JP4605595B2 - Sheet metal joint structure of car body - Google Patents

Description

  The present invention relates to a sheet-metal joining structure for a vehicle body that can accurately meet rigidity requirements and weight reduction.

  In general, a sheet metal part of a vehicle body used in a vehicle such as an automobile is processed into a desired shape by press molding or the like. A plurality of these sheet metal parts are combined and joined by spot welding or the like in order to obtain a predetermined rigidity required for the vehicle body.

  As a result, the plurality of sheet metal parts that are integrally joined together constitute, for example, a front pillar, a side rail, a center pillar, a side sill, and the like of the vehicle body. The front pillar, center pillar, side sill, and the like have different required rigidity depending on the part to be used, and the number of sheet metal parts to be combined is changed.

  By the way, for example, when a total of four or more sheet metal parts are spot welded at a time, it may be difficult to ensure the pressure and current density, and sufficient joint strength may not be obtained.

Therefore, for example, in Patent Document 1, in a vehicle body side structure composed of four sheet metal parts, in order to set the number of overlapping flanges at the joint portion of each sheet metal part to 3 or less, the flange is appropriately cut. A technique for forming a notch is described.
JP 2001-328560 A

  However, as in the technique disclosed in Patent Document 1, when a notch is provided in one of the flanges of the four sheet metal parts and the three flanges are spot-welded and joined, the notches are formed in the flange. The part provided with is partly not joined, and the rigidity of each part is partially reduced.

  Therefore, for example, when the above-mentioned technique is applied to a vehicle body skeleton member that requires particularly high rigidity, such as a front pillar, side rail, center pillar, side sill, etc., in order not to lower rigidity partially. Therefore, it is necessary to secure a sufficient thickness of each sheet metal part, which is a cause of hindering weight reduction.

  Further, when the technique of the above-mentioned Patent Document 1 is used, there is a problem that stagnation occurs in a portion where the flange is not joined, each sheet metal part is rubbed to generate a squeaking sound, and each sheet metal part is distorted. is there. Note that, even in a joining structure by spot welding of three sheet metal parts or five or more sheet metal parts, a notch may be provided in the wrapping flange, but also in this structure, the rigidity of the above-described joining portion is reduced. There is a problem that sag and distortion occur in each sheet metal part.

  Accordingly, the present invention has been made in view of the above circumstances, and provides a sheet metal bonding structure for a vehicle body that can accurately meet the rigidity requirements and weight reduction of a vehicle body such as an automobile formed by bonding a plurality of sheet metal parts. The purpose is to provide.

To achieve the above object, sheet metal junction structure of the present invention is a vehicle body sheet metal junction structure sheet metal parts of a plurality are joined, respectively, provided with a flange edge portion, the flange is welded Two main panels and two reinforcing panels interposed between the two panels , the edge of the one reinforcing panel corresponding to the weld between the flanges of the main panel forming a flange that extends between said flange edge portion, the flange is joined to the main panel and integrally by the weld to form the engaging stepped portion at the base of the flange of one main panel described above, The contact portion formed on the edge portion of the other reinforcing panel is engaged with the engaging step portion, and both surfaces of the contact portion are fixed to the one main panel and the one reinforcing panel with an adhesive. With the characteristics That.

  ADVANTAGE OF THE INVENTION According to this invention, the sheet-metal joining structure of a vehicle body which can respond | correspond exactly to the rigidity request | requirement and weight reduction of vehicle bodies, such as a motor vehicle formed by joining several sheet-metal components, is realizable.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 relate to an embodiment of the present invention, FIG. 1 is an overall perspective view for explaining an outline of a body shell, and FIG. 2 is a sectional view of a side sill taken along line II-II in FIG. 3 is an explanatory view showing an example of the joint shape at the side portion of the side sill, FIG. 4 is an exploded perspective view showing an example of the joint shape at the side portion of the side sill in FIG. 3, and FIG. 5 is a deformation of the joint shape at the side portion of the side sill. FIG. 6 is an exploded perspective view showing a modified example of the joint shape at the side portion of the side sill of FIG.

In FIG. 1, a vehicle body shell 1 has side rails 3 whose side surfaces fix a roof panel 2. From the side rail 3, a front pillar 4 at the front of the vehicle body, a center pillar 5 at the center of the vehicle body, and a rear pillar 6 at the rear of the vehicle body are extended downward, and these are connected to a side sill 7 at the bottom of the vehicle body.
The side rail 3, front pillar 4, center pillar 5, rear pillar 6 and side sill 7 are constituted by a plurality of sheet metal parts such as an outer panel and an inner panel.

  In the present embodiment, a sheet metal joining structure for a vehicle body composed of a plurality of sheet metal parts according to the present invention will be described by taking the structure of the side sill 7 of the body shell 1 shown in FIG. 1 as an example. The sheet metal joining structure for a vehicle body according to the present invention can be applied to any of the side rail 3, the front pillar 4, the center pillar 5, and the rear pillar 6 described above.

  As shown in FIGS. 2 to 4, the side sill 7 showing the sheet metal joining structure of the vehicle body of the present invention includes an outer panel 11, which is a first main panel disposed outside the vehicle, and a vehicle. An inner panel 12 that is a second main panel disposed on the chamber side, a first reinforcement 13 that is a first reinforcement panel, and a second reinforcement 14 that is a second reinforcement panel; It has four sheet metal parts made of metal sheets.

  In the present embodiment, the outer panel 11 and the inner panel 12 are sheet metal parts each having flanges 11a and 12a at the edge portions and processed by press forming or the like into a bowl shape having a substantially hat shape in cross section. Further, the inner panel 12 is formed with an engaging step portion 12b that protrudes outward by the plate thickness of the second reinforcement 14, that is, toward the passenger compartment, along the base portion of each flange 12a. .

  Like the outer panel 11 and the inner panel 12, the first reinforcement 13 has a flange 13a that is an extended portion extending from the edge portion, and is pressed into a bowl shape having a substantially hat-shaped cross section. It is a sheet metal part processed by forming or the like. The first reinforcement 13 has a shape that can be accommodated in the inner panel 12.

  As shown in FIG. 4, in the present embodiment, the flange 13a of the first reinforcement 13 is notched in a rectangular shape at regular intervals, and the first reinforcement exposed to the flange 13a by this notch. The end portion of the ment 13 is formed as a contact portion 13b portion that partially contacts the outer panel 11 in the vicinity of the base portion of the flange 11a. That is, the first reinforcement 13 alternately has a plurality of flanges 13a on both edge portions and a plurality of contact portions 13b formed between the plurality of flanges 13a.

  On the other hand, the second reinforcement 14 has a substantially flat plate shape, and unevenness (not shown) processed by press forming or the like is formed on the plate surface in order to obtain rigidity required according to the body part. It is a sheet metal part having.

  The second reinforcement 14 has a contact portion 14 a that engages with both edge portions corresponding to the respective engagement step portions 12 b of the inner panel 12. In addition, each contact portion 14a has an extension portion 14b that extends in the same shape as the contact portion 13b at a position corresponding to the contact portion 13b formed on the flange 13a of the first reinforcement 13. Is formed. That is, the second reinforcement 14 has alternately a plurality of contact portions 14a and a plurality of extension portions 14b extending from between the contact portions 14a, respectively, on both edge portions.

  The length of the second reinforcement 14 between the contact portions 14a, that is, the length between the end portions of the contact portions 14a connects the engagement step portions 12b provided at both edge portions of the inner panel 12. Is set to approximately the same length. In other words, the second reinforcement 14 has a length between the end portions that are engaged in a state in which the contact portions 14a of both edge portions are fitted in the engagement step portions 12b of the corresponding inner panel 12 respectively. is doing.

  Further, as shown in FIG. 4, each of the plurality of extending portions 14 b described above has an outer side so as to have a step from one surface side of the contact portion 14 a, that is, the outer surface of the first reinforcement 13. It extends in the direction.

  Thereby, each extension part 14b of the 2nd reinforcement 14 is each arrange | positioned by each contact part 13b which is a notch between the corresponding 1st reinforcements 13. FIG.

  Here, in the present embodiment, the first reinforcement 13 and the second reinforcement 14 are set to have substantially the same thickness. Thereby, between each flange 11a and 12a of the outer panel 11 and the inner panel 12, the flange 13a of the 1st reinforcement 13 and the extension part 14b of the 2nd reinforcement 14 generate | occur | produce a level | step difference. It is inserted alternately.

  And between each said flange 11a, 12a, the part in which the flange 13a of the 1st reinforcement 13 or the extension part 14b of the 2nd reinforcement 14 is interposed is a liquid thermosetting epoxy resin type | system | group, etc. The adhesive 15 and a plurality of locations are joined together by a so-called weld bond joining method using spot welding which is resistance welding.

  That is, in the present embodiment, the welded portion 16 of spot welding set between the flange 11a of the outer panel 11 and the flange 12a of the inner panel 12 has a flange 13a of the first reinforcement 13 or a second phosphorus. An extension part 14 b of the force 14 is extended, and these are integrally joined to the flanges 11 a and 12 a by the weld part 16.

  Further, in the present embodiment, the flange 13a of the first reinforcement 13 and the contact portion 14a of the second reinforcement 14 avoid the welds 16 by the adhesive 15 used in the weld bond bonding method. In position, it is fixed to the outer panel 11 or the inner panel 12.

  The outer panel 11, the inner panel 12, and the first reinforcement 13 have the same length between the two flanges 11 a, 12 a, 13 a provided on the respective edge portions. That is, as shown in FIG. 2, the outer panel 11, the inner panel 12, and the first reinforcement 13 include the flanges 11 a, 12 a, 13 a on one edge side and the flanges 11 a, 12 a, 12 a on the other edge side. The lengths between the end portions of the flanges 11a, 12a, and 13a are set to be equal so that 13a can be overlapped correspondingly.

  In the side sill 7 in which the four sheet metal parts configured as described above are integrated, the outer panel 11 and the inner panel 12 are joined so that an internal space is formed. Further, the first reinforcement 13 and the second reinforcement 14 are disposed in a space formed by the outer panel 11 and the inner panel 12.

As described above, instead of the configuration in which the extension portions are arranged at predetermined intervals for each reinforcement 13, 14, for example, as shown in FIGS. Only the series of flanges 13a may be provided in the force 13 and only the series of contact portions 14a may be provided in the second reinforcement 14 in accordance therewith.
The assembly procedure of the side sill 7 which is an example of the sheet metal joint structure of the vehicle body of the present invention configured as described above will be described in detail with reference to FIGS. FIGS. 7 to 9 are explanatory views showing the assembly procedure of the side sill 7 in time series, and FIG. 10 is a graph showing the relationship between the opening displacement of the flange and the load. As shown in FIG. 7, the flange 12a of the inner panel 12 is shown. On the inner surface of the engaging step portion 12b formed on the inner surface, that is, on the surface which becomes the vehicle outer side, the adhesive 15a is applied to a region including at least the engaging step portion 12b. Then, the contact portions 14a on both sides of the second reinforcement 14 are engaged with the engaging step portions 12b of the flange 12a of the corresponding inner panel 12, respectively. At this time, an adhesive may be applied to the entire flange 12a of the inner panel 12.

  Next, the flanges 13 a abut against the corresponding flanges 12 a of the inner panel 12 so that the first reinforcement 13 forms an internal space with the second reinforcement 14 engaged with the inner panel 12. Is done. As a result, as shown in FIG. 8, the contact portions 14 a of the second reinforcement 14 are brought into surface contact with the flanges 12 a and 13 a, that is, sandwiched.

Then, an adhesive portion 15 b is filled in a mating portion between the flange 13 a of the first reinforcement 13 and the contact portion 14 a of the second reinforcement 14. Thereafter, the outer panel 11 extends from the direction in which the first reinforcement 13 is accommodated in the outer panel 11 to the flanges 13a and the second reinforcements 14 of the second reinforcement 13 to which the flanges 11a respectively correspond. It overlaps with the first reinforcement 13 so as to abut the protruding portion 14b.
At this time, an adhesive 15 c is applied between each flange 13 a of the first reinforcement 13 and each flange 11 a of the outer panel 11.

  Accordingly, as shown in FIG. 9, the side sill 7 includes the flange 12 a of the inner panel 12, the flange 13 a of the first reinforcement 13 (or the extending portion 14 b of the second reinforcement 14), and the outer panel 11. A portion in which three sheet metal parts are superimposed in the order of the flange 11a, an engaging step portion 12b of the inner panel 12, a contact portion 14a of the second reinforcement 14, a flange 13a of the first reinforcement 13, and And a portion on which four sheet metal parts are superimposed in the order of the flange 11a of the outer panel 11.

  Then, spot welding is performed at the welds 16 set on the flanges 11a and 12a, so that the flanges 11a and 12a are integrally joined to the flange 13a or the extension 14b. At this time, the contact portion 14 a of the second reinforcement 14 is sandwiched between the engagement step portion 12 b of the inner panel 12 and the flange 13 a of the first reinforcement 13.

  Thereafter, the side sill 7 to which the four sheet metal parts composed of the outer panel 11, the inner panel 12, the first reinforcement 13 and the second reinforcement 14 are joined is bonded to the adhesive 15 (a, b, c). In order to cure, for example, it is subjected to a heating process at 140 ° to 160 ° for about 20 minutes. Thereby, the contact portion 14 a of the second reinforcement 14 is firmly bonded and fixed to the engagement step portion 12 b of the inner panel 12 and the flange 13 a of the first reinforcement 13. Further, the flange 11a of the outer panel 11 and the flange 13a of the first reinforcement 13 are also firmly bonded and fixed.

As described above, the side sill 7, which is an example of the sheet-metal joining structure of the vehicle body of the present invention, uses the second reinforcement 14 as the engagement step portion 12 b of the inner panel 12 and the flange of the first reinforcement 13. By adhering and fixing to 13a, the following effects can be obtained.
That is, the outer panel 11, the inner panel 12, the first reinforcement 13 and the second reinforcement 14 constituting the side sill 7 which is the sheet metal joining structure of the vehicle body of the present invention are partially joined by each joining portion. There are no missing parts.

  Specifically, in the outer panel 11 and the inner panel 12, each flange 11 a, 12 a is provided for each of the welded portions 16 and either the flange 13 a of the first reinforcement 13 or the extended portion 14 b of the second reinforcement 14. Spot welded together. The inner panel 12 is fixed to the contact portion 14a of the second reinforcement 14 integrally with the adhesive 15 at least over the entire engagement step portion 12b. The first reinforcement 13 is fixed to the contact portion 14a of the second reinforcement 14 and the flange 11a of the outer panel 11 by an adhesive 15 at least at the base portion or the entire area on the flange 13a. The

  As a result, the side sill 7 is bonded to the adhesive 15 (a, b) at the portions where the four sheet metal parts including the outer panel 11, the inner panel 12, the first reinforcement 13 and the second reinforcement 14 are in contact with each other. , C) and spot welding together. Therefore, in the side sill 7, since the portions where the sheet metal parts are not joined by the adhesive 15 are eliminated, the rigidity in each welded portion 16 can be improved, and partial stagnation due to rubbing of each sheet metal part may occur. Therefore, it is possible to prevent a stagnation sound and distortion of each sheet metal part. In addition, at least a portion that avoids the welded portion 16, for example, the bonding between the inner surface of the engaging step portion 12 b formed on the flange 12 a of the inner panel 12 and the contact portion 14 a of the second reinforcement 14, The R portion or the vicinity of the R portion and the contact portion 14a of the second reinforcement 14 are joined with an adhesive, and the inner panel and the second reinforcement are not spot-welded without spot welding the second reinforcement. The rigidity of the joint portion of the ment 14 is greatly improved. That is, the present inventors coagulated the adhesive between each flange portion in addition to spot welding, in which each flange portion of the outer panel and the inner panel is joined only by spot welding (hereinafter referred to as sample 1). The joint portion is divided into the one (hereinafter referred to as sample 2) and the one in which the adhesive is solidified between the flange portions and the R portion (hereinafter referred to as sample 3) in addition to spot welding. As a result of an experiment on how the stiffness of each flange portion changes, as shown in FIG. 10, the stiffness of the joint portion of each flange portion is higher in the order of sample 3, sample 2, and sample 1. In FIG. 10, the horizontal axis represents the displacement of each flange, and the vertical axis represents the load required for this displacement. Comparing sample 2 and sample 3, it has been experimentally proven that for the same aperture displacement, sample 3 must be loaded approximately 5 times more. Thus, it has been experimentally confirmed that the rigidity of the joint portion of each flange is dramatically improved by filling the R portion between the members with an adhesive. Therefore, as described above, in the present invention, even if there is a spot that is not partially spot welded, such as the contact portion 14a of the inner panel 12 and the second reinforcement 14, the R portion is included between the members. Thus, the rigidity of the joint can be improved.

  Further, the side sill 7 can reduce the thickness of each of the outer panels 11, the inner panel 12, the first reinforcement 13 and the second reinforcement 14 by improving the rigidity of each joint portion. Thus, the weight can be reduced and the cost can be reduced by improving the yield.

  In addition, in the sheet metal bonding structure of the vehicle body of the present invention in the above-described embodiment, an example in which a weld bond bonding method is employed and the above-described adhesive 15 used in the weld bond bonding method is also used for fixing each contact portion. Although described, the present invention is not limited to this. For example, a part of a portion where the flanges 11a, 12a, 13a and the extending portion 14b contact correspondingly, in particular, each side sill 7, the outer panel 11, You may apply an adhesive only to the base part of each edge part vicinity of the inner panel 12, the 1st reinforcement 13, and the 2nd reinforcement 14. FIG.

  In the present embodiment, as described above, the sheet metal joining structure of the vehicle body for joining four sheet metal parts is shown. However, the present invention can be applied to joining three sheet metal parts or five or more sheet metal parts. is there. Furthermore, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention.

It is a whole perspective view explaining the outline | summary of the body shell based on this Embodiment. It is sectional drawing of the side sill along the II-II line | wire of FIG. 1 which concerns on the sheet-metal joining structure of the vehicle body of this invention. It is explanatory drawing which shows an example of the joining shape in the side part of a side sill. FIG. 4 is an exploded perspective view showing an example of a joint shape at the side portion of the side sill of FIG. 3. It is explanatory drawing which shows the modification of the joining shape in the side part of a side sill. It is a disassembled perspective view which shows the modification of the joining shape in the side part of the side sill of FIG. It is explanatory drawing which shows the assembly procedure of the side sill which concerns on the sheet-metal joining structure of the vehicle body of this invention. It is explanatory drawing which shows the assembly procedure of a side sill same as the above. It is explanatory drawing which shows the assembly procedure of a center pillar equally. It is a graph which shows the relationship between the opening displacement of a flange, and a load.

Explanation of symbols

1 ... Body shell
7 ... side sill
11 ... Outer panel (main panel)
11a ... Flange
12 ... Inner panel (main panel)
12a ... Flange
12b ... engaging step
13 ... 1st reinforcement (reinforcement panel)
13a ... Flange
13b ... contact part
14 ... Second reinforcement (reinforcement panel)
14a ... contact part
14b ... Extension part
15 (15a, 15b, 15c) ... adhesive
16 ... welded part
Agent Patent Attorney Susumu Ito

Claims (1)

A sheet metal joining structure for a vehicle body in which a plurality of sheet metal parts are joined,
Each includes a flange on the edge, two main panels to which the flange is joined by welding, two reinforcing panels interposed between the two panels,
Comprising
Said main panel so as to correspond to the weld between the flange to form a flange that extends between the flange on the edge side portion of the one reinforcing panel described above, joined to the main panel and integrally the flange by the weld And
Forming an engaging step at the base of the flange of the one main panel;
The contact portion formed on the edge portion of the other reinforcing panel is engaged with the engaging step portion, and both surfaces of the contact portion are fixed to the one main panel and the one reinforcing panel with an adhesive. A sheet metal joining structure for a vehicle body characterized by the above.

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