JP4605596B2 - 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.

  Generally, a sheet metal part of a vehicle body used for a vehicle body 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 to each other constitute, for example, a front pillar, a side rail, a center pillar, a side sill, etc., which are vehicle body skeleton parts. 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.

  For example, in the above-described vehicle body skeleton, as a configuration for ensuring rigidity, a reinforcement, which is a reinforcing sheet metal part, is interposed in a space formed by an outer panel and an inner panel, which are two sheet metal parts. Is widely adopted. In such a configuration, the outer panel, the inner panel, and the reinforcement are generally overlapped with flanges formed respectively, and these flanges are joined together by spot welding or the like.

  By the way, for example, when four or more sheet metal parts in total 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 or the like is disclosed.
JP 2001-328560 A

  However, as in the technique disclosed in Patent Document 1, when the flanges of three sheet metal parts are spot-welded and joined at a time, the weldability of the welded portion is reduced depending on the plate thickness of the sheet metal parts. There is.

  In particular, the above-described front pillar, side rail, center pillar, side sill, and the like, which are subjected to a heavy load on the vehicle body, are set to have a large thickness for each panel and reinforcement so that each part can ensure the required rigidity. In many cases, the flanges of these panels and reinforcements are overlapped, and there is a problem that the joining accuracy of the welded part by spot welding is reduced.

  In addition, reinforcement, which is a sheet metal part for reinforcement, is generally formed of a high-strength, high-tensile steel plate (high-tensile material), so that the workability is poor and the cost is increased by forming a flange. This is a cause of yield reduction.

  Accordingly, the present invention has been made in view of the above circumstances, and it is possible to accurately reduce the cost by improving the yield as well as the rigidity requirement, weight reduction and workability improvement of a vehicle body such as an automobile formed by joining a plurality of sheet metal parts. It aims at providing the sheet metal joining structure of the corresponding vehicle body.

In order to achieve the above object, a sheet metal joining structure according to the present invention is a sheet metal joining structure for a vehicle body in which a plurality of sheet metal parts are joined, each of which stands up from both sides and extends outward from the standing up part. a flange issued, Ru and a circular arc bend located between the flange and the upright portion, a first main panel constituting the sheet metal part, a standing portion standing upright respectively from both sides, the A flange extending outward from each of the upright portions, and an arc-shaped bent portion positioned between the flange and the upright portion, and the flange with respect to the flange of the first main panel joined by welding, a second main panel constituting the sheet metal part, and the said upright portion of the first main panel, along one of the above standing portion of the second main panel Comprising a contact portion to touch, the contact portion has been joined by welding to one of the upright portion which contacts said metal plate disposed between the first main panel and said second main panel A reinforcing panel constituting a part, and the end of the contact portion of the reinforcing panel is less in contact with the contact portion than the boundary between the standing portion and the bent portion. The bent portion has an arc shape between the end portion of the contact portion and the bent portion on the side where the contact portion comes into contact with, because the protruding portion is located on the side of the contact standing portion. Thus, the groove is formed, and the groove is filled with an adhesive, so that the adhesive causes the bent portion of the first main panel and the bent portion of the second main panel to , the the end of the contact portion is integrally joined And features.

  According to the present invention, it is possible to realize a sheet metal joint structure for a vehicle body that accurately corresponds to cost reduction by improving yield as well as rigidity requirements, weight reduction and processability of a vehicle body such as an automobile formed by joining a plurality of sheet metal parts. can do.

  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 center pillar taken along line II-II in FIG. 3 is a partially exploded perspective view of the center pillar, FIG. 4 is a perspective view showing a state in which the reinforcement is joined to the outer panel, and FIG. 5 is formed by a bent portion of the outer panel and a standing portion of the reinforcement. FIG. 6 is a perspective view showing a partial appearance of the center pillar. FIG. 6 is a diagram illustrating a state where the groove is filled with an adhesive.

In FIG. 1, 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 extend downward from a side rail 3 that fixes the roof panel 2 to the body shell 1 of the vehicle body. These pillars 4, 5, 6 are connected to a side sill 7 at the bottom of the vehicle body.
The side rail 3, the front pillar 4, the center pillar 5, and the rear pillar 6 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 center pillar 5 of the body shell 1 shown in FIG. 1 as an example. The sheet metal joint structure for a vehicle body according to the present invention can be applied to any of the side rail 3, the front pillar 4, and the rear pillar 6 described above.

As shown in FIGS. 2 and 3, the center pillar 5 showing the sheet metal joining structure of the vehicle body of the present invention is an inner panel 11 that is a first main panel disposed on the vehicle compartment side in the present embodiment. And a sheet metal part of three thin metal sheets comprising an outer panel 12 as a second main panel disposed outside the vehicle and a reinforcement 13 made of a high-tensile steel plate (high-tensile material) as a reinforcing panel. Configured.
In the present embodiment, the inner panel 11 and the outer panel 12 are sheet metal parts that have been subjected to a quenching process after being processed into a bowl shape whose cross-sectional shape forms a substantially hat shape, for example, by press molding or the like. As a result, the inner panel 11 and the outer panel 12 have standing portions 11a and 12a on both sides, and flanges 11b and 12b respectively extending from the edge portions of the standing portions 11a and 12a. Further, substantially arc-shaped bent portions 11c and 12c are formed at the boundary portions of the upright portions 11a and 12a and the flanges 11b and 12b, respectively.

  Here, in the inner panel 11 and the outer panel 12, the lengths between the two flanges 11b and 12b provided in the standing parts 11a and 12a are set to be equal. That is, as shown in FIG. 2, the inner panel 11 and the outer panel 12 correspond to the flanges 11 b and 12 b on the one standing part 11 a and 12 a side and the flanges 11 b and 12 b on the other standing part 11 a and 12 a side, respectively. The lengths between the end portions of the flanges 11b and 12b are set to be equal so that they can be superimposed.

  The reinforcement 13 is a sheet metal member whose cross-sectional shape is processed into a substantially U shape by, for example, press molding. Thereby, the reinforcement 13 has the standing part 13a which is a contact part which contacts along the standing part 12a of the outer panel 12, for example on both sides. The reinforcement 13 has a shape that can be accommodated in the outer panel 12 between the upright portions 12a so that the outer surfaces of the upright portions 13a on both sides come into contact with the inner side surfaces of the upright portions 12a of the outer panel 12. It has become.

  In addition, in a state where the reinforcement 13 is accommodated in the outer panel 12 and the inner panel 11 and the outer panel 12 are joined, each standing portion 13a has an inner panel whose end is closer to the passenger compartment than the flange 12b. The length in the standing direction is set so as to slightly protrude toward the side 11 (see FIGS. 4 and 5) and not to contact the bent portion 11c of the inner panel 11.

  In the panels 11 and 12 and the reinforcement 13 of the center pillar 5 configured as described above, the rising portion 12a of the outer panel 12 and the rising portion 13a of the reinforcement 13 are overlapped, and the flange of the inner panel 11 is overlapped. 11b and the flange 12b of the outer panel 12 are overlapped, and spot welding, which is resistance welding, is applied to a plurality of portions of each overlapping portion, so that every two panels are joined to each other. Furthermore, at least the assembly of the bent portions 11c, 12c and the end portion of the upright portion 13a is filled with an adhesive 15 such as a thermosetting epoxy resin, so that the three panels are integrally joined. Yes.

Hereafter, the assembly procedure of the center pillar 5 which is an example of the sheet-metal joining structure of the vehicle body of the present invention will be described in detail.
First, as shown in FIG. 4, the reinforcement 13 is accommodated from the inner surface of the outer panel 12, that is, the surface on the vehicle compartment side. At this time, the outer panel 12 and the reinforcement 13 are integrally joined by joining the welding parts 16 set to the upright parts 12a and 13a by a plurality of spot weldings.

  In this state, a groove portion 14 is formed along each bent portion 12c between the outer panel 12 and the reinforcement 13 by the end portion of each upright portion 13a slightly protruding from each flange 12b. Then, an adhesive 15 is filled along each groove 14 as shown in FIG. At this time, the adhesive 15 is held on each groove 14 by each groove 14 without flowing down.

  Next, in the inner panel 11, each flange 11 b comes into contact with a corresponding flange 12 b of the outer panel 12 so that an inner space is formed with the outer panel 12. And as shown in FIG. 6, the inner panel 11 and the outer panel 12 are integrally joined by joining the welding part 17 set to each flange 11b and 12b by several spot welding.

  In this state, the adhesive 15 held in the groove portion 14 straddles the three sheet metal parts that are the end portions of the bent portions 11c and 12c of the inner panel 11 and the outer panel 12 and the standing portion 13a of the reinforcement 13, It comes into contact.

  Thereafter, the center pillar 5 to which the three sheet metal parts composed of the inner panel 11, the outer panel 12, and the reinforcement 13 are bonded is cured, for example, at 140 ° to 160 ° for about 20 minutes. It is subjected to a heating process. Thus, the end portions of the standing portions 13 a of the reinforcement 13 are firmly bonded and fixed to the bent portions 11 c and 12 c of the inner panel 11 and the outer panel 12 via the adhesive 15. In other words, each of the bent portions 11c of the inner panel 11 and each of the bent portions 12c of the outer panel 12 has a hardened adhesive 15 interposed in the vicinity of each of the bent portions 11c together with the end of the upright portion 13a of the reinforcement 13. It becomes a state.

  As described above, the center pillar 5, which is an example of the sheet metal joint structure of the vehicle body of the present invention, has 2 in each of the welded portions 16 and 17 where the inner panel 11, the outer panel 12 and the reinforcement 13 are spot welded. By joining only one sheet metal part, even if each sheet metal part required to satisfy the required rigidity has a sufficient thickness, the joining accuracy by welding can be improved.

  In the joint structure in which the two panels (the inner panel 11 and the outer panel 12, the outer panel 12 and the reinforcement 13) are welded with high accuracy, respectively, the bent portions 11c and 12c and the standing portion 13a are further provided. The rigidity of the center pillar 5 can be improved accurately by filling the adhesive 15 in the gathering portion of the end portions and integrally joining the three panels 11, 12, 13.

  That is, due to such a filling structure of the adhesive 15, the adhesive 15 causes the bonding strength between the flanges 11 b and 12 b of the inner panel 11 and the outer panel 12 and the standing parts 12 a and 13 a of the outer panel 12 and the reinforcement 13. The reinforcement 13 and the inner panel 11 can also be joined while improving the joint strength.

  In this case, in particular, the adhesive 15 is filled and fixed in the region between the bent portions 11c and 12c, so that the load transmission efficiency between the upright portions 11a and 12a can be dramatically improved. The rigidity with respect to the load in the direction connecting the sides can be ensured accurately.

  Further, since the flange 13 is not formed on the reinforcement 13 made of a high-strength steel plate, the material cost for the flange can be reduced, the weight can be reduced, and the forming processability can be improved. The force 13 improves the yield.

  Further, by forming the groove portion 14 by the bent portion 12c of the outer panel 12 and the standing portion 13a of the reinforcement 13, the filling of the adhesive 15 is facilitated, the workability is improved, and the ride of the adhesive 15 is improved. The joining accuracy of the inner panel 11, the outer panel 12, and the reinforcement 13 is further improved.

  As a result, the center pillar 5 which is an example of the sheet metal joining structure of the vehicle body of the present invention is improved in rigidity as the joining accuracy of each sheet metal part is improved, and the reinforcement 13 is reduced in weight and molding processability. The cost can be reduced by improving the yield.

  In the present embodiment, the reinforcement 13 is joined to the outer panel 12 by welding, but is not limited to this, and may be joined to the inner panel 11 by welding.

  Furthermore, an adhesive is applied to at least the region in the vicinity of the bent portion 12c of the outer panel 12 or the entire surface on which the standing portions 12a and 13a abut on the surface on which one of the standing portions 12a and 13a abuts. In accordance with this, at least on the surface where one of the flanges 11b and 12b of the inner panel 11 and the outer panel 12 abuts, a region in the vicinity of each of the bent portions 11c and 12c, or each flange You may use what is called a weld bond joining method which apply | coated the adhesive agent to the whole surface which 11b and 12b contact | abut.

  That is, when the weld bond bonding method in which the adhesive 15 is interposed between the upright portions 12a and 13a and the flanges 11b and 12b is used, the bonding accuracy of the welds 16 and 17 is improved by the adhesiveness of the adhesive 15. Thus, the center pillar 5 can be further improved in rigidity.

  Further, in the present embodiment, as described above, the sheet metal joining structure of the vehicle body for joining three sheet metal parts is shown. However, the present invention is applicable to joining of sheet metal parts more than three sheet metal parts. 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 center pillar which followed the II-II line | wire of FIG. 1 concerning the sheet-metal joining structure of the vehicle body of this invention. FIG. 2 is a partial exploded perspective view of the center pillar. It is a perspective view showing the state where reinforcement was joined to the outer panel. It is a figure explaining the state by which the adhesive agent was filled in the groove part formed of the bending part of the outer panel, and the standing part of reinforcement. It is a perspective view which shows the partial external appearance of a center pillar.

Explanation of symbols

1 ... Body shell
5 ... Center pillar
11 ... Inner panel (main panel)
11a: Standing part
11b ... Flange
11c ... bent portion
12 ... Outer panel (main panel)
12a ... Standing part
12b ... Flange
13 ... reinforcement (reinforcement panel)
13a: Standing part (contact part)
14 ... Groove
15 ... Adhesive
16, 17 ... welds
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,
Constituting a standing part standing upright respectively from both sides, a flange is extended outwardly from each of the standing Tatsubu, Ru and a circular arc bend located between the flange and the upright portion, the sheet metal part A first main panel;
Each of which has a standing part that rises from both sides, a flange that extends outward from the standing part, and an arc-shaped bent part that is positioned between the flange and the standing part, and the flange includes the first part A second main panel constituting the sheet metal part joined by welding to the flange of one main panel;
A contact portion that is in contact with any of the upright portion of the first main panel and the upright portion of the second main panel , and the contact portion is in contact with any of the upright portions that are in contact with each other; A reinforcing panel constituting the sheet metal part disposed between the first main panel and the second main panel, which is joined by welding ;
Comprising
The end portion of the contact portion of the reinforcing panel is positioned so as to protrude toward the standing portion side where the contact portion is non-contacting from the boundary between the standing portion and the bent portion on the side where the contact portion contacts. Therefore, a groove is formed between the end portion of the contact portion and the bent portion on the side where the contact portion comes into contact, so that the bent portion has an arc shape,
Since the groove portion is filled with an adhesive, the adhesive causes the bent portion of the first main panel, the bent portion of the second main panel, and the end of the contact portion. A sheet-metal joining structure for a vehicle body, which is integrally joined.

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