield with integral attachment flanges - Google Patents
Heat shield with integral attachment flanges Download PDFInfo
- Publication number
- WO2007062340A2 WO2007062340A2 PCT/US2006/061076 US2006061076W WO2007062340A2 WO 2007062340 A2 WO2007062340 A2 WO 2007062340A2 US 2006061076 W US2006061076 W US 2006061076W WO 2007062340 A2 WO2007062340 A2 WO 2007062340A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- core
- facing sheets
- assembly
- flanges
- facing
- Prior art date
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 230000004888 barrier function Effects 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 24
- 238000003466 welding Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 230000002028 premature Effects 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000013011 mating Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0869—Insulating elements, e.g. for sound insulation for protecting heat sensitive parts, e.g. electronic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/52—Protection, safety or emergency devices; Survival aids
- B64G1/58—Thermal protection, e.g. heat shields
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/496—Multiperforated metal article making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/1234—Honeycomb, or with grain orientation or elongated elements in defined angular relationship in respective components [e.g., parallel, inter- secting, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12361—All metal or with adjacent metals having aperture or cut
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12361—All metal or with adjacent metals having aperture or cut
- Y10T428/12368—Struck-out portion type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
- Y10T428/24281—Struck out portion type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24777—Edge feature
Definitions
- the subject invention relates to a heat shield, and in particular a heat shield made from a layered sheet material including aluminum facings and a perforated steel core which maintains an air-space separation between the aluminum facings.
- Modern internal combustion engines are typically designed to have high working temperatures to provide high thermodynamic and fuel consumption efficiencies. These high working temperatures, however, are a source of great practical difficulty for features in proximity to a heat source. Accordingly, careful heat management is necessary to ensure that the components of an engine which are ill-suited for operation in high temperature environments are properly protected from high heat sources. Proper heat protection will ensure reliable system and component operations over the life of the engine.
- Heat shields are used as a technique for managing heat in a vehicular engine.
- a heat shield is affixed to the components to be shielded by brackets or clips. These mounting techniques require features added to the heat shield and/or the component to be shielded to hold the heat shield in position. Because the exact configuration of the heat shield can vary from model to model and application to application, it can be difficult and expensive to provide mounting features in some applications.
- stress concentrations can be induced leading to premature cracking or other failure modes.
- a layered heat shield assembly is provided of the type used in vehicular applications to create a thermal barrier between a heat source and a temperature sensitive component.
- the assembly comprises first and second metallic facing sheets having generally aligned peripheral edges.
- a metallic core is disposed between and directly connects the first and second facing sheets.
- the core establishes a generally consistent spacing between the first and second sheets.
- the core includes a plurality of integral flanges projecting in cantilever fashion outwardly from the peripheral edges of the first and second sheets. The integral flanges establish extended fixation points for supporting the assembly relative to a heat source.
- a method for making a layered heat shield assembly of the type used in vehicular applications to create a thermal barrier between a heat source and a temperature sensitive component.
- the method comprises the steps of forming a first metallic facing sheet having peripheral edges and also forming a second metallic facing sheet having peripheral edges that are substantially equivalent in size and shape to the first facing sheet.
- the method further includes forming a metallic core from sheet material and then perforating the core in a plurality of spaced-apart locations. At least one leg is bent out of the sheet material obliquely away from each perforation.
- the method includes affixing each leg to respective inside surfaces of the first and second facing sheets so that the core establishes a generally consistent spacing between the first and second facing sheets and holds the first and second facing sheets in an overlapping, generally aligned condition.
- the improvement comprises forming a plurality of flanges integrally from the core and directing the flanges outwardly from the generally aligned peripheral edges of the first and second facing sheets so that the integral flanges establish extended fixation points for supporting the assembly relative to a heat source.
- FIG. 1 is a cross-sectional view of a typical prior art heat shield of the type including a pair of spaced apart aluminum facing materials having an interstitial perforated steel core forming a baffle-like gap filling function;
- Figure 2 is a simplified view showing a prior art heat shield affixed to a feature requiring protection from a heat source using prior art bracket and clip devices;
- Figure 3 is a cross-sectional view as in Figure 1 but showing a heat shield according to the subject invention including flange-like extensions formed by the core material to provide fixation points; and
- Figure 4 is a view similar to Figure 3 but showing a heat shield according to the subject invention which is supported relative to a heat source through the flanges.
- a prior art style heat shield is generally shown at 10 in Figure 1.
- the assembly 10 includes a pair of sheet-like aluminum facings held in a spaced, generally parallel orientation by a core material 14.
- the core 14 is fabricated of a perforated steel or stainless steel material in an off-set, zigzag pattern by which the point of attachment between the core 10 and one aluminum facing is off-set from its point of attachment to the other aluminum facing. Accordingly, heat conducted through the core material 14 between the aluminum facings 12 is forced to traverse a distance greater than the normal spacing between the aluminum facings 12.
- the core 14 is perforated thereby enhancing cooling through ventilation and natural convection.
- the prior art heat shield assembly 10 has a perimeter defined by boundary edges 16 which may be formed by a simple cutting or stamping operation wherein all three material layers 12, 14 are simultaneously formed and sheared.
- the heat shield assembly 10 can be deployed in an application where a component 18 (or components) to be protected is maintained in close proximity to a heat source 20.
- the heat shield 10 thus forms a barrier between the heat source 20 and the components 18 to be protected primarily from radiant heat energy but also from convective heat energy.
- Supplemental attachment features such as bracket 22 and clip 24 are required for mounting the heat shield assembly 10 to the component to be protected 18.
- brackets 22 and clips 24 add expense and complexity to the assembly operation, and can contribute to premature failure of the assembly 10.
- bracket 22 requires an added fixation bolt 23 set into a drilled and tapped hole.
- clip 24 requires the formation of a special mating feature 25 which adds weight and complexity to the system.
- the rivets 26 can diminish the overall heat shielding efficiency of the assembly 10 by providing a thermal conductive path directly between the facings 12. The rivets 26 can also lead to premature failure by creating stress concentrations.
- FIGS 3 and 4 illustrate an improved heat shield assembly generally shown at 30.
- the heat shield assembly 30 is constructed similarly to the prior art device in that a pair of aluminum facings 32 are held in a consistently spaced, generally parallel orientation by an interstitial core material 34 having the characteristic zigzag baffle pattern described above.
- the edges 36 of the aluminum facing 32 establish the general boundary of the effective area for shielding components from a heat source.
- the core 34 includes a plurality of perforations 50 which are formed in a stamping or other suitable operation.
- the tooling used to form the perforations 50 create alternating up and down legs 52 from the upset material.
- the legs 52 are attached such as by welding to the inside surfaces of the first and second facing sheets 32, creating an integral assembly.
- the rigid nature of the core 34 results in a stiff corrugation-like construction where first and second facing sheets 32 are held parallel and spaced from one another and air is enabled to circulate convectively through the interstitial space via the network of perforations 52.
- An equivalent construction of the core 34 comprises a plurality of discrete segments formed in the depicted zigzag baffle pattern with leg segments adjoining the respective inside faces of the first and second facing sheets 32 for maintaining a generally consistent spacing.
- the heat shield assembly 30 is shown in an exemplary operative position affixed near components 38 to be protected.
- a heat source 40 is depicted in close proximity.
- the subject heat shield assembly 30 is provided with integral flanges 42 extending from the core 34 and beyond the edges 36 of the aluminum facing materials 32. Noticeably absent from the component 38 to be protected are additional fixation bolts and special mating features to anchor clips and brackets.
- the flanges 42 are preferably made from non-perforated material, whereas the remainder of the core 34, i.e., residing between the aluminum facings 32, is perforated to promote air circulation and better heat transfer.
- the flanges 42 are ideally suited for fixation directly to the components to be protected 38, such a by welding as shown at 44. Alternatively, high temperature adhesive or mechanical clipping or interlocking of the flanges 42 may be used instead of welding, as well as fasteners. [0020]
- the flanges 42 provide substantial enhanced versatility to the heat shield assembly 30, while reducing cost and improving service life through the elimination of high failure rate, high stress components.
- the novel flange construction 42 enables the heat shield assembly 30 to be affixed directly to certain heat sources, for example an exhaust pipe, rather than to the component 38 to be protected as illustrated in Figure 4. Of course, many other application mounting locations are possible. By proper selection of materials, the flanges 42 can be modified to allow for welding directly to stainless steel surfaces.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Mechanical Engineering (AREA)
- Critical Care (AREA)
- Emergency Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Remote Sensing (AREA)
- Aviation & Aerospace Engineering (AREA)
- Thermal Sciences (AREA)
- Exhaust Silencers (AREA)
- Body Structure For Vehicles (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Laminated Bodies (AREA)
Abstract
An aluminum layered heat shield assembly (30) includes a pair of spaced metallic facing sheets (32) fabricated from an aluminum composition. In the interstitial space between the facing sheets (32), a perforated steel core (34) is formed in the general shape of a zigzag baffle with segments that adjoin and maintain a generally consistent spacing. The perforated steel core (34) is fabricated with non-perforated flanges (42) which project outwardly from between the aluminum facing sheets (32) to establish extensions for attachment to a supporting structure.
Description
HEAT SHIELD WITH INTEGRAL ATTACHMENT FLANGES
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims priority to U.S. provisional application entitled AL-RE HEAT SHIELD WITH FABRICATED IN-PLACE ATTACHMENT FLANGES having Serial Number 60/737,973 and filed on November 18, 2005.
BACKGROUND OF THE INVENTION Field of the Invention
[0002] The subject invention relates to a heat shield, and in particular a heat shield made from a layered sheet material including aluminum facings and a perforated steel core which maintains an air-space separation between the aluminum facings. Related Art
[0003] Modern internal combustion engines are typically designed to have high working temperatures to provide high thermodynamic and fuel consumption efficiencies. These high working temperatures, however, are a source of great practical difficulty for features in proximity to a heat source. Accordingly, careful heat management is necessary to ensure that the components of an engine which are ill-suited for operation in high temperature environments are properly protected from high heat sources. Proper heat protection will ensure reliable system and component operations over the life of the engine.
[0004] Heat shields are used as a technique for managing heat in a vehicular engine. According to the prior art, a heat shield is affixed to the components to be shielded by brackets or clips. These mounting techniques require features added to the heat shield and/or the component to be shielded to hold the heat shield in position. Because the exact configuration of the heat shield can vary from model to model and application to application, it can be difficult and expensive to provide mounting features in some applications. In addition, when mounting features are secured to the heat shield with rivets or other fasteners, stress concentrations can be induced leading to premature cracking or other failure modes.
[0005] Accordingly, alternative techniques for mounting heat shields, other than clips, brackets or other added features, would be beneficial.
SUMMARY OF THE INVENTION
[0006] A layered heat shield assembly is provided of the type used in vehicular applications to create a thermal barrier between a heat source and a temperature sensitive component. The assembly comprises first and second metallic facing sheets having generally aligned peripheral edges. A metallic core is disposed between and directly connects the first and second facing sheets. The core establishes a generally consistent spacing between the first and second sheets. The core includes a plurality of integral flanges projecting in cantilever fashion outwardly from the peripheral edges of the first and second sheets. The integral flanges establish extended fixation points for supporting the assembly relative to a heat source.
[0007] According to another aspect of the invention, a method is provided for making a layered heat shield assembly of the type used in vehicular applications to create a thermal barrier between a heat source and a temperature sensitive component. The method comprises the steps of forming a first metallic facing sheet having peripheral edges and also forming a second metallic facing sheet having peripheral edges that are substantially equivalent in size and shape to the first facing sheet. The method further includes forming a metallic core from sheet material and then perforating the core in a plurality of spaced-apart locations. At least one leg is bent out of the sheet material obliquely away from each perforation. The method includes affixing each leg to respective inside surfaces of the first and second facing sheets so that the core establishes a generally consistent spacing between the first and second facing sheets and holds the first and second facing sheets in an overlapping, generally aligned condition. The improvement comprises forming a plurality of flanges integrally from the core and directing the flanges outwardly from the generally aligned peripheral edges of the first and second facing sheets so that the integral flanges establish extended fixation points for supporting the assembly relative to a heat source.
[0008] The integral flanges which extend directly from the core can be directly attached to a supporting article to affix the subject heat shield assembly in an operative position without the need for added brackets, clips or other features to accomplish fixation.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] These and other features and advantages of the present invention will become more readily appreciated when considered in connection with the following detailed description and appended drawings, wherein:
[OOIOJ Figure 1 is a cross-sectional view of a typical prior art heat shield of the type including a pair of spaced apart aluminum facing materials having an interstitial perforated steel core forming a baffle-like gap filling function;
[0011] Figure 2 is a simplified view showing a prior art heat shield affixed to a feature requiring protection from a heat source using prior art bracket and clip devices;
[0012] Figure 3 is a cross-sectional view as in Figure 1 but showing a heat shield according to the subject invention including flange-like extensions formed by the core material to provide fixation points; and
[0013] Figure 4 is a view similar to Figure 3 but showing a heat shield according to the subject invention which is supported relative to a heat source through the flanges.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0014] Referring to the Figures, wherein like numerals indicate like or corresponding parts throughout the several views, a prior art style heat shield is generally shown at 10 in Figure 1. The assembly 10 includes a pair of sheet-like aluminum facings held in a spaced, generally parallel orientation by a core material 14. The core 14 is fabricated of a perforated steel or stainless steel material in an off-set, zigzag pattern by which the point of attachment between the core 10 and one aluminum facing is off-set from its point of attachment to the other aluminum facing. Accordingly, heat conducted through the core material 14 between the aluminum facings 12 is forced to traverse a distance greater than the normal spacing between the aluminum facings 12. In addition, the core 14 is perforated thereby enhancing cooling through ventilation and natural convection. The prior art heat shield assembly 10 has a perimeter defined by boundary edges 16 which may be formed by a simple cutting or stamping operation wherein all three material layers 12, 14 are simultaneously formed and sheared.
[0015] As shown in Figure 2, the heat shield assembly 10 can be deployed in an application where a component 18 (or components) to be protected is maintained in close proximity to a heat
source 20. The heat shield 10 thus forms a barrier between the heat source 20 and the components 18 to be protected primarily from radiant heat energy but also from convective heat energy. Supplemental attachment features such as bracket 22 and clip 24 are required for mounting the heat shield assembly 10 to the component to be protected 18. These brackets 22 and clips 24 add expense and complexity to the assembly operation, and can contribute to premature failure of the assembly 10. For example, bracket 22 requires an added fixation bolt 23 set into a drilled and tapped hole. And clip 24 requires the formation of a special mating feature 25 which adds weight and complexity to the system. Furthermore, the rivets 26 can diminish the overall heat shielding efficiency of the assembly 10 by providing a thermal conductive path directly between the facings 12. The rivets 26 can also lead to premature failure by creating stress concentrations.
[0016] In contrast, Figures 3 and 4 illustrate an improved heat shield assembly generally shown at 30. The heat shield assembly 30 is constructed similarly to the prior art device in that a pair of aluminum facings 32 are held in a consistently spaced, generally parallel orientation by an interstitial core material 34 having the characteristic zigzag baffle pattern described above. The edges 36 of the aluminum facing 32 establish the general boundary of the effective area for shielding components from a heat source.
[0017] As best shown in Figure 3, the core 34 includes a plurality of perforations 50 which are formed in a stamping or other suitable operation. The tooling used to form the perforations 50 create alternating up and down legs 52 from the upset material. The legs 52, in turn, are attached such as by welding to the inside surfaces of the first and second facing sheets 32, creating an integral assembly. The rigid nature of the core 34 results in a stiff corrugation-like construction where first and second facing sheets 32 are held parallel and spaced from one another and air is enabled to circulate convectively through the interstitial space via the network of perforations 52. An equivalent construction of the core 34 comprises a plurality of discrete segments formed in the depicted zigzag baffle pattern with leg segments adjoining the respective inside faces of the first and second facing sheets 32 for maintaining a generally consistent spacing. [0018] Referring to Figure 4, the heat shield assembly 30 is shown in an exemplary operative position affixed near components 38 to be protected. A heat source 40 is depicted in close proximity. Instead of the prior art add-on bracket and clip features, which have certain
disadvantages, the subject heat shield assembly 30 is provided with integral flanges 42 extending from the core 34 and beyond the edges 36 of the aluminum facing materials 32. Noticeably absent from the component 38 to be protected are additional fixation bolts and special mating features to anchor clips and brackets. The flanges 42 are preferably made from non-perforated material, whereas the remainder of the core 34, i.e., residing between the aluminum facings 32, is perforated to promote air circulation and better heat transfer.
[0019] The flanges 42 are ideally suited for fixation directly to the components to be protected 38, such a by welding as shown at 44. Alternatively, high temperature adhesive or mechanical clipping or interlocking of the flanges 42 may be used instead of welding, as well as fasteners. [0020] The flanges 42 provide substantial enhanced versatility to the heat shield assembly 30, while reducing cost and improving service life through the elimination of high failure rate, high stress components. The novel flange construction 42 enables the heat shield assembly 30 to be affixed directly to certain heat sources, for example an exhaust pipe, rather than to the component 38 to be protected as illustrated in Figure 4. Of course, many other application mounting locations are possible. By proper selection of materials, the flanges 42 can be modified to allow for welding directly to stainless steel surfaces.
[0021] While prior art heat shield assemblies to not allow for welding unless added features are provided to the outside of the base material construction, the subject heat shield assembly 30 overcomes this disadvantage. By fabricating the core 34 with non-perforated strips (which may include stainless steel core materials), flanges 42 are formed beyond the terminal edges 36 of the aluminum facings 34, and allow for convenient welding points 44.
[0022] Obviously, many modifications and variations of the present invention are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.
Claims
1. A layered heat shield assembly of the type used in vehicular applications to create a thermal barrier between a heat source and a temperature sensitive component, said assembly comprising: first and second metallic facing sheets having generally aligned peripheral edges; a metallic core disposed between and directly connecting each of said first and second facing sheets, said core establishing a generally consistent spacing between said first and second facing sheets; and said core including a plurality of integral flanges projecting in cantilever fashion outwardly from said peripheral edges of said first and second facing sheets, whereby said integral flanges establish extended fixation points for supporting said assembly relative to a heat source.
2. The assembly of Claim 1, wherein said core includes a plurality of spaced-apart perforations, with said flanges remaining devoid of perforations.
3. The assembly of Claim 2, wherein said core includes at least one leg formed adjacent each of said perforations, said leg fixedly attached to an inside surface of one of said first and second facing sheets.
4. The assembly of Claim 2, wherein said core includes a pair of legs formed adjacent each of said perforations, said pair of legs extending in opposite directions for fixed attachment to respective inside surfaces of said first and second facing sheets.
5. The assembly of Claim 1, wherein said first and second facing sheets are fabricated from sheet aluminum material.
6. The assembly of Claim 1, wherein said core is fabricated from sheet steel material.
7. The assembly of Claim 1, wherein said first and second facing sheets extend continuous and uninterrupted within the area bounded by said peripheral edges.
8. A layered heat shield assembly of the type used in vehicular applications to create a thermal barrier between a heat source and a temperature sensitive component, said assembly comprising: first and second metallic facing sheets fabricated from sheet aluminum material and having generally aligned peripheral edges; a metallic core fabricated from sheet steel material and disposed between and directly connecting each of said first and second facing sheets, said core establishing a generally consistent spacing between said first and second facing sheets, said core including a plurality of spaced-apart perforations and a pair of legs formed adjacent each of said perforations, said pair of legs extending in opposite directions for fixed attachment to respective inside surfaces of said first and second facing sheets; and said core including a plurality of integral flanges projecting in cantilever fashion outwardly from said peripheral edges of said first and second facing sheets, said flanges devoid of perforations, whereby said integral flanges establish extended fixation points for supporting said assembly relative to a heat source.
9. A method for making a layered heat shield assembly of the type used in vehicular applications to create a thermal barrier between a heat source and a temperature sensitive component, said method comprising the steps of: forming a first metallic facing sheet having peripheral edges; forming a second metallic facing sheet having peripheral edges substantially equivalent in size and shape to the first facing sheet; forming a metallic core from sheet material; perforating the core in a plurality of spaced-apart locations; bending at least one leg out of the core sheet material obliquely away from each perforation; affixing each leg to respective inside surfaces of the first and second facing sheets so that the core establishes a generally consistent spacing between the first and second facing sheets and holds the first and second facing sheets in an overlapping, generally aligned condition; and forming a plurality of flanges integrally from the core and directing the flanges outwardly from the peripheral edges of the first and second facing sheets so that the integral flanges establish extended fixation points for supporting the assembly relative to a heat source.
10. The method of Claim 9 wherein said perforating step includes spacing all of the perforations away from the flanges.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06839950.0A EP1948433B1 (en) | 2005-11-18 | 2006-11-18 | Heat shield with integral attachment flanges |
CN2006800513595A CN101360602B (en) | 2005-11-18 | 2006-11-18 | Heat shield with integral attachment flanges |
KR1020087014431A KR101303631B1 (en) | 2005-11-18 | 2006-11-18 | Heat shield with integral attachment flanges |
JP2008541500A JP5199879B2 (en) | 2005-11-18 | 2006-11-18 | Heat shield with integral mounting flange |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US73797305P | 2005-11-18 | 2005-11-18 | |
US60/737,973 | 2005-11-18 | ||
US11/560,914 US7851069B2 (en) | 2005-11-18 | 2006-11-17 | Heat shield with integral attachment flanges |
US11/560,914 | 2006-11-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2007062340A2 true WO2007062340A2 (en) | 2007-05-31 |
WO2007062340A3 WO2007062340A3 (en) | 2007-11-29 |
Family
ID=38053917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2006/061076 WO2007062340A2 (en) | 2005-11-18 | 2006-11-18 | Heat shield with integral attachment flanges |
Country Status (6)
Country | Link |
---|---|
US (1) | US7851069B2 (en) |
EP (1) | EP1948433B1 (en) |
JP (1) | JP5199879B2 (en) |
KR (1) | KR101303631B1 (en) |
CN (1) | CN101360602B (en) |
WO (1) | WO2007062340A2 (en) |
Cited By (2)
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US8540224B2 (en) | 2010-09-29 | 2013-09-24 | Walker Lee Guthrie | Variable amplitude sine wave spring |
US8668189B2 (en) | 2010-09-29 | 2014-03-11 | Walker Lee Guthrie | Sine wave spring |
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ES2364037T3 (en) | 2001-12-10 | 2011-08-23 | Novartis Ag | METHODS OF TREATMENT OF PSYCHOSIS AND SCHIZOPHRENIA BASED ON POLYMORPHISMS OF THE CNTF GEN. |
FI125708B (en) * | 2007-09-11 | 2016-01-15 | Outokumpu Oy | Panel design |
US8056953B2 (en) * | 2008-06-13 | 2011-11-15 | Itt Manufacturing Enterprises, Inc. | Thermal barrier system |
JP4852620B2 (en) * | 2009-03-03 | 2012-01-11 | 石川ガスケット株式会社 | Heat insulator |
US9399271B2 (en) | 2010-12-28 | 2016-07-26 | Rolls-Royce Corporation | Heat treating and brazing of an object |
US8635860B1 (en) | 2011-02-02 | 2014-01-28 | Ralph P. Robinson | Internal combustion engine heat transfer system |
DE102011006145A1 (en) * | 2011-03-25 | 2012-09-27 | Federal-Mogul Sealing Systems Gmbh | Composite material with embossing and microperforation |
JP5799719B2 (en) * | 2011-09-30 | 2015-10-28 | 三菱自動車工業株式会社 | Heat shield structure of gas flow path joint |
JP5842553B2 (en) * | 2011-11-09 | 2016-01-13 | 株式会社Ihi | Turbocharger |
US9297596B2 (en) | 2013-02-22 | 2016-03-29 | Interface Performance Materials, Inc. | Lightweight thermal shield |
JP5486713B1 (en) * | 2013-04-03 | 2014-05-07 | ニチアス株式会社 | Shielding body and method for manufacturing shielding body |
FR3012514B1 (en) | 2013-10-31 | 2015-12-25 | Airbus Operations Sas | THERMAL PROTECTION DEVICE FOR EQUIPMENT IN A TURBOMACHINE ENGINE COMPARTMENT |
KR101558422B1 (en) | 2014-02-12 | 2015-10-07 | 울산대학교 산학협력단 | Heat protector and Manufacturing method of the same |
CN104443443A (en) * | 2014-11-03 | 2015-03-25 | 兰州空间技术物理研究所 | Space application low-temperature thermal insulation support |
RU174570U1 (en) * | 2016-12-30 | 2017-10-20 | Публичное акционерное общество "Завод фрикционных и термостойких материалов" | Heat shield |
CN109398257A (en) * | 2018-10-15 | 2019-03-01 | 安徽金诚车辆工程有限公司 | A kind of fire resistant Environmentally-friepanel panel structure |
US11572159B2 (en) | 2018-10-29 | 2023-02-07 | Goodrich Corporation | Segmented heat shield with reduced interlayer thermal conduction |
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- 2006-11-18 JP JP2008541500A patent/JP5199879B2/en not_active Expired - Fee Related
- 2006-11-18 EP EP06839950.0A patent/EP1948433B1/en not_active Not-in-force
- 2006-11-18 WO PCT/US2006/061076 patent/WO2007062340A2/en active Application Filing
- 2006-11-18 CN CN2006800513595A patent/CN101360602B/en not_active Expired - Fee Related
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Publication number | Priority date | Publication date | Assignee | Title |
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US8540224B2 (en) | 2010-09-29 | 2013-09-24 | Walker Lee Guthrie | Variable amplitude sine wave spring |
US8668189B2 (en) | 2010-09-29 | 2014-03-11 | Walker Lee Guthrie | Sine wave spring |
Also Published As
Publication number | Publication date |
---|---|
KR20080076951A (en) | 2008-08-20 |
CN101360602A (en) | 2009-02-04 |
US7851069B2 (en) | 2010-12-14 |
CN101360602B (en) | 2011-06-08 |
EP1948433A4 (en) | 2010-11-17 |
EP1948433A2 (en) | 2008-07-30 |
KR101303631B1 (en) | 2013-09-11 |
JP5199879B2 (en) | 2013-05-15 |
EP1948433B1 (en) | 2013-04-17 |
US20070116978A1 (en) | 2007-05-24 |
WO2007062340A3 (en) | 2007-11-29 |
JP2009516800A (en) | 2009-04-23 |
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