JP2008215367A - Joint structure of vehicle body plate material for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance joint strength by an adhesive in a joint part, and to enhance joint quality by the adhesive in structure wherein two vehicle body plate materials for a vehicle are welded after bonding them by the adhesive. <P>SOLUTION: In the structure wherein a front side frame 2 and a floor panel 4 are spot-welded 8 after bonding and jointing them by the adhesive, edge parts E1 and E2 on an alignment direction end surface of a welding spot P are formed in a round shape having a radius centered on the spot P. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, the joint surfaces of two vehicle body plate members are adhesively bonded to each other with an adhesive, and then a plurality of portions of the joint surfaces are spaced and joined by pressure-bonding means such as welding and rivets. The present invention relates to a joining structure for vehicle body plate materials.

  Conventionally, in order to join two body plate members constituting an automobile body, in order to increase the joint strength, the two body plate members are bonded and bonded together with an adhesive in advance, and then they are welded, added with rivets or the like. There is already known a technical means in which pressure bonding is performed by a pressure bonding means.

  However, in the conventional technical means, as shown in FIG. 6, when two body plate members (for example, a front side frame and a floor panel) are bonded and bonded together by pressure and pressure bonding, the adhesive is bonded to the two vehicle body plate members. It is difficult to spread to the edge part, the rigidity and strength of the adhesive part are reduced, and a gap is formed in the adhesive surface of the corner part of the edge part, and the electrodeposition paint is peeled off. In the case of using different metal plates such as an iron plate and an aluminum plate, there is an inconvenience that galvanic corrosion occurs due to their direct contact. Therefore, if the amount of the adhesive is increased in order to eliminate such inconvenience, the adhesive may protrude from between the vehicle body plate materials, and the protruding adhesive will enter into the recesses of the rivet driving die and adversely affect the bonding quality. There was a harmful effect of giving.

Therefore, in the one disclosed in Patent Document 1 described later, two types of adhesives are used in a joint portion for joining vehicle body plate members made of different kinds of metal plates, that is, adhesives in an area to be pressed with rivets are used in other areas. There has already been proposed a technical means which uses an adhesive having a relatively lower fluidity than the adhesive disposed in the above-mentioned to eliminate the above-mentioned adverse effects.
JP 2005-155671 A

  However, in the one disclosed in Patent Document 1, since two types of adhesives are used, the operation of applying the adhesive is complicated, and not only the cost is increased, but the adhesive is evenly distributed over the entire joining surface. There is a problem that it is difficult to spread.

  The present invention has been made in view of such a situation, and in the joint structure of two vehicle body plate materials, which uses both adhesive bonding by an adhesive and pressure-bonding bonding such as rivets and welding, the adhesive strength by the adhesive is increased. It aims at improving and joining quality by an adhesive agent while improving.

In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that after joining the joint surfaces of the two body plate materials with an adhesive, a plurality of locations of the joint surfaces are spaced apart, and welding, rivets, etc. In the joining structure of the vehicle body plate material of the vehicle formed by pressure bonding by the pressure pressure bonding means,
The feature is that the shape of the edge portion of the joining surface of one of the body plate members at the end face in the arrangement direction of the crimping joint hit points is formed into a rounded shape having a radius centering on the crimping joint hitting point.

  In order to achieve the above object, the invention described in claim 1 is the one described in claim 1, wherein at least one of the two body plate members includes a bottom plate portion and a vertical wall portion standing up from both sides of the bottom plate portion, A flange portion extending laterally outwardly from the upper edge of the vertical wall portion is formed in a cross-sectional channel shape, and the flange portion has a joint surface with the other body plate material, and the joint surface is The edge part on the connection side with the wall part and the edge part on the free end side are both formed in the rounded shape.

  According to the invention described in the claims, in the case where two vehicle body plate members are bonded and bonded by an adhesive, and then pressure-bonded by welding, rivets or the like, the adhesive is evenly distributed on the bonding surface. In addition, the rigidity and strength of the bonded portion can be secured, and in particular, when the two vehicle body plate materials are made of different materials, their electrolytic corrosion can be prevented.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below based on examples of the present invention shown in the accompanying drawings.

  The following embodiment is a case where the joining structure of the two body plate members of the vehicle of the present invention is implemented in the joining structure of the front side frame and the floor panel of the automobile body. FIG. FIG. 2 is an enlarged cross-sectional view taken along line 2-2 of FIG. 1, FIG. 3 is an enlarged view of arrow 3 in FIG. 1, and FIG. 4 is an enlarged view of arrow 4 in FIG. FIG. 5 is a diagram illustrating a molding process of the front side frame.

  In FIG. 1, a pair of left and right floor frames 1, 1 that run longitudinally in the front-rear direction are provided in parallel with each other at the lower part of a vehicle body B of the automobile. The rear portions of the front side frames 2 and 2 are joined together. The pair of left and right front side frames 2 and 2 extend through the dashboard 3 that divides the vehicle compartment from the engine room and extend downward from the engine room, and their front parts are coupled to the lower cross member of the bulkhead (not shown). Has been. In the passenger compartment, the floor panel 4 is integrally joined to the upper surfaces of the pair of left and right floor frames 1, 1 and the front side frames 2, 2 via joining means described later. A floor tunnel stiffener 5 having a convex cross section is integrally raised at the center of the left and right sides of the floor panel 4, and this floor tunnel stiffener 5 extends through the dashboard 3 to the lower part of the engine room. .

  As shown in FIGS. 2 and 3, the left and right front side frames 2, 2 constituting one of the two body plate members are integrally joined to the front portions of the left and right floor frames 1, 1. Each front side frame 2 is formed in substantially the same shape as the floor frame 1, and as shown in FIGS. 2 and 3, rises from a bottom wall portion 2a extending substantially horizontally and from the left and right sides of the bottom wall portion 2a. Left and right vertical wall portions 2b and 2b, left and right flange portions 2c and 2c extending outward from the upper edges of these vertical wall portions 2b and 2b, and bent ends bent downward from the left and right flange portions 2c and 2c It has 2d and 2d and is formed in a cross-sectional channel shape. The upper surfaces of the left and right flange portions 2c, 2c are joint surfaces with the floor panel 4 constituting another vehicle body plate material.

  The front side frame 2 is made of a light alloy plate in order to reduce the weight of the vehicle body B. In this embodiment, the front side frame 2 is made of an aluminum alloy plate, and the upper surface of the flange portions 2c and 2c at the left and right upper edges is made of a steel plate. The floor panels 4 are joined together by the joining means according to the present invention. That is, as shown in FIGS. 3 and 4, a thermosetting adhesive 7 is applied to the upper surfaces of the flange portions 2c and 2c, and the floor panel 4 is adhesively bonded thereon. Thereafter, the bonded portion between the flange portions 2c, 2c of the front side frame 2 and the floor panel 4 is pressure-bonded with a predetermined distance along the longitudinal direction of the flange portions 2c, 2c. It is welded 8.

  By the way, in the thing of this Example, the flange part 2c so that the adhesive agent 7 may spread over the upper surface of the flange parts 2c and 2c of the front side frame 2 evenly to the whole area, especially the edge part. , 2c, the edge portion of the end surface in the arrangement direction of the spot P of the spot weld 7 is processed into a special shape. That is, as clearly shown in FIG. 4, the edge portion E1 of the end surface of the flange portion 2c of the front side frame 2 on the connection side with the vertical wall portion 2b has a radius centered on the spot welding hit point P. Similarly, the edge portion E2 of the end surface on the free end side of the flange portion 2c is also formed in a round shape with a radius R centered on the spot welding hit point P. The length of the radius R is: It is about ½ of the width of the flange portion 2c. As described above, by forming the edge portions E1 and E2 of the flange portion 2c into the rounded shape, after the adhesive 7 is applied, the adhesive 7 is subjected to the press-bonding by the spot welding 8 and the spot welding spot. It spreads in a circle around P and can be evenly filled up to the edge portions E1 and E2 of the end surface of the flange portion 2c.

  The amount of adhesive is set so that a small amount of the adhesive 7 protrudes from the edge portions E1 and E2, so that the edge portions E1 and E2 can be protected by the adhesive 7, and the front side frame 2 and the floor can be protected. Direct contact between the panels 4 can be avoided, and the occurrence of galvanic rust can be prevented.

  As shown in FIGS. 5 (a) to 5 (c), the front side frame 2, which is one of the body plate members, is made from a square blank material made of an aluminum alloy material through draw molding and trim molding. The round shape of the edge portion E1 on the connection side with the vertical wall portion 2b of the end surface of the portion 2c is formed in the draw molding process, and the round shape of the edge portion E2 on the free end side of the end surface of the flange portion 2c is formed in the trim molding process. Molded.

  Further, as shown in FIG. 2, the front side frame 1 is formed with a bent end 2d on the outer edge of the flange 2c, so that when the dust sealer 10 is applied thereto, the holding force of the dust sealer 10 is increased. Thus, durability against rust can be enhanced.

  As described above, according to this embodiment, the edge portions E1 on the connection side with the vertical wall portion 2c and the free end side end surfaces of the spot welding hit points P of the flange portion 2c of the front side frame 2 are arranged. Since E is formed in a rounded shape with a radius R centering on the spot P of the spot weld 8, the adhesive 7 is evenly distributed to the edge portions E1 and E2 of the flange portion 2c when the spot weld 8 is pressure-bonded. It can be filled, the rigidity and strength of the bonded joint portion by the adhesive 7 can be secured, the edge portion of the joint portion can be reliably protected, and the occurrence of rust due to electrolytic corrosion can be prevented.

  As mentioned above, although the Example of this invention was described, this invention is not limited to the Example, A various Example is possible within the scope of the present invention.

  For example, in this embodiment, the case where the joining structure of the vehicle body plate material of the present invention is implemented in the joining structure of the front side frame 2 and the floor panel 4 has been described. In this embodiment, the case where spot welding is used as pressure bonding is described, but instead of this, other pressure bonding such as a self-piercing rivet is described. May be used.

Partial perspective view of a partially broken car body Enlarged cross-sectional view along line 2-2 in FIG. 1 enlarged view of FIG. 4 is an enlarged view taken along the arrow 4 in FIG. Diagram showing the molding process of the front side frame Partially broken perspective view of the joint of two conventional body plate materials

Explanation of symbols

2 .... Body plate material (front side frame)
2a ......... Bottom wall part 2b ......... Vertical wall part 2c ......... Flange part 4 .......... Car body plate (floor panel) )
7 ········· Adhesive 8 ········· Pressure and pressure contact means (spot welding)
E1, E2 ... Edge part P ... Crimp joint spot (spot weld spot)

Claims (2)

After the bonding surfaces of the two vehicle body plate members (2, 4) are bonded and bonded together with an adhesive (7), a plurality of portions of the bonding surfaces are spaced apart, and a pressure-bonding bonding means such as welding or rivet (8 ) In the joining structure of the vehicle body plate material,
The shape of the edge part (E1, E2) of the end surface in the arrangement direction of the pressure bonding bonding point (P) of the bonding surface of one of the body plate members (2) is changed to a rounded shape having a radius centered on the pressure bonding bonding point (P). A joint structure for a vehicle body plate material, characterized by being formed.   At least one (2) of the two vehicle body plate members (2, 4) includes a bottom plate portion (2a), a vertical wall portion (2b) rising from both sides of the bottom plate portion (2a), and the vertical wall portion (2b). A flange portion (2c) extending laterally outward from the upper edge is formed in a cross-sectional channel shape, and the flange portion (2c) has a joint surface with the other vehicle body plate (4), The joining surface is characterized in that both the edge portion (E1) on the connection side with the vertical wall portion (2b) and the edge portion (E2) on the free end side are formed in the rounded shape. Bonding structure for vehicle body plate material.

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