JP2008221947A - Vehicle body joining method and its joining structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To join without generating burrs in a flange part of a roof panel when joining the flange part of the roof panel forming a window glass bonding surface and the flange part of a header, in a vehicle body joining method and its joining structure. <P>SOLUTION: A flange part 7a forming a window glass bonding surface 7b of a roof panel 7 of an aluminum alloy as an upper plate and a flange part 4a of a front header 4 of an aluminum alloy as a lower plate are placed one upon another, a rotary tool 14 is rotatingly pressed to the flange part 4a of the front header 4 from inside the cabin, and the flange part 7a of the roof panel 7 and the flange part 4a of the front header 4 are subjected to friction spot welding, therefore the window glass bonding surface 7b of the flange part 7a of the roof panel 7 can be shaped into a flat surface. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle body joining method for joining a metal roof panel and a metal header, and a joining structure thereof.

  In automobile bodies and the like, a structure in which an aluminum plate is used in combination with a steel plate structure has been widely put into practical use mainly for the purpose of reducing the weight. As a joining technique for joining the steel sheet and the aluminum sheet, a mechanical joining technique using blind rivets, self-piercing rivets, clinching or the like is employed. For example, in the joint structure of vehicle body members disclosed in Patent Document 1, the joint portion of the aluminum roof panel is joined to the joint portion of the steel side roof rail, the joint portion of the front roof rail, the joint portion of the rear roof rail, and the like. Riveted by piercing self-piercing rivets.

On the other hand, in recent years, a friction point joining technique has been proposed in which a joining portion of a light metal constituent member and a joining portion of a metal constituent member having a coefficient of thermal expansion different from that of the light metal constituent member are joined using friction heat. Has been put to practical use. Using this friction point joining technique, for example, in a state where the joint portion of the roof panel made of aluminum alloy and the joint portion of the steel front header are overlapped, the roof panel side ( The roof panel and front header are pressed from the outside of the passenger compartment, and the roof panel softens and plastically flows due to frictional heat generated when the rotating tool comes into contact with the roof panel joint and rotates. It is conceivable to spot-join the joint between the head and the front header in a solid state. .
JP 2005-119777 A

  In the joint structure of vehicle body members disclosed in Patent Document 1, a large number of rivet joints are formed along the joints between the aluminum roof panel and the side roof rail, the front roof rail, and the rear roof rail. There is a problem that the joining cost including the cost becomes high.

  On the other hand, in the above-mentioned friction point joining structure, when joining the flange part forming the glass bonding surface of the roof panel and the flange part of the front header, the flange part of the roof panel is pressed while rotating the rotary tool from the roof panel side. Since the flange part of the roof panel and the flange part of the front header are friction point joined, the fluidized metal protrudes near the outer periphery of the rotating tool and hardens in a burr shape when joining with the rotating tool. A burr | flash generate | occur | produces in the flange part which forms an adhesive surface. Therefore, when window glass bonding is performed on a non-flat glass bonding surface, there is a problem that the window glass is bonded to the glass bonding surface in an unstable state, resulting in poor bonding.

  SUMMARY OF THE INVENTION An object of the present invention is to form a burr on the flange portion of the roof panel when joining the flange portion forming the window glass bonding surface of the roof panel and the flange portion of the header in the joining method and structure of the vehicle body. For example, it is possible to reduce the joining cost including the material cost.

  The vehicle body joining method according to claim 1 is a vehicle body joining method in which a metal roof panel and a metal header are joined, and a flange portion forming a window glass bonding surface of the roof panel and a flange portion of the header are overlapped. While rotating the rotary tool from the room side, it presses against the flange part of the header to generate frictional heat, softens the flange part of the header and causes plastic flow to join the flange part of the roof panel and the flange part of the header It is characterized by molding the joint.

The vehicle body joining method according to claim 2 is the invention according to claim 1, wherein the joint portion obtained by joining the flange portion of the roof panel and the flange portion of the header is a spot joint portion formed at a plurality of locations in the vehicle width direction. It is a feature.
According to a third aspect of the present invention, there is provided a method for joining vehicle bodies, wherein the roof panel and the header are members made of an aluminum alloy.

  The vehicle body joining method according to claim 4 is a vehicle body joining method in which a metal roof panel, a metal header, and a metal roof side member are joined together. Overlapping the flange part, while rotating the rotary tool from the vehicle interior side, press against the flange part of the header to generate frictional heat, soften at least the flange part of the header and generate plastic flow, and the flange part of the roof panel A first step of forming a first joint portion in which the flange portion of the header is joined, and then a second step of forming a second joint portion in which the roof panel and the header are joined to the roof side member. is there.

According to a fifth aspect of the present invention, there is provided a vehicle body joining method according to the fourth aspect of the invention, wherein the first joint portion joining the flange portion of the roof panel and the flange portion of the header is a spot joint portion formed at a plurality of locations in the vehicle width direction. It is characterized by that.
The vehicle body joining method of claim 6 is characterized in that, in the invention of claim 4 or 5, the roof panel and the header are members made of an aluminum alloy, and the roof side member is a member made of steel.

  According to a seventh aspect of the present invention, there is provided a vehicle body joining method according to the sixth aspect of the invention, wherein the roof side member includes a reinforcing plate member disposed on the vehicle interior side of the roof panel and the header, and the roof panel and the header are connected to the roof side member. The second step of joining the roof panel and the header includes a joining step of mechanically joining the roof panel and the header to the reinforcing plate member with an embedded rivet.

  The vehicle body joint structure according to claim 8 is a vehicle body joint structure in which a metal roof panel and a metal header are joined, and a flange portion forming a window glass bonding surface of the roof panel and a flange portion of the header are overlapped. While rotating the rotary tool from the room side, it presses against the flange part of the header to generate frictional heat, softens the flange part of the header and causes plastic flow to join the flange part of the roof panel and the flange part of the header A plurality of spot joints are provided.

  According to a ninth aspect of the present invention, there is provided the vehicle body joint structure according to the eighth aspect, wherein the joint portion obtained by joining the flange portion of the roof panel and the flange portion of the header is a spot joint portion formed in a plurality of locations in the vehicle width direction. It is a feature.

  According to a tenth aspect of the present invention, there is provided a vehicle body joining structure according to the eighth or ninth aspect, wherein the roof panel and the header are aluminum alloy members.

  The vehicle body joint structure according to claim 11 is a vehicle body joint structure in which a metal roof panel, a metal header, and a metal roof side member are joined together, and a flange portion that forms a wind glass bonding surface of the roof panel and a header flange. The parts of the roof panel are overlapped and pressed against the flange part of the header while rotating the rotary tool from the inside of the vehicle interior to generate frictional heat, and at least the flange part of the header is softened to cause plastic flow, and the flange part of the roof panel and the header The 1st junction part which joined this flange part, and the 2nd junction part which joined the roof panel and the header to the roof side member are provided.

According to a twelfth aspect of the present invention, there is provided the vehicle body joint structure according to the eleventh aspect, wherein the first joint portion is a spot joint portion formed in a plurality of locations in the vehicle width direction.
The vehicle body joining structure of claim 13 is characterized in that, in the invention of claim 12, the roof panel and the header are members made of an aluminum alloy, and the roof side member is a member made of steel.

  According to a fourteenth aspect of the present invention, there is provided the vehicle body joint structure according to the thirteenth aspect of the invention, wherein the roof side member includes a roof panel and a reinforcing plate member disposed on the vehicle interior side of the header, and the second joint portion includes the roof panel and the roof panel. It is a rivet joint part in which the header is mechanically joined to the reinforcing plate member with an embedded rivet.

  According to the first aspect of the present invention, the flange portion forming the window glass bonding surface of the roof panel and the flange portion of the header are overlapped and pressed against the flange portion of the header while rotating the rotary tool from the vehicle interior side. In order to form the joint part which joined the flange part of this and the flange part of the header, the following effect is acquired.

  As the rotary tool is rotated from the vehicle interior side, the flange portion of the header is pressed to join the flange portion of the roof panel and the flange portion of the header, so that burrs may occur on the window glass bonding surface of the flange portion of the roof panel. Absent. Therefore, the window glass bonding surface of the flange portion of the roof panel can be formed as a flat surface. Thereby, window glass adhesion | attachment can be easily performed with respect to a window glass adhesion surface.

According to the second aspect of the present invention, the joint portion obtained by joining the flange portion of the roof panel and the flange portion of the header is a spot joint portion formed at a plurality of locations in the vehicle width direction. It is not necessary to use rivet parts or the like for joining the flange portions, and the flange portions can be easily joined and the joining costs including the material costs can be reduced.
According to the invention of claim 3, since the roof panel and the header are members made of aluminum alloy, it is possible to reduce the weight of the vehicle body while ensuring the bonding strength by the rotary tool.

  According to invention of Claim 4, in the 1st process, the flange part which forms the window glass adhesion surface of a roof panel, and the flange part of a header are piled up, and it rotates on a flange part of a header, rotating a rotary tool from the vehicle interior side. Press to form a first joint portion that joins the flange portion of the roof panel and the flange portion of the header, and then forms a second joint portion that joins the roof panel and the header to the roof side member in the second step. Therefore, the following effects can be obtained.

  In the first step, the flange portion of the header and the flange portion of the header are joined by pressing the flange portion of the roof panel while rotating the rotary tool from the vehicle interior side. Will not occur. Therefore, the window glass bonding surface of the flange portion of the roof panel can be formed as a flat surface. Thereby, window glass adhesion | attachment can be easily performed with respect to a window glass adhesion surface. In addition, since the second joint portion is formed in the second step, it is possible to ensure the joint strength between the joint portions on both ends of the flange portion of the roof panel and the flange portion of the header.

  According to invention of Claim 5, since the 1st junction part which joined the flange part of the roof panel and the flange part of the header is a spot junction part formed in multiple places in the vehicle width direction, it is between a roof panel and a header. It is not necessary to use rivet parts or the like for joining the flange portions, and the flange portions can be easily joined and the joining costs including the material costs can be reduced.

  According to the sixth aspect of the present invention, since the roof panel and the header are made of an aluminum alloy and the roof side member is a steel member, the joint portion on both ends of the flange portion of the roof panel and the flange portion of the header It is possible to reliably ensure the bonding strength.

  According to the seventh aspect of the present invention, the roof side member includes the reinforcing plate member disposed on the vehicle interior side with respect to the roof panel and the header, and the second step includes embedding the roof panel and the header in the reinforcing plate member. Since it includes a joining process that mechanically joins with rivets, the joint strength of the second joint can be ensured reliably, and the wind glass bonding surface of the flange part of the roof panel is formed on a flat surface by an embedded rivet. can do. Furthermore, it is possible to reduce the number of second joints due to the mechanical joints, thereby reducing the joint costs including the material costs for the second joints.

  According to invention of Claim 8, the flange part which forms the window glass adhesion surface of a roof panel and the flange part of a header are piled up, and it presses against the flange part of a header, rotating a rotary tool from the vehicle interior side, and a roof panel. Since the plurality of spot joint portions obtained by joining the flange portion and the header flange portion are provided, the wind glass bonding surface of the flange portion of the roof panel can be formed on a flat surface. In addition, the same effects as those of the invention of claim 1 are obtained.

According to the ninth aspect of the present invention, since the joint portion obtained by joining the flange portion of the roof panel and the flange portion of the header is a spot joint portion formed in a plurality of locations in the vehicle width direction, it is the same as the invention of the second aspect. There is an effect.
According to the invention of claim 10, since the roof panel and the header are members made of aluminum alloy, the same effect as that of the invention of claim 3 is obtained.

  According to the eleventh aspect of the present invention, the flange portion forming the window glass bonding surface of the roof panel and the flange portion of the header are overlapped, and the roof tool is pressed against the flange portion of the header while rotating the rotary tool from the vehicle interior side. Since the first joint part that joins the flange part of the header and the flange part of the header, and the second joint part that joins the roof panel and the header to the roof side member, the wind glass bonding surface of the flange part of the roof panel is provided. Can be formed on a flat surface. In addition, the same effects as those of the invention of claim 4 are obtained.

According to the twelfth aspect of the present invention, since the first joint portion is a spot joint portion formed at a plurality of locations in the vehicle width direction, the same effect as that of the fifth aspect is achieved.
According to the invention of claim 13, since the roof panel and the header are members made of aluminum alloy and the roof side member is a member made of steel, the same effect as in claim 6 is produced.

  According to the fourteenth aspect of the present invention, the roof side member includes the reinforcing plate member disposed on the vehicle interior side of the roof panel and the header, and the second joint portion embeds the roof panel and the header in the reinforcing plate member. Since the rivet joint is mechanically joined with a mold rivet, the window glass bonding surface of the flange portion of the roof panel can be formed on a flat surface. In addition, the same effects as those of the invention of claim 7 are obtained.

  The present embodiment is an example in which the present invention is applied to a vehicle body joining method and a joining structure for joining a metal roof panel, a metal header, and a metal roof side member.

Embodiment 1 of the present invention will be described below with reference to the drawings. In addition, the following description includes the description about the joining method and joining structure of a vehicle body.
As shown in FIGS. 1 and 2, the body structure M of a wagon-type automobile includes a pair of left and right front pillars 1, a pair of left and right center pillars 2, a pair of left and right rear pillars 3, and a pair of left and right front pillars 1. A front header 4 that connects the upper ends of the rear pillars 5, a rear header 5 that connects the upper ends of the pair of left and right rear pillars 3, and the upper end of the front pillar 1, the upper end of the center pillar 2, and the vicinity of the upper end of the rear pillar 3. The left and right pair of roof side rails 6 and the roof structure are provided, and members other than the roof panel 7 and the front header 4 of the roof structure are made of steel plates. FIG. 2 is a plan view of a main part of the vehicle body structure M of the automobile shown with the roof panel 7 omitted.

  The roof structure is arranged at the upper end of the vehicle body structure M. The roof structure includes an aluminum alloy roof panel 7 and an aluminum alloy joined to the lower surface side of the roof panel 7 by friction point joining described later. The front header 4 made of steel, the rear header 5 made of steel, and a plurality of reinforcing plate members 8a to 8d made of steel are provided. Both end portions of the plurality of reinforcing plate members 8a to 8d, the front header 4 and the rear header 5 are joined to the roof panel 7 in advance by friction point joining in the sub-assembly process.

  Here, the friction point joining apparatus 9 which performs said friction point joining and other friction spot joining is demonstrated. As shown in FIGS. 3 and 4, the friction spot welding device 9 includes a robot 11 equipped with a welding gun 10, a control device 12 that drives and controls the robot 11 and the welding gun 10, and a friction spot welding ( And a workpiece holding device (not shown) for positioning and holding the two metal plate members to be spot-bonded.

  The robot 11 is a general-purpose 6-axis vertical articulated robot, and a joining gun 10 is provided at the tip of the robot hand. The robot 11 moves the metal component member, which is positioned and held by the workpiece holding device, between the spot bonding operation position and the standby position retracted from the bonding operation position.

  As shown in FIG. 4, the joining gun 10 includes a receiving tool 13, a rotating root 14, and a rotating tool driving mechanism 15. The receiving tool 13 and the rotating tool 14 are disposed so as to be opposed to each other vertically. The receiving tool 13 is detachably attached to an upper end portion of an inverted L-shaped arm 16 so that the rotating tool is driven on the lower side of the arm 16. A mechanism 15 is provided, and the rotary tool 14 is detachably attached to the rotary tool drive mechanism 15 so as to be detachable. The rotary tool drive mechanism 15 includes a rotary motor 17 that rotates the rotary tool 14 about the joining axis X, and an elevation motor 18 that raises and lowers the rotary tool 14 along the joining axis X to press a plurality of metal plate members. Have.

  As shown in FIG. 5, a shoulder portion 14 b is formed on the distal end surface (upper end surface) of the body portion 14 a of the rotary tool 14. The shoulder portion 14b has a flat shape, and a pin portion 14c having a small diameter projects from the center portion of the shoulder portion 14b. The receiving tool 13 is formed to have substantially the same diameter as that of the rotary tool 14, and the front end surface (lower end surface) thereof is formed flat.

  As shown in FIG. 3, the control device 12 is connected to various electric actuators (not shown) of the robot 11 via a harness 19 to drive and control these actuators. The elevator motor 18 is connected via a harness 20, a relay box 21, and harnesses 22a and 22b, and the rotary motor 17 and the elevator motor 18 are driven and controlled, respectively.

In the sub-assembly process, the case where the friction spot joining apparatus 9 is used to perform the friction spot joining between the flange portion 7a forming the window glass bonding surface 7b of the roof panel and the flange portion 4a of the front header will be described as an example.
As shown in FIGS. 6 to 8, the flange 7 a of the roof panel 7 is an upper plate, the flange 4 a of the front header is a lower plate, and the flange 4 a of the front header 4 is placed on the flange 4 a. Before the flange portion 7a of the roof panel 7 is overlapped, an adhesive layer 23 made of an electrically insulating adhesive for preventing electrolytic corrosion is formed on these contact surfaces.

  As the adhesive, a chemical reaction adhesive such as an epoxy adhesive, a urethane adhesive, or an acrylic adhesive is used. Next, the joining gun 10 is moved by the robot 11 so that the joining portion obtained by overlapping the flange portion 7a of the roof panel 7 and the flange portion 4a of the front header 4 is sandwiched between the receiving tool 13 of the joining gun 10 and the rotating tool 14. The receiver 13 is set above the joint, and the rotary tool 14 is set below the joint.

  While rotating the rotary tool 14 from the vehicle interior side by the rotary tool driving mechanism 15, the rotary tool 14 is lifted by the elevating motor 18 to press the rotary tool 14 against the flange portion 4 a of the front header 4. The flange portion 4a of the front header 4 softens and plastically flows due to frictional heat generated when the rotary tool 14 comes into contact with the flange portion 4a of the front header 4, and the flange portion 4a of the front header 4 and the flange of the roof panel 7 The joint portion of the part 7a is subjected to friction point joining (friction point joining in a solid phase state without melting) in a solid state at a temperature equal to or lower than the melting point.

This friction point welding (spot welding) will be described in detail.
As shown in FIG. 6, when the rotary tool 14 is raised and positioned while being rotated, and the pin portion 14 c of the rotary tool 14 abuts against and presses the lower surface of the flange portion 4 a of the front header 4, the flange portion of the front header 4. The lower surface of 4a is softened and sheared by frictional heat, and the fluidized aluminum alloy protrudes from the surface near the outer periphery of the pin portion 14c of the rotary tool 14 on the lower surface of the flange portion 4a of the front header 4.

  Next, as shown in FIG. 7, the pin portion 14 c enters the joint portion of the flange portion 4 a of the front header 4 in which the rotary tool 14 continues to rise further and is softened. The joint portion of the front header 4 a at a high portion is sheared, and the adhesive layer 23 is pushed out from the sheared portion by the pressing force of the rotary tool 14. Further, when the rotary tool 14 is pressed and the pin portion 14c enters the joint portion of the flange portion 7a of the roof panel 7, the joint portion of the flange portion 4a of the front header 4 and the joint portion of the flange portion 7a of the roof panel 7 are formed. The plastic flow part A (plastic deformation part) is generated, the shear part spreads to the outer periphery, and the material of the flange part 7a of the roof panel 7 is annularly raised downward into the flange part 4a of the front header 4 around the pin part 14c. And both the flange parts 4a and 7a are joined in a solid state. In addition, the fluidized aluminum alloy protrudes from the lower surface of the flange portion 4a of the front header 4 to the vicinity of the outer periphery of the body portion 14a of the rotary tool 14.

  Next, as shown in FIG. 8, the joint portion of the flange portion 4a of the front header 4 and the joint portion of the flange portion 7a of the roof panel 7 are subjected to friction point joining, the rotary tool 14 is lowered, and the front after the friction point joining is performed. On the lower surface of the flange portion 4a of the header 4, the fluidized aluminum alloy is hardened in a burr shape. On the other hand, the window glass bonding surface 7a of the flange portion 7a of the roof panel 7 remains a flat surface.

  As shown in FIG. 10, the friction spot joint 25 formed by the friction spot joint as described above is a friction between the joint of the flange 4 a of the front header 4 and the joint of the flange 7 a of the roof panel 7. The structure is such that the window glass bonding surface 7b of the roof panel 7 is a flat surface by spot bonding. And this friction point junction part 25 is formed in multiple places at predetermined intervals along the vehicle width direction of the flange part 7a of the roof panel 7, and the flange part 4a of the front header 4. FIG. A rubber sealer (applied intermittently along the vehicle width direction between the roof panel 7 and the front header 4 other than the joints of the flange portions 4a and 7a and foamed by the heat of the coating and drying furnace ( The body sealer 46 is disposed, and the roof panel 7 and the front header 4 are bonded to each other by the sealer 46, and the rigidity of the roof panel 7 is secured. The sealer 46 is made of, for example, a mixture of an elastomer such as butyl rubber or polyisobutylene and an adhesive resin.

  In the sub-assembly process, using the friction point joining device 9 in the same manner as described above, the rotary tool 14 is pushed into only the flange portion 7a of the roof panel 7 made of aluminum alloy while being rotated, and is made of steel by plastic flow of the aluminum alloy material. The rear header 5 and the steel reinforcing plate members 8a to 8d are joined in a solid state. That is, the rear header 5 is joined to the roof panel 7 by the friction point joining portion 27. Further, both end portions of the reinforcing plate member 8a are joined to the roof panel 7 by the friction point joining portion 30, and both end portions of the reinforcing plate member 8b are joined to the roof panel 7 by the plurality of friction point joining portions 31. Both end portions of 8c are joined to the roof panel 7 by a plurality of friction joint portions 32, and both end portions of the reinforcing plate member 8d are joined to the roof panel 7 by a plurality of friction point joint portions 33.

  As described above, in the sub-assembly process, as shown in FIGS. 1 and 2, the friction point where the joint portion of the flange portion 7 a of the roof panel 7 and the joint portion of the flange portion 4 a of the front header 4 are subjected to friction point joining. A front end side friction joint region 26 in which a plurality of joint portions 25 are formed in the vehicle width direction is formed, and the joint portion of the rear end portion of the roof panel 7 and the joint portion of the flange portion 5a of the rear header 5 are friction point joined. A rear end side friction joining region 28 is formed by forming a plurality of friction spot joining portions 27 in the vehicle width direction. The step of friction point joining the front header 4 to the roof panel 7 corresponds to the first step of the present invention.

  As shown in FIGS. 1 and 2, the roof panel 7 sub-assembled as described above is rotated by the friction point joining device 9 so that the rotary tool 14 is rotated only to the flange portion 7a of the roof panel 7 made of aluminum alloy. However, plastic flow is generated in the indented aluminum alloy material, and friction point joining is performed to the left and right roof side rails 6. That is, the right end side friction joint region in which a plurality of friction point joint portions 29 in which the joint portions of the flange portions 7a at the left and right ends of the roof panel 7 and the left and right roof side rails 6 are friction spot joined are formed in the longitudinal direction of the vehicle body. 34A and the left end side friction welding area 34B are formed. It should be noted that a plurality of friction point joints between the roof panel 7 and the left and right roof side rails 6 are accumulated sequentially due to the thermal expansion of the roof panel 7 in the vehicle front-rear direction. It is preferable for suppressing thermal strain deformation.

  Next, after the roof panel 7 is joined by friction spot joining in the first step, in the second step, as shown in FIGS. 2 and 11, between the front end side friction joining region 26 and the right end side friction joining region 34A. In the joining region between the front end side friction joining region 26 and the left end side friction joining region 34B, the both ends of the flange portion 7a of the roof panel 7 and the flange portions 4a of both ends of the front header 4 are connected to each other. The rivet joint portion 35a is mechanically joined to the reinforcing plate member 1a of the front pillar 1 disposed on the vehicle interior side with respect to the roof panel 7 and the front header 4 by using an embedded self-piercing rivet 36.

  As shown in FIG. 2, in the second step, a plurality of (five points) rivet joints 35a to 35e are sequentially formed in the joint region between the front end side friction joint region 26 and the right friction joint region 34A. Is done. That is, the flange portion 7a of the roof panel 7 and the front end portion of the roof side rail 6 are joined to the reinforcing plate member 1a of the front pillar 1 by the rivet joint portion 35a, and the flange portion 7a of the roof panel 7 is fronted by the rivet joint portion 35b. The reinforcing plate member 1a of the pillar 1 is joined, the flange portion 7a of the roof panel 7 and the flange portion 4a of the front header 4 are joined to the reinforcing plate member 1a of the front pillar 1 by the rivet joint portion 35c, and the front header 4 has a plurality of points. Are joined to the reinforcing plate member 1a of the front pillar 1 by the joint portions 35d and 35e. The same applies to a plurality of rivet joints 35a to 35e formed in a joint region between the front end side friction joint region 26 and the left end side friction joint region 34B.

  A rivet joint fastening device (not shown) used to form the rivet joint portions 35a to 35e of the plurality of points is a device that performs rivet joining using an embedded self-piercing rivet 36 (see FIG. 9). A rivet driving gun and a rivet cradle are provided. A rivet receiving base is inserted from a hole 4b formed in the vicinity of both ends of the front header 4, a rivet driving gun is operated from the outside of the vehicle body, and a self-piercing rivet 36 is driven into the connecting portion so that a plurality of rivet connecting portions 35c.about. 35e is formed.

Here, among the rivet joint portions 35a to 35e at the front side, the flange portion 7a of the roof panel 7, the flange portion 4a of the front header 4, and the reinforcing plate member 1a of the front pillar 1 are mechanically joined. The structure of the rivet joint 35c will be described.
As shown in FIGS. 9 and 11, an adhesive layer 23 is formed on the upper surface of the joint portion of the flange portion 4 a of the front header 4, and the joint portion of the flange portion 7 a of the roof panel 7 is overlaid on the adhesive layer 23. An embedded self-piercing rivet 36 is driven from the roof panel side by the above-described rivet joint fastening device in a state where the reinforcing plate member 1a of the front pillar 1 is overlapped from below on the lower surface of the joint portion of the flange portion 4a of the header 4. Perform riveting with.

  In the rivet joint 35c (mechanical joint), a joint of the aluminum alloy roof panel 7, a joint of the aluminum alloy front header 4, and a joint of the reinforcing plate member 1a of the steel front pillar 1 are provided. These three plate members are riveted to form a structure in which the window glass bonding surface 7b of the flange portion 7a of the roof panel 7 is a flat surface.

  Further, as shown in FIG. 9, in the rivet joint portion 35 c, the head of the self-piercing rivet 36 is driven until it is not exposed from the window glass bonding surface 7 b of the roof panel 7. And the leg part 36a of the rivet 36 penetrates the joint part of the flange part 7a of the roof panel 7 and the joint part of the flange part 4a of the front header 4, but penetrates the joint part of the reinforcing plate member 1a of the front pillar 1. Instead, the leg portion 36a of the rivet 36 expands in a taper shape within the joint portion of the reinforcing plate member 1a of the front pillar 1 to be in a caulking state. Since the other rivet joints 35a, 35b, 35d, and 35e are also rivet joined using the embedded self-piercing rivet 36 in the same manner as described above, the wind glass bonding surface 7b of the roof panel 7 flange 7a is formed. The structure is a flat surface.

  Further, both ends of the roof panel 7 are formed in the joining region between the right end side joining region 34A and the rear end side friction joining region 28 and in the joining region between the left end side friction joining region 34B and the rear end side joining region 28. The joints in the vicinity are joined to the joints in the vicinity of both ends of the rear header 5 and the hinge reinforcing plate member and the corner reinforcing plate member of the back door by a plurality of rivet joints 37 and 38.

Here, the case where the window glass 39 is attached to the flange portion 7a of the roof panel 7 that is friction-point bonded to the flange portion 4a of the front header 4 by the above-described friction point bonding method will be described as an example.
As shown in FIG. 12, in order to attach the window glass 39 to the window glass bonding surface 7 b of the roof panel 7, a ceramic layer (ceramic coat) 40 is formed on the inner surface of the peripheral portion of the window glass 39. A strip-shaped primer coating film 41 is formed on the surface.

  A urethane adhesive 42 is applied to the surface of the primer coating film 41, and a primer coating film 41 is also formed on the flat surface of the window glass bonding surface 7b of the roof panel 7. As shown in FIG. A window glass 39 is bonded to 7 b via a urethane adhesive 42.

  The ceramic layer 40 is provided to cover the bonding portion between the vehicle body and the window glass 39, and the window glass 39 (primer coating film 41) is replaced with the urethane adhesive 42 by the primer coating film 41 formed on the ceramic layer 40. With this, the adhesive strength for bonding to the vehicle body is increased. In addition, 43 is a dam material which fastens a urethane adhesive, and 44 is a molding molding material.

  The roof side rail 6 corresponds to a “roof side member”, and the reinforcing plate member 1a of the front pillar 1 corresponds to a “reinforcing plate member”. The friction point joint 25 corresponds to “first joint” and “spot joint”, and the rivet joints 35a to 35e correspond to “second joint”.

Next, in the joining method and joining structure of the vehicle bodies described above, the operation and effect of the joining method and joining structure of the flange portion 7a of the roof panel 7 and the flange portion 4a of the front header 4 will be described.
In the first step, the flange portion 7a forming the window glass bonding surface 7b of the roof panel 7 made of aluminum alloy is overlapped with the upper plate, and the flange portion 4a of the front header 4 made of aluminum alloy is overlapped with the lower plate. The rotary tool 14 of the friction point welding device 9 is pressed against the joint portion of the flange portion 4a of the front header 4 while rotating. By the frictional heat generated when the rotary tool 14 presses the front header 4, the joint portion of the flange portion 4 a of the front header 4 softens and plastically flows, and the joint portion of the flange portion 4 a of the front header 4 and the roof panel 7. The joint portion of the flange portion 7a is subjected to friction point joining in a solid state at a temperature equal to or lower than the melting point.

  In the next second step, a joint portion near both ends of the flange portion 7a of the roof panel 7, a joint portion near both ends of the flange portion 4a of the front header 4, and a joint portion of the reinforcing plate member 1a of the front pillar 1 are formed. The three self-piercing rivets 36 are driven by riveting with a rivet driving gun of a rivet fastening device from the roof panel side (outside of the passenger compartment), and the joints are riveted.

  In this way, in the first step, the flange portion 4a of the front header 4 is pressed while rotating the rotary tool 14 from the vehicle interior side, and the joint portion of the flange portion 7a of the roof panel 7 and the flange portion 4a of the front header 4 are pressed. Since the joining portion is subjected to friction point joining, the burr 24 is not generated on the window glass bonding surface 7b of the flange portion 7a of the roof panel 7. Therefore, the window glass bonding surface 7b of the flange portion 7a of the roof panel 7 can be formed on a flat surface. Thereby, window glass adhesion | attachment can be performed easily and stably with respect to the window glass adhesion surface 7b.

  Moreover, since the joint part which joined the flange part 7a of the roof panel 7 and the flange part 4a of the front header 4 is the friction point junction part 25 formed in multiple places in the vehicle width direction, the flange part 7a of the roof panel 7 and It is not necessary to use a rivet for joining the front header 4 flange portion 4a, the flange portions 4a and 7a can be joined easily, and the joining cost including the material cost can be reduced. .

  Further, in the second step, since rivet joining is performed mechanically, it is possible to surely secure the joining strength between both ends of the flange portion 7a of the roof panel 7 and the flange portion 4a of the front header 4, and the embedding is performed. With the rivet 36 of the mold, the glass bonding surface 7b of the flange portion 7a of the roof panel 7 can be formed on a flat surface. Furthermore, the number of rivet joints 35a to 35e by mechanical joining can be reduced, and the joining cost including the material cost for the rivet joints 35a to 35e can be reduced.

  Next, a vehicle body joining method and a joining structure according to the second embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the member similar to the joining method and joining structure of the said Example 1 among this joining method and joining structure, and description is abbreviate | omitted.

The vehicle body joining method according to the second embodiment is performed by the rivet joint fastening device using the friction point joining device 9 and the embedded self-piercing rivet 36 similar to those in the first embodiment, and is assembled with the joining method of the first embodiment. The process and a part of the joining structure are different.
In this joining method, first, in the assembly process, the front header 4 made of aluminum alloy is friction-point joined to the reinforcing plate member 1a of the front pillar 1, and a plurality of steel reinforcing plate members 8a to 8d and a steel rear header. 5 is previously joined to the vehicle body structure M by electric resistance spot welding.

  That is, as shown in FIGS. 14 and 15, by using the friction point joining device 9, the rotary tool 14 is pushed into only the both end portions of the front header 4 while being pushed in, and the material is plastically flowed to cause the front header 4 to move. Near-end portions are joined to the reinforcing plate members 1a of the pair of left and right front pillars 1 by a plurality of friction point joining portions 25a, and further, both end portions of the plurality of reinforcing plate members 8a to 8d are a plurality of spot welded portions 30a to 30a. The rear header 5 is joined to the reinforcing plate member of the rear pillar 3 at a plurality of spot joints at 33a. FIG. 15 is a plan view of the main part of the vehicle body structure M of the automobile shown with the roof panel 7 omitted.

  Next, in the first step, the roof panel 7 is attached to the vehicle body structure in which the various members are joined. That is, as shown in FIG. 15, the flange portion 7 a of the roof panel 7 is joined to the flange portion 4 a of the front header 4 by the plurality of friction point joining portions 25, and the left and right ends of the roof panel 7 are joined to the plurality of friction point joining portions 29. The roof panel 7 is joined to the roof side rail 6, and the rear end portion of the roof panel 7 is joined to the flange portion 5 a of the rear header 5 by a plurality of friction point joining portions 27.

  In the first step, the rotary tool 14 is pressed against the flange portion 4a of the front header 4 while rotating from the inside of the vehicle body. The joint of the flange 4a of the front header 4 softens and plastically flows due to frictional heat generated when the rotary tool 14 comes into contact with the flange 4a of the front header 4, and the joint of the flange 4a of the front header 4 flows. Thus, a friction spot joint 25 is formed by friction spot welding of the joint of the flange portion 7a of the roof panel 7 in a solid state. In addition, during joining by the rotary tool 14, the aluminum alloy that has flowed and protruded to the outer peripheral vicinity surface of the body portion 14a of the rotary tool 14 on the lower surface of the flange portion 4a of the front header 4 is hardened in a burr shape. On the other hand, the window glass bonding surface 7b of the flange portion 7a of the roof panel 7 remains a flat surface.

  As shown in FIG. 16, the friction point joint portion 25 formed by the friction point joint as described above has a friction point between the joint portion of the flange portion 4 a of the front header 4 and the joint portion of the flange portion 7 a of the roof panel 7. It joins and it becomes the structure which makes the window glass adhesion surface 7b of the flange part 7a of the roof panel 7 a flat surface. And the front end side friction joining area | region 26 in which this friction point joining part 25 was formed in multiple places at predetermined intervals along the vehicle width direction of the flange part 7a of the roof panel 7 and the flange part 4a of the front header 4 is formed. The

  The right friction joint region 34A in which a plurality of friction joints 29 are formed in the longitudinal direction of the vehicle body by joining the joints on both ends of the roof panel 7 and the joints of the roof side rails 6 by the same friction spot joining as described above. Left end friction joining region 34B, rear end friction joining region 28 in which a plurality of friction point joining portions 27 in the joining portion of the rear end portion of roof panel 7 and the joining portion of flange portion 5a of rear header 5 are formed in the vehicle width direction. And are formed.

  Next, after joining by friction spot joining in the first step, in the second step, in the joining region between the front end side friction joining region 26 and the left end side friction joining region 34B, as shown in FIG. 7 at the both ends of the flange portion 7a and the flange portion 4a of the front header 4 at the rivet joint portion 35a at the vehicle interior side of the roof panel 7 and the front header 4, the reinforcing plate member 1a of the front pillar 1 is provided. Are mechanically joined to each other using an embedded self-piercing rivet 36.

  As shown in FIG. 15, in this second step, a plurality of (three points) rivet joints 35a to 35c are formed in the joining region between the front end side friction joining region 26 and the right friction joining region 34A. . That is, the flange portion 7a of the roof panel 7 and the front end portion of the roof side rail 6 are joined to the reinforcing plate member 1a of the front pillar 1 by the rivet joint portion 35a, and the flange portion 7a of the roof panel 7 is fronted by the rivet joint portion 35b. The reinforcing plate member 1a of the pillar 1 is joined, and the flange portion 7a of the roof panel 7 and the flange portion 4a of the front header 4 are joined to the reinforcing plate member 1a of the front pillar 1 by the rivet joint portion 35c. The same applies to the rivet joints 35a to 35c at a plurality of points formed between the joining regions between the front end side joining region 26 and the left end side friction joining region 34B.

  Of the rivet joints 35a to 35c mechanically joined as described above, as shown in FIG. 17, the flange 7a of the roof panel 7, the flange 4a of the front header 4, and the reinforcing plate member of the front pillar 1 In the rivet joint part 35c in which three la and 1a are stacked, the head of the embedded self-piercing rivet 36 is driven to a state where it is not exposed from the window glass bonding surface 7b of the flange part 7a of the roof panel 7, and the window glass bonding surface 7b is a flat surface.

  Further, both ends of the roof panel 7 are formed in the joining region between the right end side joining region 34A and the rear end side friction joining region 28 and in the joining region between the left end side friction joining region 34B and the rear end side joining region 28. The joints in the vicinity are joined to the joints in the vicinity of both ends of the rear header 5 and the hinge reinforcing plate member and the corner reinforcing plate member of the back door by a plurality of rivet joints 37 and 38.

  The roof side rail 6 corresponds to a “roof side member”, and the reinforcing plate member 1a of the front pillar 1 corresponds to a “reinforcing plate member”. The friction point joint 25 corresponds to “first joint” and “spot joint”, and the rivet joints 35a to 35c correspond to “second joint”.

In the vehicle body joining method and the joining structure described above, in particular, the joining method and the function and effect of the flange portion 7a of the roof panel 7 and the flange portion 4a of the front header 4 will be described.
In this vehicle body joining method, in the assembly process, the vicinity of both ends of the front header 4 is joined to the reinforcing member 1a of the front pillar 1 by the friction point joining portion 25a, and both ends of the both end portions 8a to 8d of the plurality of reinforcing plate members. The parts are joined to the roof side rail 6 by spot welded parts 30a to 33a, and the vicinity of both ends of the rear header 5 are joined to the reinforcing plate member of the rear pillar by spot welded parts.

Next, the roof panel 7 is attached to the vehicle body structure M in which the above-described members are joined.
In the first step, the joint portion of the flange portion 7a of the roof panel 7 is pressed while rotating the rotary tool 14 from the vehicle interior side. By the frictional heat generated when the rotary tool 14 is pressed against the front header 4, the joint portion of the flange portion 4 a of the front header 4 softens and plastically flows, and the joint portion of the flange portion 4 a of the front header 4 and the roof panel 7. The joint portion of the flange portion 7a is subjected to friction point joining in a solid state at a temperature equal to or lower than the melting point.

  Next, in the second step, a joint portion near both ends of the flange portion 7a of the roof panel 7, a joint portion near both ends of the flange portion 4a of the front header 4, and a joint portion of the reinforcing plate member 1a of the front pillar 1 The three self-piercing rivets 36 are driven by a rivet driving gun of a rivet fastening device from the roof panel side (outside of the passenger compartment) to rivet the joints.

  In this way, in the first step, the flange portion 4a of the front header 4 is pressed while rotating the rotary tool 14 from the vehicle interior side, and the flange portion 7a of the roof panel 7 and the flange portion 4a of the front header 4 are friction point joined. Therefore, the burr 24 does not occur on the window glass bonding surface 7b of the flange portion 7a of the roof panel 7. Therefore, the window glass bonding surface 7b of the flange portion 7a of the roof panel 7 can be formed on a flat surface. Thereby, as shown in FIGS. 12 and 13, it is possible to easily and stably perform window glass bonding on the window glass bonding surface 7b.

  Moreover, since the joint part which joined the flange part 7a of the roof panel 7 and the flange part 4a of the front header 4 is the friction point junction part 25 formed in multiple places in the vehicle width direction, the flange part 7a of the roof panel 7 and It is not necessary to use a rivet for joining the front header 4 flange portion 4a, the flange portions 4a and 7a can be joined easily, and the joining cost including the material cost can be reduced. .

  Further, in the second step, since rivet joining is performed mechanically, it is possible to surely secure the joining strength between both ends of the flange portion 7a of the roof panel 7 and the flange portion 4a of the front header 4, and the embedding is performed. With the rivet 36 of the mold, the glass bonding surface 7b of the flange portion 7a of the roof panel 7 can be formed on a flat surface. Furthermore, the number of rivet joints 35a to 35e by mechanical joining can be reduced, and the joining cost including the material cost for the rivet joints 35a to 35c can be reduced.

Next, a modified example in which the first and second embodiments are partially modified will be described.
1] In the first and second embodiments, the example in which the joining method of the present invention is applied to the body structure of a wagon-type automobile has been described. However, the joining of the present invention is also applied to the body structure of a sedan-type automobile. The method can be applied.

2] In the first and second embodiments, the technique of joining the roof panel 7 made of aluminum alloy and the front header 4 made of aluminum alloy to the vehicle body structure has been described as an example. However, the roof panel and the front header are made of aluminum. The invention can be similarly applied to a light metal such as a product made of light metal, and is not limited to a light metal product.

3] The shape of the rotary tool 14 of the friction point welding device 9 of the first and second embodiments is not limited to that shown in FIG. 5, but the shoulder portion 14b of the rotary tool 14 is an inclined surface that is recessed toward the pin portion 14c. What was formed can also be used.

4] The joints of the first and second embodiments are not limited to the frictional spot joints. For example, the rotary tool 14 is rotated along the overlapping surface of the plate material to connect the overlapped portion of the plate material. A plurality of joint portions that are solid-phase bonded may be formed.

5] In addition, those skilled in the art can implement the present invention by adding various modifications to Embodiments 1 and 2 without departing from the spirit of the present invention, and the present invention includes such modifications. Is.

It is a disassembled perspective view of the vehicle body structure, roof panel, and reinforcing plate member of Example 1 of the present invention. It is a principal part top view of the vehicle body structure shown except the roof panel. It is a side view of a friction point joining apparatus. It is a principal part enlarged side view of the periphery of the joining gun of a friction point joining apparatus. It is a principal part fragmentary sectional view of a rotation tool. It is an expanded sectional view of the joining object location which carries out friction spot welding with a rotation tool. It is an expanded sectional view of the joined part which carried out the friction spot joining with the rotation tool. It is sectional drawing after the completion of joining which carried out the friction spot joining with the rotary tool. It is an expanded sectional view of rivet joining. FIG. 3 is a sectional view taken along line XX in FIG. 2. It is the XI-XI sectional view taken on the line of FIG. It is a longitudinal cross-sectional view which shows the state before adhesion | attachment of a window glass and a vehicle body. It is a longitudinal cross-sectional view which shows the adhesion structure of a window glass and a vehicle body. It is a disassembled perspective view of the vehicle body structure and roof panel of Example 2 of this invention. It is a principal part top view of the vehicle body structure shown except the roof panel. It is the XVI-XVI sectional view taken on the line of FIG. It is the XVII-XVII sectional view taken on the line of FIG.

Explanation of symbols

A Plastic flow part 1a Front pillar reinforcing plate member 4 Front header 4a Flange part 5 Rear header 6 Roof side rail 7 Roof panel 7a Flange part 7b Wind glass adhesive surface 14 Rotating tool 25 Friction point joint parts 35a to 35e Rivet joint part 36 Recessed rivet

Claims (14)

In the joining method of the vehicle body which joined the metal roof panel and the metal header,
The flange portion forming the window glass bonding surface of the roof panel and the flange portion of the header are overlapped, and the friction tool is generated by pressing against the flange portion of the header while rotating the rotary tool from the vehicle interior side, and at least the flange of the header A joining method for a vehicle body characterized by forming a joined portion in which a flange portion of a roof panel and a flange portion of a header are joined by softening the portion to cause plastic flow.   2. The method for joining vehicle bodies according to claim 1, wherein the joint portion obtained by joining the flange portion of the roof panel and the flange portion of the header is a spot joint portion formed at a plurality of locations in the vehicle width direction.   The vehicle body joining method according to claim 1, wherein the roof panel and the header are members made of an aluminum alloy. In the vehicle body joining method in which the metal roof panel, the metal header, and the metal roof side member are joined,
The flange portion that forms the window glass bonding surface of the roof panel is overlapped with the flange portion of the header portion, and the friction tool is generated by pressing against the flange portion of the header while rotating the rotary tool from the vehicle interior side, and at least the header A first step of softening the flange portion to cause plastic flow to form a first joint portion joining the flange portion of the roof panel and the flange portion of the header;
Next, a vehicle body joining method including a second step of forming a second joint portion in which the roof panel and the header are joined to a roof side member.   5. The vehicle body joining method according to claim 4, wherein the first joint portion that joins the flange portion of the roof panel and the flange portion of the header is a spot joint portion formed in a plurality of locations in the vehicle width direction.   The vehicle body joining method according to claim 4 or 5, wherein the roof panel and the header are aluminum alloy members, and the roof side member is a steel member.   The roof side member includes a reinforcing plate member disposed closer to the vehicle interior side than the roof panel and the header, and the second step of joining the roof panel and the header to the roof side member reinforces the roof panel and the header. The vehicle body joining method according to claim 6, further comprising a joining step of mechanically joining the plate member with an embedded rivet. In the joint structure of the car body where the metal roof panel and the metal header are joined,
The flange portion forming the window glass bonding surface of the roof panel and the flange portion of the header are overlapped, and the friction tool is generated by pressing against the flange portion of the header while rotating the rotary tool from the vehicle interior side, and at least the flange of the header A joint structure for a vehicle body comprising a joint portion in which a flange portion of a roof panel and a flange portion of a header are joined by softening a portion to cause plastic flow.   9. The joint structure for vehicle bodies according to claim 8, wherein the joint portion obtained by joining the flange portion of the roof panel and the flange portion of the header is a spot joint portion formed at a plurality of locations in the vehicle width direction.   The vehicle body joining structure according to claim 8 or 9, wherein the roof panel and the header are members made of an aluminum alloy. In the joint structure of the vehicle body in which the metal roof panel, the metal header, and the metal roof side member are joined,
The flange portion forming the window glass bonding surface of the roof panel and the flange portion of the header are overlapped, and the friction tool is generated by pressing against the flange portion of the header while rotating the rotary tool from the vehicle interior side, and at least the flange of the header A first joint part that softens the part and causes plastic flow to join the flange part of the roof panel and the flange part of the header;
A vehicle body joining structure comprising: a second joining portion in which the roof panel and the header are joined to a roof side member.   The vehicle body joint structure according to claim 11, wherein the first joint portion is a spot joint portion formed at a plurality of locations in a vehicle width direction.   The vehicle body joint structure according to claim 12, wherein the roof panel and the header are members made of an aluminum alloy, and the roof side member is a member made of steel.   The roof side member includes a reinforcing plate member disposed on the vehicle interior side of the roof panel and the header, and the second joint portion mechanically joins the roof panel and the header to the reinforcing plate member with an embedded rivet. The vehicle body joint structure according to claim 13, wherein the joint structure is a rivet joint portion.