JP2007321880A - Dissimilar metal panel joining structure and joining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an adhesive applied beforehand to a rivet joint part, from being pressed out of a panel edge in driving a self-piecing rivet. <P>SOLUTION: The adhesive B1 is continuously applied to a joint part with the self-piercing rivet R between a flange part 1a of a roof panel 1 made of aluminum and a flange part 2a of a body side panel 2 made of steel, with a locus of circular closed loop shape near the edge (e) of the flange part 1a to form beforehand an adhesive layer 10 with a predetermined width dimension with a plurality of adhesive beads B1 of loop shape lined up in spectacle shape and in series. The loop diameter of the adhesive beads B1 is sized to be larger than a pressure region in driving the self-piercing rivet R and not to come in contact with the self-piercing rivet R after driving is completed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a joining structure and joining method for dissimilar metal panels and, for example, a self-piercing rivet while using an adhesive, as represented by joining a steel body side panel and an aluminum roof panel in an automobile body. The present invention relates to a joining structure and joining method in which different types of metal panels are fastened and joined together by mechanical joining means such as the above.

  As a vehicle body structure, for example, as described in Patent Documents 1 and 2, the roof panel is made aluminum for weight reduction, and the roof panel is made of, for example, a self-piercing rivet with respect to a body side panel that is a steel body component. Fastening and joining are performed by the mechanical joining means.

  In such a joining form, since dissimilar metal panels of aluminum and steel are joined to each other, an adhesive such as a thermosetting type one-pack epoxy adhesive is applied to the joint part on the entire joining surface. It is intended to prevent electric corrosion by applying and interposing on the surface.

The adhesive is applied before the roof panel and the body side panel are fastened and joined by a mechanical joining means such as a self-piercing rivet in the vehicle body assembly process. It is heated and cured in a coating oven (the curing condition is, for example, about 170 ° C. × 20 minutes). Furthermore, in the joining form of the aluminum roof panel and the steel body side panel as described above, since the roof panel is on the upper side, after the electrodeposition coating process, the edge of the roof panel is different from the adhesive. After applying the sealing material, a curing process is performed in a sealing oven in a later step.
JP 2000-272541 A JP 2005-119777 A

  In the conventional joining structure as described above, the adhesive protrudes more or less at the time of fastening / joining by the self-piercing rivet, and the protruding adhesive adheres to the driving jig that controls the driving of the self-piercing rivet. In addition, if the protruding adhesive is cured as it is, it becomes an obstacle to the application work of the sealing material to be applied along the edge of the roof panel after electrodeposition coating, and the workability is deteriorated. In addition, if the adhesive sticks out, air is likely to be trapped in the sealing material to be applied later. This air trapping causes the seal bead to expand or rupture when cured in the sealing oven described above. Inviting and reducing the sealing performance is not preferable.

  In order to prevent such secondary problems due to the protruding adhesive, it is effective to frequently wipe off the protruding adhesive. On the other hand, since the adhesive before heat curing tends to cause the so-called stringing phenomenon, the adhesive tends to adhere to the roof panel and the body side panel, which are the outer panels of the vehicle body, and as a result, the wiping work is performed. Therefore, the work itself becomes complicated.

  In addition, since the viscosity of the adhesive before heat curing changes depending on the temperature, when the self-piercing rivet is driven, it affects the behavior of plastic deformation such as the degree of expansion of the portion corresponding to the leg of the self-piercing rivet, The self-piercing rivet itself may lack the reliability of the fastening and joining strength.

  The present invention has been made paying attention to such problems, and by preventing the adhesive from protruding, a wiping operation associated with the protrusion is made unnecessary, and the self-piercing rivet by combining the adhesive is also used. It is an object of the present invention to provide a joining structure and a joining method that avoid the influence on the fastening and joining strength of mechanical joining means such as the above.

  The invention according to claim 1 is characterized in that a viscous adhesive is interposed between the aluminum-based metal panel and the non-aluminum-based metal panel, and the two are superposed, and the overlapping portion thereof is mechanically bonded. It is a joint structure of dissimilar metal panels formed by fastening and joining, and an adhesive is applied to the joint surface of at least one of the metal panels to form a loop-shaped adhesive bead in advance. It is characterized in that it is fastened and joined by a mechanical joining means so as not to come into contact with the adhesive bead at a position corresponding to the central part of the loop-shaped adhesive bead in the overlapped portion.

  The mechanical joining means mentioned here includes various types such as bolts, mechanical clinch, rivets including blind rivets, etc., but non-penetrating in consideration of handling and joining reliability as will be described later. It is desirable to use a self-piercing rivet that is a mold rivet. Further, the loop of the adhesive bead may be circular or polygonal.

  Specifically, as described in claim 2, both of them are overlapped with a viscous adhesive interposed between an aluminum-based metal panel and a non-aluminum-based metal panel, As a joining structure of dissimilar metal panels formed by mechanically fastening and joining a plurality of non-penetrating rivets in the vicinity of the edge of one of the metal panels along the longitudinal direction of the edge. By continuously applying an adhesive with a loop-like trajectory on the joint surface of one of the metal panels, an adhesive layer in which a plurality of loop-like adhesive beads are arranged in a series of glasses is formed in advance. It is characterized in that a rivet is driven and mechanically fastened and joined at a position corresponding to the central part of the loop-shaped adhesive bead in the overlapped part of both metal panels so as not to contact the adhesive bead. To do.

  Here, as described in claim 6, it is assumed that the aluminum-based metal panel is, for example, a roof panel of an automobile body, and the non-aluminum-based metal panel is a steel body side panel of an automobile body. ing. In particular, in the case of a combination of an aluminum roof panel and a steel body side panel, as shown in claim 7, in the overlapping portion of the roof panel and the body side panel with the roof panel on the upper side, It is desirable to improve the sealing performance by forming a fillet-like seal bead separate from the adhesive along the edge of the panel.

  The invention described in claim 8 captures the technique described in claim 2 as a joining method, and a viscous adhesive is interposed between the aluminum-based metal panel and the non-aluminum-based metal panel. While superimposing the two, a plurality of non-penetrating rivets are driven in the vicinity of the edge of one of the overlapped metal panels along the longitudinal direction of the metal panel, and mechanically fastened and joined. As a joining method for dissimilar metal panels, an adhesive is continuously applied with a loop-like trajectory to the joining surface of at least one of the metal panels, and a plurality of loop-like adhesive beads are arranged in a substantially glasses shape and in series. The adhesive application step for forming the adhesive layer arranged in advance and the riveting so as not to contact the adhesive bead at a position corresponding to the central portion of the loop-shaped adhesive bead among the overlapping portions of the metal panels. By implanting a; and a bonding step of mechanically fastening and joining.

  In this case, as described in claim 9, the loop-shaped adhesive bead is positioned outside the pressurizing range of the driving jig that contacts the metal panel or the rivet and is involved in driving the rivet. It is desirable to form as the thing of the magnitude | size which carries out.

  Therefore, in at least the first aspect of the invention, the adhesive bead has a loop shape and is preset so as not to contact the mechanical joining means. However, the spread of the adhesive is small, and it is possible to reliably seal at least the periphery of the so-called mechanical corrosion means with a high risk of electric corrosion without applying the adhesive to the entire bonding surface as in the past. Become.

  In addition, since the adhesive bead is loop-shaped and located outside the mechanical joining means, the mechanical joining means does not directly crush the adhesive bead, and the adhesive spreads in the same manner as described above. If the amount is small, the protrusion of the adhesive can be greatly suppressed or prevented.

  In particular, in the second and eighth aspects of the invention, the adhesive layer is formed in advance as a plurality of loop-shaped adhesive beads arranged in a series of glasses and in series. Even if a non-penetrating rivet is driven as a mechanical joining means in the vicinity, it is possible to greatly suppress or prevent the adhesive from protruding from the edge of one of the metal panels.

  According to the first aspect of the present invention, the periphery of the mechanical joining means can be reliably sealed in a loop shape without applying an adhesive to the entire joining surface as in the prior art, and the spread of the loop adhesive is small. Therefore, it is possible to greatly suppress or prevent the protrusion. As a result, it is possible to simplify or eliminate the need to wipe off the protruding adhesive. Further, since the mechanical joining means and the adhesive are not in direct contact, the presence of the adhesive does not affect the joining strength of the mechanical joining means.

  According to the second and eighth aspects of the invention, on the premise of the technique of the first aspect, a plurality of loop-shaped adhesive beads are arranged substantially in the shape of glasses and in series between the two panels. The adhesive layer is formed in advance, and the vicinity of the edge of one metal panel is fastened and joined using a plurality of non-penetrating rivets as mechanical joining means. In addition to the same effect as the above, it is possible to greatly suppress or prevent the protrusion of the adhesive from the edge of one metal panel.

  FIGS. 1 to 7 are views showing a preferred embodiment of the present invention. In the automobile body as exemplified above, a roof panel (aluminum-based metal panel) made of aluminum (including an aluminum alloy) which is a component of the automobile body. ) 1 and an example of a joint portion between a body side panel (non-aluminum metal panel) 2 made of steel (steel plate).

  First, in order to facilitate understanding of the present invention, a general joining procedure between the aluminum roof panel 1 and the steel body side panel 2 will be described with reference to FIGS. .

  As shown in FIG. 1A, the roof panel 1 that has been drawn and formed into a predetermined shape in the previous step is turned upside down so that the surface on the vehicle interior side is the upper side, A viscous adhesive B is applied in a bead shape to the flange portion 1a serving as the joint surface using, for example, a robot-driven application gun 3. As the adhesive B, for example, a thermosetting one-component epoxy adhesive is used from the viewpoint of rust prevention.

  Next, as shown in FIG. 5B, the roof panel 1 coated with the adhesive B is turned upside down and set on the body side panel 2 which is the opposite side, and the roof panel 1 is turned on as shown in FIG. The flange portion 1a is overlapped with the flange portion 2a on the body side panel 2 side so that the adhesive B is sandwiched therebetween so that the flange portion 1a on the panel 1 side is on the upper side.

  If the two flange portions 1a and 2a are overlapped with each other in this way, as shown in FIG. 2A, the die 4 and the punch 5 which are rivet driving jigs are used as mechanical joining means. A non-penetrating rivet, that is, a self-piercing rivet R is driven from the flange portion 1a side of the roof panel 1 and mechanically fastened and joined. The relative positional relationship between the roof panel 1 and the body side panel 2 fastened and joined with the self-piercing rivet R is as shown in FIG. The whole vehicle body is subjected to electrodeposition coating (so-called undercoating), and further subjected to heat curing in an oven for the purpose of baking the electrodeposition coating film. The heating condition at this time is, for example, about 170 ° C. × 20 minutes as described above, and the adhesive interposed in the fastening / joining portion between the roof panel 1 and the body side panel 2 is also heated and cured at the same time. It will be.

  The car body that has been subjected to electrodeposition coating and subsequent baking (heat-curing) treatment is provided with a sealing material for the purpose of ensuring the sealing properties (so-called airtightness and watertightness) for each panel in the next sealing process. In addition to being applied in a bead shape, a so-called fusible insulator having heat-fusibility is set on the floor surface or the like. The fastening / joining portion between the roof panel 1 and the body side panel 2 described above is not an exception, and as shown in FIGS. 3A and 3B, the edge of the flange portion 1a on the roof panel 1 side. And a viscous seal material S different from the previous adhesive along the edge e of the flange portion 1a at the corner formed by the flange portion 2a on the side of the body side panel 2 is bead-shaped by the sealing nozzle 6 In addition, the bead-shaped sealing material S is smoothly finished as required.

  Thereafter, the vehicle body is heat-cured in a so-called sealing oven for the purpose of curing the sealing material S and fusing the fusible insulator, and then finishing the coating in the order of intermediate coating and top coating. Become.

  In such a series of steps, as shown in FIG. 1A, when applying the viscous adhesive B to the flange portion 1a on the roof panel 1 side in a bead shape, in addition to FIG. 4 (A) and (B), when the two flange portions 1a and 2a are overlapped with each other and fastened and joined with the self-piercing rivet R, the amount of the joint surface can be covered. Adhesive B is applied. 4A is a plan view of FIG. 1B, and FIG. 4B is a plan view of FIG. 2B.

  More specifically, as shown in FIGS. 1 and 4, the adhesive B applied in a bead shape to the flange portion 1a of the roof panel 1 is self-adhesive after overlapping the flange portions 1a and 2a. When fastened and joined with the pierce rivet R, the adhesive B is applied to the entire joining surface between the flange portions 1a and 2a as shown in FIG. 4 (B) in addition to FIG. 1 (C) and FIG. 2 (A). A part of the adhesive B protrudes from the edge e of the flange portion 1a on the roof panel 1 side. The protrusion of the adhesive B is as described above as [Problems to be solved by the invention]. Since the protruding adhesive B is close to the punch 5 for driving the self-piercing rivet R as shown in FIG. 2A, it may adhere to the punch 5, and the protruding adhesive B If it is cured as it is, it becomes an obstacle when the sealing material S is applied by the sealing nozzle 6 as shown in FIGS.

  Therefore, in the present embodiment, an attempt is made to provide a construction method that can prevent the adhesive B from protruding.

  When the state of protrusion of the adhesive B accompanying the driving of the self-piercing rivet R as described above is observed in detail, as shown in FIGS. 4 (A) and 4 (B), the adhesive was initially bead-shaped. While B is crushed and spreads over the entire joining surface of the flange portions 1a and 2a, as shown in FIG. 4B, the die 4 and punch 5 which are involved in driving the self-piercing rivet R are added. The pressure region (including the driving position of the self-piercing rivet R) tends to protrude largely concentrically outside.

  Therefore, in the present embodiment, instead of the conventional method (see FIG. 4A) in which the adhesive B is applied in a bead shape and in a straight shape, as shown in FIG. The adhesive B1 is applied in a bead shape, and the adhesive layer 10 having a wider width than that of the conventional one shown in FIG. 4A in plan view is formed with the loop-shaped adhesive bead B1.

  FIG. 5 shows the joining structure of the roof panel 1 and the body side panel 2 in the present embodiment, and in the fastening / joining state by the self-piercing rivet R, the self-piercing surface between the flange portions 1a and 2a has its self. A circular closed loop adhesive layer 10 is interposed around the pierce rivet R so as to be concentric with the pierce rivet R so as not to contact the self-pierce rivet R. It should be noted that a viscous sealing material S different from the adhesive B1 is applied afterwards to a corner portion formed by the flange portion 1a on the roof panel 1 side and the flange portion 2a on the body side panel 2 side, so-called sealing. A bead is formed.

  That is, in the state where the roof panel 1 is turned upside down as in FIG. 1A, as shown in FIG. 6A, the flange portion 1a of the roof panel 1 and the end of the flange portion 1a. Adhesive B1 is continuously applied in the vicinity of the edge e with a circular closed loop-shaped trajectory, and an adhesive layer 10 having a predetermined width dimension in which a plurality of loop-shaped adhesive beads B1 are arranged in a series of glasses is arranged in advance. Form. The width dimension of the adhesive layer 10 is not limited to the diameter of the loop-shaped adhesive bead B1 which is a unit element, and each loop-shaped adhesive bead B1 maintains the independence of each loop-shaped adhesive bead B1. Adjacent loop adhesive beads B1, B1 are connected to each other with a tangential or envelope bridge portion m to be shared, and the intersections of the strands in each loop adhesive bead B1 The bridge portion m is applied so as to be positioned on the edge e side of the flange portion 1a in the roof panel 1.

  6 (A) shows the state before pressurizing with the adhesive B1 (adhesive layer 10) applied to the flange portion 1a of the roof panel 1 as in FIGS. 1 (A) and 1 (B). FIG. 2B shows a state in which pressure is applied prior to driving of the self-piercing rivet R in the same manner as in FIG. 1C and FIG. 2A, and FIG. Indicates the completed state.

  However, as shown in FIGS. 2 (A) and 4 (B), the pressurizing area of the die 4 and punch 5 that controls the driving of the self-piercing rivet R (the die 4 and punch 5 are cylindrical). If the adhesive bead B is within Q, the adhesive B protrudes greatly outside the pressurization region Q when the self-piercing rivet R is driven as described above. It is.

  Therefore, in the present embodiment, the adhesive B1 is continuously applied with a circular closed loop-shaped trajectory, and an adhesive having a predetermined width dimension in which a plurality of loop-shaped adhesive beads B1 are arranged in a substantially glasses shape in series. When the layer 10 is formed, the loop-shaped adhesive bead B1 that is a unit element is larger in diameter than the pressure region Q, that is, the loop-shaped adhesive bead B1 that is a unit element is The diameter of the loop-shaped adhesive bead B1 is determined in advance so as to be located outside the pressurizing region Q. For example, if the diameter of the pressure region Q is about 18 mm, the diameter of the loop of the adhesive bead B1 is about 25 mm. At the same time, the diameter of the loop-shaped adhesive bead B1 before pressurization is larger than the maximum diameter of the self-piercing rivet R (the diameter of the head of the self-piercing rivet R) in the fastened / joined state of FIG. Means that.

  In setting the pitch P of the loop-shaped adhesive bead B1 which is a unit element, it is assumed that n times the pitch P is equal to the pitch of the driving position of the self-piercing rivet R, and at the same time the roof When a mounting hole 7 for mounting a so-called fashion roof rail is provided on the panel 1, the mounting hole 7 and the center of any loop-shaped adhesive bead B1 coincide with each other, and the outer peripheral side of the mounting hole 7 The loop adhesive bead B1 is preliminarily considered so as to surround it. Thus, by avoiding the strands of the loop-shaped adhesive bead B1 from passing through the opening of the mounting hole 7, the adhesive B1 is dropped from the mounting hole 7 or the loop-shaped adhesive bead B1 is interrupted. Can be prevented in advance.

  The application of the adhesive B1 as described above is performed by, for example, supporting the application gun 12 on the tip of the robot arm 11 of the sealing robot as shown in FIG. While being moved linearly along the longitudinal direction of the flange portion 1a, the coating operation is performed while rotating the coating gun 12 itself under a predetermined curvature radius in synchronization with the movement. Of course, the application gun 12 may be applied by moving the adhesive bead B1 along the same trajectory as the trajectory to be applied in a loop.

  If the adhesive B1 is applied to the flange portion 1a of the roof panel 1 with a loop-like locus in this way, the flange portion 1a on the roof panel 1 side and the flange on the body side panel 2 side are performed in the same procedure as in FIGS. After overlapping the portion 2a, a plurality of self-piercing rivets R are driven at a predetermined pitch from the flange portion 1a side of the roof panel 1 to fasten and join the two. As described above, FIG. 6B shows a state in which pressure is applied by the die 4 and the punch 5 immediately before the self-piercing rivet R is driven, and FIG. 6C shows that the self-piercing rivet R is driven. The self-piercing rivet R is driven into the center portion of the loop-shaped specific adhesive bead B1. As a result, the joint structure shown in FIG. 5 is obtained.

  Here, as shown in FIG. 6 (C) in addition to FIG. 5, even if the adhesive layer 10 is crushed when the self-piercing rivet R is driven, each loop-shaped element that is a unit element of the adhesive layer 10 is formed. Since there is no adhesive inside the adhesive bead B1, unlike the case where the adhesive is present on the entire joint surface of the flange portions 1a, 2a as shown in FIG. The adhesive B1 is only crushed so that the bead shape that is the strand of each loop becomes wide, and the self-piercing rivet R is not struck in the loop-shaped adhesive bead B1. It is possible for the adhesive to spread to the inside of the loop. Therefore, at least the edge e of the flange portion 1a is prevented from protruding the adhesive to the outside, and the adhesive bead B1 does not come into contact with the self-piercing rivet R after the completion of driving. As a result, the adhesive does not adhere to the dies 4 and punches 5 that control the driving of the self-piercing rivet R, and the adhesive that protrudes as in the past is applied to the sealing material S in the subsequent process ( (See Fig. 3).

  That is, according to the present embodiment, the self-piercing rivet R that has been driven in does not directly contact the adhesive, but the self-piercing rivet R with the smallest inter-panel gap and the highest risk of electrolytic corrosion is present. In addition to the intersection of the strands in each loop-shaped adhesive bead B1, the bridge portion m connecting adjacent loop-shaped adhesive beads B1 and B1 can be connected to the flange portion 1a. Since it is set on the edge e side, it is possible to continuously seal the edge e side of the flange portion 1a where water can easily enter, and to ensure sufficient sealing performance and thus rust prevention. It becomes.

  In addition, since the adhesive does not protrude from the edge e of the flange portion 1a, it is not necessary to apply the adhesive to the entire joining surface as in the prior art. In addition to reducing the amount of adhesive used, the amount of adhesive used is small, so even if the roof panel 1 after application of the adhesive is reversed, the adhesive can be used. It won't sag. Further, since no adhesive is present in the rivet fastening portion, the plastic deformation behavior of the self-piercing rivet R does not change due to the influence of the viscosity of the adhesive, and stable rivet fastening can always be performed. This makes it easy to guarantee the bonding strength by rivet fastening.

  FIGS. 8 and 9 show a second embodiment of the present invention. FIG. 8 corresponds to FIG. 6 and FIG. 9 corresponds to FIG. Is attached.

  In the second embodiment, as shown in FIG. 9, the coating gun 13 is moved by the robot arm 11 along the locus of the loop adhesive bead B2, and the loop adhesive bead B2 is moved. An adhesive layer 10 as a main element is formed. Then, when forming the adhesive layer 10 having a predetermined width dimension in which a plurality of loop-shaped adhesive beads B2 are arranged substantially in the shape of glasses and in series, the respective loop-shaped adhesive beads B2 are arranged in the longitudinal direction of the flange portion 1a. It is formed as an oval or ellipse having a major axis in the direction. Also in this case, the pressurization area Q by the die 4 and the punch 5 and the fashion roof rail mounting hole 7 are set on the inner peripheral side of the loop adhesive bead B2.

  According to the second embodiment, since the loop-shaped adhesive bead B2 is particularly oval or elliptical, the total number of loops of the adhesive bead B2 can be reduced, and the trajectory can be easily controlled. There is an advantage to become.

  FIGS. 10 to 12 are views showing a third embodiment of the present invention. In the adhesive application operation, the application state and thus the adhesive bead B1 after application are monitored. Portions common to the first embodiment, that is, FIGS.

  In the third embodiment, when the roof panel 1 is turned upside down, a part of the application locus of the loop-shaped adhesive bead B1 on the flange portion 1a, for example, a portion corresponding to the bridge portion m in FIG. In order to carry out the marking, a downwardly protruding fine embossed portion 14 is formed in advance at a predetermined pitch as a mark serving as a reference position, while a plurality of loop-shaped adhesive beads B1 are arranged in a substantially glasses shape and in series. In forming the adhesive layer 10 having a predetermined width dimension, the locus at the time of applying the adhesive bead is controlled so as to cover the fine embossed portion 14 with the adhesive bead B1.

  In parallel with or after the adhesive application operation, the adhesive bead B1 is imaged by the CCD camera 15 that functions as a visual sensor or an imaging means, while the image is processed by the image processing apparatus. 16, the presence or absence of the fine embossed portion 14 is determined by the image processing apparatus 16 to determine the suitability of the application trajectory of the adhesive bead B1.

  For example, when the presence or absence of the fine embossed portion 14 is still recognized as a result of the presence / absence determination of the fine embossed portion 14 in the captured image of the adhesive bead B1 as described above, the position of the application trajectory of the adhesive bead B1 is detected. It is determined that there is a deviation or meandering, for example, an alarm is issued based on the output from the image processing device 16, and the operator is prompted to confirm the adhesive bead B1 after application.

  By doing so, it is possible to prevent the roof panel 1 having a poor application state of the adhesive bead B1 from flowing out to the subsequent process as it is, and the adhesive application reliability is improved.

It is a figure which shows the conventional general joining procedure in the junction part of the roof panel of a vehicle body, and a body side panel, and is process explanatory drawing from the application of an adhesive agent to pressurizing the adhesive agent. It is a figure which shows the conventional general joining procedure in the junction part of the roof panel of a vehicle body, and a body side panel, and is process explanatory drawing at the time of the self-piercing rivet driving following application | coating of the adhesive agent of FIG. It is a figure which shows the conventional general joining procedure in the junction part of the roof panel of a motor vehicle body, and a body side panel, and is process explanatory drawing at the time of the sealing material application | coating following driving of the self-piercing rivet of FIG. It is a figure which shows the expansion of the adhesive agent at the time of self-piercing rivet driving | operation, (A) is plane explanatory drawing of (B) of FIG. 1, (B) is plane explanatory drawing of (B) of FIG. The principal part expanded sectional view which shows the joining structure of a roof panel and a body side panel as the 1st Embodiment of this invention. It is a figure which shows the application | coating procedure of the adhesive agent used for the joining structure of FIG. 5, (A) is plane explanatory drawing which shows the state after pressurization of an adhesive agent and before pressurization, (B) is driving | injection of a self-piercing rivet. An explanatory plan view when the adhesive is pressed and crushed in advance, (C) is an explanatory plan view after completion of the self-piercing rivet driving. (A) is explanatory drawing which shows the outline of the equipment used for the application | coating operation | work of the adhesive agent shown in FIG. 6, (B) is the principal part enlarged view of the figure (A). It is a figure which shows the 2nd Embodiment of this invention, and is plane explanatory drawing of a site | part equivalent to FIG. (A) is explanatory drawing which shows the outline of the installation used for the application | coating operation | work of the adhesive agent shown in FIG. 8, (B) is a principal part enlarged view of the figure (A). It is a figure which shows the 3rd Embodiment of this invention, (A) is plane explanatory drawing of the flange part in a roof panel, (B) is an expanded sectional view which follows the aa line | wire of the same figure (A). (A) is plane explanatory drawing when an adhesive agent is apply | coated to the flange part shown to (A) of FIG. 10, (B) is an expanded sectional view which follows the bb line of the same figure (A). Explanatory drawing which shows the monitoring state of the adhesive bead shown in FIG.

Explanation of symbols

1 ... Roof panel (aluminum-based metal panel)
1a ... Flange 2 ... Body side panel (non-aluminum metal panel)
2a ... Flange part 4 ... Die (driving jig)
5 ... Punch (driving jig)
10 ... Adhesive layer 14 ... Micro embossed part (mark as reference position)
16 ... CCC camera (visual sensor as monitoring means)
B1 ... Loop adhesive bead B2 ... Loop adhesive bead e ... Edge of flange part m ... Bridge part Q ... Pressure area R ... Self-piercing rivet (non-penetrating rivet, mechanical coupling means)
S ... Sealing material (seal bead)

Claims (15)

A dissimilar metal panel in which a viscous adhesive is interposed between an aluminum-based metal panel and a non-aluminum-based metal panel, and the two are superposed and fastened and joined together by mechanical joining means. A joining structure of
Apply an adhesive to the joining surface of at least one of the metal panels to form a loop-shaped adhesive bead in advance,
The dissimilarity is characterized in that it is fastened and joined by a mechanical joining means so as not to contact the adhesive bead at a position corresponding to the central part of the loop-shaped adhesive bead among the overlapped portions of both metal panels. Metal panel joint structure. A thick adhesive is interposed between the aluminum-based metal panel and the non-aluminum-based metal panel, and the two are overlapped. It is a joining structure of dissimilar metal panels formed by mechanically fastening and joining a plurality of non-penetrating rivets along the longitudinal direction of the edge,
Adhesive is continuously applied to the joint surface of at least one of the metal panels with a loop-shaped trajectory, and an adhesive layer in which a plurality of loop-shaped adhesive beads are arranged in a series of glasses is formed in advance. And
It is characterized in that a rivet is driven and mechanically fastened and joined at a position corresponding to the central part of the loop-shaped adhesive bead in the overlapped part of both metal panels so as not to contact the adhesive bead. Bonding structure of dissimilar metal panels.   3. The dissimilar metal panel joining structure according to claim 1, wherein an inner diameter of the loop-shaped adhesive bead is set to an outside of a maximum rivet diameter after fastening and joining.   4. The dissimilar metal panel joining structure according to claim 2, wherein the loop-shaped adhesive bead has an oval shape having a major axis in a direction in which the adhesive beads are arranged in parallel.   The dissimilar metal panel joining structure according to any one of claims 2 to 4, wherein the non-penetrating rivet is a self-piercing rivet.   6. The joining structure of dissimilar metal panels according to claim 5, wherein the aluminum-based metal panel is a roof panel of a vehicle body of the automobile, and the non-aluminum-based metal panel is a steel body side panel of the vehicle body of the automobile.   A fillet-like seal bead different from the adhesive is formed along the edge of the roof panel at the overlapping portion of the roof panel and the body side panel with the roof panel as an upper side. Item 7. A joining structure of dissimilar metal panels according to Item 6. A thick adhesive is interposed between the aluminum-based metal panel and the non-aluminum-based metal panel, and the two are overlapped. A method for joining dissimilar metal panels in which a plurality of non-penetrating rivets are driven along the longitudinal direction of the edge and mechanically fastened and joined,
Adhesive is continuously applied to the joint surface of at least one of the metal panels with a loop-shaped trajectory, and an adhesive layer in which a plurality of loop-shaped adhesive beads are arranged in a series of glasses is formed in advance. An adhesive application process,
A joining step in which a rivet is driven and mechanically fastened and joined so as not to contact the adhesive bead at a position corresponding to the central part of the loop-shaped adhesive bead among the overlapping portions of both metal panels;
A method for joining different types of metal panels.   The loop-shaped adhesive bead is formed to have a size that is located outside a pressurizing range of a driving jig that is in contact with a metal panel or a rivet and is involved in driving the rivet. Item 9. A method for joining dissimilar metal panels according to Item 8.   The method for joining dissimilar metal panels according to claim 8 or 9, wherein the shape of the loop-shaped adhesive bead is an oval shape having a major axis in a direction in which the adhesive beads are arranged in parallel.   The method for joining dissimilar metal panels according to any one of claims 8 to 10, wherein the non-penetrating rivet is a self-piercing rivet.   12. The method for joining dissimilar metal panels according to claim 11, wherein the aluminum-based metal panel is a roof panel of a vehicle body of the automobile, and the non-aluminum-based metal panel is a steel body side panel of the vehicle body of the automobile.   At the overlap between the roof panel and the body side panel with the roof panel as the upper side, after the self-piercing rivet has been driven, a seal bead different from the adhesive is applied in a fillet shape along the edge of the roof panel. The method for joining dissimilar metal panels according to claim 12, further comprising a step. Monitor the relative positional relationship between the reference position on the metal panel side and the adhesive bead during the adhesive application work or after the adhesive application work is completed,
The method for joining dissimilar metal panels according to any one of claims 8 to 13, wherein the suitability of the adhesive bead is determined according to the monitoring result. Marking is performed in advance on or near the position of the bonding surface of the metal panel to which the adhesive is to be applied and the locus of the loop-shaped adhesive bead,
While applying the adhesive so as to be in a predetermined positional relationship with this marking, a loop-shaped adhesive bead is formed,
Monitor the relative positional relationship between the marking and the adhesive bead during the adhesive application or after the adhesive application.
The method for joining dissimilar metal panels according to claim 14, wherein the suitability of the adhesive bead is determined according to the monitoring result.

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