JP4396335B2 - Bonding structure and bonding method of dissimilar metal panels - Google Patents

Description

  The present invention relates to a joining structure and joining method for dissimilar metal panels such as an aluminum plate (including an alloy, hereinafter referred to as an aluminum plate) and a steel plate, and a sealant application nozzle.

  Conventionally, in order to reduce rust due to electrolytic corrosion when dissimilar metal panels such as aluminum plates and steel plates with different electric potentials are joined, a joining method in which dissimilar metal panels are not brought into direct contact with an adhesive has been proposed ( Non-patent document 1).

In Non-Patent Document 1, an adhesive is applied to the joint surfaces and joined with rivets to reduce the contact surface of the dissimilar metal panel.
D & M report (24-25 pages) of the magazine “Nikkei Mechanical (issued in Nikkei BP, June 2003)”

  However, in the conventional example of Non-Patent Document 1 described above, the adhesive interposed between the dissimilar metals protrudes from the joint by applying a high pressure when the pierce rivet is driven, and is covered with a sealing agent that prevents water from entering the joint. This hinders the application work to be applied and deteriorates the work quality, such as unsealing of the sealant. Further, when the amount of the intervening adhesive is reduced, the above-mentioned problems such as protrusion can be solved, but there is a possibility that a gap that is not filled with the adhesive is generated in the joint portion, and rusting due to electrolytic corrosion is induced.

The present invention has been made in view of the above problems, and an object thereof is to provide a joint structure and joint how good the sustainable dissimilar metal panels work quality.

The present invention is a joining structure for dissimilar metal panels that fastens dissimilar metal panels with an adhesive interposed in the joining part, and accommodates an adhesive that protrudes from the joining part at the periphery of at least a part of the joining part. Forming a space, applying a sealant over the surface of the dissimilar metal panel that covers the surface of the adhesive that protrudes into the housing space and forms the housing space, and the housing space is applied to the other metal panel around the joint portion. A groove is formed along the periphery of the joint, and the groove and one end of the metal panel are connected to the joint and to the outside .

Therefore, in the present invention, an accommodation space for accommodating the adhesive that protrudes from the joint portion at the time of fastening is formed on at least a part of the periphery of the joint portion, the surface of the adhesive that protrudes from the accommodation space is covered, and an accommodation space is formed. Since the sealing agent is applied across the surface of the dissimilar metal panel, the adhesive can be protruded and reliably applied to the entire joint portion, and electrolytic corrosion due to insufficient application of the adhesive can be prevented. In addition, the adhesive not protrude from the joint surface is also accommodated within the space, can coating nozzle of the sealant to the coating operation without caught in the adhesive, to prevent that you sealant is not completely coated be able to.
Further, the accommodation space is formed by forming a groove along the periphery of the joint portion in the other metal panel around the joint portion, and connecting the joint portion to the outside by the groove and one metal panel end portion. The volume of the storage space can be made relatively large, and the amount of adhesive applied to the joint between the metal panels is applied on the premise that it protrudes from the end of the joint, so that it does not bother It can be reliably applied, and it is possible to reliably prevent electrolytic corrosion due to insufficient application of the adhesive. In addition, even in the sealing agent application operation, the coating nozzle 8 can be guided by using the edge of the groove constituting the accommodation space without being affected by the adhesive protruding from the coating nozzle, and a high-quality sealing agent application state can be achieved. Obtainable.

Will be described below with reference to bonding structure and bonding how dissimilar metal panels of the present invention to the embodiments.

(First embodiment)
1 to 4 show a first embodiment of a joining structure and joining method of dissimilar metal panels to which the present invention is applied, and FIG. 1 is a process diagram showing a joining method of dissimilar metal panels according to the first embodiment. FIG. 3 is a cross-sectional view showing a second embodiment of the dissimilar metal panel joining structure, and FIG. 4 is a cross-sectional view showing a second embodiment of the dissimilar metal panel joining structure. FIG.

  First, the dissimilar metal panel joining process common to the first to third embodiments will be described. In the joining step of this embodiment, as shown in FIG. 1, an adhesive application step S1 for applying an adhesive 3 to one dissimilar metal panel 1 to be joined, and dissimilar metal panels 1 and 2 to be joined to each other as an adhesive. 3, positioning step S2 for interposing, rivet operation step S3 in which the dissimilar metal panels 1 and 2 that have been positioned are riveted by a self-piercing rivet device, and curing to cure the adhesive 3 of the joint 4 that has been riveted. The process comprises a step S4 and a seal application step S5 for covering the cured adhesive 3 and applying the sealant 5.

  In the adhesive application step S1, the electrolytic corrosion preventing adhesive 3 is applied to the joint surface 4A of one metal panel 1 (for example, aluminum alloy material) which is the lower side of the dissimilar metal panels 1 and 2 to be joined. Application is performed using apparatus 6. In this case, the amount of the adhesive 3 applied is large so that the adhesive 3 spreads evenly over the entire joining surface 4A when the metal panels 1 and 2 to be joined are pressed against each other and the adhesive 3 is crushed. . As the adhesive 3, a paste-like, for example, an epoxy-based thermosetting adhesive having excellent rust prevention properties is used. By positioning the one metal panel 1 in advance with a positioning jig (not shown), the application position of the adhesive 3 can be managed with high accuracy.

  In the positioning step S <b> 2, the other metal panel 2 (for example, a steel plate) to be bonded is overlapped on the one metal panel 1 to which the adhesive 3 is applied while the adhesive 3 is sandwiched and positioned. It is desirable that the other metal panel 2 is also superimposed on one metal panel 1 while maintaining positional accuracy by a positioning jig (not shown). The adhesive 3 is sandwiched between the two metal panels 1 and 2 and extends to the periphery along the joint surface.

  In the rivet operation step S3, the positioned dissimilar metal panels 1 and 2 are joined by the self-piercing rivet 7 by a self-piercing rivet device (not shown). When joining with the rivet 7, in order to pressurize both metal panels 1 and 2 with high load in order to increase joint strength, the metal panels 1 and 2 are in close contact with each other, and an adhesive is applied between the metal panels 1 and 2. 3 is spread over the entire joint surface 4A and thinly extended. Further, a part of the adhesive 3 partially protrudes from the end of the joint 4 by the press contact between the panels 1 and 2 in the rivet joint (see 3A in step S3 in FIG. 1).

  In the curing step S4, the metal panels 1 and 2 rivet-bonded are put into a heating furnace (not shown) and heated for a preset time in the heating furnace. Since the adhesive 3 interposed in the joint 4 of the metal panels 1 and 2 rivet-bonded and the adhesive 3A protruding from the joint 4 are thermosetting adhesives, they are heated and cured while passing through the heating furnace. .

  In the seal application step S <b> 5, the seal agent 5 is applied to the entire circumference of the joint portion 4 joined by the cured adhesive 3 and the rivet 7. The sealing agent 5 is applied so as to cover the surface of the adhesive 3 </ b> A by the sealing agent application nozzle 8 and to cover both the metal panels 1 and 2. By the way, in order to surely apply the sealing agent 5 to be applied so as to cover the surface of the adhesive 3A and to cover the surfaces of both the metal panels 1 and 2, usually, the end of one metal panel 2 is used as a guide. Then, the sealing agent 5 is extruded and applied while moving the application nozzle 8. However, in the portion where the adhesive 3 protrudes from the joint 4, the nozzle 8 runs over the adhesive 3 </ b> A and the end of the metal panel 2 does not function as a guide, so the sealing agent 5 is displaced from the original application position. May be painted. Therefore, in this embodiment, the end structure of the metal panel shown in the first to third examples described below is adopted. The applied sealing agent 5 is cured together with the electrodeposition coating film at the time of the drying and curing process after the electrodeposition process in a coating process (not shown).

  In the first example of the end structure of the metal panel of this embodiment shown in FIG. 2, the end 2A of one metal panel 2 to be joined is folded at a right angle in the direction away from the counterpart metal panel 1 to be joined. It is formed by bending. Then, at the boundary where the end 2A of the metal panel 2 is bent at a right angle, a tensile stress is applied during the bending process and the metal panel 2 is stretched to form a substantially triangular space 10 that gradually separates from the counterpart metal panel 1. Is done.

  When the end 2A is bent at a right angle in this way, both the metal panels 1 and 2 are applied with a high load in order to increase the joining strength when joining with the rivet 7 in the rivet operation step S3. When pressed, the adhesive 3 applied between the metal panels 1 and 2 is spread and thinly spread over the entire joint 4, and a part of the adhesive 3 is partially due to the pressure contact between the panels 1 and 2 by rivet bonding. It protrudes from the end of the joint 4 to the outside. The protruding adhesive 3A reaches the substantially triangular space 10, accumulates in the space 10, and is heat-cured in the curing step S4.

Therefore, in the seal application step S5, as shown in FIG.
By sliding the tip of the metal plate 2 in contact with the bent surface of the metal panel 2, it can be guided in the coating direction. Therefore, even if the adhesive 3 has protruding out from the joint 4, can be applied work Failing the adhesive 3A, it is possible to prevent that you have sealant 5 is not completely coated. Further, since the adhesive 3 can also be reliably applied to the entire joint portion 4, electric corrosion due to insufficient application of the adhesive 3 can be prevented.

  In addition, even when the adhesive nozzle 3A protrudes from the joint 4 on the side opposite to the side on which the illustrated application nozzle 8 abuts, the metal panel 1 is similarly connected to the other metal panel 2. The sealing agent 5 can be applied in the same manner by bending it at a right angle. Since the lower metal panel 1 shown in the figure is formed of a thick plate, the sealing agent 5 is similarly applied by sliding the application nozzle 8 against the end face without bending the end. be able to.

  In the second example of the end structure of the metal panel of this embodiment shown in FIG. 3, the end 2A of one metal panel 2 to be joined is smaller than a right angle in the direction away from the counterpart metal panel 1 to be joined. It is formed by bending. And the larger space 10 of the substantially triangular shape which leaves | separates from the other party metal panel 1 gradually can be similarly formed by the bending of the edge part 2A of the metal panel 2. FIG.

  Even when the end 2A is bent and formed as described above, when the metal panels 1 and 2 are pressed with a high load in the rivet operation step S3 in order to increase the joining strength when joining with the rivet 7, The adhesive 3 applied between the metal panels 1 and 2 is spread and thinly spread over the entire joint 4, and a part of the adhesive 3 is partially joined by pressure welding of the panels 1 and 2 in rivet joining. It protrudes from the end of the part 4 to the outside. The protruding adhesive 3A reaches the substantially triangular space 10, accumulates in the space 10, and is heat-cured in the curing step S4.

Therefore, in the seal application step S5, as shown in FIG.
By sliding the tip of the metal plate 2 in contact with the edge of the bent end 2A of the metal panel 2, it can be guided in the coating direction. When the adhesive 3 protrudes in a large amount, the nozzle 8 is tilted in the direction of the arrow with the edge of the bent metal panel 2 as a fulcrum, so that the application of the sealing agent 5 is performed without impairing the workability. Can do. Therefore, even if the adhesive 3 has protruding out from the joint 4, can be applied work Failing the adhesive 3A, it is possible to prevent that you have sealant 5 is not completely coated. Further, since the adhesive 3 can be reliably applied without worrying about the protrusion, it is possible to prevent electrolytic corrosion due to insufficient application of the adhesive 3.

  In the third example of the end structure of the metal panel of the present embodiment shown in FIG. 4, the end 2A of one metal panel 2 to be joined is formed in a crank shape in a direction away from the counterpart metal panel 1 to be joined. It is formed by bending. A substantially rectangular gap 10 can be formed between the metal panel 2 and the counterpart metal panel 1 by bending the end 2 </ b> A of the metal panel 2 in a crank shape.

  Even when the end 2A is bent and formed in a crank shape as described above, the metal panels 1 and 2 are subjected to a high load in order to increase the bonding strength when the rivet 7 is bonded in the rivet operation step S3. When the pressure is applied, the adhesive 3 applied between the metal panels 1 and 2 is spread and thinly spread over the entire joint 4, and a part of the adhesive 3 is partly formed by the pressure contact between the panels 1 and 2 in the rivet joint. Thus, it protrudes from the end of the joint 4 to the outside. The protruding adhesive 3A reaches the substantially rectangular gap space 10, accumulates in the gap space 10, and is heat-cured in the curing step S4.

Therefore, in the seal application step S5, as shown in FIG.
Can be guided in the application direction by sliding the tip of the metal plate 2 in contact with the end 2A of the metal panel 2 bent into a crank shape. Further, even when the adhesive 3 protrudes in a large amount, since the space volume of the gap space 10 formed by bending is relatively large, the sealant does not further protrude from the gap space 10 and does not impair workability. 5 can be applied. Therefore, that the adhesive 3 may have protruding out from the joint 4, it can be the coating work of the sealant 5 Failing the adhesive 3A, to prevent that you have sealant 5 is not fully applied it can. Further, since the adhesive 3 can be reliably applied without worrying about the protrusion, it is possible to prevent electrolytic corrosion due to insufficient application of the adhesive 3.

  In the present embodiment, the following effects can be achieved.

(A) A joining structure of dissimilar metal panels 1 and 2 in which the dissimilar metal panels 1 and 2 are fastened by interposing the adhesive 3 in the joining part 4, and the joining part is joined to at least a part of the periphery of the joining part 4 at the time of fastening. 4. A storage space 10 for accommodating the adhesive 3 protruding from 4 is formed, and the sealing agent 5 covers the surface of the adhesive 3A protruding from the storage space 10 and straddles the surface of the dissimilar metal panels 1, 2 forming the storage space 10. Was applied. For this reason, the adhesive 3 protrudes and can be reliably applied to the entire joint 4, and electrolytic corrosion due to insufficient application of the adhesive 3 can be prevented. Further, even if the adhesive 3 protrudes from the joint 4, it is in the accommodation space 10, and the application nozzle 8 for the sealing agent 5 can be applied without being caught by the adhesive 3 </ b> A, and the sealing agent 5 is completely removed. it is possible to prevent that it will not be applied.

  (A) The accommodation space 10 is connected to the joint 4 between the metal panels 1 and 2 by bending the end 2A of the one metal panel 2 around the joint 4 in a direction away from the other metal panel 1. Therefore, the housing space 10 can be formed simply by bending the end portion 2A of the one metal panel 2.

(C) The sealant 5 is applied so that the sealant 5 is delivered to a protruding portion along the application direction of any one of the metal panels 2 forming the accommodation space 10, for example, the edge or the end 2 </ b> A of the upper metal panel 2. for application by moving in the coating direction by contacting the nozzle 8, it can perform coating work of sealing agent 5 without impairing workability, and <br/> this the sealant 5 is not fully applied Can be prevented.

(Second Embodiment)
5 and 6 show a second embodiment of a joining structure and joining method for dissimilar metal panels and a sealant application nozzle to which the present invention is applied, and FIG. 5 shows a first example of a joining structure for dissimilar metal panels. Sectional drawing, FIG. 6 is sectional drawing which shows 2nd Example of the joining structure of a dissimilar metal panel. In this embodiment, a protrusion serving as a guide is provided on the seal application nozzle side to ensure the seal application operation. 1 to 4 are denoted by the same reference numerals, and description thereof is omitted or simplified.

  The present embodiment is common in that the dissimilar metal panel is joined by the dissimilar metal panel joining step (see FIG. 1) similar to the first embodiment. In the present embodiment, the seal application step S5 is performed in the manner shown in FIG. 5 (first example) or FIG. 6 (second example). Hereinafter, each seal application process S5 is demonstrated based on drawing.

  In the seal coating step S5 of the first embodiment shown in FIG. 5, a coating nozzle 8 is used which is integrally provided with a protrusion 8A that protrudes laterally from the nozzle 8 at a position retracted from the tip by approximately the plate thickness of the metal panel 2. Then, a sealing agent is applied. The protrusion 8A protruding in the lateral direction can be guided by the application nozzle 8 in the application direction by sliding in contact with the upper surface of the metal panel 2 when the sealant 5 is applied. Therefore, even if the end 2A of the metal panel 2 to be joined is not bent as in the first embodiment and is simply cut as in the illustrated example, the coating nozzle 8 is connected to the metal panel. It can be moved while sliding along the two edges.

  For example, when the amount of the adhesive 3 protruding from the joint 4 is large, the tip of the nozzle 8 is lifted from the application surface of the seal 5 by tilting the application nozzle 8 in the direction of the arrow in the figure, and the adhesive protrudes. The coating nozzle 8 can be moved in the coating direction while avoiding interference with 3A. In this case, by setting the nozzle opening 8B at the tip of the application nozzle 8 to be a nozzle opening 8B that is obliquely cut so as to face the protrusion 8A, interference caught on the protruding adhesive 3A can be further reduced.

  In the seal application process of the second embodiment shown in FIG. 6, the structure shown in the first embodiment in which the end 2 </ b> A of the joint 4 of the metal panel 2 to be joined is bent in a direction to float from the counterpart metal panel 1. The sealing agent 5 is applied by a combination application nozzle 8. The application nozzle 8 used here has a protrusion 8A that protrudes in the lateral direction with respect to the application nozzle 8 shown in FIG. 5 at the tip of the end 2A of the metal panel 2 to be joined. Installed at a position retracted from.

  Accordingly, the protrusion 8A protruding in the lateral direction is brought into contact with the upper portion of the metal panel 2, and the outer periphery of the nozzle 8 at the base of the protrusion 8A is brought into contact with the side portion of the metal panel 2 to be slid. It is possible to guide more stably. Further, the end portion 2 </ b> A of the metal panel 2 floats from the metal panel 1 on the bonding partner side and protrudes to have the gap space 10, and the adhesive 3 </ b> A is accommodated in the gap space 10 and protrudes outside the gap space 10. Although it is difficult, even if there is an adhesive 3A that further protrudes from the gap space 10, the tip of the nozzle 8 is lifted from the application surface of the sealant 5 by tilting the application nozzle 8 in the same manner as in FIG. The coating nozzle 8 can be moved in the coating direction while avoiding interference with the agent 3A. Moreover, by making the nozzle opening 8B at the tip of the application nozzle 8 into the nozzle opening 8B that is obliquely cut so as to face the protrusion 8A, interference caught on the protruding adhesive 3A can be further reduced.

  In the present embodiment, in addition to the effects (a) to (c) in the first embodiment, the following effects can be achieved.

  (D) Sealing over the surface of the dissimilar metal panels 1 and 2 that covers and joins the surface of the adhesive 3A protruding from the joint 4 of the dissimilar metal panels 1 and 2 fastened with the adhesive 3 interposed in the joint 4 A protrusion 8A is integrally provided on the side of the sealant application nozzle 8 for applying the agent 5, and the application nozzle 8 is positioned by contacting the protrusion 8A with the upper part of the end 2A of the dissimilar metal panel 2 joined. Since the application posture can be adjusted, even if the adhesive 3A protrudes, the tip of the nozzle 8 is lifted from the application surface of the sealant 5 by tilting the application nozzle 8 using the protrusion 8A, and the adhesive 3A protrudes. The coating nozzle 8 can be moved in the coating direction while avoiding interference with the above, and a stable and reliable coating operation can be performed.

(Third embodiment)
7 to 9 show a third embodiment of the joining structure and joining method of dissimilar metal panels to which the present invention is applied. FIG. 7 is a sectional view showing a first example of the joining structure of dissimilar metal panels. FIG. 9 is a sectional view showing a second embodiment of the joining structure of dissimilar metal panels, and FIG. 9 is a sectional view showing a third embodiment of the joining structure of dissimilar metal panels. In the present embodiment, a space for accommodating the adhesive protruding from the joint portion is provided at the periphery of the joint portion so as not to sag outside. In addition, the same code | symbol is attached | subjected to the same apparatus as 1st, 2 embodiment, and the description is abbreviate | omitted or simplified.

  The present embodiment is common in that the dissimilar metal panel is joined by the dissimilar metal panel joining step (see FIG. 1) similar to the first embodiment. In this embodiment, the peripheral edge of the joint portion of the metal panel is formed in the shape shown in FIG. 7 (first example) to FIG. 9 (third example), the adhesive protruding in the rivet operation process is accommodated, and the seal Seal application is performed in the application process. Each embodiment will be described below with reference to the drawings.

  In the joining structure of the first embodiment shown in FIG. 7, the lower metal panel 1 is formed with a bead 11 projecting downward on the periphery of the joining portion 4, and the bead 11 forms an upper surface of the metal panel 1. A groove 12 is formed. Further, a bent end portion 2B that covers the upper portion of the groove 12 and is bent downward and enters the groove 12 is formed on the metal panel 2 that is on the upper side. The bent end 2B is formed closer to the outer edge of the opposite bank than the inner edge of the groove 12 on the joint 4 side, and the accommodating space 10 for the adhesive 3A formed by the groove 12 and the bent end 2B. The volume of is secured.

  In the joining structure described above, when the adhesive 3 is sandwiched between the panels 1 and 2 and the metal panels 1 and 2 are pressed into contact with each other in the rivet operation step S3, the adhesive 3A that protrudes from the joining portion 4 becomes the groove 12 and the bent end. It flows into the storage space 10 formed by the portion 2B and is stored in the storage space 10. At this time, since the bent end portion 2B of the upper metal panel 2 enters the groove 12, the protruding adhesive 3A rides on the outside of the groove 12, or wraps around the upper metal panel 2. Can be prevented. Since a certain amount of space is secured in the housing space 10, it is possible to apply a large amount on the premise that the amount of adhesive applied to the surface of the joint 4 </ b> A between the metal panels 1 and 2 protrudes from the end of the joint 4. Since it can be applied reliably without worrying about the protrusion, the electrolytic corrosion due to insufficient application of the adhesive 3 can be prevented.

Further, in the seal coating step S5 after the curing step S4, the groove 12 while the coating nozzle 8 of the sealant 5 is in contact with the outer periphery 13 of the bent end 2B of the upper metal panel 2 as shown in the figure.
It can be reliably guided by sliding in the direction of. For this reason, the sealant 5 delivered from the nozzle 8
Can be fed into the vacant space in the groove 12 from between the bent end 2B and the outer edge of the groove 12, and a constant good seal can always be formed. Therefore, adhesive 3
Without considering the protrusion from the junction 4, can be applied work Failing the adhesive 3A, it is possible to prevent that you have sealant 5 is not completely coated. Note that the guide of the coating nozzle 8 for the sealant 5 is not limited to the outer periphery 13 of the bent end 2B described above, and although not shown, for example, the coating nozzle 8 is brought into contact with the outer edge 14 of the groove 12 to form the groove. Even when sliding in 12 directions, the sealing operation can be performed in the same manner.

  In the joining structure of the second embodiment shown in FIG. 8, the height of the outer peripheral side edge far from the joint part 4 of the groove 12 formed by the bead 11 protruding downward provided in the lower metal panel 1 is set to the inner peripheral side edge. Form higher than the height. The upper metal panel 2 has a planar shape, and its end 2A is positioned so as to cover the groove 12 beyond the substantially central portion of the groove 12 and to face the inner surface of the outer peripheral side edge. The accommodation space 10 formed by the groove 12 and the end 2A of the upper metal panel 2 is connected to the joint 4 between the metal panels 1 and 2 at the inner periphery, and the outer periphery of the groove 12 of the lower metal panel 1 at the outer periphery. It is connected to the outside through a gap between the edge and the end 2 </ b> A of the upper metal panel 2.

  In the joining structure described above, when the adhesive 3 is sandwiched between the panels 1 and 2 and the metal panels 1 and 2 are pressed into contact with each other in the rivet operation step S3, the adhesive 3 that protrudes from the joint 4 becomes the groove 12 and the upper metal. It flows into the accommodating space 10 formed by the end 2 </ b> A of the panel 2 and is accommodated in the accommodating space 10. At this time, since the end portion 2A of the upper metal panel 2 covers the groove 12 beyond the center portion of the groove 12, the protruding adhesive 3A rides on the outside of the groove 12, or the upper metal panel 2 It is possible to prevent sneaking up to the top. Since a certain amount of space is secured in the housing space 10, it is possible to apply a large amount on the premise that the amount of adhesive applied to the joint 4 between the metal panels 1 and 2 protrudes from the end of the joint 4. Since it can be applied reliably without worrying about the protrusion, the electrolytic corrosion due to insufficient application of the adhesive 3 can be prevented.

Further, in the seal application step S5 after the curing step S4, the application nozzle 8 of the sealant 5 is in the direction of the groove 12 while being in contact with the outer edge 14 of the groove 12 of the lower metal panel 1 as shown in the figure. By sliding, you can be surely guided. For this reason, the sealant 5 delivered from the nozzle 8 is allowed to pass through the groove 1.
2 and the end 2A of the upper metal panel 2 can be fed into a vacant space in the groove 12, and a constant good seal can always be formed. Therefore, without considering the protrusion from the junction 4 of the adhesive 3 can be applied work Failing the adhesive 3A, it is possible to prevent that you have sealant 5 is not completely coated.

  In the joining structure of the third embodiment shown in FIG. 9, a bead 11 protruding downward is formed on the peripheral edge of the joining portion 4 on the lower metal panel 1, and this bead 11 is used on the upper surface of the metal panel 1. A groove 12 is formed. Further, the upper metal panel 2 is formed with a bent end portion 2A that covers the upper portion of the groove 12 and is bent upward at the periphery of the joint portion 4 and flattened at the tip end side. The bent end portion 2A is formed close to the outer edge 14 of the groove 12 beyond the center portion of the groove 12, and the volume of the accommodating space 10 of the adhesive 3 formed by the groove 12 and the bent end portion 2A is increased. Secured.

  In the joining structure described above, when the adhesive 3 is sandwiched between the panels 1 and 2 and the metal panels 1 and 2 are pressed into contact with each other in the rivet operation step S3, the adhesive 3A that protrudes from the joining portion 4 becomes the groove 12 and the bent end. It flows into the accommodation space 10 formed by the portion 2A and is accommodated in the accommodation space 10. At this time, since the bent end portion 2A of the upper metal panel 2 covers the groove 12 beyond the central portion, the protruding adhesive 3A rides on the outside of the groove 12, or the upper metal panel 2 Can be prevented. Since a certain amount of space is secured in the housing space 10, it is possible to apply a large amount on the premise that the amount of adhesive applied to the joint 4 between the metal panels 1 and 2 protrudes from the end of the joint 4. Since it can be applied reliably without worrying about the protrusion, the electrolytic corrosion due to insufficient application of the adhesive 3 can be prevented.

Further, in the seal application step S5 after the curing step S4, the application nozzle 8 of the sealant 5 is slid in the direction of the groove 12 while being in contact with the outer periphery of the bent end portion 2A of the upper metal panel 2 as shown in the figure. Can be surely guided. Therefore, the sealant 5 delivered from the nozzle 8 can be fed into the vacant space 10 in the groove 12 from between the bent end 2A and the outer edge 14 of the groove 12, and a constant good seal is always obtained. Can be formed. Therefore, without considering the protrusion from the junction 4 of the adhesive 3 can be applied work Failing to adhesive 3, it is possible to prevent that you have sealant 5 is not completely coated.

  In the present embodiment, in addition to the effects (a) to (c) in the first embodiment, the following effects can be achieved.

  (E) The accommodation space 10 forms a groove 12 along the periphery of the joint 4 in the other metal panel 1 around the joint 4, and the joint 12 is formed by the groove 12 and one metal panel 2 end 2 </ b> A. Since it is formed to be continuous and communicated with the outside, the volume of the accommodation space 10 can be formed relatively large, and the amount of adhesive applied to the joint 4 between the metal panels 1 and 2 protrudes from the end of the joint 4. By applying a large amount on the premise of this, it is possible to reliably apply without worrying about the protrusion, and it is possible to reliably prevent electrolytic corrosion due to insufficient application of the adhesive 3. Further, in the operation of applying the sealant 5, the edge 14 of the groove 12 constituting the housing space 10 and the bent end 2 </ b> A or 2 </ b> B of the upper metal panel 2 are not affected by the adhesive 3 </ b> A protruding from the application nozzle 8. The application nozzle 8 can be guided using the above, and a high-quality sealant application state can be obtained.

  In the above embodiment, the fastening structure using the rivets 7 has been described as the joining structure for dissimilar metal panels. However, although not shown, both metal panels may be fastened by hemming such as winding.

The process drawing of the joining method of the dissimilar metal panel which shows one Embodiment of this invention. Sectional drawing which similarly shows 1st Example of the joining structure of a dissimilar metal panel. Sectional drawing which similarly shows 2nd Example of the joining structure of a dissimilar metal panel. Sectional drawing which similarly shows 3rd Example of the joining structure of a dissimilar metal panel. Sectional drawing of 1st Example of the joining structure of the dissimilar metal panel which shows 2nd Embodiment of this invention. Sectional drawing which similarly shows 2nd Example of the joining structure of a dissimilar metal panel. Sectional drawing of 1st Example of the joining structure of the dissimilar-metal panel which shows 3rd Embodiment of this invention. Sectional drawing which similarly shows 2nd Example of the joining structure of a dissimilar metal panel. Sectional drawing which similarly shows 3rd Example of the joining structure of a dissimilar metal panel.

Explanation of symbols

1, 2 Dissimilar metal panel 3, 3 A Adhesive 4 Joining part 5 Sealing agent 6, 8 Application nozzle 7 Rivet 10 Storage space 11 Bead 12 Groove

Claims (4)

It is a joint structure of dissimilar metal panels that fasten dissimilar metal panels with an adhesive interposed in the joint,
Forming an accommodation space for accommodating an adhesive that protrudes from the joining portion at the periphery of at least a part of the joining portion;
Applying a sealing agent across the surface of the dissimilar metal panel that covers the surface of the adhesive protruding into the housing space and forms the housing space ,
The housing space is formed by forming a groove along the periphery of the joint in the other metal panel around the joint, and connecting to the joint by the groove and one metal panel end. A junction structure of dissimilar metal panels. It is a dissimilar metal panel joining method in which a dissimilar metal panel is fastened with an adhesive interposed in the joint,
Forming a groove on the periphery of the joint surface of at least one of the metal panels so as to form an accommodation space that is continuous with the joint and open to the outside between at least a part of the periphery of the joint;
The dissimilar metal panel is contacted with an adhesive interposed between the joint surfaces,
Next, both metal panels are pressed and joined together, and the adhesive protrudes from the joint during joining.
To be accommodated in the accommodation space,
Heat curing the adhesive;
It covers the surface of the protruding adhesive and straddles the surface of the dissimilar metal panel that forms the accommodation space.
Method for joining dissimilar metal panels you characterized by applying a sealant Te. The sealing agent is moved in the coating direction by bringing a coating nozzle that feeds the sealing agent into contact with a protruding portion along the coating direction of any one of the metal panels forming the accommodation space.
Method for joining dissimilar metal panels according to 請 Motomeko 2 you wherein applying. The coating nozzle has a projection integrally with the side, coating the sealant while adjusting the position and and applied orientation of nozzles applying nozzle is brought into contact with the top of the dissimilar metal panel formed by joining the projection
Method for joining dissimilar metal panels according to claim 3, characterized in that the fabric.

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