JPH0585432A - Assembly method of car - Google Patents

Abstract

PURPOSE:To increase the quality of paint of an outer plate part of a car body. CONSTITUTION:An outer plate part 2 connected to a car body main body 1 to construct the car body is separated from the car body main body 1 before it enters a paint and dry process PS, and the car body main body 1 and the outer plate part 2 positioned roughly horizontal are painted and dried independently in the paint and dry process PS. After they have passed the paint and dry process PS, the outer plate part 2 is assembled into the car body main body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling an automobile.

[0002]

2. Description of the Related Art An automobile is assembled by four steps including a pressing step, a joining step, a painting / drying step, and an assembling step. Conventionally, it is obtained by press forming a steel sheet in the pressing step. The parts are assembled together to complete the construction of the car body (commonly called white body because it is unpainted), and in the next painting and drying process, the white body is pretreated and undercoated ( Generally, electrodeposition coating), sealing, intermediate coating, and top coating are applied, and in the assembly process, parts such as engine, tires, steering wheel, and seat are assembled to the finished vehicle to complete the vehicle.

[0003]

By the way, recently, metallic coating is widely used, but this coating is a so-called wet-on-wet coating of a base coating containing aluminum powder and a transparent clear coating. ,
In White Body, parts such as doors that are almost vertical are painted while being affected by gravity. For this reason, in the base paint, there is a difference in the arrangement of the aluminum powders on the vertical surface and the horizontal surface, which causes a slight difference in the appearance of the color. Further, when considering the flowability during drying, the paint design is performed in consideration of the sagging limit of the clear paint on the vertical surface, so that there is a slight difficulty in the image clarity. In addition, even if it is not metallic coating, coating with the outer panel parts that are almost vertical planes attached to the body of the vehicle body may cause the paint to drip, and the coating machine has to make a complicated movement,
Furthermore, it is difficult to evenly coat the part that becomes a horizontal surface.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an assembling method for an automobile in which the coating quality of the outer panel component of the automobile body is improved.

[0005]

In order to achieve the above object, according to the method of the present invention, an outer panel component which is connected to a vehicle body and constitutes a vehicle body is separated from the vehicle body before painting and drying steps. Every time, the car body and the outer panel component that is placed in a substantially horizontal position are individually painted and dried in the painting and drying process, and after the painting and drying process, the outer panel component is assembled to the car body.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, referring to FIG. 1 showing the first embodiment of the present invention, a car body is manufactured by a pressing step, a joining step WS, a coating step Four steps of a drying step PS and an assembling step MS are sequentially performed, and the vehicle body 1 formed separately in the joining step WS, a door, a hood, etc. to be attached to the vehicle body 1 Skin parts 2
And move along the main line 3 and the sub line 4, respectively.

In the coating / drying process PS, the pretreatment booth 5
A draining drying oven 6, an undercoat booth 7, a drying oven 8;
Sealer booth 9, drying oven 10, topcoat booth 11
And the drying furnace 12 are arranged in this order.

Further, in the assembling step MS, a first fitting portion 13 for fitting the vehicle body 1 and a second fitting portion 14 for fitting the outer plate component 2 are installed in parallel.

Explaining the operation of this embodiment, the parts obtained by pressing the steel sheets in the pressing step are assembled together by welding or adhering a thermosetting adhesive in the joining step WS, and 1 and an outer plate part 2 are formed respectively. Moreover, at this time, the outer plate component 2 and the vehicle body 1
The outer plate component 2 and the outer plate component mounting portion of the vehicle body 1 are inspected with the master component so that can be finally and correctly assembled.

Next, in the painting / drying process PS, the body 1
And the outer panel component 2 are a pretreatment booth 5, a draining drying oven 6, an undercoating booth 7, a drying oven 8, a sealer booth 9, and a drying oven 1.
No. 0, the coating booth 11 and the drying oven 12 are separately or alternately passed through for coating. Moreover, the outer plate component 2
Is in a substantially horizontal position as it goes through the painting / drying process PS.

Body 1 after painting and drying process PS
Is brought to the first outfit 13 of the next assembly step MS,
Outfitting is performed by the first outfitting section 13. On the other hand, painting
After the drying process PS, the lids 2 are outfitted by the second outfitting section 14. Then, after the outfitting is completed, or after the outfitting and the replenishment of oil and fat are completed, the outer panel component 2 after the outfitting is attached to the vehicle body 1 to complete the assembly of the vehicle body.

According to the assembly of such a vehicle, the outer plate part 2 in a substantially horizontal position is painted and dried, so that the coating of the outer plate part 2 is automated by a simple device such as a reciprocator as the best coating position. It is possible to apply a uniform coating to any of the outer plate components 2, and it is possible to prevent a subtle difference in color from occurring. Further, even if the outer panel component 2 which is almost vertical when assembled to the vehicle body 1 is applied with a thick coating, there is no concern that the coating material will drip, and the sharpness can be improved.

Further, when dipping the vehicle body 1 in the painting / drying process PS, a jig for opening a door is not required, and work for attaching and detaching the jig is not required. It is possible to avoid the mutual interference between the vehicle body 1 and the outer plate component 2 in the process PS, improve the processability and the throwing power, and use the spray sealer agent by taking the best application posture during sealing. be able to. Moreover, when the vehicle body 1 is applied, the masking process is not necessary, and when the robot is used for the coating, it is not necessary to open and close the door and the like, the operation range of the robot is widened, and there is no risk of interference.

Further, as compared with the case where the coating / drying process PS is carried out with the outer plate component 2 assembled to the vehicle body 1, the installation due to the thermosetting reaction of the thermosetting adhesive in the coating / drying process PS No worries about defective products, joining process WS
Since the assembly adjustment, which was required twice between the assembly process MS and the assembly process MS, can be performed only once in the assembly process MS, and the curing reaction of the thermosetting adhesive can be performed independently in the coating / drying process. Distortion due to the mutual attraction of the vehicle body 1 and the outer plate component 2 does not occur, and assembly adjustment becomes easy. Moreover, in the assembling process MS, the vehicle body 1 can be easily fitted, and the outer plate component 2 can be prevented from being damaged during the fitting of the vehicle body 1. In addition, since the outer panel component 2 is also individually rigged, it is easy, and automation of rigging the vehicle body 1 and the outer panel component 2 is facilitated.

FIG. 2 shows a second embodiment of the present invention, in which parts corresponding to those of the first embodiment are designated by the same reference numerals. In this embodiment, in the painting / drying process PS, the vehicle body 1 and the outer plate component 2 which is in a substantially horizontal posture are separately processed. That is, the main line 3 and the sub line 4 include the pretreatment booths 5a and 5b and the draining and drying furnaces 6a and 6a.
b, the undercoat booths 7a and 7b, the drying ovens 8a and 8b, the sealer booths 9a and 9b, the drying ovens 10a and 10b, the overcoating booths 11a and 11b, and the drying ovens 12a and 12b.

According to the second embodiment, in addition to the effect of the first embodiment, the processing suitable for the shape of the outer plate component 2 can be performed, and particularly the pretreatment can be completely performed in detail. The outer plate component 2 due to the relatively small size of the component 2.
It is possible to save energy in the painting / drying process.

FIG. 3 shows a third embodiment of the present invention, in which parts corresponding to those of the first and second embodiments are designated by the same reference numerals. What should be noted in this embodiment is that the body main body 1 and the outer panel component 2 in a substantially horizontal posture are separately processed in the portions other than the top coating and final drying of the coating / drying process PS. That is, the main line 3 and the sub-line 4 include the pretreatment booths 5a and 5b, the draining and drying ovens 6a and 6b, the undercoating booths 7a and 7b, and the drying ovens 8a and 8b.
b, sealer booths 9a, 9b and drying ovens 10a, 1
Pass 0b individually.

By doing so, pretreatment for painting suitable for the shape of the outer plate component 2 can be achieved while saving energy, and since the top coating is the same, the vehicle body 1 and the outer plate component are made identical. It is possible to reliably prevent the difference in color appearance between 2 and 1.

[0019]

As described above, according to the method of the present invention, the outer panel parts that are joined to the vehicle body to form the vehicle body are separated from the vehicle body before the painting / drying process and are substantially level with the vehicle body. Since the outer panel parts that have been set in different postures are individually painted and dried in the painting and drying steps, and the outer panel parts are assembled to the vehicle body after the painting and drying steps, the outer panel parts can be attached to the vehicle body. Even if it is almost vertical, it is possible to prevent the paint from dripping, and to evenly coat any outer panel component to improve the clarity. Moreover, it is possible to coat outer panel components with a simple movement of the coating machine, and it is possible to automate coating of outer panel components with a simple device such as a reciprocator.

[Brief description of drawings]

FIG. 1 is a process drawing of a first embodiment of the present invention.

FIG. 2 is a process drawing of a second embodiment of the present invention.

FIG. 3 is a process drawing of a third embodiment of the present invention.

[Explanation of symbols]

 1 Body 2 PS parts PS painting / drying process

Claims (1)

[Claims] 1. An outer panel part (2) which is joined to a vehicle body (1) and constitutes a vehicle body is separated from the vehicle body (1) before a painting / drying step (PS), and the vehicle body (1) is separated. And the coating and drying process (P)
Painting / drying individually in S), and painting / drying process (P
A method of assembling an automobile, characterized in that after step S), the outer panel component (2) is assembled to the vehicle body (1).