JPH0774015B2 - Car assembly method - Google Patents

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 a 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 an engine, tires, handles, and seats are assembled to the finished vehicle body 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, outer panel parts such as doors that are almost vertical will be painted while being affected by gravity. For this reason, in the base paint, there was a difference in the arrangement of the aluminum powder on the vertical plane and the horizontal plane, and there was a subtle difference in the appearance of the color. Further, 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. Also, even if it is not metallic coating, coating with the outer panel parts that are almost vertical planes attached to the body of the car body may cause the paint to drip, and the coating machine must 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 it is possible to improve the coating quality of outer panel parts of an automobile body , and to shorten and shorten the line length of the coating line.
An object of the present invention is to provide a method for assembling an automobile, which can contribute to reduction in processing time .

[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. Place, subjected to individual painting and drying in the painting and drying process and their vehicle body and the outer plate part and to assemble the outer panel components to the vehicle body after painting and drying course, the automobile
In the assembling method, the outer plate portion is used in the painting / drying step.
Items are transported while being held in a substantially horizontal position, and
At least one of a plurality of processing units for performing the drying process
Separated part of the car body processing and outer panel parts processing
Upright, and at least a part of the processing section,
It is characterized in that the parts are processed in parallel .

[0006]

[Work] The outer panel parts are in a substantially horizontal position during the painting and drying process.
Because it is held and transported, Outer panel parts to body
Even if it is almost vertical when assembled
Effectively prevent paint dripping, which skin
Even parts can be painted uniformly. Moreover, the painting machine
It is possible to paint outer panel parts with a simple movement.

Further, at least a part of the painting / drying step
In the processing part of the
Therefore, it is possible to reduce the processing time as a whole.
is there. Moreover, in at least some of the above processing units
Since it is not necessary to carry the body and the outer plate components in parallel,
Each processing unit is miniaturized in the carrying direction.

[0008]

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, manufacturing of an automobile body is performed by a pressing step, a joining step WS, a coating step The four steps of the drying step PS and the assembling step MS are sequentially performed, and the vehicle body 1 separately formed in the joining step WS, the door, the hood, and the like 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 painting / drying process PS, the process PS is carried out.
As a plurality of processing units to be carried out, a pretreatment booth 5, a draining drying oven 6, an undercoating booth 7, a drying oven 8, a sealer booth 9, a drying oven 10, an overcoating booth 11 and a drying oven 12 are provided. Are arranged in this order. Each processing unit is a car body
Separately separates the main body processing and the outer panel parts processing.
Both of them are installed side by side in the direction crossing the transport line.
It In each of the processing units, the body 1 and the outer plate component 2 are
Are processed individually. Therefore, the main line 3, the vehicle body dedicated to processing pretreatment booth 5a, draining drying oven 6a, undercoating booth 7a, drying oven 8a, sealer booth 9a, drying furnace 10a, sequentially passes through the topcoat booth 11a Contact and drying furnace 12a On the other hand, the sub-line 4 is the outer plate
Pretreatment booth 5b dedicated to component processing, draining and drying oven 6b, below
Coating booth 7b, drying oven 8b, sealer booth 9b, drying
Drying oven 10b, topcoat booth 11b and drying oven 12b
Pass sequentially .

In the assembling process 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 plates in the pressing step are assembled together by welding or thermosetting adhesive in the joining step WS, and the body of the vehicle body is assembled. 1 and the outer plate component 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 assembled correctly.

Next, in the painting / drying process PS, the vehicle body 1
Along the main line 3, pretreatment dedicated to the body processing
Booth 5a, draining and drying oven 6a, undercoat booth 7a, drying
Furnace 8a, sealer booth 9a, drying furnace 10a, top coat
Through the base 11a and the drying oven 12a, while the outer plate
Part 2 is along the sub-line 4 and is dedicated to the processing of outer plate parts
Treatment booth 5b, draining and drying oven 6b, undercoat booth 7b,
Drying oven 8b, sealer booth 9b, drying oven 10b, top coating
Since it passes through the Ri booth 11b and the drying furnace 12b sequentially,
The vehicle body 1 and the outer plate component 2 are individually coated. Moreover, the outer panel component 2 is placed in a substantially horizontal position during the coating / 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 progress of 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.

In such an automobile assembly, the outer plate component 2 in a substantially horizontal posture is painted and dried. Therefore, the coating of the outer plate component 2 is automated with a simple device such as a reciprocator as the best coating posture. It is possible to apply a uniform coating to any of the outer plate components 2, and it is possible to prevent a slight difference in color from occurring. Further, even if a slightly thick coating is applied to the outer panel component 2 which is almost vertical when assembled to the vehicle body 1, there is no fear of the coating material dripping, 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 or the like is not required, and work for mounting / removing 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 required, and when the robot is used for coating, it is not necessary to open and close the door and the like, which widens the operation range of the robot and eliminates the risk of interference.

Further, as compared with the case where the coating / drying process PS is performed with the outer panel component 2 attached to the vehicle body 1, the installation due to the thermosetting reaction of the thermosetting adhesive in the coating / drying process PS There is no fear of defects, and the joining process WS
Since the assembling adjustment which was required twice with the assembling process MS can be performed only once in the assembling process MS, and the curing reaction of the thermosetting adhesive can be performed independently in the painting / drying process, Distortion due to the mutual attraction of the vehicle body 1 and the outer plate component 2 does not occur, and the assembly adjustment becomes easy. Moreover, in the assembling process MS, the vehicle body 1 can be easily mounted, and the outer plate component 2 can be prevented from being damaged during the mounting of the vehicle body 1. In addition, since the outer panel component 2 is also individually rigged, it is easy, and automation of the rigging of the vehicle body 1 and the outer panel component 2 is facilitated.

[0017] Further, according to the embodiment, processing that matches the shape of the outer plate part 2 can and will in particular pretreatment to detail can be fully carried out, also due to the outer plate part 2 is relatively small It is possible to save energy in the coating / drying process of the outer panel component 2.

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. What should be noted in this embodiment is that the body main body 1 and the outer panel component 2 which is in a substantially horizontal posture are treated separately except for the top coating and final drying of the coating / drying process PS. That is, the main line 3 and the sub-line 4 are separated into a pretreatment booth 5a, 5b and a draining / drying furnace 6 which are separate and dedicated to the body body treatment and the outer plate component treatment, respectively.
a, 6b, undercoat booths 7a, 7b, drying ovens 8a, 8
b, sealer booths 9a, 9b and drying ovens 10a, 1
Pass 0b individually. And the vehicle body 1 and the outer plate component 2
Are the above-mentioned pretreatment booths 5a and 5b, and the draining and drying ovens 6a and 6
b, undercoat booth 7a, 7b, drying oven 8a, 8b, sea
Ra booths 9a, 9b and drying ovens 10a, 10b
After passing separately, common topcoat booth 11 and drying oven
Separately or alternately.

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.

[0020]

As described above, according to the method of the present invention, the outer panel component is separated from the vehicle body before the painting / drying process,
In the method of assembling an automobile, the car body and outer plate parts are individually painted and dried in the paint / drying process, and after the paint / dry process, the outer plate parts are assembled to the car body .
In the painting / drying process, the outer plate parts are in a substantially horizontal position.
Since the outer plate parts are held vertically and are transported , even if the outer plate parts are almost vertical when assembled to the vehicle body, it is possible to prevent the paint from dripping. It also enables uniform coating and high 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.

In order to execute the painting / drying process,
At least some of the multiple processing units are dedicated
Separately and exclusively for processing plate parts,
In the processing section, the body of the vehicle and the outer panel parts are processed in parallel.
Therefore, it is possible to reduce the processing time as a whole.
it can. Moreover the car body at the at least a portion of the processing section
Is it not necessary to carry the main body and outer plate components in parallel?
The size of each processing unit in the transport direction as much as possible.
It is possible to shorten the transfer line as a whole.
It

[Brief description of drawings]

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

[Figure 2] Ru process diagram der of a second embodiment of the present invention.

[Explanation of symbols]

1 vehicle body 2 outside plate parts 5 draining drying of drained drying furnace 6a car body dedicated to processing as a preprocessing booth 6 processor pretreatment booth 5b skin part dedicated to processing pretreatment booth 5a vehicle body dedicated to processing as a processing unit drying oven 8a vehicle body treatment dedicated drying oven as undercoating booth 7a car body dedicated to processing undercoating booth 7b skin part dedicated to processing undercoating booth 8 processor as draining drying furnace 7 processing of the furnace 6b skin part dedicated to processing 8b skin part dedicated to processing drying oven 9 sealer booth 9a vehicle body treatment drying furnace 10a car body treatment dedicated drying furnace 10a outside of a sealer booth 10 processor sealer booth 9b skin part dedicated to processing only as a processing unit topcoat booth 11a car body dedicated to processing topcoat booth 11b skins part dedicated to processing topcoat Bed as a dry furnace 11 processor of plate component processing only Scan 12 drying furnace 12a car body treatment dedicated drying furnace 12b skins part dedicated to processing drying furnace PS painting and drying process as a processing unit

Claims (1)

[Claims] 1. An outer panel component (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 these vehicle body (1) are ) And the outer panel component (2) are individually coated and dried in the coating and drying step (PS), and after the coating and drying step (PS), the outer panel component (2) is attached to the vehicle body (1). ) was to assemble in, self
In the method for assembling a moving vehicle, in the painting / drying step (PS), the outer plate component (2) is
A plurality of units for transporting while being held in a substantially horizontal position and for executing the painting / drying process (PS)
At least a part of the processing section (5-12) of the vehicle body processing
Dedicated (5a to 12a) and external plate component processing (5b to 12a)
b), and at least part of the processing unit (5
a-12a; 5b-12b), the vehicle body (1) and the outer plate
A method for assembling an automobile, characterized in that the parts (2) are processed in parallel .