JPH06298123A - Joint structure of sheet metal parts - Google Patents

Abstract

PURPOSE:To simultaneously perform the shearing work of an inclined plane part and a plane part of one side sheet metal, and improve sealing performance of the joint part of both sheet metal parts. CONSTITUTION:In the joint construction of sheet metal parts, a pair of sheet metal parts, a main floor panel 1 and a dash panel 2, are provided which are joined with each other at their inclined plane parts 3, 9, a flange 3a in parallel with the plane part 4 is provided on the extreme end of the inclined plane part 3 of the main floor panel 1, and a recessed part 9a to be inserted with the flange 3a is provided on the inclined plane part 9 of the dash panel 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure for sheet metal parts constituting a vehicle body of an automobile.

[0002]

2. Description of the Related Art Conventionally, the body of an automobile is constructed by joining various sheet metal parts to each other by spot welding or the like. Examples of such a joining structure of sheet metal parts include those shown in FIGS. 4 to 6. Of these, the main floor panel 51 and the dash panel 52 are configured such that the slope portions 51a and 52a are joined to each other by spot welding.

However, when the front end portion (thick line portion S in FIG. 4) of the sloped portion 51a is subjected to shearing after the main floor panel 51 is molded, the sloped portion 51a shown by the thick line portion S in the prior art is flushed. After trimming in the direction,
Two steps are taken: trimming b.

[0004]

However, in the above-mentioned conventional joining structure, the sloped portion of the main floor panel 51 after molding is performed by using the mold 55 including the punch 53 and the die 54 shown in FIG. When the shearing process of 51a is performed in the direction perpendicular to the bottom surface of the flat portion 51b, the mold 1
1 may slip on the slope of the slope 51a,
There is a problem that it is difficult to obtain the dimensional accuracy of the slope portion 51a of the main floor panel 51. Moreover, the punch 5
Since the cutting edge angles of 3 and the die 54 were manufactured to be acute, the mold 11 was easily damaged. Therefore, in the conventional joining structure, the slope portion 51a of the main floor panel 51 is
It is necessary to perform shearing processing separately from the flat surface portion 51b, resulting in high cost in terms of mold cost and processing cost.

Further, in the conventional joint structure, as shown in FIG. 6, the sealer 5 is attached to the joint portion between the slope portion 51a of the main floor panel 51 and the slope portion 52a of the dash panel 52.
In the case of applying No. 6, since the applied sealer 56 becomes a protrusion, peripheral parts come into contact with the sealer 56 and the slope 51
In addition to being easily peeled off from a and 52a, and the sealing area was small, it could not be said that the sealing property at the joint portion of both panels 51 and 52 was good.

The present invention has been made in view of the above circumstances, and an object thereof is to perform shearing of a slope portion of one sheet metal component at the same time as a flat portion and to seal a joint portion of both sheet metal components. It is intended to provide a joining structure of sheet metal parts capable of improving the property.

[0007]

In order to solve the above problems of the prior art, in the present invention, a pair of sheet metal parts joined to each other at the slopes is provided, and the tip of the slope of one of the plate parts is provided. A flange parallel to the flat surface portion is provided, and a relief portion for inserting the flange is provided on the slope portion of the other sheet metal part.

[0008]

In the joining structure for sheet metal parts according to the present invention, a pair of sheet metal parts are joined to each other at the slope portions, and a flange parallel to the flat surface portion is provided at the tip of the slope portion of one sheet metal part,
Since the relief part for inserting the flange is provided on the slope part of the other sheet metal part, it becomes possible to perform shearing processing of the slope part of one sheet metal part at the same time as the flat part, and a separate process is required as in the past. It is not necessary, and the sealer reservoir can be formed on the slopes of both sheet metal parts by the flange and the relief.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the illustrated embodiments.

1 to 3 show an embodiment of a joining structure for sheet metal parts according to the present invention. In the figure, 1 is a main floor panel that constitutes an underbody of an automobile, 2 is a dash panel that separates a vehicle interior from an engine compartment, and these main floor panel 1 and dash panel 2 are a pair of metal sheet metal parts to be joined. Being manufactured. The front end of the main floor panel 1 and the lower end of the dash panel 2 are joined together by spot welding.

The main floor panel 1 has an inclined surface portion 3 and a flat surface portion 4. The inclined surface portion 3 is provided at the front end portion of the main floor panel 1 and has a predetermined angle toward the front side of the vehicle body. It is bent upward. Further, a flange 3a formed by bending the inclined surface portion 3 of the main floor panel 1 in parallel with the bottom surface of the flat surface portion 4 is provided at the tip of the inclined surface portion 3. Therefore, when the main floor panel 1 is processed, the shearing direction of the flange 3a located at the tip of the sloped portion 3 is also substantially perpendicular to the bottom surface of the flat portion 4, and the mold described later slides on the sloped portion 3. Without this, the entire front end portion of the flange 3a (corresponding to the thick line portion S in FIG. 4) can be sheared at the same time.

However, in the shearing process of the sloped portion 3 of the main floor panel 1 after molding, a die 7 composed of a punch 5 and a die 6 as shown in FIG. 2 is used.
With this mold 7, the flange 3a of the slope 3 is sheared to a predetermined length. Further, the punch 5 and the die 6 are formed such that the cutting edge angles thereof are substantially right angles, and the die 7 is less likely to be damaged. The plane portions 4 are arranged on both left and right sides with a tunnel portion 8 extending in the vehicle front-rear direction in between.

On the other hand, as shown in FIG. 3, the dash panel 2 has an inclined surface portion 9 which is joined to the inclined surface portion 3 of the main floor panel 1, and the inclined surface portion 9 is the lower end portion of the dash panel 2. And is formed to be bent downward toward the rear side of the vehicle body at an angle corresponding to the slope portion 3 of the main floor panel 1. Further, in the middle of the slope portion 9 of the dash panel 2, the flange 3a of the main floor panel 1 is provided.
Is provided with an escape portion 9a for inserting the escape portion 9a.
The a is formed by denting the slope portion 9 into a substantially L-shaped cross section. Then, the escape portion 9a has a plane perpendicular to the horizontal plane, and the depth is formed larger than the length of the flange 3a, so that the flange 3a can be arranged so as to overlap the horizontal plane of the escape portion 9a.

That is, the flanges 3a are formed on the sloped portions 3 and 9 of the main floor panel 1 and the dash panel 2.
And the escaper 9a, the sealer pool 10
The sealer 11 is provided so that the sealer 11 for filling the gap can be applied to the sealer reservoir 10. Moreover, in the sealer pool portion 10, the applied sealer 11 has sloped portions 3 of the main floor panel 1 and the dash panel 2.
It is formed in a size that does not protrude from the outside. Therefore, the main floor panel 1 and the dash panel 2
As shown in FIG. 3, the joint portion between the inclined surface portions 3 and 9 is formed into a flat surface even when the sealer 11 is coated with the sealer 11.

In order to join the main floor panel 1 and the dash panel 2 of this embodiment, first, the flange 3a of the main floor panel 1 is attached to the relief portion 9a of the dash panel 2.
And the inclined surfaces 3 and 9 of both panels 1 and 2 are overlapped. In this state, the sloped parts 3, 9
When the overlapping portions of are fixed by spot welding, the panels 1 and 2 are joined to each other. After that,
When the sealer 11 is applied and attached to the sealer pool portion 10, the joining work is completed (see FIG. 3).

In the joint structure of this embodiment, a flange 3a parallel to the bottom surface of the flat portion 4 is provided at the tip of the sloped portion 3 of the main floor panel 1, and the flange 3a is inserted into the sloped portion 9 of the dash panel 2. Since the relief portion 9a is provided, the flange 3a of the sloped portion 3 of the main floor panel 1 can be sheared simultaneously with the flat surface portion 4 by the mold 7 shown in FIG. 2, and the shearing of the sloped portion 3 is performed separately. There is no need. Moreover, since the sealer reservoir 10 including the flange 3a and the escape portion 9a is provided on the sloped portions 3 and 9 of both panels 1 and 2, it is possible to apply the sealer 11 to the sealer reservoir 10. Both panels 1,
The joint portion of 2 can be formed on a flat surface, and the sealing property against water leakage is improved. Further, in the joining structure of the present embodiment, since the punch 5 of the die 7 used for shearing and the die 6 have substantially the same cutting edge angle, the die 7 is damaged as compared with the conventional case. Is less likely to occur.

The embodiment of the present invention has been described above.
The present invention is not limited to the embodiments described above, and various modifications and changes can be made based on the technical idea of the present invention.

For example, in the above-mentioned embodiments, the joining structure of the present invention is applied to the main floor panel 1 and the dash panel 2.
However, it can be applied to other sheet metal parts constituting an automobile body or the like.

[0019]

As described above, the joining structure for sheet metal parts according to the present invention comprises a pair of sheet metal parts that are joined to each other at the slopes, and a flange parallel to the flat part is provided at the tip of the slope part of one sheet metal part. Since the relief portion for inserting the flange is provided on the slope portion of the other sheet metal component, it is possible to perform the shearing process on the slope portion of the one sheet metal component at the same time as the flat surface portion, as in the conventional case. Since it is not necessary to perform shearing on the sloped part separately from the flat part, the number of steps can be reduced, and the cutting edge of the mold used for shearing does not have to be manufactured to an acute angle, which makes it less prone to damage. Processing costs and mold costs can be reduced. Moreover, according to the joining structure of the present invention, the flange and the relief portion of the pair of sheet metal parts can be used as the sealer reservoir portion, and the joint portion can be formed into a flat surface due to the presence of the sealer reservoir portion. It is possible to improve the sealing property in the joint portion of the sheet metal parts.

[Brief description of drawings]

FIG. 1 is a perspective view conceptually showing an interior side of an automobile in which a main floor panel and a dash panel are joined by applying a joining structure according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view conceptually showing a state in which the slope portion of the main floor panel is sheared by a mold.

FIG. 3 is a sectional view conceptually showing a state in which a main floor panel and a dash panel are joined by the joining structure of the above embodiment.

FIG. 4 is a perspective view conceptually showing a main floor panel and a dash panel joined by a conventional joining structure.

FIG. 5 is a sectional view conceptually showing a state in which a conventional sloped surface portion of a main floor panel is sheared by a mold.

FIG. 6 is a sectional view conceptually showing a state in which an in-floor panel and a dash panel are joined by a conventional joining structure.

[Explanation of symbols]

 1 Main Floor Panel 2 Dash Panel 3 Slope of Main Floor Panel 3a Flange 4 Plane of Main Floor Panel 7 Mold 9 Slope of Dash Panel 9a Escape 10 Sealer Reservoir 11 Sealer

Claims (4)

[Claims] 1. A pair of sheet metal parts joined to each other on a slope portion, a flange parallel to the flat surface portion is provided at the tip of the slope portion of one sheet metal component, and the flange is inserted on the slope portion of the other sheet metal component. A joint structure for sheet metal parts, which is characterized in that a relief portion is provided. 2. The sealer reservoir portion formed by the flange and the relief portion of the sheet metal component is provided on the sloped portion of the pair of sheet metal components.
The joining structure of the sheet metal parts described in. 3. The joining structure for sheet metal parts according to claim 2, wherein the joining part of the pair of sheet metal parts is formed on a flat surface in a state where the sealer is applied with a sealer. 4. The joining structure for sheet metal parts according to claim 1, wherein the pair of sheet metal parts is a floor panel and a dash panel of an automobile.