JPS5827151B2 - Shiatai Gaihan no Tsugi Mesetzokuhouhou - Google Patents

Description

[Detailed description of the invention] TECHNICAL FIELD The present invention relates to a joint connection method for outer panels of a vehicle body, such as an automobile.

In constructing an automobile outer panel, plates are press-formed in several parts and connected at necessary locations.

For example, as shown in FIG.
A seam 4 between the quarter part 3 and the quarter part 3 is formed.

It is preferable that such a seam be formed so that it is not noticeable in appearance, and therefore, conventionally, such a seam is formed by a process as shown in FIG. 2.

That is, as shown in FIG. 2a, first, both the roof part 2 and the quarter part 3 are bent greatly toward the back side of the outer panel at the part where the seam 4 is formed. The preferred smooth contoured surface 5 is provided with a recess 6 which is more concave.

In this state, the roof part 2 and the quarter part 3 are welded to each other at the welding part 7 by spot welding, and are firmly joined.

Thereafter, as shown in the same figure, a solder mound 8 is applied to the seam 4 to fill the recess 6.

In this case, the solder mound is formed so as to protrude beyond the contoured surface 5.

Thereafter, as shown in FIG. 3C, the portion of the solder that protrudes beyond the contoured surface 5 is removed using a grinder or the like, and the contoured surface 5 that smoothly connects the roof section 2 and the quarter section 3 is formed.

In the conventional seam forming method as described above, both of the plate materials constituting the roof part 2 and the quarter part 3 to be joined to each other are spot-welded to each other by a contour surface 5 at the part where they are spot welded together and in the vicinity thereof. It is made to curve inward to a larger extent, and the entire recess 6 at the joint created by this curvature is made of solder.The volume of this recess 6 is quite large, so it is necessary to heap up a large amount of solder. year,
There is a problem of occupational diseases in which the solder atmosphere harms the health of workers.

Pinholes and blisters are likely to occur in solder areas, and if pinholes and blisters are just exposed on the outer surface when the contoured surface 5 as shown in Fig. 2g is formed, it is necessary to There is a problem in that the solder application work may have to be redone.

In addition, methods such as edge arc welding and welding for brazing are conventionally known, but these welding methods are particularly effective at welding joints when the outer panels of automobiles are made of thin plates. There is a problem that distortion occurs in the process, and a large number of man-hours are required to correct the distortion.

A method of using plastic instead of solder is being considered using a technique similar to the solder application technique described above, but if plastic is used, electrodeposition cannot be applied during the painting process. In this case as well, the problem of pinholes or blisters remains, as in the case of solder mounds.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of conventional methods for making connections between automobile skins, the present invention aims to provide an improved method which eliminates the various drawbacks mentioned above.

According to the present invention, the present invention provides a method for connecting the first and second plate materials constituting the outer panel of an automobile to form a joint, and providing a method for connecting the first and second plate materials constituting the outer skin of an automobile to form a joint. the ends are offset toward the front and back sides of the outer skin by an amount substantially equal to the thickness of the board, and the offset end of the second board comes into contact with the back surface of the base of the first board; Further, the two plates are overlapped in such a manner that the deflected end of the first plate comes into contact with the base surface of the second plate, and the plate is brought close to the deflected end of the first plate. The base portion and the displaced end portion of the second plate material overlapping with the base portion are spot welded by pressing while applying a patch plate to the surface of the first plate material, and the deflection of the first plate material is The removed end portion is substantially removed, and the portion is removed until it is cut into the contour plane that smoothly connects the bases of the second and second plates, and a layer of putty is applied to the removed portion. This is accomplished by a method such as applying the putty layer and removing the surface portion of the putty layer until it presents a surface that corresponds to the contour surface.

FIG. 3 attached thereto is an explanatory view showing the case where the method of the present invention is applied to the formation of the joint 4 between the roof part 2 and the quarter part 3 as shown in FIG.

As shown in figure a, one of the plates connected to each other, i.e.
In this case, the end 9 of the roof part 2 is offset towards the surface of the skin by an amount substantially equal to the thickness of the board, and the end 9 of the roof part 2 is offset towards the surface of the skin by an amount substantially equal to the thickness of the board, and the end 9 of the roof part 2 is 10 is
It is also offset toward the back side of the plate by an amount substantially equal to the thickness of the plate.

As shown in FIG. 3, the two plates having such deviated ends are in contact with the back surface side of the base 11 of the first plate 2, so that the deviated end 10 of the second plate 3 is in contact with the back side of the base 11 of the first plate 2. Also, the offset end 9 of the first plate 2 is attached to the surface of the base 12 of the second plate 3.
are superimposed on each other in such a manner that they are in contact with each other.

Next, as shown in FIG. 3g, the portion of the base 11 that is close to the deflected end 9 of the first plate 2 and the deflected end 10 of the second plate 3 that overlaps therewith are separated. While applying a backing plate (back bar) 13 to the front side of the first plate material 2, pressure is applied using a pair of spot welding electrodes 14 and 15 to spot weld the two plate materials to form a welded portion 16.

Then, as shown in FIG. 3g, the deflected end 9 of the first plate 2 is substantially removed and the contours smoothly connecting the bases of the first plate 2 and the second plate 3 are then formed. The relevant portion is deleted until it cuts into the surface 17 somewhat.

When such deletion is carried out, the joint portion of the outer panel becomes in a state where it exhibits a recess 18 which is somewhat recessed from the contour surface 17 at the joint portion, as shown in FIG. 3g.

The depth of this depression 18 from the contour surface 17 is 0.1
It is preferable to set it as 0.15 m.

A layer of putty 19 is then applied to the surface area including the recess 18 after the edge 9 has been removed, as shown in FIG. 3f.

Thereafter, the surface portion of the putty layer 19 is removed by the Institute until it presents a surface that corresponds to the contour surface 17, as shown in Fig. 3g.
As shown in FIG. 2, a joint portion 4 is formed which presents a surface that smoothly connects the bases of the plates 2 and 3.

FIG. 4 shows a roof section 2 according to the present invention as shown in FIG.
When forming the seam 4 between the quarter part 3 and the quarter part 3, the density at which the weld part 16 is formed by spot welding as described above is
Welded part 7 in the conventional seam connection method as shown in Fig. 2
FIG.

In the case of the method of the present invention, the surface portion of the joint is not provided mainly by solder piled up as in the case of the conventional joint connection method as shown in FIG. Since the outer surfaces of the plates substantially forming the roof section 2 and the quarter section 3 except for the parts shown in FIG. It is necessary to form the welds 7 at shorter intervals, that is, at a higher density along the seam, than the intervals between the welds 7 in the case of the above method.

More specifically, the distance d between adjacent welded parts 16 formed in the method of the present invention is preferably about 15 mm, which is different from that in the conventional method as shown in FIG. It is formed.

When the outer surface of the joint is substantially formed by the outer surfaces of the plates that are joined together, as in the present invention, the spots are placed between the plates so that no distortion occurs in the plates at the joint. The welding is preferably relatively light, and if the density of the spot welds is correspondingly increased, sufficient strength at the joint can be maintained.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the rear part of a passenger car, in particular the joint between the roof part and the quarter part formed in a part of the rear part, and Figures 2 a-c.
Figure 3a is a sectional view of the joint showing the conventional method of forming a joint between the roof part and the quarter part using solder.
g is a sectional view of a joint part for explaining the method according to the present invention, and Fig. 4 is a welded part formation when the joint between the roof part and the quarter part is connected by the conventional method using solder mounding and the method according to the present invention. FIG. 1... Rear window, 2... Roof part, 3... Quarter part, 4... Seam, 5
...Outer plate contour surface, 6...Indentation, 7.
...Welded part, 8... Solder mound, 9.
10... deflected end, 11.12...
...Base, 13...Packing plate, 14,15...
...Spot welding electrode, 16...Welded part,
17...Contour surface, 18...Indentation, 1
9...putty layer.

Claims (1)

[Claims] 1. A method in which first and second plate materials constituting an automobile outer panel are connected to form a joint, and the ends of the first and second plate materials are respectively connected to the surface side of the outer panel in proximity to the joint. and deflected toward the back side by an amount substantially equal to the thickness of the plate material, such that the deflected end of the second plate contacts the back surface of the base of the first plate, and the base of the second plate The two plates are overlapped in such a manner that the deflected end of the first plate comes into contact with the surface, and the second plate overlaps with the base near the deflected end of the first plate. The deflected end portion of the first plate material is spot welded by pressing while applying a patch plate onto the surface of the first plate material, and the deflected end portion of the first plate material is substantially removed. Then, remove the part until it cuts into the contour plane that smoothly connects the bases of the second and second plates, apply a layer of putty to the removed trace, and remove the surface part of the putty layer. A method for connecting a seam on a car body outer panel, characterized in that the seam is removed by water grinding until a surface matching the contour surface is obtained.