WO2023032906A1 - 自動車用パネル構造および自動車用パネル構造の製造方法 - Google Patents

自動車用パネル構造および自動車用パネル構造の製造方法 Download PDF

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Publication number
WO2023032906A1
WO2023032906A1 PCT/JP2022/032381 JP2022032381W WO2023032906A1 WO 2023032906 A1 WO2023032906 A1 WO 2023032906A1 JP 2022032381 W JP2022032381 W JP 2022032381W WO 2023032906 A1 WO2023032906 A1 WO 2023032906A1
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WIPO (PCT)
Prior art keywords
outer panel
resin member
panel structure
area
resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/032381
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English (en)
French (fr)
Japanese (ja)
Inventor
豊 藥師神
隆一 西村
靖典 澤
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.)
Nippon Steel Corp
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Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP2023545555A priority Critical patent/JP7633567B2/ja
Priority to US18/293,718 priority patent/US20240343096A1/en
Priority to EP22864488.6A priority patent/EP4361004A4/en
Priority to CN202280056821.XA priority patent/CN117836196A/zh
Publication of WO2023032906A1 publication Critical patent/WO2023032906A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J5/00—Doors
    • B60J5/04—Doors arranged at the vehicle sides
    • B60J5/0412—Lower door structure
    • B60J5/0415—Outer panel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/001—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material
    • B62D29/005—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material preformed metal and synthetic material elements being joined together, e.g. by adhesives
    • 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
    • B32B15/08—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 synthetic resin
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J5/00—Doors
    • B60J5/04—Doors arranged at the vehicle sides
    • B60J5/0468—Fixation or mounting means specific for door components
    • B60J5/0469—Fixation or mounting means specific for door components for door panels, e.g. hemming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J5/00—Doors
    • B60J5/04—Doors arranged at the vehicle sides
    • B60J5/048—Doors arranged at the vehicle sides characterised by the material
    • B60J5/0484—Doors arranged at the vehicle sides characterised by the material hybrid, i.e. plastic moulded onto metal parts
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/06—Coating on the layer surface on metal layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/28—Multiple coating on one surface
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • 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
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/737—Dimensions, e.g. volume or area
    • B32B2307/7375—Linear, e.g. length, distance or width
    • B32B2307/7376—Thickness
    • 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
    • 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
    • B32B2607/00—Walls, panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/06—Fixed roofs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles

Definitions

  • the present disclosure relates to automotive panel structures and methods of manufacturing automotive panel structures.
  • This application claims priority based on Japanese Patent Application No. 2021-143779 filed in Japan on September 3, 2021, the content of which is incorporated herein.
  • the tension stiffness is a characteristic that expresses the resistance of the outer panel to bending. For example, when the outer panel of an automobile is touched, the outer panel is less likely to bend if the tension rigidity of the outer panel is high.
  • Patent Document 1 discloses a reinforcing structure in which an inner plate is provided on an outer plate via a foam layer, and the foam layer has an expansion ratio of 1.03 to 1.30 times.
  • the foam layer and the outer plate are heated at a high temperature and bonded.
  • the thickness of the outer plate is 0.6 mm or more, since the outer plate is thick, surface distortion due to the difference in coefficient of linear expansion between members is less likely to occur during adhesion.
  • the outer panel outer panel member
  • the outer panel is made thinner (for example, thickness 0.3 mm to 0.5 mm) in order to reduce weight, surface distortion occurs in the outer panel due to the difference in coefficient of linear expansion between members during bonding. , the appearance may deteriorate.
  • the present invention has been made in view of the above circumstances, and aims to provide an automobile panel structure that is lightweight, has excellent tension rigidity, and has an excellent appearance, and a method for manufacturing the automobile panel structure.
  • An automobile panel structure comprises a plate-shaped outer panel member, a resin member disposed on the inner surface of the outer panel member; a bonding portion that bonds the outer panel member and the resin member; with
  • the outer panel member includes a base material and a coating film provided on the base material,
  • the plate thickness of the base material is 0.3 mm to 0.5 mm,
  • the bending rigidity of the resin member is 0.3 ⁇ 10 6 N ⁇ mm 2 or more,
  • the adhesive part contains a cured product of a room temperature curing adhesive.
  • the area of the resin member arranged on the inner surface of the outer panel member is 50% or more of the total area of the inner surface of the outer panel member.
  • the area of the adhesive portion may be 5 area % or more of the arrangement area of the resin member.
  • the automotive panel structure according to any one of (1) to (3) above further includes an inner member disposed facing the inner surface of the outer panel member, and at least a portion of the inner member may be embedded in the resin member.
  • the inner member may extend along one in-plane direction of the outer panel member.
  • the resin member may be a thermosetting resin.
  • the resin member may be a thermoplastic resin.
  • the room temperature curing adhesive may be an acrylic adhesive.
  • the outer panel member may have a tensile strength of 440 MPa or more.
  • the resin member may not be painted.
  • a method for manufacturing an automotive panel structure includes: a painting step of painting the base material of the plate-shaped outer panel member; an adhesive application step of applying a room temperature curing adhesive to at least one of the inner surface of the outer panel member and the resin member after the coating step; and a bonding step of bonding the inner surface of the outer panel member and the resin member after the adhesive applying step.
  • the arrangement area of the resin member arranged on the inner surface of the outer panel member is 50 area% of the total area of the inner surface of the outer panel member. or more.
  • the area of the room temperature curing adhesive applied to the arrangement area of the resin member may be 5 area % or more.
  • the room temperature curing adhesive may be applied linearly.
  • the room temperature curing adhesive may be applied in dots.
  • an automobile panel structure that is lightweight, has excellent tension rigidity, and has an excellent appearance, and a method for manufacturing the automobile panel structure.
  • FIG. 1 is a plan view of an automotive panel structure according to a first embodiment of the present invention
  • FIG. 2 is an end view of the automotive panel structure of FIG. 1 along line AA
  • FIG. 1 is a flow chart of a method for manufacturing an automotive panel structure according to a first embodiment of the present invention
  • FIG. 4 is a plan view of an automotive panel structure according to a second embodiment of the present invention
  • Figure 6 is an end view of the automotive panel structure of Figure 5 taken along line BB
  • FIG. 6 is an end view along line B1-B1 of the automotive panel structure of FIG. 5
  • FIG. 5 is a plan view of an automotive panel structure according to a third embodiment of the present invention
  • FIG. 4 is a plan view of an automotive panel structure according to a second embodiment of the present invention
  • Figure 6 is an end view of the automotive panel structure of Figure 5 taken along line BB
  • FIG. 6 is an end view along line B1-B1 of the automotive panel structure of FIG. 5
  • FIG. 5 is a plan view of an
  • FIG. 9 is an end view of the automotive panel structure of FIG. 8 taken along line CC; 8 is a flow chart of a method for manufacturing an automotive panel structure according to a third embodiment of the present invention; It is a figure for demonstrating the application
  • FIG. 10 is a plan view of an automobile panel structure according to a fourth embodiment of the present invention; Figure 13 is an end view of the automotive panel structure of Figure 12 taken along line DD; 4 is a flow chart of a method for manufacturing an automotive panel structure according to a fourth embodiment of the present invention; It is a figure for demonstrating the application
  • FIG. 10 is a plan view of an automobile panel structure according to a fourth embodiment of the present invention.
  • Figure 13 is an end view of the automotive panel structure of Figure 12 taken along line DD;
  • 4 is a flow chart of a method for manufacturing an automotive panel structure according to a fourth embodiment of the present invention; It is a figure for
  • FIG. 11 is a plan view of an automotive panel structure according to a fifth embodiment of the present invention
  • Figure 17 is an end view of the automotive panel structure of Figure 16 along line EE
  • FIG. 10 is a flow chart of a method for manufacturing an automobile panel structure according to a fifth embodiment of the present invention
  • FIG. It is a figure for demonstrating the application
  • FIG. 1 is a plan view of an automotive panel structure according to the first embodiment of the present invention.
  • 2 is an end view of the automotive panel structure of FIG. 1 taken along line AA.
  • an automobile panel structure 10 according to the present embodiment includes a plate-shaped outer panel member 1, a resin member 2 disposed on the inner surface of the outer panel member 1, the outer panel member 1, and a resin member. and a bonding portion 3 for bonding the 2.
  • An automobile panel structure 10 according to this embodiment is an automobile panel structure applied to a side door.
  • the outer panel member 1 is a plate-like member having a curved surface that is convex toward the outside of the vehicle.
  • the vehicle-exterior surface may be referred to as an outer surface
  • the vehicle-interior surface may be referred to as an inner surface.
  • the outer panel member 1 is formed by press forming a metal plate such as a steel plate.
  • the outer panel member 1 of the present disclosure is a member after being painted. That is, the outer panel member 1 includes a base material 12 and a coating film 14 provided on the base material 12 . In the present disclosure, coating film 14 is provided on the outer and inner surfaces of base material 12 .
  • the tensile strength of the base material 12 of the outer panel member 1 is preferably 440 MPa or more, more preferably 590 MPa or more.
  • the tensile strength of the base material 12 can be obtained by preparing a No. 5 test piece described in JIS Z 2241:2011 from the base material 12 and using the test method described in JIS Z 2241:2011.
  • the coating film 14 is not particularly limited as long as it is formed using automotive paint.
  • a cationic epoxy resin, a cationic acrylic resin, an anionic acrylic resin, or the like can be used as the coating film 14 .
  • the thickness of the coating film 14 is not particularly limited. The thickness of the coating film 14 is, for example, 20 ⁇ m to 100 ⁇ m on one side of the steel plate.
  • the plate thickness of the base material 12 of the outer panel member 1 of the present disclosure is 0.3 mm to 0.5 mm. If the plate thickness of the base material 12 of the outer panel member 1 is 0.3 mm to 0.5 mm, the weight of the automobile panel structure 10 can be greatly reduced. If the plate thickness of the base material 12 is less than 0.3 mm, sufficient tensional rigidity cannot be obtained. If the plate thickness of the base material 12 exceeds 0.5 mm, the effect of weight reduction is reduced.
  • the bending rigidity of the resin member 2 of the present disclosure is 0.3 ⁇ 10 6 N ⁇ mm 2 or more. If the bending rigidity of the resin member 2 of the present disclosure is less than 0.3 ⁇ 10 6 N ⁇ mm 2 , sufficient tension rigidity cannot be obtained. Even if the bending rigidity of the resin member 2 exceeds 2 ⁇ 10 6 N ⁇ mm 2 , the effect is saturated, so the bending rigidity of the resin member 2 is preferably 2 ⁇ 10 6 N ⁇ mm 2 or less.
  • the average bending rigidity of the entire resin member 2 is preferably 0.3 ⁇ 10 6 N ⁇ mm 2 or more, but the bending rigidity of one or more portions of the resin member 2 is 0.3 ⁇ 10 6 N. - It may be less than mm2 .
  • the flexural rigidity of the resin member 2 can be measured, for example, by the following method. For example, using Shimazu Autograph AG-100KND, based on JIS A1408: 2017, the test piece size, bending indenter so that it is possible to measure the test piece of the resin member 2 cut out from the automobile panel structure 10 Correct the radius and the distance between supports, perform a three-point bending test, and measure the maximum load and stroke of the bending indenter. Specifically, the test piece has a width of 100 mm and a length of 200 mm, the distance L between supports is 180 mm, and the bending radius of the indenter is 50 mm. Also, the stroke speed of the bending indenter is set to 5 mm/min.
  • Equation (1) Young's modulus (MPa), I: geometrical moment of inertia (mm 4 ), L: distance between supports (mm), b: test piece width (mm), h: test piece thickness (mm), ⁇ F: Increase in load (N), ⁇ s: increment of deformation (mm)]
  • the thickness of the portion of the resin member 2 where the dimension in the direction perpendicular to the in-plane direction of the outer panel member 1 is the maximum (maximum thickness portion) is 3 mm or more and 60 mm or less. If the thickness of the thickest portion of the resin member 2 is 3 mm or more, it is possible to compensate for the lack of rigidity due to the thinning of the outer panel member 1, which is preferable. On the other hand, even if the thickness of the thickest portion of the resin member 2 exceeds 60 mm, the effect is saturated, so the thickness is preferably 60 mm or less.
  • the material of the resin member 2 may be resin, and both thermosetting resin and thermoplastic resin can be used.
  • thermosetting resins include epoxy resins, unsaturated polyester resins, and vinyl ester resins.
  • thermoplastic resins include polyolefins (polyethylene, polypropylene, etc.) and acid-modified products thereof, polyamide resins such as nylon 6 and nylon 66, thermoplastic aromatic polyesters such as polyethylene terephthalate and polybutylene terephthalate, polycarbonates, poly Examples include ether sulfone, polyphenylene ether and modified products thereof, polyarylate, polyether ketone, polyether ether ketone, polyether ketone ketone, vinyl chloride, styrenic resins such as polystyrene, and phenoxy resins.
  • the resin may be formed of a plurality of types of resin materials. It is preferable that the content of the thermoplastic resin in the resin member 2 is 90 mass % or more with respect to the total mass of the resin member 2 .
  • the thermoplastic resin content of the resin member 2 may be 100% by mass.
  • the resin member 2 may be a foamed resin obtained by foaming the above resin. By using the foamed resin, the weight of the automobile panel structure 10 can be reduced.
  • the foaming ratio is preferably 5 times or more and 50 times or less. When the foaming ratio is 5 times or more and 50 times or less, weight reduction can be achieved while the bending rigidity of the resin member 2 is set to 0.3 ⁇ 10 6 N ⁇ mm 2 or more.
  • the specific gravity of the resin member 2 is preferably 0.1 or less for weight reduction. By setting the specific gravity of the resin member 2 to 0.1 or less and the bending rigidity of the resin member 2 to 0.3 ⁇ 10 6 N ⁇ mm 2 or more, the tensile rigidity of the automobile panel structure 10 is maintained.
  • the automotive panel structure 10 can be made lighter.
  • the specific gravity of the resin member 2 may be 0.03 or more.
  • the resin member 2 does not have to be painted. Normally, the surface distortion occurs in the outer panel due to the heat applied during painting after bonding, and the appearance deteriorates. Since the resin member 2 is adhered to the coated outer panel member 1, surface distortion due to baking during electrodeposition coating after adhesion does not occur. Therefore, the automotive panel structure 10 is excellent in appearance.
  • the resin member 2 may be coated at room temperature (5 to 35° C.).
  • the arrangement area of the resin member 2 arranged on the inner surface of the outer panel member 1 is preferably 50 area % or more of the total area of the inner surface of the outer panel member 1 .
  • the rigidity of the automobile panel structure 10 is improved when the area of the resin member 2 arranged on the inner surface of the outer panel member 1 is 50 area % or more of the total area of the inner surface of the outer panel member 1 .
  • the arrangement area of the resin member 2 refers to the area of the portion of the outer panel member 1 where the resin member 2 is arranged. More preferably, the arrangement area of the resin member 2 is 70 area % or more of the total area of the inner surface of the outer panel member 1 .
  • the upper limit of the arrangement area of the resin member 2 is not particularly limited, it is 100% by area.
  • the arrangement area of the resin member 2 is preferably 90 area % or less.
  • one resin member 2 covers 50 area % or more of the inner surface of the outer panel member 1 .
  • Conventional electrodeposition coating causes surface distortion, but in the case of this embodiment, the resin member 2 is adhered to the outer panel member 1 after electrodeposition coating at room temperature. No strain occurs. Therefore, more than half of the inner surface of the outer panel member 1 can be covered with the resin member 2 . As a result, the tensional rigidity of the automotive panel structure 10 can be greatly improved.
  • the adhesive portion 3 of the present disclosure contains a cured product of a room temperature curing adhesive.
  • a room temperature curing adhesive is an adhesive that cures at 10°C to 30°C. Whether or not the adhesive is cured can be determined by placing the adhesive at 10° C. to 30° C. for 24 hours and determining whether the flexural modulus has doubled or more compared to before standing (before curing). The flexural modulus can be measured, for example, according to JIS K 7171-1:2016 (measurement temperature: 23°C).
  • Acrylic adhesives are preferable as room-temperature-curable adhesives. Examples of acrylic adhesives include SGA (Second Generation Acrylic Adhesive).
  • Anaerobic adhesives, instant adhesives, and elastomer-containing acrylic adhesives can be used as room temperature curing adhesives as long as they do not impair the effects of the present invention.
  • Room temperature curing adhesive refers to the state before curing.
  • the adhesive portion 3 of the present disclosure contains a cured product obtained by curing a room temperature curing adhesive. Since the coated outer panel member 1 and the resin member 2 are bonded together at room temperature, the outer panel member 1 is free from in-plane distortion. Therefore, it is possible to obtain the automobile panel structure 10 having an excellent appearance.
  • the area of the adhesive part 3 is 5 area % or more with respect to the area of the resin member 2 .
  • the tension rigidity of the automobile panel structure 10 can be improved. More preferably, the area of the bonding portion is 25 area % or more with respect to the arrangement area of the resin member 2 .
  • the area of the adhesion part 3 with respect to the arrangement area of the resin member 2 is 100% by area.
  • the automotive panel structure 10 (Bending rigidity of automobile panel structure 10)
  • the weight of the outer panel member 1 is reduced by thinning the thickness of the outer panel member 1, and the resin member 2 is bonded at room temperature to compensate for the lack of rigidity caused by the thinning of the outer panel member 1. Prevents the occurrence of internal strain.
  • the automotive panel structure 10 can achieve both weight reduction and rigidity, and therefore has excellent bending rigidity per unit weight.
  • the bending rigidity of the automobile panel structure 10 per 1 kg is preferably 0.57 ⁇ 10 6 N ⁇ mm 2 or more.
  • the bending rigidity of the automobile panel structure 10 per 1 kg is preferably 1.47 ⁇ 10 6 N ⁇ mm 2 or more.
  • the bending rigidity of the automobile panel structure 10 per 1 kg is preferably 1.46 ⁇ 10 6 N ⁇ mm 2 or more.
  • the thickness of the resin member 2 is 60 mm, the bending rigidity of the automobile panel structure 10 per 1 kg is preferably 1.49 ⁇ 10 6 N ⁇ mm 2 or more.
  • the bending stiffness of the automotive panel structure 10 can be measured by the same method as the bending stiffness of the resin member 2 .
  • FIG. 3 is a flow chart of the manufacturing method S10 for the automobile panel structure according to the first embodiment.
  • the manufacturing method S10 of the automotive panel structure according to the first embodiment includes a painting step S1 in which a base material of a plate-like outer panel member is painted, and an inner surface of the outer panel member 1 is coated after the painting step S1.
  • an adhesive application step S2 of applying a room temperature curing adhesive to at least one of the resin member 2 and the adhesive application step S2
  • an adhesion step S3 of bonding the inner surface of the outer panel member 1 and the resin member 2 after the adhesive application step S2.
  • Each step will be described below.
  • the base material 12 press-formed into the shape of the outer panel member 1 is painted.
  • the coating film 14 is formed on the base material 12 .
  • the coating method is not particularly limited as long as it is a coating method used for automobile applications. Examples of the coating method include electrodeposition coating.
  • the coating film 14 is formed by subjecting the base material 12 to degreasing, surface conditioning, chemical conversion treatment, electrodeposition coating, and baking. Degreasing, surface conditioning, chemical conversion treatment, electrodeposition coating, and baking are preferably general methods used in automobile applications.
  • FIG. 4 is a diagram for explaining the application position of the room temperature curing adhesive. It is preferable to apply a room temperature curing adhesive to the entire area of at least one of the inner surface of the outer panel member 1 and the resin member 2 .
  • the tensional rigidity of the automobile panel structure 10 can be improved.
  • the application area 30 to which the room temperature curing adhesive is applied is the same area as the placement area 20 .
  • the room temperature curing adhesive is applied to the entire arrangement area 20 on the inner surface of the outer panel member 1 , but it may be applied to the arrangement area of the resin member 2 . Also, the room temperature curing adhesive may be applied to the entire surface of the arrangement area 20 of the inner surface of the outer panel member 1 and the arrangement area of the resin member 2 .
  • the arrangement area 20 of the outer panel member 1 refers to an area of the inner surface of the outer panel member 1 where the resin member 2 is to be arranged.
  • the area where the resin member 2 is arranged refers to the area of the surface that is joined to the outer panel member 1 .
  • the arrangement area of the resin member 2 and the adhesion area of the adhesion part 3 are equal, the area of the adhesion part 3 with respect to the arrangement area of the resin member 2 is 100% by area.
  • the arrangement area of the resin member 2 arranged on the inner surface of the outer panel member 1 is 50% or more of the total area of the inner surface of the outer panel member 1.
  • the rigidity of the automobile panel structure 10 is improved when the area of the resin member 2 arranged on the inner surface of the outer panel member 1 is 50 area % or more of the total area of the inner surface of the outer panel member 1 .
  • the arrangement area of the resin member 2 refers to the area of the portion of the outer panel member 1 where the resin member 2 is arranged. More preferably, the arrangement area of the resin member 2 is 70 area % or more of the total area of the inner surface of the outer panel member 1 .
  • the upper limit of the arrangement area of the resin member 2 is not particularly limited, it is 100% by area.
  • the arrangement area of the resin member 2 is preferably 90 area % or less.
  • the inner surface of the outer panel member 1 and the resin member 2 are adhered after the adhesive application step S2. Specifically, the arrangement area of the outer panel member 1 and the arrangement area of the resin member 2 coated with the room temperature curable adhesive are bonded together, and the room temperature curable adhesive is cured at room temperature for a predetermined period of time to form an automobile panel. We get the structure 10.
  • the automotive panel structure 10 according to the first embodiment has been described in detail above.
  • the outer panel member 1 of the first embodiment has the coating film 14 on the outer surface and the inner surface, the coating film may be formed only on the outer surface of the outer panel member 1 .
  • FIG. 5 is a plan view of an automotive panel structure 10A according to a second embodiment of the invention.
  • 6 is an end view of the automotive panel structure of FIG. 5 taken along line BB.
  • 7 is an end view along line B1-B1 of the automotive panel structure of FIG. 5.
  • an automobile panel structure 10A according to the present embodiment includes a plate-like outer panel member 1, a resin member 2A disposed on the inner surface of the outer panel member 1, the outer panel member 1, and a bonding portion 3A for bonding the resin member 2A.
  • the same reference numerals are assigned to the same components as in the first embodiment, the description thereof is omitted, and only the different points will be described.
  • the bending rigidity of the resin member 2A of the present disclosure is 0.3 ⁇ 10 6 N ⁇ mm 2 or more. If the bending rigidity of the resin member 2A of the present disclosure is less than 0.3 ⁇ 10 6 N ⁇ mm 2 , sufficient tensile rigidity cannot be obtained. Even if the bending rigidity of the resin member 2A exceeds 2 ⁇ 10 6 N ⁇ mm 2 , the effect is saturated, so the bending rigidity of the resin member 2A is preferably 2 ⁇ 10 6 N ⁇ mm 2 or less.
  • the thickness of the maximum thickness portion where the dimension in the direction perpendicular to the in-plane direction of the outer panel member 1 is maximum is preferably 3 mm or more and 60 mm or less. If the thickness of the thickest portion of the resin member 2A is 3 mm or more, it is preferable because the lack of rigidity due to the thinning of the outer panel member 1 can be compensated for. On the other hand, even if the thickness of the thickest portion of the resin member 2A exceeds 60 mm, the effect is saturated, so the thickness is preferably 60 mm or less.
  • the same resin as that of the resin member 2 can be used as the material of the resin member 2A.
  • the resin member 2A does not have to be painted. Since the resin member 2A is adhered to the coated outer panel member 1, surface distortion due to baking during electrodeposition coating after adhesion does not occur, which is preferable. Also, the resin member 2A may be coated with a coating that can be performed at room temperature.
  • the arrangement area of the resin member 2A arranged on the inner surface of the outer panel member 1 is 50% or more of the total area of the inner surface of the outer panel member 1.
  • the arrangement area of the resin member 2A arranged on the inner surface of the outer panel member 1 is 50% or more of the total area of the inner surface of the outer panel member 1, so that the rigidity of the automobile panel structure 10 is improved.
  • the arrangement area of the resin member 2A refers to the area of the portion of the outer panel member 1 where the resin member 2A is arranged. More preferably, the arrangement area of the resin member 2A is 70 area % or more of the total area of the inner surface of the outer panel member 1 .
  • the arrangement area of the resin member 2A is preferably 90 area % or less.
  • the resin member 2A is preferably arranged along the direction in which the curvature of the outer panel member 1 increases. That is, by arranging along the direction in which the curvature increases in this way, it is possible to further increase the tensional rigidity.
  • a plurality of (seven in FIG. 5) resin members 2A are arranged on the inner surface of the outer panel member 1 .
  • the plurality of resin members 2A it is possible to reduce the weight of the automobile panel structure 10 while increasing the tensional rigidity of the necessary portions.
  • the adhesive portion 3A of the present disclosure contains a cured product of a room temperature curing adhesive.
  • the room-temperature curing adhesive the same adhesive as that for the bonding portion 3 can be used.
  • the area of the bonding portion 3A is 5 area % or more with respect to the area of the resin member 2A.
  • the tension rigidity of the automotive panel structure 10 can be improved by setting the area of the bonding portion 3A to 5 area % or more with respect to the arrangement area of the resin member 2A. More preferably, the area of the bonding portion 3A is 25 area % or more with respect to the arrangement area of the resin member 2A. In the present embodiment, since the arrangement area of the resin member 2A and the adhesion area of the adhesive portion 3A are equal, the area of the adhesion portion 3A with respect to the arrangement area of the resin member 2A is 100% by area.
  • FIG. 8 is a plan view of an automotive panel structure 10B according to a third embodiment of the invention.
  • 9 is an end view of the automotive panel structure of FIG. 8 taken along line CC.
  • an automobile panel structure 10B according to the present embodiment includes a plate-shaped outer panel member 1, a resin member 2 arranged on the inner surface of the outer panel member 1, the outer panel member 1, a resin member and a bonding portion 3B for bonding the 2.
  • the same reference numerals are assigned to the same components as those in the first embodiment, the description thereof is omitted, and only the different points are described.
  • the adhesive part 3B of the present disclosure contains a cured product of a room temperature curing adhesive.
  • the cured product of the room-temperature curing adhesive used for the bonding portion 3B is the same as that for the bonding portion 3B.
  • the bonding part 3B is provided linearly. Work efficiency can be improved by providing the bonding portion 3B in a linear shape.
  • the area of the bonding portion 3B with respect to the arrangement area of the resin member 2 is 5 area % or more.
  • the tension rigidity of the automobile panel structure 10 can be improved. More preferably, the area of the bonding portion 3B with respect to the arrangement area of the resin member 2 is 25 area % or more.
  • FIG. 10 is a flow chart of the manufacturing method S10B for the automobile panel structure according to the third embodiment.
  • the manufacturing method S10B of the automotive panel structure according to the third embodiment comprises a painting step S1 in which the base material of the plate-shaped outer panel member is painted, and the inner surface of the outer panel member 1 is an adhesive application step S2B of applying a room-temperature curing adhesive to at least one of the resin member 2 and the adhesive application step S2B; and an adhesion step S3 of bonding the inner surface of the outer panel member 1 and the resin member 2 after the adhesive application step S2B And prepare.
  • a painting step S1 in which the base material of the plate-shaped outer panel member is painted, and the inner surface of the outer panel member 1 is an adhesive application step S2B of applying a room-temperature curing adhesive to at least one of the resin member 2 and the adhesive application step S2B
  • an adhesion step S3 of bonding the inner surface of the outer panel member 1 and the resin member 2 after the adhesive application step S2B
  • a room temperature curing adhesive is applied to at least one of the inner surface of the outer panel member 1 and the resin member 2 after the coating step S1.
  • FIG. 11 is a diagram for explaining the application position of the room temperature curing adhesive. It is preferable to linearly apply the room-temperature curing adhesive to at least one of the inner surface of the outer panel member 1 and the resin member 2 .
  • the application area of the room temperature curing adhesive with respect to the arrangement area of the resin member 2 may be 5 area % or more.
  • the application areas 30B for applying the room temperature curing adhesive are evenly spaced within the placement area 20 .
  • the room-temperature curing adhesive is linearly applied to the arrangement area 20 on the inner surface of the outer panel member 1 , but it may be applied linearly to the arrangement area of the resin member 2 .
  • the room-temperature curing adhesive may be linearly applied to the arrangement area 20 of the inner surface of the outer panel member 1 and the arrangement area of the resin member 2 .
  • the linear application means application with a line width of about 1 cm to 5 cm, for example.
  • FIG. 12 is a plan view of an automobile panel structure 10C according to a fourth embodiment of the invention.
  • 13 is an end view of the automotive panel structure of FIG. 12 taken along line DD.
  • an automobile panel structure 10C according to the present embodiment includes a plate-like outer panel member 1, a resin member 2 disposed on the inner surface of the outer panel member 1, the outer panel member 1, and a resin member. and a bonding portion 3C for bonding the 2.
  • the same reference numerals are assigned to the same components as in the first embodiment, the description thereof is omitted, and only the different points will be described.
  • the adhesive part 3C of the present disclosure contains a cured product of a room temperature curing adhesive.
  • the cured product of the room-temperature curing adhesive used for the bonding portion 3C is the same as that for the bonding portion 3C.
  • the adhesive part 3C is provided in a dot shape. Work efficiency can be improved by providing the adhesion part 3C in a dotted
  • the area of the bonding portion 3C with respect to the arrangement area of the resin member 2 is 5 area % or more.
  • the tension rigidity of the automobile panel structure 10 can be improved. More preferably, the area of the bonding portion 3C with respect to the arrangement area of the resin member 2 is 25 area % or more.
  • FIG. 14 is a flow chart of a manufacturing method S10C for an automobile panel structure according to the fourth embodiment.
  • the manufacturing method S10C of the automobile panel structure according to the fourth embodiment comprises a painting step S1 in which the base material of the plate-like outer panel member is painted, and the inner surface of the outer panel member 1 is coated after the painting step S1.
  • FIG. 15 is a diagram for explaining the application position of the room temperature curing adhesive. It is preferable to apply the room-temperature curing adhesive in dots to at least one of the inner surface of the outer panel member 1 and the resin member 2 .
  • the tensional rigidity of the automotive panel structure 10 is improved while improving the workability by applying the room temperature curing adhesive in dots to the arrangement area 20 of at least one of the inner surface of the outer panel member 1 and the resin member 2. be able to.
  • the plurality of application areas 30C to which the room temperature curing adhesive is applied are evenly spaced within the placement area 20 .
  • the room-temperature curing adhesive is applied in dots to the arrangement area 20 on the inner surface of the outer panel member 1 , but it may be applied in dots to the arrangement area of the resin member 2 . Further, the room-temperature curing adhesive may be applied in dots to the arrangement area 20 of the inner surface of the outer panel member 1 and the arrangement area of the resin member 2 .
  • the dot-like application means, for example, that the dot diameter is about 0.1 to 5 mm and the amount of adhesive is about 0.001 to 3 mg.
  • FIG. 16 is a plan view of an automobile panel structure 10D according to a fifth embodiment of the invention.
  • 17 is an end view of the automotive panel structure of FIG. 16 taken along line EE.
  • an automobile panel structure 10D according to the present embodiment includes a plate-shaped outer panel member 1, a resin member 2D disposed on the inner surface of the outer panel member 1, the outer panel member 1, and a resin member 2D.
  • a bonding portion 3D for bonding 2D and an inner member 4 are provided.
  • the same reference numerals are assigned to the same components as in the first embodiment, and the description thereof will be omitted, and only the different points will be described.
  • the bending rigidity of the resin member 2D of the present disclosure is 0.3 ⁇ 10 6 N ⁇ mm 2 or more. If the bending rigidity of the resin member 2D of the present disclosure is less than 0.3 ⁇ 10 6 N ⁇ mm 2 , sufficient tension rigidity cannot be obtained. Even if the bending rigidity of the resin member 2D exceeds 2 ⁇ 10 6 N ⁇ mm 2 , the effect is saturated, so the bending rigidity of the resin member 2D is preferably 2 ⁇ 10 6 N ⁇ mm 2 or less.
  • the thickness of the maximum thickness portion where the dimension in the direction perpendicular to the in-plane direction of the outer panel member 1 is maximum is preferably 3 mm or more and 60 mm or less. If the thickness of the thickest portion of the resin member 2D is 3 mm or more, it is possible to compensate for the lack of rigidity due to the thinning of the outer panel member 1, which is preferable. On the other hand, even if the thickness of the thickest portion of the resin member 2D exceeds 60 mm, the effect is saturated, so the thickness is preferably 60 mm or less.
  • the same resin as the resin member 2 can be used as the material of the resin member 2D.
  • the resin member 2D does not have to be painted. Since the resin member 2D is adhered to the coated outer panel member 1, surface distortion due to baking during electrodeposition coating after adhesion does not occur, which is preferable. Also, the resin member 2D may be coated at room temperature.
  • the arrangement area of the resin member 2 ⁇ /b>D arranged on the inner surface of the outer panel member 1 is preferably 50% or more of the total area of the inner surface of the outer panel member 1 .
  • the arrangement area of the resin member 2D arranged on the inner surface of the outer panel member 1 is 50% or more of the total area of the inner surface of the outer panel member 1, so that the rigidity of the automobile panel structure 10 is improved.
  • the arrangement area of the resin member 2D refers to the area of the portion of the outer panel member 1 where the resin member 2D is arranged. More preferably, the arrangement area of the resin member 2 ⁇ /b>D is 70 area % or more of the total area of the inner surface of the outer panel member 1 .
  • the arrangement area of the resin member 2D is preferably 90 area % or less.
  • two resin members 2D are provided with the inner member 4 sandwiched therebetween.
  • the tension rigidity can be further improved.
  • the adhesive portion 3D of the present disclosure contains a cured product of a room temperature curing adhesive.
  • the room-temperature curing adhesive the same adhesive as that for the bonding portion 3 can be used.
  • the area of the bonding portion 3D with respect to the arrangement area of the resin member 2D is 5 area % or more.
  • the area of the bonding portion 3D is 25 area % or more with respect to the arrangement area of the resin member 2D.
  • the area of the adhesion part 3D with respect to the arrangement area of the resin member 2D is 100% by area.
  • the inner member 4 is a long member arranged to face the inner surface of the outer panel member 1 .
  • the inner member 4 is arranged so as to extend along one in-plane direction of the outer panel member 1 .
  • the inner member 4 serves to reinforce the automobile panel structure 10 by being attached to the outer panel member 1 with its longitudinal direction aligned with the vehicle width direction.
  • the inner member 4 includes a top plate portion 121, a pair of side wall portions 123, 123 bent and extending from both ends of the top plate portion 121, and a top plate portion of the pair of side wall portions 123, 123. It has a substantially hat-shaped cross-section consisting of a pair of flanges 125, 125 bending and extending outward from the end opposite to 121. As shown in FIG. In the present disclosure, the width direction of the inner member 4 means a direction parallel to the top plate portion 121 among directions perpendicular to the longitudinal direction of the inner member 4 .
  • the inner member 4 can be obtained, for example, by press forming a metal plate such as a steel plate.
  • the width direction end portions of the pair of flange portions 125, 125 of the inner member 4 enter into the pair of resin members 2D, 2D from the side surfaces of the pair of resin members 2D, 2D.
  • at least part of the inner member 4 is buried in the resin member 2D.
  • "at least a portion of the inner member 4 is embedded in the resin member” means that at least a portion of the inner member 4 enters the resin member and is held in surface contact.
  • the upper surfaces of the pair of resin members 2D, 2D are joined to the inner surface of the outer panel member 1 via the bonding portion 3D.
  • FIG. 18 is a flow chart of a manufacturing method S10D for an automobile panel structure according to the fifth embodiment.
  • the manufacturing method S10D of the automotive panel structure according to the fifth embodiment includes a coating step S1 of coating the base material 12 of the plate-shaped outer panel member 1, an inner member 4 and a resin member 2D. and an adhesive application step of applying a room temperature curing adhesive to at least one of the inner surface of the outer panel member 1 and the resin member 2D after the painting step S1 and the resin member molding step S4.
  • S2D, and a bonding step S3 of bonding the inner surface of the outer panel member 1 and the resin member 2D after the adhesive applying step S2D Each step will be described below.
  • a molding die is set so as to surround a predetermined portion of the inner member 4, and a resin material is injected into the molding die and solidified to form the inner member 4 and the pair of resin members 2D. , 2D.
  • a resin material is injected into the molding die and solidified to form the inner member 4 and the pair of resin members 2D. , 2D.
  • Both a thermoplastic resin and a thermosetting resin can be used as the resin material.
  • the resin material may contain a foaming agent. Examples of foaming agents include N,N'-dinitrosopentamethylenetetramine, azodicarbonamide, 4,4'-oxybis(benzenesulfonylhydrazide), hydrogencarbonate, sodium hydrogencarbonate and the like.
  • the resin member molding step S4 by first injecting a resin material into the molding die and solidifying it, an intermediate product of the pair of resin members 2D and 2D is molded, and slit processing is performed on each intermediate product. They may be integrated by inserting the flange portion 125 of the inner member 4 into the slit.
  • FIG. 19 is a diagram for explaining the application position of the room temperature curing adhesive. It is preferable to apply a room-temperature curing adhesive to the entire arrangement area of at least one of the inner surface of the outer panel member 1 and the resin member 2D. By applying the room temperature curing adhesive to the entire surface of the arrangement area 20 of at least one of the inner surface of the outer panel member 1 and the resin member 2D, the tensional rigidity of the automobile panel structure 10 can be improved.
  • the application area 30 ⁇ /b>D for applying the room temperature curing adhesive is the same range as the arrangement area 20 .
  • the room temperature curing adhesive is applied to the entire arrangement area 20 on the inner surface of the outer panel member 1, but it may be applied to the arrangement area of the resin member 2D. Further, the room temperature curing adhesive may be applied to the entire surface of the arrangement area 20 of the inner surface of the outer panel member 1 and the arrangement area of the resin member 2D.
  • the arrangement area of the resin member 2D arranged on the inner surface of the outer panel member 1 is 50% or more of the total area of the inner surface of the outer panel member 1.
  • the arrangement area of the resin member 2D arranged on the inner surface of the outer panel member 1 is 50% or more of the total area of the inner surface of the outer panel member 1, so that the rigidity of the automobile panel structure 10 is improved.
  • the automotive panel structure 10D of the fifth embodiment has been described in detail above.
  • a member with a hat-shaped cross section is used as the inner member 4, but a member with a U-shaped cross section or a T-shaped cross section may be used.
  • the resin member 2D is provided over the entire length of the inner member 4 in the longitudinal direction, the resin member 2D may be provided only in a part of the inner member 4 in the longitudinal direction.
  • the automotive panel structure 10 of the present disclosure has been described above based on the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment. It is not limited to this.
  • the automotive panel structure 10 for side doors can also be applied to panel structures for hoods, roofs, back doors, and the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Body Structure For Vehicles (AREA)
PCT/JP2022/032381 2021-09-03 2022-08-29 自動車用パネル構造および自動車用パネル構造の製造方法 Ceased WO2023032906A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2023545555A JP7633567B2 (ja) 2021-09-03 2022-08-29 自動車用パネル構造および自動車用パネル構造の製造方法
US18/293,718 US20240343096A1 (en) 2021-09-03 2022-08-29 Panel structure for automobile, and manufacturing method of panel structure for automobile
EP22864488.6A EP4361004A4 (en) 2021-09-03 2022-08-29 Panel structure for automobile, and manufacturing method of panel structure for automobile
CN202280056821.XA CN117836196A (zh) 2021-09-03 2022-08-29 汽车用面板构造以及汽车用面板构造的制造方法

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JP2021143779 2021-09-03
JP2021-143779 2021-09-03

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US (1) US20240343096A1 (https=)
EP (1) EP4361004A4 (https=)
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WO (1) WO2023032906A1 (https=)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63258274A (ja) 1987-04-16 1988-10-25 Nitto Electric Ind Co Ltd 自動車車体の補強構造
JP2001271446A (ja) * 2000-03-27 2001-10-05 Denki Kagaku Kogyo Kk 金属パネル
JP2009073406A (ja) * 2007-09-21 2009-04-09 Toyota Motor Corp 車両ボディー用パネルとこれを備えた車両
WO2020145198A1 (ja) * 2019-01-10 2020-07-16 日本製鉄株式会社 自動車インナーパネルおよび自動車パネル
WO2021064870A1 (ja) * 2019-10-01 2021-04-08 日本製鉄株式会社 曲面パネル部材
JP2021143779A (ja) 2020-03-11 2021-09-24 株式会社日阪製作所 プレート式熱交換器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE316461T1 (de) * 2002-05-02 2006-02-15 Sandwichelemente und ihre verwendung
JP2019209660A (ja) * 2018-06-08 2019-12-12 日本製鉄株式会社 曲面パネル部材
WO2020145293A1 (ja) * 2019-01-08 2020-07-16 日本製鉄株式会社 外装パネルおよび外装パネルを備える自動車

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63258274A (ja) 1987-04-16 1988-10-25 Nitto Electric Ind Co Ltd 自動車車体の補強構造
JP2001271446A (ja) * 2000-03-27 2001-10-05 Denki Kagaku Kogyo Kk 金属パネル
JP2009073406A (ja) * 2007-09-21 2009-04-09 Toyota Motor Corp 車両ボディー用パネルとこれを備えた車両
WO2020145198A1 (ja) * 2019-01-10 2020-07-16 日本製鉄株式会社 自動車インナーパネルおよび自動車パネル
WO2021064870A1 (ja) * 2019-10-01 2021-04-08 日本製鉄株式会社 曲面パネル部材
JP2021143779A (ja) 2020-03-11 2021-09-24 株式会社日阪製作所 プレート式熱交換器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4361004A4

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JP7633567B2 (ja) 2025-02-20
EP4361004A4 (en) 2024-11-13
JPWO2023032906A1 (https=) 2023-03-09
US20240343096A1 (en) 2024-10-17
CN117836196A (zh) 2024-04-05
EP4361004A1 (en) 2024-05-01

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