JPH0732885A - Manufacture of automobile door - Google Patents

Abstract

PURPOSE:To reduce weight in an automobile door by fixing an inner panel by joining an outer panel, a flange coming into contact with the peripheral inside surface, the rise part, an inner installing part, a middle panel, a mask part of a central opening part and a rise part and the like together integrally. CONSTITUTION:An outer panel 2 composed of a cold rolling steel plate forms a hemming part 2a in a peripheral part. A middle panel composed of an aliminium material forms a flange 3a inscribed in the hemming part 2a, a rise part 3b continuing to this flange part 3a and an inner installing part 3c, and a nut 5 is welded to the reverse side of the inner installing part 3c, that is, to the side facing the outer panel 2. An inner panel 6 forms an installing flange 6a and a mask part 6c, and the inner installing part 3c is butted by the installing flange 6a by sandwiching a juction 7 to hold an impact bar 8 between them, and a bolt 4 is screw-fitted/fixed to the nut 5. Since there is no limitation caused by a controversial point of a raw material in welding, a lightweight material can be used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an automobile door in which door internal mechanical parts can be easily attached and the weight of which can be reduced by arbitrarily selecting a constituent panel or the like.
More specifically, the automobile door has a three-part structure,
The present invention relates to a method for manufacturing an automobile door that is made lighter by appropriately using aluminum or a plastic material.

[0002]

2. Description of the Related Art In a conventional automobile door, for example, an outer panel and an inner panel are separately press-formed by steel plates, and the two are integrated by spot welding, and then a service hole previously drilled in the inner panel is formed. A predetermined internal mechanical part such as a door handle and a window regulator was attached via the above.

[0003]

Recently, there are strong demands for reduction of harmful substances contained in exhaust gas and efficient use of fuel consumption. In order to meet these demands, it is necessary to reduce the weight of the vehicle body and reduce the toxic components in the exhaust gas. However, since most of the material forming the door panel is a heavy steel plate as described above, the weight of the vehicle body cannot be reduced unless the weight of the door panel is reduced. Further, in the conventional door panel, after the outer panel and the inner panel are integrally joined as described above, the internal mechanical parts such as the window glass and the window regulator are incorporated, which requires skill in assembling, and It was difficult to automate the attachment work process.

In view of the above-mentioned drawbacks of the prior art, the present invention makes it possible to reduce the weight as a whole by configuring each main member with a different material, and to easily automate the assembly of internal mechanical parts. It is an object of the present invention to provide a method for manufacturing such an automobile door.

[0005]

SUMMARY OF THE INVENTION In view of the disadvantages of the prior art, the present invention has a flange contacting the inner surface of the outer panel periphery, a rising portion formed continuously with the flange, and the flange portion extended in the opposite direction. An inner mounting portion, a middle panel having a central opening portion, an outer panel formed separately from the middle panel, a cover surface portion covering the central opening portion, a falling portion continuous with the cover surface portion, and an outer periphery. After the inner panel, which is formed with an assembling flange extended in the direction, and the middle panel and the outer panel are integrated by a connecting means such as hemming, the inner panel is assembled by fixing means such as bolts and nuts. Car doors are manufactured by this method.

[0006]

According to the present invention, the inner panel, which is a common component, and the outer panel assembly, which is a dedicated component for each model, are coupled by bolts and nuts, and the panels are coupled by spot welding. Because there is no
The outer panel assembly and the inner panel can be formed of any appropriate material regardless of the electric resistance value of the material. Therefore, it is possible to design an automobile door in consideration of only required elements such as strength and weight as a door panel. In addition, since the inner panel can be shared, molds and jigs are not required when developing a new model car, and capital investment costs can be reduced.

Further, according to the present invention, it is possible to mass-produce the inner panel, which is a common component, and to produce the outer panel, which is a dedicated component, as needed. For this reason,
The door panel according to each vehicle type can be produced in a short time, the production control becomes easy, and the cost can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an illustrated embodiment. In the drawings, FIG. 1 is a front view showing an automobile door of an embodiment of the present invention from the front panel side, and FIG. 2 is FIG.
FIG. 3 is a central cross-sectional view of FIG. 3, and FIG. 3 is a perspective view showing constituent members of the door panel. In FIG. 1, a vehicle door 1 has an outer panel 2 to which a middle panel 3 is attached, and an inner panel 6 attached to the outer panel 2, and a window glass 1a on the upper portion.
Is shown protruding. The automobile door 1 includes a flange 3 of the middle panel 3 and the inner panel 6.
a and the assembly flange 6a are butted and fixed by bolts and nuts described later.

Next, in FIGS. 2 to 3, the outer panel 2 made of a cold rolled steel plate has a hemming portion 2a at the peripheral edge portion.
To form. The middle panel 3 made of an aluminum material has a flange 3a inscribed in the hemming portion 2a, and the flange 3a.
A rising portion 3b and an inner mounting portion 3c which are continuous with the inner mounting portion 3c.
The nut 5 is welded to the side facing the. This middle panel 3
In some cases, an adhesive α may be applied between the flange 3a and the outer panel 2 to bond them instead of the hemming process.

The inner panel 6 made of cold-rolled steel plate, aluminum material, plastic or the like has an assembly flange 6a and a covering surface portion 6c formed, the assembly flange 6a is butted to the inner attachment portion 3c, and the bolt 4 is attached to the nut 5. Secure by screwing. The inner mounting portion 3c and the mounting flange 6
When a is to be abutted, the junction 7 holding the impact bar 8 is sandwiched here.

Further, the window glass 11, the window regulator 12, and other internal mechanical parts such as a door lock (not shown) are also incorporated. The example shown above is merely one embodiment of the present invention, and various other embodiments of the present invention are conceivable in addition to this one example. It was done.

[0012]

As described above, according to the present invention, the outer panel and the inner panel made of cold-rolled steel sheet, which were conventionally joined by spot welding, are joined by bolts and nuts. Therefore, aluminum materials and other lightweight materials can be used. Therefore, there are no obstacles to reducing the weight of the automobile door.

Further, according to the present invention, since the impact bar is attached to the middle panel via the junction, the internal mechanical components are attached, and then the inner panel is attached with the bolts and nuts, the automobile door is formed. Is extremely easy, and the assembly process can be easily automated. When performing maintenance or the like, the member can be disassembled without being damaged if the fastening by the bolt and nut is released, and the work can be performed in an extremely short time, so that the work efficiency can be improved.

According to the present invention, in a vehicle door, a portion common to all vehicle types, such as an inner panel, and a portion unique to each vehicle type, such as an outer panel, are separately formed. As described above, since the door panel is constructed by coupling with the bolts and nuts, it is possible to cope with a model change in the middle of production and to minimize the loss of parts.

Further, according to the present invention, as described above, in the automobile door, the inner panel which is a common component,
The outer panel, which is a dedicated part, can be manufactured in different lots. Therefore, since it is possible to mass-produce the inner panel which is a common part in advance and to produce the outer panel and the middle panel which are special parts as needed, the production management is easy, and the production of the special parts is performed as needed. Therefore, the cost can be reduced, the productivity can be improved, and the industrial contribution is extremely large.

Further, according to the present invention, since the inner panel can be used in common, molds, jigs, etc., at the time of developing a new vehicle are not required, and there is an economic effect that the capital investment cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view showing an automobile door according to an embodiment of the present invention as viewed from a front panel direction.

FIG. 2 is a central cross-sectional view of FIG.

FIG. 3 is an exploded perspective view showing the configuration of an embodiment of the present invention.

[Explanation of symbols]

 1 Automotive Door 1a Sash 2 Outer Panel 2a Hemming Part 3 Middle Panel 3a Flange 3b Rising Part 3c Inner Mounting Part 4 Bolt 5 Nut 6 Inner Panel 6a Assembly Flange 6b Falling Part 6c Cover Part 7 Junction 8 Impact Bar 9 Hinge Outer Stay 10 11 Window glass 12 Wind regulator

Claims (3)

[Claims] 1. A flange in contact with the inner surface of the outer panel peripheral edge, and a rising portion formed continuously with the flange,
An inner mounting portion extending in a direction opposite to the flange portion, a middle panel having a central opening portion, an outer panel formed separately from the middle panel, and a cover surface portion covering the central opening portion, The inner panel formed with a falling part continuous to the cover surface part, an assembly flange extended in the outer peripheral direction, and the middle panel and the outer panel are integrated by a coupling means such as hemming, and then the inner panel is formed. A method of manufacturing an automobile door, characterized in that the vehicle door is assembled by fixing means such as bolts and nuts. 2. The method of manufacturing an automobile door according to claim 1, wherein in the automobile door, the outer panel, the middle panel, and the inner panel are made of a combination of different materials. 3. An outer panel and a middle panel are joined together by hemming or the like, and an inner panel is assembled with door inner mechanical parts, and then both are integrated. Manufacturing method of automobile door.