WO2018088367A1 - Structure assemblée et son procédé de fabrication - Google Patents

Structure assemblée et son procédé de fabrication Download PDF

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Publication number
WO2018088367A1
WO2018088367A1 PCT/JP2017/039965 JP2017039965W WO2018088367A1 WO 2018088367 A1 WO2018088367 A1 WO 2018088367A1 JP 2017039965 W JP2017039965 W JP 2017039965W WO 2018088367 A1 WO2018088367 A1 WO 2018088367A1
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Prior art keywords
plate
thin plate
plate material
thickness
insertion member
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PCT/JP2017/039965
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English (en)
Japanese (ja)
Inventor
恭兵 前田
岩瀬　哲
拓朗 青木
Original Assignee
株式会社神戸製鋼所
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Application filed by 株式会社神戸製鋼所 filed Critical 株式会社神戸製鋼所
Priority to CN201780070125.3A priority Critical patent/CN109982804A/zh
Publication of WO2018088367A1 publication Critical patent/WO2018088367A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • 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
    • B23K11/18—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded of non-ferrous metals

Definitions

  • the present invention relates to a bonded structure and a manufacturing method thereof.
  • the pressure on the thin plate side electrode is made smaller than that on the thick plate side electrode, and the contact resistance between the electrode and the plate is smaller on the thin plate side than on the thick plate side.
  • a welding method for controlling so as to be large Patent Document 1.
  • spot welding is made of two stages, the first stage welding is performed, and then the second stage welding is performed at a higher pressure and lower current than the first stage welding.
  • spot welding is a multi-stage energization with constant pressure, and a melt nugget is formed at the thin plate-thick plate interface by the first step current, and the thick plate-thick plate interface is formed by the pulsation current after the second step.
  • a welding method for growing a molten nugget is known (Patent Document 3).
  • the present invention is capable of forming the molten nugget in the thickness direction without adding a special function to the welding apparatus, and without performing special pressurization and energization control even for a plate set having a large thickness ratio.
  • An object of the present invention is to provide a high-quality bonded structure capable of obtaining a sufficient melt nugget diameter and penetration rate by optimizing the position and a method for manufacturing the same.
  • the present invention has the following configuration.
  • a thin plate material that is thinner than the plate material and has an insertion member attached thereto is placed on at least one outer surface of the plate set in which a plurality of plate materials are superimposed, and the thin plate material and the plate set are Welded joint structure,
  • the plurality of plate members of the plate set, the thin plate member, and the insertion member are made of aluminum or aluminum alloy,
  • the ratio of the total plate thickness of the plate set and the thin plate material to the plate thickness of the thin plate material is 4 or more
  • the insertion member has a shaft portion fitted into the thin plate material toward the plate assembly, and a head portion protruding from an outer plate surface opposite to the plate assembly side of the thin plate material, In the range from the tip of the shaft portion of the insertion member to the plate thickness of the plate material arranged on the opposite side of the one outer surface of the plate assembly, a melt nugget is formed,
  • a thin plate material having a thickness thinner than that of the plate material and having an insertion member attached thereto is placed on at least one outer surface of the plate set in which a plurality of plate materials are superimposed, and the thin plate material and the plate set are Welded joint structure,
  • the plurality of plate members of the plate set, the thin plate member, and the insertion member are made of aluminum or aluminum alloy,
  • the insertion member has a shaft portion fitted into the thin plate material toward the plate assembly, and a head portion protruding from an outer plate surface opposite to the plate assembly side of the thin plate material,
  • the total plate thickness of the plate assembly with respect to the member protruding length obtained by adding the outer protruding length from the outer plate surface of the thin plate material to the top surface of the head of the insertion member and the plate thickness of the thin plate material;
  • the ratio of the total length of all the outer protrusion lengths is 4 or less, In the range from the tip of the shaft portion of the insertion member within the thickness of the thin plate material to the
  • a joining structure wherein a ratio of a thickness of the molten nugget existing in a thickness of the thin plate material to a thickness of the thin plate material is 10% or more.
  • a thin plate material that is thinner than the plate material and to which an insertion member is attached is placed on at least one outer surface of the plate set in which a plurality of plate materials are overlaid, and the thin plate material and the plate assembly
  • a method of manufacturing a joined structure for welding The plurality of plate members of the plate set, the thin plate member, and the insertion member are made of aluminum or aluminum alloy, The ratio of the total plate thickness of the plate set and the thin plate material to the plate thickness of the thin plate material is 4 or more; Inserting the shaft portion of the insertion member having a head portion and a shaft portion into the thin plate material, and projecting the head portion from an outer plate surface opposite to the plate assembly side of the thin plate material; The insertion member and the plate assembly are sandwiched between a pair of electrodes, and a welding current is passed between the electrodes,
  • a method of manufacturing a joined structure for welding The plurality of plate members of the plate set, the thin plate member, and the insertion member are made of aluminum or aluminum alloy, Inserting the shaft portion of the insertion member having a head portion and a shaft portion into the thin plate material, and projecting the head portion from an outer plate surface opposite to the plate assembly side of the thin plate material;
  • the total plate thickness of the plate assembly with respect to the member protruding length obtained by adding the outer protruding length from the outer plate surface of the thin plate material to the top surface of the head of the insertion member and the plate thickness of the thin plate material;
  • the ratio of the total length of all the outer protrusion lengths is 4 or less;
  • the position of forming the melt nugget in the plate thickness direction without adding a special function to the welding apparatus or performing special pressurization and energization control even in a plate assembly having a large plate thickness ratio. can be optimized to obtain a sufficient melt nugget diameter and penetration rate. Thereby, a high-quality joining structure can be obtained.
  • FIG. 1 shows a first configuration example of the bonded structure.
  • the joined structure 100 is attached to a plate set 15 in which a plurality (two in the illustrated example) of plate materials 11 and 13 are superposed, a thin plate material 17 that is thinner than each of the plate materials 11 and 13, and the thin plate material 17.
  • the insertion member 21 is provided.
  • the thin plate material 17 is disposed so as to overlap one outer surface 15 a of the plate set 15.
  • an assembly 19 composed of the plate materials 11 and 13 and the thin plate material 17 is configured.
  • the plate members 11 and 13 are referred to as thick plate members.
  • the thick plate members 11 and 13, the thin plate member 17, and the insertion member 21 are made of aluminum or an aluminum alloy, for example, 1000 series, 2000 series, 3000 series, 4000 series, 5000 series, 6000 series, 7000 series, or these. It may be a clad material combining the above.
  • a rivet 21 having a head portion 21a at one end and a shaft portion 21b at the other end is attached to the thin plate member 17 of this configuration as an insertion member.
  • the rivet 21 has a head portion 21 a protruding from the outer plate surface 17 c opposite to the plate assembly 15, and a shaft portion 21 b fitted into the plate assembly 15 in the plate thickness direction of the thin plate material 17.
  • the rivet 21 is made of steel.
  • the assembly 19 has a ratio Rt of Each plate material is selected to be 4 or more.
  • Rt (ta + tb + tc) / ta (1)
  • the ratio Rt is referred to as a plate thickness ratio Rt.
  • the upper limit value of the plate thickness ratio Rt is not particularly limited, but is about 15 in terms of the actual size of the structure.
  • the plate thicknesses of the thick plate members 11 and 13 and the thin plate member 17 are arbitrarily selected from the range of 0.5 to 3.0 mm. Further, the plate thickness ratio Rt is a value obtained on the basis of the plate thickness before pressurization by the electrode for resistance spot welding or the thickness of a portion other than the pressurizing portion.
  • a melted nugget 23 is formed by resistance spot welding, and the assembly 19 and the shaft portion 21 b of the rivet 21 are joined by the melted nugget 23.
  • the molten nugget 23 has a thickness tc of the thick plate 13 disposed on the other outer surface of the plate assembly 15 from the shaft portion 21b (non-melted portion at the tip of the shaft portion) of the rivet 21 within the plate thickness ta of the thin plate material 17. It is formed in the range leading to the inside.
  • the molten nugget 23 has a penetration rate Rm defined by the following equation (2), that is, a penetration that is a ratio of the thickness tn of the molten nugget 23 existing in the thin plate material 17 to the plate thickness ta of the thin plate material 17.
  • the rate Rm is set to 10% or more. In normal spot welding, it is difficult to increase the penetration rate to 10% or more even if the welding conditions are changed. However, if the plate thickness ratio Rt is set, the welding conditions (the penetration rate is 10% or more) Pressure, current value, energization time). That is, by setting the plate thickness ratio Rt as described above, it is possible to form a molten nugget having a penetration rate of 10% or more.
  • Rm tn / ta (2)
  • the penetration rate Rm is 10% or more as described above, but preferably 20% or more. In the following explanation, the penetration rate is preferably 20% or more.
  • the diameter of the molten nugget 23 is larger than the shaft diameter of the rivet 21. Therefore, the thin plate material 17 and the insertion member are integrated by the molten nugget 23, and high welding strength is obtained. In addition, the diameter of the fusion
  • ⁇ Riveting caulking of rivets> 2A and 2B illustrate a method for attaching a rivet to a thin plate material. The rivets in the respective configuration examples described above are fixed to the thin plate material 17 easily and in a short time by driving into the thin plate material 17.
  • the rivet 21 is placed on the thin plate material 17 in a state where the thin plate material 17 is supported on a cylindrical die 41 which is a lower mold. Then, the rivet 21 is driven into the thin plate material 17 by the punch 43 that is the upper die. Then, as shown in FIG. 2B, the thin plate material 17 is punched out by the shaft portion 21 b of the rivet 21, and the scraper 45 falls into the die 41. At this time, the material around the punched hole of the thin plate material 17 is sandwiched between the head 21 a of the rivet 21 and the die 41 and plastically flows into an annular groove 21 c formed in the head 21 a of the rivet 21. . As a result, the material around the punched hole of the thin plate material 17 enters the annular groove 21c and adheres closely to the periphery of the shaft portion 21b. By this driving, the rivet 21 is caulked and fixed to the thin plate material 17.
  • the rivet 21 is caulked and fixed to the thin plate material 17, so that the bonding strength of each member can be stably secured even when the diameter of the formed melt nugget 23 is small.
  • the rivet 21 may be attached by forming a through hole 17a in the thin plate material 17 in the thickness direction and fitting a shaft portion 21b into the through hole 17a.
  • the caulking is not limited to the configuration in which the head 21 a of the rivet 21 is caulked to the thin plate material 17, but may be the configuration in which the shaft portion 21 b of the rivet 21 is caulked to the thin plate material 17.
  • FIG. 3 shows a welding process of the joint structure 100 shown in FIG.
  • the thin plate material 17 to which the rivets 21 are attached is superposed on the plate assembly 15 composed of the thick plate materials 11 and 13, and the assembly 19 obtained thereby is sandwiched between the pair of electrodes 25 and 27.
  • the molten nugget 23 is formed in a region extending from the shaft portion 21 b of the rivet 21 to the thickness of the thick plate material 13.
  • a gap may be generated between the plate surfaces due to warpage of each plate member. If this gap is 3 mm or less, preferably 1 mm or less, it will not affect the welding process.
  • the resistance spot welding electrodes 25 and 27 are provided with cooling pipes (not shown) for flowing a cooling medium, and the electrodes 25 and 27 are forcibly cooled. Therefore, at a position close to the contact portion with the electrodes 25 and 27, the heating temperature does not increase, and the melted nugget 23 tends not to be formed.
  • the electrode 25 is disposed away from the thin plate material 17 by bringing one electrode 25 into contact with the head 21a of the rivet 21. Therefore, the region cooled by the electrode 25 is separated from the thin plate material 17, and the cooling effect of the electrode 25 is less likely to be heated between the thin plate material 17 and the tip of the shaft portion 21 b of the rivet 21. Therefore, the molten nugget 23 is stably formed in the region including the thickness of the thin plate material 17. Thereby, the formation position of the melted nugget 23 in the plate thickness direction of the assembly 19 is optimized, and the melted nugget 23 is also formed in the plate thickness ta of the thin plate material 17.
  • the melted nugget 23 is formed in a range from the plate thickness ta of the thin plate member 17 to the plate thickness tc of the thick plate member 13 disposed on the other outer surface of the plate assembly 15. Therefore, the thin plate material 17 is reliably welded to the thick plate material 11 on the plate assembly 15 side, and the thick plate materials 11 and 13 are also reliably welded.
  • the rivet 21 and the assembly 19 are sandwiched between the pair of electrodes 25 and 27 and welded, so that the melted nugget 23 existing in the thin plate member 17 with respect to the plate thickness ta of the thin plate member 17 is melted.
  • the entrainment rate Rm is 10% or more. When the penetration rate Rm is 10% or more, the welding strength between the thin plate member 17 and the thick plate member 11 can be sufficiently secured, and the high strength assembly 19 can be welded as a whole.
  • the alloy composition and microstructure of the rivet by appropriately selecting the alloy composition and microstructure of the rivet, it can be expected to obtain an accompanying effect.
  • the welded portion may be softened during spot welding, and the joint strength may be less than that of the base metal. Therefore, by using a non-heat treatment type aluminum alloy as the rivet, softening of the welded portion is suppressed, and the strength reduction is suppressed even in the case of the heat treatment type aluminum alloy.
  • the plate surfaces of the thick plate materials 11 and 13 and the thin plate material 17 may be subjected to surface treatment such as plating, chemical conversion treatment, and resin thin film formation. By applying these surface treatments to each plate surface, the rust prevention effect and the like can be improved.
  • the thickness of the surface-treated layer may be a practical level that does not affect spot weldability.
  • FIG. 4 shows a second configuration example of the bonded structure.
  • the bonded structure 200 of this configuration is arranged on a plate set 31 formed by superposing three thick plate members 11, 13, and 29 in the plate thickness direction, and one outer surface 31a of the plate set 31, and the thin plate member 17 is attached to the plate set 31.
  • the stacked assembly 33 and the insertion member 21 are provided.
  • Other configurations are the same as those of the first configuration example described above.
  • the same or common components as in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted as appropriate.
  • each plate material is selected so that the plate thickness ratio Rt is 4 or more.
  • the upper limit of the plate thickness ratio Rt is about 15.
  • the molten nugget 35 of this configuration is formed in a range from the shaft portion 21b of the rivet 21 within the plate thickness ta of the thin plate member 17 to the plate thickness td of the thick plate member 29 disposed on the other outer surface of the plate set 31. Is done. Further, the penetration rate Rm of the molten nugget 35 with respect to the plate thickness ta of the thin plate member 17 is 10% or more.
  • the molten nugget 35 is also formed in the plate thickness ta of the thin plate member 17 by sandwiching and welding the rivet 21 and the assembly 33 between the pair of electrodes. As a result, the formation position of the molten nugget 35 in the plate thickness direction of the assembly 33 is optimized, and high welding strength is obtained.
  • FIG. 5 shows a third configuration example of the bonded structure.
  • the bonded structure 300 of this configuration includes a plate set 15 formed by superposing two thick plate members 11 and 13 and thin plate members 17 and 51 that are thinner than the thick plate members 11 and 13.
  • the thin plate material 17 is overlaid on the outer surface of the thick plate material 11 that is one outer surface 15a of the plate assembly 15, and the thin plate material 51 is overlaid on the outer surface of the thick plate material 13 that is the other outer surface 15b of the plate assembly 15. Is done.
  • the assembly 53 which consists of the thick plate materials 11 and 13 and the thin plate materials 17 and 51 is comprised.
  • the rivets 21 and 55 are arranged coaxially with the pair of thin plate members 17 and 51, respectively.
  • the shaft portions 21b and 55b are driven into the thin plate members 17 and 51, and are inserted into the through holes 17a and 51a formed by the driving.
  • Other configurations are the same as those of the first configuration example.
  • the thin plate materials 17 and 51 have the same plate thickness ta, and the plate thickness ratio Rt is defined by the equation (4).
  • Rt (2ta + tb + tc) / ta (4)
  • each plate material is selected so that the plate thickness ratio Rt is 4 or more.
  • the upper limit of the plate thickness ratio Rt is about 15.
  • the joining structure 300 shown in FIG. 5 is joined by resistance spot welding in the same manner as the joining structure 100 shown in FIG. Due to this resistance spot welding, the melt nugget 57 of this configuration causes the plate thickness tc of the thick plate material 13 disposed on the other outermost side of the plate assembly 31 from the shaft portion 21b of the rivet 21 within the plate thickness ta of the thin plate material 17. And a range extending from the shaft portion 55b of the rivet 55 in the plate thickness ta of the thin plate member 51 to the plate thickness tb of the thick plate member 11 disposed on one outermost side of the plate assembly 15. The That is, the molten nugget 57 is integrally formed in a range from the shaft portion 21 b of one rivet 21 to the shaft portion 55 b of the other rivet 55.
  • the penetration rate Rm of the molten nugget 57 existing in the plate thickness ta of the thin plate member 17 with respect to the plate thickness ta of the thin plate member 17 is 10% or more.
  • the penetration rate Rm of the melted nugget 57 existing in the plate thickness ta of the thin plate material 51 with respect to the plate thickness ta of the thin plate material 51 is 10% or more.
  • the molten nugget 57 is also formed in the plate thickness ta of the thin plate members 17 and 51 by sandwiching and welding the rivets 21 and 55 and the assembly 53 between the pair of electrodes.
  • the formation position of the melted nugget 57 in the plate thickness direction of the assembly 53 is optimized, and the thick plate members 11 and 13 and the thin plate members 17 and 51 are joined to each other with high welding strength.
  • FIG. 6 shows a fourth configuration example of the bonded structure.
  • the joint structure 400 includes a plate set 15 formed by superposing two thick plate members 11 and 13, a thin plate member 17 having a thickness thinner than the thick plate members 11 and 13, and an insertion member 21.
  • the thin plate material 17 is disposed so as to overlap one outer surface 15 a of the plate set 15.
  • an assembly 71 composed of the thick plate materials 11 and 13 and the thin plate material 17 is configured.
  • the above-described joint structure 400 has the same configuration as the joint structure 100 shown in FIG. 1, but the method for selecting each plate material of the assembly 71 is different.
  • the total length of the outer protruding length Lp from the outer plate surface 17c of the thin plate member 17 to the top surface of the head 21a of the rivet 21 and the plate thickness ta of the thin plate member 17 is defined as a member protruding length La. .
  • the ratio of the total length of the entire assembly 19 (ta + tb + tc) and the outer protruding length Lp to the member protruding length La is Rp
  • Each plate material is selected for the assembly 19 so that the ratio Rp is in the range of 4 or less.
  • Rp (ta + tb + tc + Lp) / La (5)
  • the ratio Rp is referred to as a protrusion thickness ratio Rp.
  • the plate thicknesses of the thick plate members 11 and 13 and the thin plate member 17 are arbitrarily selected from the range of 0.5 to 3.0 mm.
  • the protrusion thickness ratio Rp is a value obtained on the basis of the plate thickness before pressurization by the electrode for resistance spot welding or the thickness of a portion other than the pressurizing portion.
  • a minimum of protrusion thickness ratio Rp Preferably it is 1.5, More preferably, it is 2.0.
  • the molten nugget 23 is formed on the bonded structure 400 of this configuration by resistance spot welding, and the assembly 19 and the shaft portion 21b of the rivet 21 are bonded by the molten nugget 23.
  • the molten nugget 23 has a plate thickness tc of the thick plate material 13 disposed on the other outermost side of the plate assembly 15 from the shaft portion 21b (non-melted portion at the tip of the shaft portion) of the rivet 21 within the plate thickness ta of the thin plate material 17. It is formed in the range leading to the inside.
  • the melt nugget 23 has a penetration rate Rm defined by the above-described equation (2) of 10% or more.
  • Rm penetration rate defined by the above-described equation (2) of 10% or more.
  • Other functions and effects are the same as those of the bonded structure 100 of the first configuration example.
  • FIG. 7 shows a fifth configuration example of the bonded structure.
  • the joining structure 500 of this configuration has an assembly 73 in which the thin plate material 17 is superimposed on one outermost side of the plate set 31 formed by superimposing the three thick plate materials 11, 13, and 29 in the thickness direction. .
  • the above-described joint structure 500 has the same configuration as the joint structure 200 shown in FIG. 4, but the method for selecting each plate material of the assembly 73 is different.
  • the total length of the outer protruding length Lp from the outer plate surface 17c of the thin plate material 17 to the top surface of the head 21a of the rivet 21 and the plate thickness ta of the thin plate material 17 is the member protruding length.
  • the protrusion thickness ratio Rp is the ratio of the total length of the assembly 33 (ta + tb + tc + td) and the outer protrusion length Lp to the member protrusion length La, as shown in equation (6).
  • Rp (ta + tb + tc + td + Lp) / La (6)
  • each plate material is selected so that the protrusion thickness ratio Rp is in the range of 4-15.
  • the protrusion thickness ratio Rp Preferably it is 1.5, More preferably, it is 2.0.
  • the joint structure 500 of this configuration is joined by resistance spot welding in the same manner as the joint structure 200 of the second configuration example.
  • the molten nugget 35 of this configuration is formed in a range from the shaft portion 21b of the rivet 21 within the plate thickness ta of the thin plate member 17 to the plate thickness td of the thick plate member 29 disposed on the other outer surface of the plate set 31. Is done. Further, the penetration rate Rm of the molten nugget 35 with respect to the plate thickness ta of the thin plate member 17 is 10% or more.
  • Other functions and effects are the same as those of the bonded structure 200 of the second configuration example.
  • FIG. 8 shows a sixth configuration example of the bonded structure.
  • the joint structure 600 of this configuration includes a plate set 15 formed by superposing two thick plate members 11 and 13, thin plate members 17 and 51 that are thinner than the thick plate members 11 and 13, and an insertion member 21.
  • the thin plate material 17 is overlaid on the outer surface of the thick plate material 11 that is one outer surface 15a of the plate assembly 15, and the thin plate material 51 is overlaid on the outer surface of the thick plate material 13 that is the other outer surface 15b of the plate assembly 15. Is done.
  • the assembly 75 which consists of the thick plate materials 11 and 13 and the thin plate materials 17 and 51 is comprised.
  • the above-described joint structure 600 has the same configuration as the joint structure 300 shown in FIG. 5, but the method for selecting each plate member of the assembly 75 is different.
  • the thin plate materials 17 and 51 have the same plate thickness ta, and the protrusion thickness ratio Rp is expressed by the equation (7).
  • Rp (2ta + tb + tc + 2Lp) / La (7)
  • each plate material is selected so that the protruding thickness ratio Rp is in the range of 4 or less.
  • the protruding thickness ratio Rp is 1.5, More preferably, it is 2.0.
  • the joint structure 600 of this configuration is joined by resistance spot welding in the same manner as the joint structure 300 shown in FIG. Due to this resistance spot welding, the melt nugget 57 of this configuration has a plate thickness td of the thick plate material 29 disposed on the other outermost side of the plate assembly 31 from the shaft portion 21b of the rivet 21 within the plate thickness ta of the thin plate material 17. And a range extending from the shaft portion 55b of the rivet 55 in the plate thickness ta of the thin plate member 51 to the plate thickness tb of the thick plate member 11 disposed on one outermost side of the plate assembly 15. The That is, an integrated molten nugget 57 is formed in a range from the shaft portion 21 b of one rivet 21 to the shaft portion 55 b of the other rivet 55.
  • the penetration rate Rm of the molten nugget 57 existing in the plate thickness ta of the thin plate member 17 with respect to the plate thickness ta of the thin plate member 17 is 10% or more.
  • the penetration rate Rm of the melted nugget 57 existing in the plate thickness ta of the thin plate material 51 with respect to the plate thickness ta of the thin plate material 51 is 10% or more.
  • Other functions and effects are the same as those of the joint structure 300 of the third configuration example.
  • the thin plate members 17 and 51 are described as having the same plate thickness. However, the thin plate members 17 and 51 may be different from each other as long as they are thinner than the thick plate members 11 and 13.
  • FIG. 9 shows a modified example of the bonded structure.
  • a concave portion 17 b is formed on the outer surface of the thin plate material 17.
  • the shaft portion 61b of the rivet 61 is fitted into the recess 17b.
  • the rivet 61 and the assembly 19 are sandwiched between a pair of electrodes and welded so that the molten nugget 23 is formed. It is formed.
  • the outer edge of the formed melt nugget 23 is indicated by a dotted line.
  • the joint structure 700 of the present modification even if the hole for inserting the shaft portion 61b of the rivet 61 is not a through hole, the bottom portion of the concave portion 17b is melted when a welding current is applied, and the molten nugget 23 is formed. Also in this case, the penetration rate Rm of the thickness tn of the molten nugget 23 existing in the thin plate material 17 with respect to the plate thickness ta of the thin plate material 17 of the molten nugget 23 is 10% or more.
  • the rivet head remains after the plate assembly is welded, but after the plate assembly is welded, the rivet head protruding from the outer surface of the thin plate member may be removed. . In that case, it can be set as the joining structure by which the surface of the board assembly was made into the flat surface.
  • the insertion member is not limited to rivets.
  • a projection that protrudes from the surface of the base material may be formed on a part of the base material, and the projection may be fitted into a thin plate material.
  • a plate-like insertion member is stacked on the thin plate material, a die having a concave hole on the lower side of the thin plate material, a punch is arranged on the upper side of the insertion member, and a punch is pressed from the upper side of the insertion member. There may be.
  • a recessed part is simultaneously formed in a thin plate material and an insertion member, respectively, and a thin plate material and an insertion member are fastened because this recessed part closely_contact
  • the portion where the plate-like insertion member is plastically deformed to form a recess is the shaft portion, and the other plate-like portion is the head.
  • the insertion member may be a member that protrudes from the thin plate material to the opposite side to the thick plate material.
  • a conductive dummy plate (insertion member) that satisfies any of the above-described formulas (1), (3), and (4) is disposed on the outer surface of the thin plate during welding, and the dummy plate, A thick plate material and a plate set including a thin plate material may be sandwiched and welded between the electrodes, and the dummy plate may be removed from the plate set after welding.
  • the formation position of the molten nugget in the plate thickness direction of the plate assembly is optimized, and even a thin plate can be reliably welded.
  • the number of thick plate members constituting the plate assembly is not limited to two or three as shown in each configuration example, and may be four or more. Further, the number of sheets may be 5 to 8 or more as long as the condition of the protrusion thickness ratio Rp is satisfied.
  • two or more thin plate members may be arranged on one side of a thick plate member. Even in that case, good joining with the thick plate material can be performed.
  • plate assembly samples 1 and 2 Two types of plate assembly samples (plate assembly samples 1 and 2) composed of three plate materials having different materials and thickness ratios shown in Table 1 below were used as test objects, and welding was performed using the same welding apparatus.
  • the plate thickness ratio is based on the original plate thickness (thickness before pressing, or thickness of a portion not pressed).
  • A5083 was used for the material of the insertion member (rivet).
  • Each plate set sample 1 and 2 was welded under the welding conditions of Examples 1 to 6 and Comparative Examples 1 to 6 shown in Tables 2 and 3 below, and the upper plate (thin plate material) and middle plate after welding A tensile test was performed until the plate was broken by applying a tensile force to the (thick plate material). And in each condition, the penetration rate and the fracture form (plug fracture, interface fracture) of the welded part were confirmed.
  • the penetration rate is 100% (10% or more), and the fracture form of the welded part by the tensile test is “plug fracture”, which is good as an evaluation of the welding strength. Results were obtained.
  • the penetration rate was 0% (less than 10%), and the fracture form of the welded part by the tensile test was “interfacial fracture”, and good results were obtained as an evaluation of the welding strength. There wasn't.
  • a thin plate material that is thinner than the plate material and has an insertion member attached thereto is placed on at least one outer surface of the plate set in which a plurality of plate materials are superimposed, and the thin plate material and the plate set are Welded joint structure,
  • the plurality of plate members of the plate set, the thin plate member, and the insertion member are made of aluminum or aluminum alloy,
  • the ratio of the total plate thickness of the plate set and the thin plate material to the plate thickness of the thin plate material is 4 or more
  • the insertion member has a shaft portion fitted into the thin plate material toward the plate assembly, and a head portion protruding from an outer plate surface opposite to the plate assembly side of the thin plate material, In the range from the tip of the shaft portion of the insertion member to the plate thickness of the plate material arranged on the opposite side of the one outer surface of the plate assembly, a melt nugget is formed,
  • a thin plate material having a thickness thinner than that of the plate material and having an insertion member attached thereto is placed on at least one outer surface of the plate set in which a plurality of plate materials are superimposed, and the thin plate material and the plate set are Welded joint structure,
  • the plurality of plate members of the plate set, the thin plate member, and the insertion member are made of aluminum or aluminum alloy,
  • the insertion member has a shaft portion fitted into the thin plate material toward the plate assembly, and a head portion protruding from an outer plate surface opposite to the plate assembly side of the thin plate material,
  • the total plate thickness of the plate assembly with respect to the member protruding length obtained by adding the outer protruding length from the outer plate surface of the thin plate material to the top surface of the head of the insertion member and the plate thickness of the thin plate material;
  • the ratio of the total length of all the outer protrusion lengths is 4 or less, In the range from the tip of the shaft portion of the insertion member within the thickness of the thin plate material to the
  • a joining structure wherein a ratio of a thickness of the molten nugget existing in a thickness of the thin plate material to a thickness of the thin plate material is 10% or more.
  • the insertion member is a rivet
  • At least one outer surface of a plate assembly in which a plurality of plate members are overlapped, a thin plate member that is thinner than the plate member and to which an insertion member is attached is placed on top of the thin plate member and the plate assembly.
  • a method of manufacturing a joined structure for welding The plurality of plate members of the plate set, the thin plate member, and the insertion member are made of aluminum or aluminum alloy, The ratio of the total plate thickness of the plate set and the thin plate material to the plate thickness of the thin plate material is 4 or more; Inserting the shaft portion of the insertion member having a head portion and a shaft portion into the thin plate material, and projecting the head portion from an outer plate surface opposite to the plate assembly side of the thin plate material; The insertion member and the plate assembly are sandwiched between a pair of electrodes, and a welding current is passed between the electrodes, so that the one outer side surface of the plate assembly is separated from the tip of the shaft portion of the insertion member.
  • At least one outer surface of a plate assembly in which a plurality of plate members are overlapped, a thin plate member that is thinner than the plate member and to which an insertion member is attached is placed on top of the thin plate member and the plate assembly.
  • a method of manufacturing a joined structure for welding The plurality of plate members of the plate set, the thin plate member, and the insertion member are made of aluminum or aluminum alloy, Inserting the shaft portion of the insertion member having a head portion and a shaft portion into the thin plate material, and projecting the head portion from an outer plate surface opposite to the plate assembly side of the thin plate material;
  • the total plate thickness of the plate assembly with respect to the member protruding length obtained by adding the outer protruding length from the outer plate surface of the thin plate material to the top surface of the head of the insertion member and the plate thickness of the thin plate material;
  • the ratio of the total length of all the outer protrusion lengths is 4 or less;
  • the manufacturing method of the joining structure characterized by the above-mentioned.
  • the thickness of the plate assembly can be obtained without adding a special function to the welding apparatus and without performing special pressurization and energization control.
  • the formation position of the molten nugget in the direction is optimized, and the molten nugget is reliably formed in the thin plate material. Thereby, it is possible to easily manufacture a bonded structure with high welding quality.
  • the thin plate member has a through hole
  • the insertion member can be easily attached to the thin plate member by fitting the shaft portion of the insertion member into the through hole.
  • the thin plate member has a recess
  • this bonded structure it is only necessary to form a recess in the thin plate material, and the insertion member can be easily attached to the recess. Thereby, the processing time and cost of a thin plate material can be reduced, and a welding process is not complicated.
  • the plate-like insertion member and the thin plate material are overlapped and punch-pressed to form recesses in both the insertion member and the thin plate material at the same time, and the insertion member and the thin plate material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Resistance Welding (AREA)

Abstract

La présente invention concerne un ensemble de plaques formé par empilement de plusieurs éléments plaque, et un élément plaque mince, qui est plus mince que les éléments plaque et qui comporte un élément d'insertion qui lui est fixé et qui est agencé empilé et soudé sur la surface extérieure dudit ensemble plaques. Les éléments plaque de l'ensemble de plaques, l'élément plaque mince et l'élément d'insertion sont formés à partir d'aluminium ou d'un alliage d'aluminium. Le rapport de l'épaisseur totale de l'ensemble de plaques et de l'élément plaque mince à l'épaisseur de l'élément plaque mince est supérieur ou égal à 4. L'élément d'insertion comprend une partie arbre, et une partie tête qui fait saillie depuis la surface extérieure de l'élément plaque mince. Un noyau fusionné est formé et s'étend à partir de l'extrémité distale de la partie arbre dans les éléments plaque. Le rapport de l'épaisseur du noyau fusionné (23) situé à l'intérieur de l'élément plaque mince à l'épaisseur de l'élément plaque mince est supérieur ou égal à 10 %.
PCT/JP2017/039965 2016-11-14 2017-11-06 Structure assemblée et son procédé de fabrication WO2018088367A1 (fr)

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JP7405717B2 (ja) * 2020-08-28 2023-12-26 株式会社神戸製鋼所 異材接合方法、及び接合体
JP7364543B2 (ja) 2020-09-07 2023-10-18 株式会社神戸製鋼所 異材接合方法及び異材接合体

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