JP4120293B2 - Door panel molding method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for press-molding a door panel from a blank material in which plate materials having different thicknesses are butt welded, that is, a so-called tailored blank material.
[0002]
[Prior art]
When the inner panel of the tailgate attached to the rear part of the vehicle is press-molded from the tailored blank material, the upper portion 2 of the blank material 1 has a hinge for mounting to the vehicle body as shown in FIGS. The lower part 3 of the blank 1 is formed of a relatively thin plate, and the upper part 2 and the lower part 3 are located at the position of the joint line 4 between them. It is butt welded, and the weather strip 5 on the body side is to come into contact with the position shown by a two-dot chain line in FIG. 3, but the inner panel 10 of the tailgate illustrated in FIG. As shown in FIG. 6, ridges 11 are formed along the joining line 4 at the edge of the thin plate lower part 3.
Reference numeral 12 denotes an outer panel of the tail gate, and 13 denotes a window glass of the tail gate.
[0003]
Therefore, when the inner panel 10 of the tailgate abuts against the weather strip 5 on the body side, a gap 14 is generated in the portion of the flange 11 between the weather strip 5 and the inner panel 10, and as a result, the seal by the weather strip 5 is sealed. There was a problem that performance deteriorated.
[0004]
Japanese Patent Application Laid-Open No. 2001-259551 discloses a bead in which a large inflow resistance is formed in the vicinity of the joint portion of the aggregate blank material. This bead is a plate material having a different thickness. It is not provided on both sides of the place where the weather strip abuts across the joint.
[0005]
[Problems to be solved by the invention]
Even if the door panel is press-molded from the tailored blank material, the present invention intends to prevent wrinkles from occurring on the thin plate side along the joining line of the thick plate and the thin plate in the tailored blank material.
[0006]
[Means for Solving the Problems]
Thus, door panel molding method according to the present invention, the bead intersecting the upper Symbol joining line weatherstripping straddling the junction lines between the thick plate and thin in tailored blank is adjacent on both sides of the abutting locations The tailored blank material is press-worked so as to be partially formed at the junction between the thick plate and the thin plate .
[0007]
That is, the bead straddling the junction lines between the thick plate and thin in tailored blank is weatherstripping intersects the respective adjacent perilla respectively the joint line on both sides of the abutting locations, and the thick and the thin plate to partially form the joint portion, so that by pressing the tailored blank, respectively at the time of press working material in tailored blank locations weather strip abuts along the joint line to each bead side Since it is pulled in, particularly strong tension acts on the material at the above location, and it is possible to easily prevent wrinkles from occurring on the thin plate side along the joining line.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention shown in the drawings will be described by assigning the same reference numerals to the same parts as those of the prior art.
[0009]
1 and 2, the upper portion 2 of the blank 1 is formed of a thick plate, while the lower portion 3 of the blank 1 is formed of a relatively thin plate, and the upper portion 2 and the lower portion 3 are joined lines 4 between them. The weather strip 5 on the body side is abutted at the position indicated by a two-dot chain line in FIG. 1, and the tailgate inner panel 20 attached to the rear portion of the vehicle is attached to this tailored When the blank material 1 is press-molded, it is adjacent to both sides of the portion 21 where the weather strip 5 abuts over the joining line 4, and as illustrated in the broken line in FIG. 1 and FIG. 2, the joining line 4. The bead 22 that intersects with the tailored blank 1 is partially pressed.
[0010]
Therefore, when both the beads 22 are pressed, the blank 1 is pulled along the bonding lines 4 to the respective beads 22, that is, to both sides along the bonding lines 4, so that the weather strip 5 is moved to the inner panel 20. As a result, particularly strong tension acts on the blank material 1 at the portion 21 in contact with the inner surface 20 of the blank material 1. As a result, in the inner panel 20 after press molding, wrinkles occur in the thin plate portion of the lower portion 3 along the joining line 4. Can be easily prevented.
[0011]
For this reason, there is a feature that the sealing performance of the body-side weather strip 5 with respect to the inner panel 20 of the tailgate can always be kept good, and the molding of each bead 22 does not cause a special increase in cost. Since each bead 22 may be relatively small, the appearance of the tailgate is not particularly impaired by the formation of the bead 22.
[0012]
In the above embodiment, the inner panel of the tailgate in the vehicle is press-molded, but the same applies to the case where panels such as side doors, trunk lids, engine hoods, etc. in the vehicle are press-molded from tailored blank materials. Needless to say, the present invention can be carried out and the same effects as the above-described embodiment can be achieved.
[0013]
【The invention's effect】
According to the door panel molding method of the present invention, even if the door panel is press-molded from the tailored blank material, it is easily prevented that wrinkles are generated on the thin plate side along the joining line of the thick plate and the thin plate in the tailored blank material. Therefore, the sealing performance of the weather strip that abuts against the door panel across the joining line can always be kept good.
[Brief description of the drawings]
FIG. 1 is a front view of a plate material to which an exemplary embodiment of the present invention is applied.
FIG. 2 is an enlarged cross-sectional view taken along the line II-II in FIG. 1 of the door panel in which the above embodiment is used.
FIG. 3 is a front view of a plate material to which a conventional technique is applied.
4 is an enlarged sectional view taken along the line IV-IV in FIG. 3;
5 is an enlarged cross-sectional view taken along the line VV in FIG. 3 of a door panel in which a conventional technique is used for the plate material.
6 is an enlarged cross-sectional view taken along the line VI-VI in FIG. 3 of a door panel in which a conventional technique is used for the plate material.
[Explanation of symbols]
1 Blank material 4 Joining line 5 Weather strip 20 Door inner panel 22 Bead

Claims (1)

The bead intersecting the upper Symbol joining line weatherstripping straddling the junction lines between the thick plate and thin in tailored blank is adjacent on both sides of the abutting locations, the joint portion between the thick and the thin plate A door panel molding method in which the tailored blank material is pressed so as to be partially formed.

Images