WO2023032149A1 - Multilayer panel for spot-welding, and panel joining structure - Google Patents

Multilayer panel for spot-welding, and panel joining structure Download PDF

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Publication number
WO2023032149A1
WO2023032149A1 PCT/JP2021/032430 JP2021032430W WO2023032149A1 WO 2023032149 A1 WO2023032149 A1 WO 2023032149A1 JP 2021032430 W JP2021032430 W JP 2021032430W WO 2023032149 A1 WO2023032149 A1 WO 2023032149A1
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Prior art keywords
panel
layer
resin material
spot
spot welding
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PCT/JP2021/032430
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French (fr)
Japanese (ja)
Inventor
智也 吉田
尭之 金田
功介 河合
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株式会社Subaru
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Application filed by 株式会社Subaru filed Critical 株式会社Subaru
Priority to JP2023508013A priority Critical patent/JP7495575B2/en
Priority to PCT/JP2021/032430 priority patent/WO2023032149A1/en
Publication of WO2023032149A1 publication Critical patent/WO2023032149A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/10—Spot welding; Stitch welding
    • B23K11/11—Spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/16—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded
    • 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
    • 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

Definitions

  • the present invention relates to a multi-layer panel for spot welding and a panel joint structure.
  • an insulator made of a heat-resistant material having a melting or decomposition temperature of 1050° C. or higher is arranged outside the resin material on at least one of the four sides of the steel plate.
  • fillet welding and butt welding can be performed using the location where the insulator is arranged as the welding location.
  • the insulator between the pair of steel plates prevents current flow during spot welding, so it cannot be used as a structural material for spot welding.
  • spot welding resistance spot welding
  • a pair of metal materials to be joined are pressurized by electrode rods, and an electric current is passed between the electrode rods.
  • the resistance heat generated on the contact surfaces causes the metal materials near the contact surfaces to melt and solidify. up and join together.
  • This spot welding is often used to join the structural materials of the vehicle body in the production of vehicles, and in order to maintain the existing production line and produce vehicles, the panel materials used must be able to be spot-welded. Something is required.
  • roof panels and floor panels are required to be lightweight and rigid enough not to deform when pressed.
  • braces hinders weight reduction, so instead of providing braces, it is being considered to use a multi-layer panel in which a resin material is sandwiched between thin steel plates to create a lightweight and highly rigid panel material.
  • panel materials in which a resin material is sandwiched between steel sheets have a problem in electrical conductivity during spot welding, and are difficult to adopt as structural materials for vehicle bodies.
  • the present invention has been proposed to deal with such circumstances, and an object of the present invention is to provide a lightweight and highly rigid panel material that can be spot welded.
  • one embodiment of the present invention is a multi-layer panel comprising an outer layer of steel material and a resin material layer, wherein the resin material layer is partially applied to a joint planned by spot welding. It is characterized by providing a removed electrified portion.
  • spot welding becomes possible by applying an electrode rod to the electrically conductive portion from which the resin material layer is partially removed, and a lightweight and highly rigid panel material can be provided.
  • FIG. 1 is an overall perspective view of a multilayer panel according to an embodiment of the present invention
  • FIG. 1 is an overall plan view of a multilayer panel according to an embodiment of the present invention
  • FIG. The whole perspective view of the multilayer panel which concerns on other embodiment of this invention.
  • Explanatory drawing which shows the joining process of a multilayer panel (before spot welding).
  • Explanatory drawing which shows the joining process of a multilayer panel (at the time of spot welding).
  • Explanatory drawing which shows the joining process of a multilayer panel at the time of spot welding.
  • Explanatory drawing which shows the joining process of a multilayer panel after spot welding).
  • FIG. 4 is a plan view showing a state in which a multi-layer panel having striped resin layers is spot-welded.
  • FIG. 4 is a plan view showing a state in which a multi-layer panel having a mesh-like resin layer is spot-welded.
  • FIG. 4 is an explanatory view showing a state before joining a roof panel, a floor panel, and a toe board as a multilayer panel to a vehicle body frame.
  • a multi-layer panel for spot welding (hereinafter simply referred to as a multi-layer panel) 1 includes an outer layer 1A and a resin material layer 1B.
  • the outer layer 1A of the multilayer panel 1 is a thin plate-shaped steel material.
  • the thickness of the outer layer 1A is set according to the allowable weight of the outer layer 1A, and the thickness of the outer layer 1A is made thinner in order to reduce the weight.
  • the thickness of the outer layer 1A can be set to, for example, about 0.2 to 0.4 mm.
  • the resin material layer 1B of the multilayer panel 1 is integrally molded with the outer layer 1A, or attached to the outer layer 1A with an adhesive or the like.
  • the material of the resin material layer 1B is selected according to the application of the multilayer panel 1. As shown in FIG.
  • materials with excellent vibration damping properties such as engineering plastics such as polyamide (PA) and polyurethane (PU), general-purpose plastics, elastomers, and rubbers, can be used.
  • Polypropylene (PP), ABS resin, or the like can be used when strength and rigidity are required for the multilayer panel 1 .
  • the material of the resin material layer 1B is not limited to this, and can be freely selected from a thermoplastic resin or a thermosetting resin according to the purpose. Also, the form of the resin may be solid or foamed.
  • the layer thickness of the resin material layer 1B can also be appropriately set according to the desired function, and when used as a vehicle roof panel or floor panel, it can be set to 0.04 mm or more, for example.
  • the planned joining points J for spot welding are specified in advance.
  • the planned joining point J may be specified by a point as shown in FIG. 2, or may be specified by an area extending to some extent.
  • the multi-layer panel 1 is provided with a conductive portion 10 obtained by partially removing the resin material layer 1B at such a joint planned portion J. As shown in FIG.
  • This energizable portion 10 can be provided, for example, so as to surround the joint planned portion J described above.
  • the planned joining point J is specified by a point, it is provided so as to surround the point, and when the planned joining point J is specified by an area, it is provided so as to surround or match the area. be able to.
  • the energizable parts 10 may be arranged dispersedly at a plurality of locations as shown in the drawing, or may be extended along the outer edge of the multilayer panel 1 as a continuous area, for example.
  • the resin material layer 1B of the multi-layer panel 1 is formed with a notch wall N around the conductive parts 10 .
  • the resin material layer 1B has the resin material removed inside the notch wall N, and the steel material surface of the outer layer 1A is exposed in the conductive portion 10 .
  • the multilayer panel 1 is formed by providing a single outer layer 1A and a single resin material layer 1B, but as shown in FIG.
  • the multilayer panel 1 may be formed in a state in which one layer of the resin material layer 1B is sandwiched between the two (three layers in total).
  • the outer layer 1A and the resin material layer 1B are integrally cut or pressed, and then the resin material layer 1B is partially scraped off to form the conductive portion 10. can be formed.
  • the energizable portion 10 by partially scraping off the resin material layer 1B after cutting or pressing, there is no misalignment with respect to the planned joining portion J where spot welding is predetermined.
  • An electrically conductive portion 10 can be formed.
  • FIG. 4A to 4C show a method of joining the two-layered multi-layer panel 1 shown in FIG.
  • the multilayer panel 1 is placed on the substrate B as shown in FIG. 4A.
  • electrode rods S1 and S2 are brought into contact with the planned joining portion J so that the conductive portion 10 of the multilayer panel 1 is in contact with the base material B, and the electrodes S1 and S2 are connected.
  • the conductive portion 10 of the multilayer panel 1 and the base material B are pressurized.
  • 5A to 5C show a joining method for the three-layered multi-layer panel 1 shown in FIG.
  • the multilayer panel 1 is attached to the base material B as shown in FIG. overlap.
  • the electrode rods are attached to the planned joining points J so that the conductive portions 10 respectively provided on the two outer layers 1A of the multilayer panel 1 are in contact with each other and are in contact with the base material B.
  • S1 and S2 are applied to pressurize the pair of conductive parts 10 of the multilayer panel 1 and the substrate B between the electrode rods S1 and S2.
  • the resin material layer 1B covers the entire surface of the outer layer 1A except for the conductive portion 10, but the resin material layer 1B is not limited to such a form.
  • the material layer 1B may be provided with an appropriate form of lightening at an appropriate location.
  • the resin material layers 1B are arranged in a stripe shape (a strip shape) in a plan view.
  • a plurality of linear resin material layers 1B having a width W are arranged at intervals T along one side of a rectangular outer layer 1A.
  • one resin material layer 1B is arranged linearly, but it may be arranged in a curved line with a predetermined curvature.
  • the portions between the resin material layers 1B arranged in stripes are hollowed portions, and these portions are the conductive portions 10 .
  • the conductive portions 10 since a relatively wide area of the hollowed out portion of the resin material layer 1B becomes the conductive portion 10, an arbitrary position in the conductive portion 10 can be set as the planned joining point J. . As a result, restrictions on the positions and numbers of the planned joining points J can be reduced.
  • the resin material layers 1B are arranged in a mesh shape (network shape) in plan view.
  • a mesh-like lightening is formed by forming a linear resin material layer along two orthogonal sides of a rectangular outer layer 1A.
  • the mesh-shaped hollow space is narrowed in the central portion of the outer layer 1A in plan view, and the mesh-shaped hollow space is widened in the plan view peripheral portion of the outer layer 1A. are doing.
  • a plan view peripheral portion of the outer layer 1A, which is widely hollowed out, is used as a conductive portion 10, and a joint planned portion J is set therein.
  • the density of the resin material layers 1B can be increased, and the rigidity of the multilayer panel 1 can be increased.
  • the conductive portion 10 can be widened, and the restrictions on the position and number of the planned joining points J can be reduced.
  • the weight of the multilayer panel 1 can be reduced by combining the outer layer 1A made of a relatively thin steel plate and the resin material layer 1B with a low specific gravity. Since the resin material layer 1B can ensure a predetermined rigidity, the multilayer panel 1 can obtain a high rigidity compared to a panel made of a single thin steel plate. Depending on the material of the resin material, it is possible to ensure functionality such as damping properties.
  • the rigidity (bending rigidity) of the multilayer panel 1 can be increased by increasing the section modulus of the entire multilayer panel 1 .
  • the resin material layer 1B is partially removed to form the conductive portion 10, so that spot welding can be performed by setting the planned joining point J within the conductive portion 10 without positional deviation. Become. At this time, since high rigidity is obtained by welding the conductive portion 10 to the base material B, the removal of the resin material layer 1B will not cause an influence such as reduction in rigidity.
  • Such a multilayer panel 1 can be used as a roof panel, a floor panel, a toe board, etc. in a vehicle frame structure.
  • FIG. 8 shows the multi-layer panel 1 as a roof panel RP, a floor panel FP, and a toe board TB, before being joined to the vehicle body frame F, which is the base material B.
  • the roof panel RP, the floor panel FP, and the toe board TB can be made lightweight and highly rigid, and the roof panel RP and the floor
  • the panel FP and toe board TB can be joined to the vehicle body frame F by spot welding.
  • 1 multi-layer panel
  • 1A outer layer
  • 1B resin material layer
  • 10 energizable part
  • J scheduled joint location
  • N notch wall
  • B base material
  • S1, S2 electrode rods
  • M molten solidified portion
  • RP roof panel
  • FP floor panel
  • TB toe board
  • F body frame

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

Provided is a low-weight and high-rigidity panel member that can be spot-welded. This multilayer panel for spot-welding comprises a steel-member outer layer and a resin-member layer, wherein an electricity-conductible part from which the resin-member layer is partially removed is provided at a location to be joined through spot-welding.

Description

スポット溶接用複層パネル、パネル接合構造Multi-layer panel for spot welding, panel joint structure
　本発明は、スポット溶接用複層パネル、パネル接合構造に関するものである。 The present invention relates to a multi-layer panel for spot welding and a panel joint structure.
　鋼製のパネル材としては、防音や制振機能或いは軽量化のために、鋼板の間に樹脂材を挟んだものが知られている。パネル材は、構造材として用いる際には、溶接での施工性に優れていることが求められるが、鋼板の間に樹脂材を挟むと、溶接時の熱による溶接欠陥の原因になるため、その対策が検討されている。 As a steel panel material, it is known that a resin material is sandwiched between steel plates for soundproofing, damping function, or weight reduction. Panel materials are required to have excellent welding workability when used as structural materials. Countermeasures are being considered.
　従来、一対の鋼板の間に樹脂材を挟んだパネル材では、鋼板の四辺のうち少なくとも一辺において、樹脂材の外側に、溶融又は分解温度が１０５０℃以上の耐熱性材料からなるインシュレーターを配置したものが知られている（下記特許文献１参照）。 Conventionally, in a panel material in which a resin material is sandwiched between a pair of steel plates, an insulator made of a heat-resistant material having a melting or decomposition temperature of 1050° C. or higher is arranged outside the resin material on at least one of the four sides of the steel plate. is known (see Patent Document 1 below).
特開平１１－２５４５８３号公報JP-A-11-254583
　前述した従来技術は、インシュレーターを配置した箇所を溶接箇所として、隅肉溶接や突き合わせ溶接を行うことができる。しかしながら、スポット溶接を行う場合には、一対の鋼板間のインシュレーターがスポット溶接時の通電を妨げるので、スポット溶接を採用する構造材としては用いることができない。 In the conventional technology described above, fillet welding and butt welding can be performed using the location where the insulator is arranged as the welding location. However, when spot welding is performed, the insulator between the pair of steel plates prevents current flow during spot welding, so it cannot be used as a structural material for spot welding.
　スポット溶接（抵抗スポット溶接）は、接合対象の一対の金属材を電極棒で加圧しながら、電極棒間に通電することで接触面に発生する抵抗熱により、接触面付近の金属材が溶解凝固を起こして互いに接合する。このスポット溶接は、車両の生産では車体の構造材の接合で多用されており、既存の生産ラインを維持して車両生産を行うためには、使用するパネル材は、スポット溶接が可能なものであることが求められる。 In spot welding (resistance spot welding), a pair of metal materials to be joined are pressurized by electrode rods, and an electric current is passed between the electrode rods. The resistance heat generated on the contact surfaces causes the metal materials near the contact surfaces to melt and solidify. up and join together. This spot welding is often used to join the structural materials of the vehicle body in the production of vehicles, and in order to maintain the existing production line and produce vehicles, the panel materials used must be able to be spot-welded. Something is required.
　現状、車両のルーフパネルやフロアパネルなどは、スポット溶接の施工性が高い鋼板が用いられ、軽量化のために板厚の薄い鋼板が用いられている。これに対して、ルーフパネルやフロアパネルなどは、軽量化の要求に加えて押圧時に変形しない剛性が求められるので、鋼板に複数のブレース（補強材）を取り付けて剛性を高めることが行われている。 Currently, steel sheets with high workability for spot welding are used for vehicle roof panels and floor panels, and thin steel sheets are used for weight reduction. On the other hand, roof panels and floor panels are required to be lightweight and rigid enough not to deform when pressed. there is
　しかしながら、ブレースの存在が軽量化の妨げになるので、ブレースを設ける代わりに、薄厚の鋼板で樹脂材を挟む複層パネルを用いて、軽量かつ高剛性のパネル材とすることが検討されている。しかし、前述したように、鋼板で樹脂材を挟むパネル材は、スポット溶接時の通電性に問題があり、車体の構造材としては採用し難い問題があった。 However, the presence of braces hinders weight reduction, so instead of providing braces, it is being considered to use a multi-layer panel in which a resin material is sandwiched between thin steel plates to create a lightweight and highly rigid panel material. . However, as described above, panel materials in which a resin material is sandwiched between steel sheets have a problem in electrical conductivity during spot welding, and are difficult to adopt as structural materials for vehicle bodies.
　本発明は、このような事情に対処するために提案されたものであり、本発明の課題は、スポット溶接が可能で、軽量かつ高剛性のパネル材を提供することにある。 The present invention has been proposed to deal with such circumstances, and an object of the present invention is to provide a lightweight and highly rigid panel material that can be spot welded.
　このような課題を解決するために、本発明の一実施形態は、鋼材の外層と樹脂材層を備える複層パネルであって、スポット溶接による接合予定箇所に、前記樹脂材層を部分的に除去した通電可能部を設けたことを特徴とする。 In order to solve such problems, one embodiment of the present invention is a multi-layer panel comprising an outer layer of steel material and a resin material layer, wherein the resin material layer is partially applied to a joint planned by spot welding. It is characterized by providing a removed electrified portion.
　このような特徴によると、樹脂材層を部分的に除去した通電可能部に電極棒を当てることで、スポット溶接が可能になり、しかも、軽量かつ高剛性のパネル材を提供することができる。 According to these features, spot welding becomes possible by applying an electrode rod to the electrically conductive portion from which the resin material layer is partially removed, and a lightweight and highly rigid panel material can be provided.
本発明の実施形態に係る複層パネルの全体斜視図。1 is an overall perspective view of a multilayer panel according to an embodiment of the present invention; FIG. 本発明の実施形態に係る複層パネルの全体平面図。1 is an overall plan view of a multilayer panel according to an embodiment of the present invention; FIG. 本発明の他の実施形態に係る複層パネルの全体斜視図。The whole perspective view of the multilayer panel which concerns on other embodiment of this invention. 複層パネルの接合工程を示す説明図（スポット溶接前）。Explanatory drawing which shows the joining process of a multilayer panel (before spot welding). 複層パネルの接合工程を示す説明図（スポット溶接時）。Explanatory drawing which shows the joining process of a multilayer panel (at the time of spot welding). 複層パネルの接合工程を示す説明図（スポット溶接後）。Explanatory drawing which shows the joining process of a multilayer panel (after spot welding). 複層パネルの接合工程を示す説明図（スポット溶接前）。Explanatory drawing which shows the joining process of a multilayer panel (before spot welding). 複層パネルの接合工程を示す説明図（スポット溶接時）。Explanatory drawing which shows the joining process of a multilayer panel (at the time of spot welding). 複層パネルの接合工程を示す説明図（スポット溶接後）。Explanatory drawing which shows the joining process of a multilayer panel (after spot welding). ストライプ状の樹脂層を備えた複層パネルがスポット溶接された状態を示す平面図。FIG. 4 is a plan view showing a state in which a multi-layer panel having striped resin layers is spot-welded. メッシュ状の樹脂層を備えた複層パネルがスポット溶接された状態を示す平面図。FIG. 4 is a plan view showing a state in which a multi-layer panel having a mesh-like resin layer is spot-welded. 複層パネルをルーフパネルやフロアパネルやトーボードとして、これらを車体フレームに接合する前の状態を示す説明図。FIG. 4 is an explanatory view showing a state before joining a roof panel, a floor panel, and a toe board as a multilayer panel to a vehicle body frame.
　以下、図面を参照して本発明の実施形態を説明する。以下の説明で、異なる図における同一符号は同一機能の部位を示しており、各図における重複説明は適宜省略する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals in different figures denote portions having the same function, and duplication of description in each figure will be omitted as appropriate.
　図１及び図２に示すように、スポット溶接用複層パネル（以下、単に複層パネルという。）１は、外層１Ａと樹脂材層１Ｂを備えている。複層パネル１の外層１Ａは、薄厚の板状の鋼材である。外層１Ａの板厚は、外層１Ａの許容重量に応じて設定され、軽量化を図るためには、外層１Ａの板厚は、より薄くなる。車両のルーフパネルやフロアパネルとして用いる場合には、外層１Ａの板厚は、例えば、０．２～０．４ｍｍ程度に設定することができる。 As shown in FIGS. 1 and 2, a multi-layer panel for spot welding (hereinafter simply referred to as a multi-layer panel) 1 includes an outer layer 1A and a resin material layer 1B. The outer layer 1A of the multilayer panel 1 is a thin plate-shaped steel material. The thickness of the outer layer 1A is set according to the allowable weight of the outer layer 1A, and the thickness of the outer layer 1A is made thinner in order to reduce the weight. When used as a vehicle roof panel or floor panel, the thickness of the outer layer 1A can be set to, for example, about 0.2 to 0.4 mm.
　複層パネル１の樹脂材層１Ｂは、外層１Ａに対して一体成形されるか、或いは外層１Ａに接着剤などで貼り付けられる。樹脂材層１Ｂの材料は、複層パネル１の用途に応じて選択される。複層パネル１に制振性を求める場合には、振動減衰に優れた材料、例えば、ポリアミド（ＰＡ）やポリウレタン（ＰＵ）などのエンジニアリングプラスチック、汎用プラスチック、エラストマー、ゴム等を用いることができる。複層パネル１に強度や剛性を求める場合には、ポリプロピレン（ＰＰ）やＡＢＳ樹脂などを用いることができる。樹脂材層１Ｂの材質はこの限りではなく、熱可塑型樹脂や熱硬化型樹脂のいずれであっても目的に合わせて自由に選択することができる。また樹脂の形態は、ソリッドであても発泡であってもよい。樹脂材層１Ｂの層厚も求める機能に応じて適宜設定することができ、車両のルーフパネルやフロアパネルとして用いる場合には、例えば、０．０４ｍｍ以上に設定することができる。 The resin material layer 1B of the multilayer panel 1 is integrally molded with the outer layer 1A, or attached to the outer layer 1A with an adhesive or the like. The material of the resin material layer 1B is selected according to the application of the multilayer panel 1. As shown in FIG. When the multilayer panel 1 is required to have damping properties, materials with excellent vibration damping properties, such as engineering plastics such as polyamide (PA) and polyurethane (PU), general-purpose plastics, elastomers, and rubbers, can be used. Polypropylene (PP), ABS resin, or the like can be used when strength and rigidity are required for the multilayer panel 1 . The material of the resin material layer 1B is not limited to this, and can be freely selected from a thermoplastic resin or a thermosetting resin according to the purpose. Also, the form of the resin may be solid or foamed. The layer thickness of the resin material layer 1B can also be appropriately set according to the desired function, and when used as a vehicle roof panel or floor panel, it can be set to 0.04 mm or more, for example.
　複層パネル１は、スポット溶接を行うための接合予定箇所Ｊが予め特定されている。この接合予定箇所Ｊは、図２に示すように点で特定されていてもよいし、ある程度広がりのある領域で特定されていてもよい。そして、複層パネル１は、このような接合予定箇所Ｊに、樹脂材層１Ｂを部分的に除去した通電可能部１０を設けている。 In the multi-layer panel 1, the planned joining points J for spot welding are specified in advance. The planned joining point J may be specified by a point as shown in FIG. 2, or may be specified by an area extending to some extent. The multi-layer panel 1 is provided with a conductive portion 10 obtained by partially removing the resin material layer 1B at such a joint planned portion J. As shown in FIG.
　この通電可能部１０は、例えば、前述した接合予定箇所Ｊを囲むように設けることができる。接合予定箇所Ｊが点で特定されている場合には、その点を囲むように、接合予定箇所Ｊが領域で特定されている場合には、その領域を囲むか或いはその領域に合わせるように設けることができる。また、通電可能部１０は、図示のように、複数個所に分散して配置してもよいし、連続した領域として、例えば、複層パネル１の外縁に沿って延設してもよい。 This energizable portion 10 can be provided, for example, so as to surround the joint planned portion J described above. When the planned joining point J is specified by a point, it is provided so as to surround the point, and when the planned joining point J is specified by an area, it is provided so as to surround or match the area. be able to. Also, the energizable parts 10 may be arranged dispersedly at a plurality of locations as shown in the drawing, or may be extended along the outer edge of the multilayer panel 1 as a continuous area, for example.
　図示のように、通電可能部１０を分散して配置した場合には、複層パネル１の樹脂材層１Ｂは、通電可能部１０の周囲に切り欠き壁Ｎが形成されている。そして、樹脂材層１Ｂは、切り欠き壁Ｎの内側で樹脂材が除去されていて、通電可能部１０では、外層１Ａの鋼材表面が露出した状態になっている。 As shown in the figure, when the conductive parts 10 are arranged in a distributed manner, the resin material layer 1B of the multi-layer panel 1 is formed with a notch wall N around the conductive parts 10 . The resin material layer 1B has the resin material removed inside the notch wall N, and the steel material surface of the outer layer 1A is exposed in the conductive portion 10 .
　図１に示した例では、外層１Ａと樹脂材層１Ｂをそれぞれ単層設けて複層パネル１を形成しているが、図３に示すように、２層の（一対の）外層１Ａの間に１層の樹脂材層１Ｂを挟んだ状態（合わせて３層）で複層パネル１を形成してもよい。 In the example shown in FIG. 1, the multilayer panel 1 is formed by providing a single outer layer 1A and a single resin material layer 1B, but as shown in FIG. The multilayer panel 1 may be formed in a state in which one layer of the resin material layer 1B is sandwiched between the two (three layers in total).
　図１及び図３に示した複層パネル１は、外層１Ａと樹脂材層１Ｂを一体にして切断やプレス加工を行った後に、樹脂材層１Ｂを部分的に削り取ることで、通電可能部１０を形成することができる。このように、切断やプレス加工後に樹脂材層１Ｂの部分的な削り取りで通電可能部１０を形成することで、スポット溶接を行うことが予め定められている接合予定箇所Ｊに対して位置ズレなく通電可能部１０を形成することができる。 In the multilayer panel 1 shown in FIGS. 1 and 3, the outer layer 1A and the resin material layer 1B are integrally cut or pressed, and then the resin material layer 1B is partially scraped off to form the conductive portion 10. can be formed. In this way, by forming the energizable portion 10 by partially scraping off the resin material layer 1B after cutting or pressing, there is no misalignment with respect to the planned joining portion J where spot welding is predetermined. An electrically conductive portion 10 can be formed.
　図４Ａ～図４Ｃに、図１に示した２層の複層パネル１の接合方法を示している。単層の外層１Ａと樹脂材層１Ｂを有する複層パネル１を基材Ｂにスポット溶接するには、図４Ａに示すように、基材Ｂに複層パネル１を重ねる。次に、図４Ｂに示すように、複層パネル１の通電可能部１０が基材Ｂに接触するように、接合予定箇所Ｊに電極棒Ｓ１，Ｓ２を当てて、電極棒Ｓ１，Ｓ２間で複層パネル１の通電可能部１０と基材Ｂを加圧する。その後、電極棒Ｓ１，Ｓ２間に電流を流すことで、図４Ｃに示すように、複層パネル１の通電可能部１０と基材Ｂとの接触面に溶融凝固部Ｍを形成する。これによって、複層パネル１が基材Ｂにスポット溶接されたパネル接合構造が得られる。 4A to 4C show a method of joining the two-layered multi-layer panel 1 shown in FIG. In order to spot weld the multilayer panel 1 having the single outer layer 1A and the resin material layer 1B to the substrate B, the multilayer panel 1 is placed on the substrate B as shown in FIG. 4A. Next, as shown in FIG. 4B, electrode rods S1 and S2 are brought into contact with the planned joining portion J so that the conductive portion 10 of the multilayer panel 1 is in contact with the base material B, and the electrodes S1 and S2 are connected. The conductive portion 10 of the multilayer panel 1 and the base material B are pressurized. Thereafter, a current is passed between the electrode rods S1 and S2 to form a molten solidified portion M on the contact surface between the conductive portion 10 of the multilayer panel 1 and the substrate B, as shown in FIG. 4C. As a result, a panel joint structure in which the multilayer panel 1 is spot-welded to the base material B is obtained.
　図５Ａ～図５Ｃには、図３に示した３層の複層パネル１の接合方法を示している。２層の外層１Ａが樹脂材層１Ｂを挟んだ複層パネル１を基材Ｂにスポット溶接するには、前述した例と同様に、図５Ａに示すように、基材Ｂに複層パネル１を重ねる。そして、図５Ｂに示すように、複層パネル１における２層の外層１Ａにそれぞれ設けた通電可能部１０が互いに接触し、これらが基材Ｂに接触するように、接合予定箇所Ｊに電極棒Ｓ１，Ｓ２を当てて、電極棒Ｓ１，Ｓ２間で複層パネル１の一対の通電可能部１０と基材Ｂを加圧する。その後、電極棒Ｓ１，Ｓ２間に電流を流すことで（図５Ｂ参照）、複層パネル１の一対の通電可能部１０と基材Ｂとの３層が接触した接触面に溶融凝固部Ｍを形成する。これによって、３層の複層パネル１が基材Ｂにスポット溶接されたパネル接合構造が得られる。 5A to 5C show a joining method for the three-layered multi-layer panel 1 shown in FIG. In order to spot-weld the multilayer panel 1 in which the resin material layer 1B is sandwiched between the two outer layers 1A to the base material B, the multilayer panel 1 is attached to the base material B as shown in FIG. overlap. Then, as shown in FIG. 5B , the electrode rods are attached to the planned joining points J so that the conductive portions 10 respectively provided on the two outer layers 1A of the multilayer panel 1 are in contact with each other and are in contact with the base material B. S1 and S2 are applied to pressurize the pair of conductive parts 10 of the multilayer panel 1 and the substrate B between the electrode rods S1 and S2. After that, by passing an electric current between the electrode rods S1 and S2 (see FIG. 5B), a molten solidified portion M is formed on the contact surface where the three layers of the pair of conductive portions 10 of the multilayer panel 1 and the base material B are in contact. Form. As a result, a panel joint structure in which the three-layered multilayer panel 1 is spot-welded to the base material B is obtained.
　図１又は図３に示した複層パネル１の例は、外層１Ａの一面における通電可能部１０を除く部分を、全て樹脂材層１Ｂで覆っているが、このような形態に限らず、樹脂材層１Ｂには、適当な箇所に適宜の形態の肉抜きを設けてもよい。 In the example of the multi-layer panel 1 shown in FIG. 1 or FIG. 3, the resin material layer 1B covers the entire surface of the outer layer 1A except for the conductive portion 10, but the resin material layer 1B is not limited to such a form. The material layer 1B may be provided with an appropriate form of lightening at an appropriate location.
　図６に示した複層パネル１は、樹脂材層１Ｂを平面視でストライプ状（短冊状）に配置している。この例では、矩形状の外層１Ａの一辺に沿って幅Ｗで線状の樹脂材層１Ｂを間隔Ｔだけ空けて複数配置している。図示の例では、一本の樹脂材層１Ｂを直線的に配置しているが、所定の湾曲を持たせた曲線状に配置してもよい。 In the multilayer panel 1 shown in FIG. 6, the resin material layers 1B are arranged in a stripe shape (a strip shape) in a plan view. In this example, a plurality of linear resin material layers 1B having a width W are arranged at intervals T along one side of a rectangular outer layer 1A. In the illustrated example, one resin material layer 1B is arranged linearly, but it may be arranged in a curved line with a predetermined curvature.
　図６に示した例では、ストライプ状に配置された樹脂材層１Ｂの間の部分が肉抜きされた部分であり、その部分が通電可能部１０になっている。この例では、樹脂材層１Ｂの肉抜きされた部分の比較的広い領域が通電可能部１０になるので、その通電可能部１０の中の任意の位置を接合予定箇所Ｊに設定することができる。これによって、接合予定箇所Ｊの位置や数の制約を少なくすることができる。 In the example shown in FIG. 6, the portions between the resin material layers 1B arranged in stripes are hollowed portions, and these portions are the conductive portions 10 . In this example, since a relatively wide area of the hollowed out portion of the resin material layer 1B becomes the conductive portion 10, an arbitrary position in the conductive portion 10 can be set as the planned joining point J. . As a result, restrictions on the positions and numbers of the planned joining points J can be reduced.
　図７に示した複層パネル１は、樹脂材層１Ｂを平面視でメッシュ状（網目状）に配置している。この例では、矩形状の外層１Ａの直交する２辺に沿って線状の樹脂材層を形成することで網目状の肉抜きを形成している。また、図７に示した例では、外層１Ａの平面視中央部分で網目状に肉抜きされた間隔を狭くしており、外層１Ａの平面視周縁部分で網目状に肉抜きされた間隔を広くしている。そして、広く肉抜きされた外層１Ａの平面視周縁部分を通電可能部１０として、その中に接合予定箇所Ｊを設定している。 In the multilayer panel 1 shown in FIG. 7, the resin material layers 1B are arranged in a mesh shape (network shape) in plan view. In this example, a mesh-like lightening is formed by forming a linear resin material layer along two orthogonal sides of a rectangular outer layer 1A. In addition, in the example shown in FIG. 7 , the mesh-shaped hollow space is narrowed in the central portion of the outer layer 1A in plan view, and the mesh-shaped hollow space is widened in the plan view peripheral portion of the outer layer 1A. are doing. A plan view peripheral portion of the outer layer 1A, which is widely hollowed out, is used as a conductive portion 10, and a joint planned portion J is set therein.
　このような例では、外層１Ａの平面視中央部分で網目状の肉抜き間隔を狭くすることで、樹脂材層１Ｂの配置密度を高くして、複層パネル１の剛性を高めることができ、外層１Ａの平面視周縁部分で網目上の肉抜き幅を広くすることで、通電可能部１０を広くとって、接合予定箇所Ｊの位置や数の制約を少なくすることができる。 In such an example, by narrowing the spacing between the mesh-like cutouts in the central portion of the outer layer 1A in plan view, the density of the resin material layers 1B can be increased, and the rigidity of the multilayer panel 1 can be increased. By widening the cut-out width on the mesh in the peripheral portion of the outer layer 1A in a plan view, the conductive portion 10 can be widened, and the restrictions on the position and number of the planned joining points J can be reduced.
　このような複層パネル１は、比較的薄厚の鋼板からなる外層１Ａと低比重の樹脂材層１Ｂを組み合わせることで、複層パネル１の軽量化が可能になる。そして、複層パネル１は、樹脂材層１Ｂによって所定の剛性を確保することができるので、薄厚の鋼板単体のパネルと比較して、高い剛性を得ることができ、樹脂材層１Ｂで使用する樹脂材の材質によって、制振性などの機能性を担保することができる。 With such a multilayer panel 1, the weight of the multilayer panel 1 can be reduced by combining the outer layer 1A made of a relatively thin steel plate and the resin material layer 1B with a low specific gravity. Since the resin material layer 1B can ensure a predetermined rigidity, the multilayer panel 1 can obtain a high rigidity compared to a panel made of a single thin steel plate. Depending on the material of the resin material, it is possible to ensure functionality such as damping properties.
　特に、２層の（一対の）外層１Ａの間に樹脂材層１Ｂを挟む構造にすることで、鋼材からなる一対の外層１Ａの間にスペーサを介在させた構造になり、樹脂材層１Ｂ自体が高い剛性を有しない場合であっても、複層パネル１全体の断面係数を高めて複層パネル１の剛性（曲げ剛性）を高めることができる。 In particular, by sandwiching the resin material layer 1B between two (a pair of) outer layers 1A, a spacer is interposed between the pair of steel outer layers 1A, and the resin material layer 1B itself is formed. Even if the core does not have high rigidity, the rigidity (bending rigidity) of the multilayer panel 1 can be increased by increasing the section modulus of the entire multilayer panel 1 .
　そして、複層パネル１は、樹脂材層１Ｂを部分的に除去して通電可能部１０を形成することで、通電可能部１０内に位置ズレなく接合予定箇所Ｊを設定したスポット溶接が可能になる。この際、通電可能部１０は基材Ｂに溶接されることで高い剛性が得られるので、樹脂材層１Ｂを除去することによる剛性低下等の影響は生じないことになる。 In the multilayer panel 1, the resin material layer 1B is partially removed to form the conductive portion 10, so that spot welding can be performed by setting the planned joining point J within the conductive portion 10 without positional deviation. Become. At this time, since high rigidity is obtained by welding the conductive portion 10 to the base material B, the removal of the resin material layer 1B will not cause an influence such as reduction in rigidity.
　このような複層パネル１は、車両のフレーム構造において、ルーフパネルやフロアパネル、トーボードなどとして用いることができる。図８には、複層パネル１をルーフパネルＲＰやフロアパネルＦＰやトーボードＴＢとして、これらを基材Ｂである車体フレームＦに接合する前の状態を示している。このようにルーフパネルＲＰやフロアパネルＦＰやトーボードＴＢに複層パネル１を用いることで、軽量かつ剛性の高いルーフパネルＲＰやフロアパネルＦＰやトーボードＴＢとすることができると共に、ルーフパネルＲＰやフロアパネルＦＰやトーボードＴＢをスポット溶接で車体フレームＦに接合することができる。 Such a multilayer panel 1 can be used as a roof panel, a floor panel, a toe board, etc. in a vehicle frame structure. FIG. 8 shows the multi-layer panel 1 as a roof panel RP, a floor panel FP, and a toe board TB, before being joined to the vehicle body frame F, which is the base material B. As shown in FIG. By using the multi-layer panel 1 for the roof panel RP, the floor panel FP, and the toe board TB in this way, the roof panel RP, the floor panel FP, and the toe board TB can be made lightweight and highly rigid, and the roof panel RP and the floor The panel FP and toe board TB can be joined to the vehicle body frame F by spot welding.
　以上、本発明の実施の形態について図面を参照して詳述してきたが、具体的な構成はこれらの実施の形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計の変更等があっても本発明に含まれる。また、上述の各実施の形態は、その目的及び構成等に特に矛盾や問題がない限り、互いの技術を流用して組み合わせることが可能である。 Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and design modifications and the like are made within the scope of the present invention. is included in the present invention. In addition, each of the above-described embodiments can be combined by utilizing each other's techniques unless there is a particular contradiction or problem in the purpose, configuration, or the like.
１：複層パネル，１Ａ：外層，１Ｂ：樹脂材層，１０：通電可能部，
Ｊ：接合予定箇所，Ｎ：切り欠き壁，Ｂ：基材，
Ｓ１，Ｓ２：電極棒，Ｍ：溶融凝固部，
ＲＰ：ルーフパネル，ＦＰ：フロアパネル，ＴＢ：トーボード，
Ｆ：車体フレーム 1: multi-layer panel, 1A: outer layer, 1B: resin material layer, 10: energizable part,
J: scheduled joint location, N: notch wall, B: base material,
S1, S2: electrode rods, M: molten solidified portion,
RP: roof panel, FP: floor panel, TB: toe board,
F: body frame

Claims (6)

  1. 　鋼材の外層と樹脂材層を備える複層パネルであって、
    　スポット溶接による接合予定箇所に、前記樹脂材層を部分的に除去した通電可能部を設けたことを特徴とするスポット溶接用複層パネル。     A multi-layer panel comprising an outer layer of steel material and a layer of resin material,
    A multi-layer panel for spot welding, characterized in that a portion to be joined by spot welding is provided with an electrically conductive portion obtained by partially removing the resin material layer.
  2. 　前記通電可能部は、前記複層パネルの外縁に沿って設けられていることを特徴とする請求項１記載のスポット溶接用複層パネル。 The multi-layer panel for spot welding according to claim 1, wherein the conductive portion is provided along the outer edge of the multi-layer panel.
  3. 　前記樹脂材層は、平面視でメッシュ状又はストライプ状に配置されていることを特徴とする請求項１又は２記載のスポット溶接用複層パネル。 The multi-layer panel for spot welding according to claim 1 or 2, characterized in that the resin material layers are arranged in a mesh shape or a stripe shape in plan view.
  4. 　前記外層は、前記樹脂材層を挟む一対の層であることを特徴とする請求項１～３のいずれか１項記載のスポット溶接用複層パネル。 The multi-layer panel for spot welding according to any one of claims 1 to 3, wherein the outer layers are a pair of layers sandwiching the resin material layer.
  5. 　鋼材の外層と樹脂材層を備える複層パネルを基材にスポット溶接したパネル接合構造であって、
    　前記複層パネルは、スポット溶接箇所に、前記樹脂材層を部分的に除去した通電可能部を備えることを特徴とするパネル溶接構造。     A panel joint structure in which a multi-layer panel having a steel outer layer and a resin material layer is spot-welded to a base material,
    A panel welding structure, wherein the multi-layer panel includes an electrically conductive portion obtained by partially removing the resin material layer at a spot-welded portion.
  6. 　前記複層パネルがルーフパネル又はフロアパネル又はトーボードであり、
    　前記基材が車体フレームであることを特徴とする請求項５記載のパネル接合構造。     The multi-layer panel is a roof panel, a floor panel, or a toe board,
    6. The panel joint structure according to claim 5, wherein the base material is a vehicle body frame.
PCT/JP2021/032430 2021-09-03 2021-09-03 Multilayer panel for spot-welding, and panel joining structure WO2023032149A1 (en)

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Publication number Priority date Publication date Assignee Title
JPS60166534U (en) * 1984-04-16 1985-11-05 三菱自動車工業株式会社 sand german steel plate
JPS60179434U (en) * 1984-05-11 1985-11-28 トヨタ自動車株式会社 laminated steel plate
US4791765A (en) * 1981-12-28 1988-12-20 Ford Motor Company Synthetic material structural body panel
JPH04257432A (en) * 1991-02-08 1992-09-11 Kobe Steel Ltd Damping laminated metal plate with superior weldability
JPH05111978A (en) * 1991-02-21 1993-05-07 Kawasaki Steel Corp Production of composite damping material
JP2016059954A (en) * 2014-09-19 2016-04-25 新日鐵住金株式会社 Resistance spot welding method
JP2018501984A (en) * 2014-12-18 2018-01-25 オウトクンプ オサケイティオ ユルキネンＯｕｔｏｋｕｍｐｕ Ｏｙｊ Method for manufacturing sandwich panel

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Publication number Priority date Publication date Assignee Title
US4791765A (en) * 1981-12-28 1988-12-20 Ford Motor Company Synthetic material structural body panel
JPS60166534U (en) * 1984-04-16 1985-11-05 三菱自動車工業株式会社 sand german steel plate
JPS60179434U (en) * 1984-05-11 1985-11-28 トヨタ自動車株式会社 laminated steel plate
JPH04257432A (en) * 1991-02-08 1992-09-11 Kobe Steel Ltd Damping laminated metal plate with superior weldability
JPH05111978A (en) * 1991-02-21 1993-05-07 Kawasaki Steel Corp Production of composite damping material
JP2016059954A (en) * 2014-09-19 2016-04-25 新日鐵住金株式会社 Resistance spot welding method
JP2018501984A (en) * 2014-12-18 2018-01-25 オウトクンプ オサケイティオ ユルキネンＯｕｔｏｋｕｍｐｕ Ｏｙｊ Method for manufacturing sandwich panel

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