WO2024043286A1 - Élément de structure et procédé de fabrication d'élément de structure - Google Patents

Élément de structure et procédé de fabrication d'élément de structure Download PDF

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Publication number
WO2024043286A1
WO2024043286A1 PCT/JP2023/030390 JP2023030390W WO2024043286A1 WO 2024043286 A1 WO2024043286 A1 WO 2024043286A1 JP 2023030390 W JP2023030390 W JP 2023030390W WO 2024043286 A1 WO2024043286 A1 WO 2024043286A1
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WO
WIPO (PCT)
Prior art keywords
extruded
pressing
structural member
friction stir
base
Prior art date
Application number
PCT/JP2023/030390
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English (en)
Japanese (ja)
Inventor
美速 今村
幸昌 宮田
成一 橋本
克彦 縄田
拓巳 中原
智恵子 今井
Original Assignee
株式会社神戸製鋼所
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Publication date
Application filed by 株式会社神戸製鋼所 filed Critical 株式会社神戸製鋼所
Publication of WO2024043286A1 publication Critical patent/WO2024043286A1/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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance

Definitions

  • the present invention relates to a structural member and a method for manufacturing the structural member.
  • a battery system mounted on such a vehicle or device generally has a configuration in which a large number of batteries (batteries, battery cells) are housed in a battery tray.
  • Patent Document 1 discloses, as a battery pack structure that accommodates a plurality of battery packs, an outer frame body in which a pair of front frames and a rear frame are connected by left and right side frames, respectively, and a bottom side of the outer frame body.
  • a cooling member is disclosed in which the cooling member has an upper cooling layer and a lower cooling layer stacked on top of each other to form a cooling flow path inside.
  • Patent Document 2 discloses a battery storage structure in which a battery storage part is formed inside by a bottom part and a side wall part standing up from the bottom part, and the bottom part has a heat pipe structure.
  • Patent Document 3 discloses a battery case structure for a vehicle in which a first side member and a second side member arranged to face each other form a housing portion for a battery module.
  • first side member and the second side member has a skeleton hollow part located on the side side of the battery module and an under hollow part located on the lower side of the battery module.
  • a clearance hollow part is provided between the housing bottom part of the battery module housing part and the under hollow part.
  • the skeleton hollow part, the clearance hollow part, and the under hollow part are integrally formed.
  • Patent Document 4 discloses a technique for joining members together by friction stir welding the joint portion from the front and back.
  • Japanese Patent Application Publication No. 2021-140863 Japanese Patent Application Publication No. 2020-19291 Japanese Patent Application Publication No. 2021-70386 Japanese Patent No. 4838385
  • an object of the present invention is to provide a structural member manufactured with high precision while ensuring sufficient rigidity, and a method for manufacturing the structural member.
  • the present invention consists of the following configuration.
  • the joint portion of the plurality of extruded panels is a first stirring joint formed on the surface side; a second stirring joint formed on the back side; has The total thickness of the joint portion is 15 mm or less
  • the edge on the joint part side of the extruded panel having the hollow part has a dimension equal to or larger than the sum of half the width of the shoulder stirring surfaces formed on the front and back sides of the joint part and the thickness of the ribs between the hollow parts.
  • FIG. 1 is a perspective view of a structural member according to this configuration example.
  • FIG. 2 is a side view of the structural member according to this configuration example.
  • FIG. 3 is a side view of a portion of the structural member.
  • FIG. 4 is a perspective view of the joint portion of the structural member.
  • FIG. 5 is a side view of the joint portion of the structural member.
  • FIG. 6A is a perspective view of the extrusion panel placed on the base, illustrating the first placement step and the first pressing step.
  • FIG. 6B is a side view of the extrusion panel placed on the base, illustrating the first placement step and the first pressing step.
  • FIG. 7A is a perspective view of the extrusion panel placed on the base, illustrating the first pressing step.
  • FIG. 7B is a side view of the extrusion panel placed on the base, illustrating the first pressing step.
  • FIG. 8 is a side view of the extrusion panel arranged on the base, illustrating a reference example of the pressing method using the pressing jig in the first pressing step.
  • FIG. 9A is a perspective view of the extruded panel placed on the base, illustrating the first bonding step.
  • FIG. 9B is a side view of the extruded panel placed on the base, illustrating the first bonding step.
  • FIG. 10 is a side view of the extrusion panel placed on the base, with the pressing jig and holding jig removed.
  • FIG. 11 is a side view of the extrusion panel placed on the base, illustrating the second placement step, the second pressing step, and the second pressing step.
  • FIG. 12 is a side view of the extruded panel placed on the base, illustrating the second bonding step.
  • FIG. 13 is a side view of an extruded panel placed on a base illustrating machining after joining a plurality of extruded panels.
  • FIG. 14 is a perspective view of a machined structural member.
  • FIG. 1 is a perspective view of a structural member 100 according to this configuration example.
  • FIG. 2 is a side view of the structural member 100 according to this configuration example.
  • the structural member 100 according to this configuration example is a plate-shaped structure, and is composed of a plurality of extruded panels 11 (two in this example).
  • the structural member 100 is configured by joining the side surfaces of the extrusion panel 11 along the extrusion direction to each other.
  • a plate-shaped extruded material made of aluminum or aluminum alloy is used as the extruded panel 11.
  • the aluminum alloy used for the extruded panel 11 is preferably an aluminum alloy such as 5000 series, 6000 series, or 7000 series according to JIS or AA standards, since it has excellent strength and can be made thinner.
  • These hollow extruded aluminum alloy sections are produced by appropriately combining casting (DC casting method or continuous casting method), homogenization heat treatment, hot extrusion, solution treatment and quenching treatment, and if necessary artificial aging treatment.
  • the manufactured product can be suitably used.
  • the structural member 100 can be made lightweight and have a high strength structure.
  • FIG. 3 is a side view of a portion of structural member 100. As shown in FIG. 3, each extruded panel 11 has a plurality of hollow portions 13 formed in the center thereof in the thickness direction. In the extruded panel 11 having the hollow portions 13, ribs 15 are provided between the hollow portions 13.
  • the extruded panel 11 is formed to have a thickness T1 of 15 mm or less, for example.
  • the thickness T2 of the hollow part 13 of the extruded panel 11 is approximately half the thickness T1 of the extruded panel 11, and the thickness T3 of the rib 15 of the extruded panel 11 is half the thickness T2 of the hollow part 13. This is said to be the above. This ensures sufficient strength of the extruded panel 11 having the hollow portion 13.
  • FIG. 4 is a perspective view of the joint portion 31 of the structural member 100.
  • FIG. 5 is a side view of the joint portion 31 of the structural member 100.
  • This joint portion 31 has a first stirring joint portion 33 formed on one surface, which is the front surface, and a second stirring joint portion 35, which is formed on the other surface, which is the back surface.
  • the joint part 31 has a total wall thickness T4 of 15 mm or less (see FIG. 3), and the depth D1 of the first stirring joint part 33 and the depth D2 of the second stirring joint part 35 are each 2 mm or more and 5 mm or less. It has a certain quality. Thereby, sufficient bonding strength in the joint portion 31 is ensured on the front and back sides. Note that the total thickness T4 of the joint portion 31 is approximately the same as the thickness T1 of the extruded panel 11.
  • the edge of the extruded panel 11 is a solid portion 17.
  • This solid portion 17 has a dimension L from the end surface of the edge portion that is half (Wtf/2) of the width Wtf of the shoulder stirring surface 37 formed on the front and back sides of the joint portion 31 and the rib 15 between the hollow portions 13. (L ⁇ Wtf/2+T3), including the thickness T3 (see FIG. 3).
  • the shoulder stirring surface 37 is a stirring surface formed on the surface layer of the joint when the shoulder portion of the friction stirring tool rotates, presses, and slides, and is also called a shoulder mark. It is formed.
  • the extruded panels 11 are bonded to each other with well-balanced and stable bonding strength on the front and back sides at the joint portion 31 having the first agitation bonding portion 33 on the front side and the second agitation bonding portion 35 on the back side. has been done. Therefore, a structural member 100 with sufficient strength in the joint portion 31 and its surroundings can be obtained.
  • FIGS. 6A and 6B are a perspective view and a side view of the extrusion panel arranged on the base, illustrating the first arrangement step and the first pressing step.
  • FIGS. 7A and 7B are a perspective view and a side view of the extrusion panel placed on the base, illustrating the first pressing step.
  • FIGS. 9A and 9B are a perspective view and a side view of the extruded panel placed on the base, illustrating the first joining process.
  • FIG. 10 is a side view showing the extrusion panel 11 on the base 41 with the pressing jig 45 and holding jigs 47 and 49 removed.
  • FIG. 11 is a side view of the extrusion panel placed on the base, illustrating the second placement step, the second pressing step, and the second pressing step.
  • FIG. 12 is a side view of the extruded panel placed on the base, illustrating the second bonding step.
  • two extruded panels 11 to be joined to each other are set on the base 41 (first placement step). Specifically, two extruded panels 11 are arranged side by side on the smooth surface 43 consisting of the upper surface of the base 41, and the edges of these extruded panels 11 are butted together.
  • pressing jigs 45 are attached to edges opposite to the edges of the extruded panels 11 placed on the base 41 that abut each other, and these pressing jigs 45 push the extruded panels 11 close to each other. Push in the direction you want.
  • the pressing jig 45 is formed into a long prismatic shape and has a holding recess 46 on the extrusion panel 11 side.
  • the pressing jig 45 is attached to the base 41 so that the edge of the extrusion panel 11 is fitted into the holding recess 46 .
  • the edge of the extruded panel 11 is held by the pressing jig 45 over the entire length in the longitudinal direction.
  • the extruded panel 11 held by the pressing jig 45 is pressed in the abutting direction by one side wall 46a forming the holding recess 46, and is further pressed against the smooth surface 43 of the base 41 by the other side wall 46b forming the holding recess 46. Being pushed.
  • the extruded panels 11 with their edges abutted against each other are pressed against the smooth surface 43 of the base 41 (first pressing step).
  • first pressing step In order to press the extrusion panel 11 onto the smooth surface 43 of the base 41, a pair of pressing jigs 47 and a pair of pressing jigs 49 are used.
  • the holding jig 47 is formed into a long flat plate shape, and at least the surface that contacts the extrusion panel 11 is a flat portion 47a.
  • This holding jig 47 has a width dimension larger than that of the hollow portion 13 of the extrusion panel 11.
  • This holding jig 47 is arranged at a position corresponding to the central hollow part 13 of each extrusion panel 11 so that both ends thereof hang over the ribs 15 .
  • the holding jig 49 is formed into a long rod shape, and at least the surface that contacts the extrusion panel 11 is a flat portion 49a.
  • This holding jig 49 is arranged at a position that spans the solid portion 17 near the edges of the extruded panels 11 that are abutted against each other.
  • a pair of presser jigs 49 arranged on each extrusion panel 11 are spaced apart from each other with the butt portions of the extrusion panels 11 as boundaries.
  • the pressing jig 45 as well as the holding jigs 47 and 49 apply a load toward the base 41 by a load applying means.
  • FIG. 8 shows a reference example of the pressing method using the holding jigs 47 and 49 in the first pressing step.
  • two flat pressing jigs 47 are arranged above each extrusion panel 11.
  • One presser jig 47 is disposed above the hollow portion 13, and the other presser jig 47 has its widthwise center disposed directly above the rib 15. Both ends of these holding jigs 47 are arranged at positions where they do not touch the ribs 15.
  • the pressing jigs 49 placed near the edges of the extruded panels 11 that are butted against each other are placed on the hollow portion 13 .
  • both ends of the holding jig 47 are placed at positions where they do not overlap the ribs 15 and the holding jig 49 is placed above the hollow part 13, the hollow part 13 in the extrusion panel 11 is There is a risk that the thin-walled portion may be deformed by the load from the holding jigs 47 and 49.
  • the holding jig 47 is arranged so that both ends thereof are placed on the rib 15, and further, the holding jig 49 is placed so that it is placed on the solid part 17. Therefore, even if the extruded panel 11 is pressed toward the base 41 by these holding jigs 47 and 49, the load is received by the ribs 15 and the solid portion 17, so deformation of the extruded panel 11 can be suppressed. .
  • the abutted edges of the extruded panels 11 are friction stir welded from the front side using a friction stir tool Tf (first joining step). Specifically, the friction stirring tool Tf is inserted from above between the holding jigs 49, and the friction stirring tool Tf is moved along the joining line formed by the mutually butted edges (butt parts) of the extrusion panels 11. and the abutted edges (butt portions) are friction stir welded. As a result, the first stirred joint portions 33 are formed at the edges of the extruded panels 11 that are abutted against each other.
  • a joint portion 31 that is joined on one side by the first stirring joint portion 33 is formed at the butted portion.
  • the ends of the joining line are temporarily joined by friction stirring welding with a length of about 50 mm, and then the joining line including the temporary joining part is joined to the entire length. It is preferable to perform friction stir welding over the entire length.
  • the pressing jig 45 and holding jigs 47 and 49 are removed. Then, as shown in FIG. 10, the extruded panels 11 joined to each other are slightly warped at the joint portion 31 due to the stress applied by the friction stir welding. The occurrence of warpage that occurs at the joint portion 31 can be suppressed by pressing the extruded panel 11 against the smooth surface 43 of the base 41 using holding jigs 47 and 49 during friction stir welding, but it is difficult to completely eliminate it. It is. Therefore, the extruded panels 11 that are friction stir welded to each other on one side gradually rise slightly upward from the smooth surface 43 of the base 41 toward the edge opposite to the side where they are joined. As a result, a slight gap G is created between the outer edge of the extruded panel 11 and the smooth surface 43 of the base 41.
  • the two extruded panels 11 joined on the front side are reversed and placed on the smooth surface 43 of the base 41 (second placement step). Then, the extruded panels 11 are pressed in a direction closer to each other by the pressing jig 45 (second pressing step), and the extruded panels 11 are further pressed against the base 41 by the pressing jigs 47 and 49 (second pressing step).
  • the two extruded panels 11 joined to each other are slightly warped at the joint portion 31.
  • the two extruded panels 11 joined to each other are reversed and placed on the smooth surface 43 of the base 41, a slight lifting occurs in the central portion where the joint portion 31 is located, but the pressing jig 47 , 49 to press the extruded panel 11 against the base 41, the slight lifting of the central portion is eliminated.
  • the inverted extrusion panel 11 can be placed on the base 41 in a flattened state.
  • the joint portions 31 joined at the first stir joint portion 33 of the extruded panel 11 are friction stir welded from the back side using a friction stir tool Tf (second joining step).
  • a second stirring joint portion 35 is formed at the joint portion 31 of the extrusion panel 11 .
  • the ends of the joining line are temporarily joined by friction stirring welding to a length of about 50 mm, and then the entire length of the joining line, including the temporary joining part, is friction stir welded. Bonding is preferred.
  • the pressing jig 45 and holding jigs 47 and 49 are removed.
  • a structural member 100 in which two extruded panels 11 are joined at the joint portion 31 is obtained.
  • the warpage caused by friction stir welding is canceled out on the front and back sides, so that there is almost no deformation such as warpage.
  • the extruded panels 11 are pressed in a direction toward each other, and further, the extruded panels 11 are pressed against the base 41, so that warping that occurs at the joining location can be suppressed.
  • by performing friction stir welding from the front and back sides it is possible to offset the warpage that occurs at the joining location. As a result, a high-quality structural member 100 in which the extruded panels 11 are joined to each other with suppressed warpage can be obtained.
  • FIG. 13 is a side view of the extruded panel 11 placed on the base 41, illustrating machining of the extruded panel 11 after joining.
  • FIG. 14 is a perspective view of a structural member 100 that has been machined. As shown in FIG. 13, after forming the second stirring joint portion 35, some of the pressing ribs 47, 49 are removed. For example, in a machine tool such as a machining center, a cutting tool Tc such as a reamer is replaced with the friction stirring tool Tf, and the structural member 100 is machined using this cutting tool Tc. For example, as shown in FIG. 14, a portion of one side of the structural member 100 is removed to form a concave portion 11a.
  • machining can be easily performed by replacing the cutting tool Tc such as a reamer. Moreover, by performing machining on the structural member 100 restrained by the base 41, stress in the structural member 100 is released, so that deformation caused by friction stir welding can be further reduced.
  • the structural member 100 in which two extruded panels 11 are joined together and the manufacturing method thereof are described, but the number of extruded panels 11 to be joined is not limited to two, and may be three or more. good.
  • the present invention is not limited to the embodiments described above, and those skilled in the art can combine the configurations of the embodiments with each other, modify and apply them based on the description of the specification and well-known techniques. It is also contemplated by the present invention to do so, and is within the scope for which protection is sought.
  • the joint portion of the plurality of extruded panels is a first stirring joint formed on the surface side; a second stirring joint formed on the back side; has The total thickness of the joint portion is 15 mm or less,
  • the edge on the joint part side of the extruded panel having the hollow part has a dimension equal to or larger than the sum of half the width of the shoulder stirring surfaces formed on the front and back sides of the joint part and the thickness of the ribs between the hollow parts.
  • a structural member having a solid portion with a length dimension of According to this structural member, a plurality of extruded panels are joined with a well-balanced and stable bonding strength on the front and back sides in a joint having a first stirred joint on the front side and a second stirred joint on the back side. It is possible to provide structural members.
  • the joint part has a total wall thickness of 15 mm or less, and the edge on the joint part side of the extruded panel having a hollow part is the sum of half the width of the shoulder stirring surface and the thickness of the rib between the hollow parts. It has a solid part with a length dimension greater than the length dimension. Therefore, a structural member with sufficient strength at the joint and its surroundings can be obtained.
  • first stirring joint portion and the second stirring joint portion each have a depth of 2 mm or more and 5 mm or less.
  • the depth of the first stirred joint and the second stirred joint is set to 2 mm or more and 5 mm or less, so that sufficient joint strength can be ensured on the front and back sides of the joint.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

Cet élément de structure comprend une partie de jonction dans laquelle les extrémités d'une pluralité de panneaux extrudés constitués d'un matériau extrudé et dont au moins l'un a une partie creuse sont aboutés ensemble et soudés par friction-malaxage. La partie de jonction de la pluralité de panneaux extrudés comprend une première partie soudée par friction-malaxage formée sur le côté de surface supérieure, et une seconde partie soudée par friction-malaxage formée sur le côté de surface arrière. L'épaisseur totale de la partie de jonction est inférieure ou égale à 15 mm. L'extrémité sur le côté de partie de jonction du panneau extrudé ayant la partie creuse comprend une partie solide d'une dimension de longueur supérieure ou égale à une dimension totale de la moitié de la largeur d'une surface agitée d'épaulement formée sur les côtés supérieur et arrière de la partie de jonction et l'épaisseur d'une nervure entre les parties creuses.
PCT/JP2023/030390 2022-08-24 2023-08-23 Élément de structure et procédé de fabrication d'élément de structure WO2024043286A1 (fr)

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JP2022133620 2022-08-24

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09309164A (ja) * 1996-03-19 1997-12-02 Hitachi Ltd パネル構造体、摩擦接合方法、およびパネル
JP2000052065A (ja) * 1998-08-03 2000-02-22 Sumitomo Light Metal Ind Ltd 押出形材接合方法及び押出形材
JP2000052457A (ja) * 1998-08-07 2000-02-22 Sumitomo Light Metal Ind Ltd 接合用パネル構造体及びパネル
JP2014028398A (ja) * 2012-07-03 2014-02-13 Nippon Light Metal Co Ltd 伝熱板の製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09309164A (ja) * 1996-03-19 1997-12-02 Hitachi Ltd パネル構造体、摩擦接合方法、およびパネル
JP2000052065A (ja) * 1998-08-03 2000-02-22 Sumitomo Light Metal Ind Ltd 押出形材接合方法及び押出形材
JP2000052457A (ja) * 1998-08-07 2000-02-22 Sumitomo Light Metal Ind Ltd 接合用パネル構造体及びパネル
JP2014028398A (ja) * 2012-07-03 2014-02-13 Nippon Light Metal Co Ltd 伝熱板の製造方法

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JP2024031998A (ja) 2024-03-07
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