WO2019163949A1 - Procédé de soudage par recouvrement et élément en forme de plaque - Google Patents

Procédé de soudage par recouvrement et élément en forme de plaque Download PDF

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Publication number
WO2019163949A1
WO2019163949A1 PCT/JP2019/006807 JP2019006807W WO2019163949A1 WO 2019163949 A1 WO2019163949 A1 WO 2019163949A1 JP 2019006807 W JP2019006807 W JP 2019006807W WO 2019163949 A1 WO2019163949 A1 WO 2019163949A1
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WO
WIPO (PCT)
Prior art keywords
steel plate
welding
welding method
space
lap welding
Prior art date
Application number
PCT/JP2019/006807
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English (en)
Japanese (ja)
Inventor
裕企雄 佐藤
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2020501062A priority Critical patent/JPWO2019163949A1/ja
Publication of WO2019163949A1 publication Critical patent/WO2019163949A1/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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/32—Bonding taking account of the properties of the material involved
    • B23K26/322—Bonding taking account of the properties of the material involved involving coated metal parts

Definitions

  • the present invention relates to a lap welding method and a plate member.
  • the boiling point of zinc used for the galvanized steel sheet is about 900 ° C.
  • the melting point of the steel sheet as the base material is about 1500 ° C. Accordingly, when welding a galvanized steel sheet to a temperature exceeding the melting point of the steel sheet, the zinc is vaporized and becomes steam. When this steam stays in the welded part, a blow hole is formed, and a part of the molten steel sheet is blown off by pressure to generate spatter, which causes welding failure.
  • This type of phenomenon occurs not only in galvanized steel sheets, but also when welding metal members having a coating layer with a boiling point lower than the melting point of the base material.
  • a gap is provided between the members to be overlapped by using a spacer, a jig, or the like so that the vapor is released from the gap.
  • a protrusion is formed on one galvanized steel sheet and a recess is formed on the other galvanized steel sheet, and the protrusion is engaged with the recess to form a gap between the two galvanized steel sheets.
  • a method for releasing zinc vapor from the gap to the outside is disclosed.
  • Patent Document 1 is a method of forming a protrusion and a depression on a steel plate to provide a gap, it cannot be used for welding a member that is required to be flat.
  • the present invention has been made in view of the above circumstances, and even when a member is required to have at least one flat surface, the member can be prevented from being deformed by steam generated by heat during welding. It aims at providing a quality welding method and a plate-shaped member.
  • a method of superposing and welding a first member and a second member includes at least one of the first member and the second member having a coating layer.
  • the melting points of the first member and the second member are higher than the boiling point of the coating layer, and the flat portion of the first member and the flat portion around the recess formed in the second member are held in close contact with each other. Then, the welding target area of the first member and the second member in the space formed by the recess and the flat portion of the first member is melted.
  • the present invention even if one of the members is required to be flat, welding defects are prevented by letting the vapor of the coating vaporized by welding escape into the space formed by the flat portion and the concave portion. Thus, it is possible to realize high-quality welding that can prevent the member from being deformed by heat during welding.
  • Sectional drawing of each steel plate welded by the welding method which concerns on embodiment of this invention Sectional drawing of the steel plate of the state closely_contact
  • Sectional drawing of the steel plate of the state welded which is one of the processes of the welding method which concerns on embodiment of this invention
  • (A)-(e) is a top view which illustrates the recessed part formed in a steel plate by the welding method which concerns on embodiment of this invention
  • the perspective view of the appearance panel welded by the welding method concerning the example of the present invention The perspective view of the appearance panel welded by the welding method concerning the example of the present invention
  • a member to be welded in an overlapping manner is a steel plate, and both surfaces are substantially covered with galvanizing.
  • This is called a galvanized steel sheet, and the surface of an iron plate base material mainly composed of iron is coated with a coating layer of zinc or an alloy mainly composed of zinc.
  • the first steel plate 1 is formed flat.
  • the second steel plate 2 is formed with a recess 3, and a flat portion 4 is disposed around the recess 3.
  • the cross section of the recess 3 is formed in a curved shape.
  • the method of forming the recess 3 in the second steel plate 2 is suitable for plastic working, for example, press working.
  • the concave portion 3 shown in FIG. 1 is accompanied by the convex portion 3a, only the concave portion 3 may be formed without the convex portion 3a.
  • the 1st steel plate 1 and the 2nd steel plate 2 are each coat
  • the first steel plate 1 is an example of a first member described in the claims
  • the second steel plate 2 is an example of a second member
  • the galvanized layer is an example of a coating layer.
  • the laser is continuously or intermittently welded from the direction of the arrow 7 as shown in FIG. Irradiate the target area 6.
  • the 1st steel plate 1 and the 2nd steel plate 2 become the fusion
  • the first steel plate 1 and the second steel plate 2 is a galvanized steel plate, the vapor generated by evaporating the galvanized layer is generated in the space 5 as indicated by an arrow 9.
  • the gap reference value L shown in FIG. 2 is preferably 0.05 mm or more and 0.25 mm or less. If the gap is less than 0.05 mm, the vapor evaporated by the galvanized layer cannot be sufficiently released from the welded location, which may cause welding failure. If the gap exceeds 0.25 mm This is because there is a possibility of causing separation of the welded portion, and there is a possibility that the welding strength is insufficient.
  • the gap in the welding target area 6 must be strictly managed.
  • the recess 3 is formed by pressing, so that the shape can be made uniform. Thereby, it is possible to easily maintain the gap of the welding target region 6 within the range of the reference value L simply by closely holding the first steel plate 1 and the flat portion 4 of the second steel plate 2.
  • the welding position based on the position where the recess 3 is formed, it is possible to weld a region having a strictly controlled gap.
  • 4 (a) to 4 (e) are examples of the shape of the projection 3a in a plan view (view A shown in FIG. 1).
  • the planar shape of the concave portion 3 formed together with the convex portion 3a is free as long as a welding target region 6 suitable for welding can be formed between the first steel plate 1 and the second steel plate 2. It is.
  • the circle like the convex part 31 the square like the convex part 32, the rectangle like the convex part 33 and the composite shape like the convex part 34, etc. What is necessary is just to select a thing suitable for intensity
  • the space 5 has a volume in which the pressure inside the space 5 does not exceed the reference value due to vapor generated by laser irradiation.
  • the reference value is a pressure at which blowholes and spatter are not generated due to the vapor pressure of the galvanized layer evaporated by welding, and is, for example, 2 atmospheres.
  • the marks 20 to 24 are provided by laser marking, engraving or press working with a mold. Further, it is preferable that the marks 20 to 24 correspond to the shape of each convex portion.
  • the mark 20 on the elliptical convex portion 30 is elliptical
  • the mark 21 on the circular convex portion 31 is circular
  • the mark 22 on the convex portion 32 that is square is a cross
  • a vertically long rectangle The mark 23 on the convex portion 33 can be set to a cross whose length is longer than the horizontal
  • the mark 24 on the convex portion 34 having an X shape can be set to an X shape or the like.
  • the marks 20 to 24 make the center position of the convex portion clear, and the shape of the convex portion can be easily identified, which serves as a mark indicating the position and shape when the laser beam is irradiated on the welding target region 6. Further, if the marks 20 to 24 are photographed with a camera and recognized, automatic welding can be performed.
  • the solid lines represented by the convex portions 30 to 34 represent the end portions of the respective convex portions 30 to 34, and the dotted lines represent the respective concave portions 3 and the first steel plate.
  • 1 represents the position of the region 6 to be welded inside the space 5 formed by 1. The laser irradiates the dotted line part continuously or intermittently.
  • the exterior panels of the elevators used for the elevator doors, platform doors, and car room walls are provided inside the building. For this reason, importance is placed on harmony with the interior of the building, and various exterior appearances are required according to the indoor device.
  • it can be manufactured by various means such as painting a steel plate member or applying a hairline, etching or mirror finish to a stainless steel material.
  • the plate-shaped member described above can be applied to products using the plate-shaped member in addition to the exterior panel of the elevator.
  • Products using plate-like members include self-standing panels such as switchboards and control panels, indoor and outdoor units provided in air conditioning equipment, water heaters, and lighting equipment.
  • spot welding, arc welding, or adhesion using an adhesive is used for joining a member whose appearance is mainly a reinforcing material.
  • the distortion, which is caused by welding is corrected on the member whose appearance is mainly used, and then painted.
  • the member whose appearance is the main component is stainless steel, it may be joined by bonding because of the property that distortion is more easily generated by welding than a steel plate member.
  • many adhesives are flammable, and there is a risk that the joint may be peeled off in the event of a fire. Therefore, it is necessary to assist the joint by caulking or rivets.
  • laser welding makes it possible to obtain a narrow bead and a deep penetration shape due to the steep energy density distribution that is a characteristic of the laser. For this reason, even a thin steel plate can perform high-speed and precise heat input control regardless of a material such as a steel plate member or a stainless steel material. Therefore, there is little heat influence with respect to a to-be-welded member, and an external appearance surface can be welded with low distortion.
  • laser welding equipment is easy to automate and can be more efficiently welded. Therefore, laser welding is employed.
  • the laser welding apparatus includes an optical system including a laser oscillator, various mirrors, a condenser lens, etc., a welding head apparatus that moves the laser welding head to a desired position, and the shape, welding position, and state of a member to be welded.
  • the image recognition processing device to be monitored, various sensors such as a temperature sensor and appropriate processing programs and various data are stored, and the laser oscillator and the welding head driving device are controlled based on the recognition result of the image recognition processing device, etc.
  • a control device is provided. These are well known to those skilled in the art or can be appropriately selected from those known.
  • the laser welding apparatus also has a function of measuring the thickness of a member to be welded and irradiating a laser having an output suitable for the thickness in order to further improve the welding quality.
  • the outer panel 16 or 17 has the second steel plate 11 or 13 joined to the first steel plate 15 whose appearance is the main component.
  • the second steel plate 11 or 13 is a reinforcing material hidden behind the first steel plate 15. The arrangement of the reinforcing material is omitted in the longitudinal direction as shown in FIG.
  • the convex part 12 is previously formed by press work in the part joined to the 1st steel plate 15 of the 2nd steel plate 11 or 13.
  • the convex portion 12 has an elliptical shape in plan view, and the side opposite to the first steel plate 15 is the protruding direction.
  • a concave portion is formed on the opposite side of the convex portion 12.
  • a mark 14 representing the center position of the convex portion 12 and the shape of the convex portion is formed at the center of the convex portion 12.
  • the flat part around the concave part formed on the opposite side of the convex part 12 and the flat part of the first steel plate 15 are held in close contact with each other.
  • the laser beam is formed at the end of the space corresponding to the space 5 shown in FIGS.
  • the said edge part is a position where the space
  • the 2nd steel plate 11 or 13 is piled up on the 1st steel plate 15, and the flat part of a mutual joint surface is closely_contact
  • the laser is irradiated continuously or intermittently at a preset speed and locus.
  • the locus of laser irradiation is elliptical, but other shapes such as the convex portions 31 to 34 shown in FIGS. 4A to 4E are used.
  • trajectory according to each shape is programmed.
  • the laser simultaneously melts the second steel plate 11 or 13 and the first steel plate 15, but does not melt the vicinity of the opposite surface, which is the appearance surface of the first steel plate 15, so that the spot diameter, output, focus And adjust the welding head speed.
  • the first steel plate 15 and the second steel plate 11 or 13 at the irradiated location are melted.
  • the molten part is united, naturally cooled, solidified, and fixed by welding.
  • the galvanized layer evaporates to become steam. This steam is discharged and stays in the space formed by the concave portion formed on the opposite side of the convex portion 12 and the first steel plate 15 from the welding location.
  • the vapor of the galvanized layer remains in the molten steel plate member, It has caused welding defects such as formation or spattering by blowing a part of the steel plate member with the pressure of the steam.
  • the galvanized layer at the welded part is partially removed by laser irradiation.
  • aging corrosion of the part can be considered.
  • the space 5 shown in FIGS. 2 and 3 is sealed, and the outside air is shut off. Therefore, aging corrosion is prevented.
  • aging corrosion is prevented by galvanizing the weld bead.
  • the first member is the first steel sheet 1 or 15 having a galvanized layer on both sides as a coating layer
  • the second member is a second steel plate having a galvanized layer on both sides as a coating layer.
  • the 1st member was the 1st steel plates 1 and 15 and the 2nd member was the 2nd steel plates 2, 11, and 13 in the present Example, the 1st member was demonstrated.
  • the second member may be any member that can be welded, and is not limited to iron, and can be applied to various alloys.
  • the composition, structure, strength, ductility, and the like of the steel plate are not limited.
  • the coating layer is a galvanized layer.
  • the coating layer only needs to have a boiling point lower than the melting points of the first member and the second member. It may be a plating layer plated with metal or a resin layer.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

Selon l'invention, une première plaque d'acier plate (1) et des parties plates (4) d'une seconde plaque d'acier (2), dans laquelle a été formée une partie évidée (3), sont maintenues en contact étroit entre elles. La première plaque d'acier (1) et/ou la seconde plaque d'acier (2) présentent une couche de placage de zinc. Les points de fusion de la première plaque d'acier (1) et de la seconde plaque d'acier (2) sont plus élevés que le point d'ébullition de la couche de placage de zinc. Dans un espace (5) formé par la partie évidée (3) et la première plaque d'acier (1), une région associée dans laquelle la première plaque d'acier (1) et la seconde plaque d'acier (2) ne sont pas en contact étroit entre elles, et dans laquelle un espace entre ces dernières est approprié pour le soudage, est soudée par irradiation laser. La vapeur de revêtement vaporisée générée par le soudage s'échappe dans l'espace (5).
PCT/JP2019/006807 2018-02-26 2019-02-22 Procédé de soudage par recouvrement et élément en forme de plaque WO2019163949A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020501062A JPWO2019163949A1 (ja) 2018-02-26 2019-02-22 重ね合わせ溶接方法および板状部材

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-032139 2018-02-26
JP2018032139 2018-02-26

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WO2019163949A1 true WO2019163949A1 (fr) 2019-08-29

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001162387A (ja) * 1999-12-07 2001-06-19 Toyota Motor Corp 重ねレーザ溶接方法
JP2004082214A (ja) * 2002-06-27 2004-03-18 Sumitomo Metal Ind Ltd 接合素材、その製造法、接合品、及びその製造法
JP2009154184A (ja) * 2007-12-26 2009-07-16 Nissan Motor Co Ltd レーザ溶接方法および溶接接合体
JP2013237053A (ja) * 2012-05-11 2013-11-28 Trumpf Kk 亜鉛めっき鋼板の溶接方法
WO2016189855A1 (fr) * 2015-05-28 2016-12-01 パナソニックＩｐマネジメント株式会社 Procédé de soudage au laser

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001162387A (ja) * 1999-12-07 2001-06-19 Toyota Motor Corp 重ねレーザ溶接方法
JP2004082214A (ja) * 2002-06-27 2004-03-18 Sumitomo Metal Ind Ltd 接合素材、その製造法、接合品、及びその製造法
JP2009154184A (ja) * 2007-12-26 2009-07-16 Nissan Motor Co Ltd レーザ溶接方法および溶接接合体
JP2013237053A (ja) * 2012-05-11 2013-11-28 Trumpf Kk 亜鉛めっき鋼板の溶接方法
WO2016189855A1 (fr) * 2015-05-28 2016-12-01 パナソニックＩｐマネジメント株式会社 Procédé de soudage au laser

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