WO2015133099A1 - Procédé de soudage par points du type à résistance - Google Patents

Procédé de soudage par points du type à résistance Download PDF

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Publication number
WO2015133099A1
WO2015133099A1 PCT/JP2015/001001 JP2015001001W WO2015133099A1 WO 2015133099 A1 WO2015133099 A1 WO 2015133099A1 JP 2015001001 W JP2015001001 W JP 2015001001W WO 2015133099 A1 WO2015133099 A1 WO 2015133099A1
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WO
WIPO (PCT)
Prior art keywords
plate
aluminum
electrode
aluminum plate
steel
Prior art date
Application number
PCT/JP2015/001001
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English (en)
Japanese (ja)
Inventor
央海 澤西
松田　広志
池田　倫正
Original Assignee
Ｊｆｅスチール株式会社
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 Ｊｆｅスチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to JP2015528472A priority Critical patent/JP6360056B2/ja
Publication of WO2015133099A1 publication Critical patent/WO2015133099A1/fr

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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
    • B23K11/16—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded
    • B23K11/20—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded of different metals
    • 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
    • B23K11/30—Features relating to electrodes
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/006—Vehicles
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/18—Dissimilar materials
    • B23K2103/20—Ferrous alloys and aluminium or alloys thereof

Definitions

  • the present invention relates to a resistance spot welding method, and more specifically, to a resistance spot welding method of a plate assembly in which a steel plate and an aluminum plate are overlapped.
  • the aluminum plate is a general term for a pure aluminum plate and an aluminum alloy plate.
  • the resistance spot welding method which is superior in cost and efficiency compared to other welding methods, is most often used for joining steel plates in a vehicle body, and the number of hit points per unit is 3000 to 6000 points. It extends to.
  • this method two or more stacked steel plates are sandwiched and pressed with a pair of electrodes from above and below, and a high-current welding current is passed between the upper and lower electrodes for a short time to join them by resistance heating.
  • Patent Document 1 discloses resistance spot welding in which welding is performed in an extremely short time and a high current is applied to disperse the melted part to the surroundings, thereby achieving normal contact between metal surfaces and joining by atomic diffusion. A method is described.
  • Patent Document 2 discloses that an iron / aluminum clad thin plate is inserted between a steel plate and an aluminum plate so that the same kind of materials face each other, thereby minimizing the amount of aluminum deposited on the electrode while maintaining high strength even at a low current.
  • a resistance spot welding method is described which provides a joint of
  • Patent Document 3 discloses that welding is performed by attaching one or more contact plates on both sides of a steel plate and an aluminum plate, so that the interface between the contact plate and the material to be joined generates resistance heat, and the steel and aluminum are resistance diffusion bonded. A resistance spot welding method is described in which a high strength joint is obtained.
  • Patent Document 4 it is described that the occurrence of scattering can be suppressed while obtaining a large nugget diameter by optimizing each amount of Mn and Si in the steel plate and the steel plate surface oxide film.
  • the present invention advantageously solves the above-described problem.
  • a current that can be output by a welding transformer generally used in an automobile production line It is an object of the present invention to provide a resistance spot welding method that can secure joint characteristics between a steel plate and an aluminum plate by the same production process as that for joining steel plates.
  • the present invention has the following features.
  • joint characteristics between a steel plate and an aluminum plate can be ensured in the current range that can be output by a welding transformer generally used in an automobile production line, and by the same production process as the joining of steel plates. .
  • FIG. 1 is a diagram illustrating a resistance spot welding method according to an embodiment of the present invention.
  • a plate assembly 3 in which an aluminum plate 1 having a plate thickness t0 and a steel plate 2 having a plate thickness ts are directly superimposed is sandwiched between a pair of electrodes (upper electrode 4 and lower electrode 5) and pressed between the upper and lower electrodes 4 and 5.
  • a high-current welding current is applied for a short time and joined by resistance heating to obtain a resistance spot welded joint between the aluminum plate 1 and the steel plate 2.
  • the tip diameter DFe of the electrode 5 in contact with the steel plate 2 is 4 mm or more, and the tip diameter DAl of the electrode 4 in contact with the aluminum plate 1 is 3 to 16 mm. The effect can be obtained effectively.
  • the tip diameter DFe of the electrode 5 When the tip diameter DFe of the electrode 5 is less than 4 mm, the heat generation diameter on the steel plate 2 side is insufficient. If the tip diameter DAl of the electrode 4 is less than 3 mm, the current density in the aluminum plate 1 is too large, which increases the risk of scattering. If the tip diameter DAl of the electrode 4 exceeds 16 mm, heat removal by the electrode 4 on the aluminum plate 1 side is performed. Therefore, the current value required for joining must be increased.
  • the tip diameter DFe of the electrode 5 is preferably 6 mm or more
  • the tip diameter DAl of the electrode 4 is preferably 4 mm or more and 14 mm or less. More preferably, it is 4.5 mm or more and 12 mm or less.
  • the upper limit of the tip diameter DFe of the electrode 5 is 20 mm in consideration of handling properties and device restrictions. More preferably, it is 18 mm or less.
  • the relationship between the tip diameter DFe of the electrode 5 in contact with the steel plate 2 and the plate thickness tFe of the steel plate 2 satisfies 3tFe ⁇ DFe, and the tip diameter DAl of the electrode 4 in contact with the aluminum plate 1 and the plate thickness tAl of the aluminum plate 1 More preferably, the relationship of 2tAl ⁇ DAl ⁇ 14tAl is satisfied.
  • the above-mentioned effect can be effectively obtained when the tip radius of curvature RAl of the electrode 4 in contact with the aluminum plate 1 exceeds 40 mm. If the tip curvature radius RAl of the electrode 4 is 40 mm or less, the stress applied to the region in contact with the vicinity of the center of the electrode 4 in the aluminum plate 1 becomes excessively large, and the thickness reduction of the aluminum plate 1 in this region becomes significant. It is.
  • the tip curvature radius RAl of the electrode 4 is preferably 50 mm or more. More preferably, it is 55 mm or more.
  • the tip curvature radius RAl of the electrode 4 is preferably 400 mm or less.
  • the tip radius of curvature RAl of the electrode 4 is 200 mm or less.
  • the tip diameter D shown in FIG. 2 becomes the tip diameter DAl of the electrode 4 and is shown in FIG.
  • the tip curvature radius R becomes the tip curvature radius RAl of the electrode 4.
  • the tip diameter D shown in FIG. 2 becomes the tip diameter DFe of the electrode 5, which is shown in FIG.
  • the tip curvature radius R becomes the tip curvature radius RFe of the electrode 5.
  • board thickness t1 of the aluminum plate 1 after welding becomes 20% or less of the plate thickness t0 before welding, and the steel plate 2 after welding.
  • the joining diameter (nugget diameter) x2 of the aluminum plate 1 satisfies x1 ⁇ 0.8 ⁇ x2, there is no problem even if the thickness of the aluminum plate 1 is reduced.
  • the relationship between the thickness t0 (mm) of the aluminum plate 1 before welding and the welded steel plate / aluminum plate joining diameter x2 (mm) is 3 ⁇ t0 ⁇ x2. It is preferable to satisfy. Furthermore, it is more preferable to satisfy the relationship of 3.5 ⁇ t0 ⁇ x2.
  • a two-layered plate assembly (welded joint) of the steel plate 1 and the aluminum plate 2 has been described as an example, but one or more other steel plates or aluminum plates are arranged in any order between the two plates. It can also be applied to a plate assembly (welded joint) of three or more layers sandwiched between two. In that case, it is preferable that the above relationship is satisfied in all the aluminum plates in contact with the steel plate.
  • the current value, energization time, and applied pressure during welding need not be constant, and the current value and applied pressure may be changed in two or more stages.
  • the present invention can be applied regardless of the presence or absence of surface plating and thickness, the composition and thickness of the oxide film, the strength of the base material, and the thickness of the steel plate and aluminum plate.
  • test materials mild steel was used for the steel plate, and a 5000 series aluminum alloy plate was used for the aluminum plate.
  • the welding machine an inverter DC resistance spot welding machine was used. The welding time was 40 msec, the applied pressure was 2.5 kN, and the electrode shape and current value were changed for welding.
  • the joint After welding, the joint is cut at the center of the welded portion to observe the cross section.
  • the diameter x1 of the aluminum plate after welding is 20% or less of the plate thickness t0 before welding, and the steel plate / aluminum plate after welding.
  • the joint diameter x2 was determined.
  • the peel diameter (mm) was calculated
  • the thickness t2 of the aluminum plate at the fractured part is measured and divided by the base metal plate thickness (plate thickness before welding) t0. The thickness reduction ratio (%) of the part was obtained.
  • the plate thickness t0 before welding of the aluminum plate is defined as the reference plate thickness t (mm)
  • the peel diameter is 4 ⁇ t or more
  • the thickness reduction rate of the fracture portion is 30% or more
  • the current value is 20 kA or less.
  • ⁇ , peel diameter 3.5 ⁇ t or more and thickness reduction of fractured portion When the rate is 30% or more and the current value is higher than 20 kA, the peel diameter is 3.5 ⁇ t or more and the thickness reduction rate of the fracture portion is less than 30%, or the peel diameter is less than 3.5 ⁇ t Was marked with x. Table 1 shows the results.
  • the evaluation was ⁇ to ⁇ in all cases.

Abstract

　La présente invention concerne un procédé de soudage par points du type à résistance qui, quand un ensemble de feuilles stratifiées constitué d'une feuille d'acier et d'une feuille d'aluminium est soumis à un soudage par points du type à résistance, permet de maintenir des caractéristiques de joint entre la feuille d'acier et la feuille d'aluminium dans les limites d'une gamme d'intensité de courant qui peut être émis en sortie par un transformateur de soudage généralement utilisé sur une chaîne de montage de véhicules automobiles, les caractéristiques de joint étant assurées au moyen de la même étape de production que celle utilisée pour assembler deux pièces de feuille d'acier ensemble. Lors de l'exécution d'un soudage par points du type à résistance sur l'ensemble de feuilles, au cours duquel une ou plusieurs feuilles d'acier et une ou plusieurs feuilles d'aluminium sont directement stratifiées, au cours duquel l'une des feuilles se trouvant sur le côté le plus à l'extérieur est une feuille d'acier, et l'autre est une feuille d'aluminium, la relation entre le diamètre de la pointe DFe d'une électrode en contact avec la feuille d'acier et le diamètre de la pointe DA1 d'une électrode en contact avec la feuille d'aluminium est telle que DFe>DA1.
PCT/JP2015/001001 2014-03-05 2015-02-26 Procédé de soudage par points du type à résistance WO2015133099A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015528472A JP6360056B2 (ja) 2014-03-05 2015-02-26 抵抗スポット溶接方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014042446 2014-03-05
JP2014-042446 2014-03-05

Publications (1)

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WO2015133099A1 true WO2015133099A1 (fr) 2015-09-11

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105935834A (zh) * 2016-06-29 2016-09-14 埃夫特智能装备股份有限公司 一种解决金属材料采用电阻点焊后表面出现凹陷的方法
JP2017060994A (ja) * 2015-09-25 2017-03-30 Ｊｆｅスチール株式会社 抵抗スポット溶接継手、抵抗スポット溶接方法および抵抗スポット溶接継手の製造方法
JP2017060995A (ja) * 2015-09-25 2017-03-30 Ｊｆｅスチール株式会社 抵抗スポット溶接継手、抵抗スポット溶接方法および抵抗スポット溶接継手の製造方法
JP2019523711A (ja) * 2016-06-09 2019-08-29 オウトクンプ オサケイティオ ユルキネンＯｕｔｏｋｕｍｐｕ Ｏｙｊ 抵抗スポット溶接電極および電極の使用
CN111195763A (zh) * 2018-11-19 2020-05-26 中车唐山机车车辆有限公司 一种车辆用铝合金与不锈钢的焊接方法及列车车辆
JP7363240B2 (ja) 2019-09-12 2023-10-18 マツダ株式会社 抵抗溶接装置及び抵抗溶接方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006224148A (ja) * 2005-02-17 2006-08-31 Kobe Steel Ltd 異材の抵抗スポット溶接方法
JP2008200687A (ja) * 2007-02-16 2008-09-04 Kobe Steel Ltd 鋼材とアルミニウム材との異材接合方法
US20090050608A1 (en) * 2004-10-26 2009-02-26 Noboru Hayashi Method for joining iron member and aluminum member

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090050608A1 (en) * 2004-10-26 2009-02-26 Noboru Hayashi Method for joining iron member and aluminum member
JP2006224148A (ja) * 2005-02-17 2006-08-31 Kobe Steel Ltd 異材の抵抗スポット溶接方法
JP2008200687A (ja) * 2007-02-16 2008-09-04 Kobe Steel Ltd 鋼材とアルミニウム材との異材接合方法

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017060994A (ja) * 2015-09-25 2017-03-30 Ｊｆｅスチール株式会社 抵抗スポット溶接継手、抵抗スポット溶接方法および抵抗スポット溶接継手の製造方法
JP2017060995A (ja) * 2015-09-25 2017-03-30 Ｊｆｅスチール株式会社 抵抗スポット溶接継手、抵抗スポット溶接方法および抵抗スポット溶接継手の製造方法
JP2019523711A (ja) * 2016-06-09 2019-08-29 オウトクンプ オサケイティオ ユルキネンＯｕｔｏｋｕｍｐｕ Ｏｙｊ 抵抗スポット溶接電極および電極の使用
CN105935834A (zh) * 2016-06-29 2016-09-14 埃夫特智能装备股份有限公司 一种解决金属材料采用电阻点焊后表面出现凹陷的方法
CN111195763A (zh) * 2018-11-19 2020-05-26 中车唐山机车车辆有限公司 一种车辆用铝合金与不锈钢的焊接方法及列车车辆
JP7363240B2 (ja) 2019-09-12 2023-10-18 マツダ株式会社 抵抗溶接装置及び抵抗溶接方法

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JPWO2015133099A1 (ja) 2017-04-06

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