JP2000272560A - Production line for body component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently manufacture a pair of body components in a short line at the same time, and enhance product quality. SOLUTION: This line is a production line for manufacturing a pair of left and right front doors LD, RD supplied to the same body in the case of weld- assembling a white body, plural temporal panel-laying tables 10 and temporal laying tables 11 for laying left and right door panels LDP, RDP are arranged in a midway of the line, a material handling robot 6A is provided to convey the door panels LDP, RDP while grasping them between the adjacent temporal panel laying table 10 and temporal laying table 11, and a stationary gun 12 for machining the door panels LDP, RDP grasped by the robot 6A is juxtaposed on a conveying locus of the robot 6A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production line for vehicle body components, and more particularly to a production line for vehicle body components for welding and assembling vehicle doors.

[0002]

2. Description of the Related Art Conventionally, when assembling a vehicle body, specifically, when assembling a white body by welding before entering a painting process, it is necessary to simultaneously supply each body component constituting the white body. Compared with large parts such as the body side assembly and floor assembly among body components, for example, body components such as front doors and rear doors require more steps when sub-assembled, and the left and right In general, they are manufactured on separate lines on the left and right because they are molded on the contrary. Specifically, the front door will be described as an example.The front door has a door panel as an inner member, a door skin as an outer member, a door sash member, a door hinge reinforcing member, and the like. It is a member that is often noticeable as a vehicle body outer panel member like other vehicle body constituent members, and requires high dimensional accuracy because of forming a parting line with a body side assembly. In addition, a large number of welding steps are required, such as combining a door skin with a door panel, hemming the periphery of the door skin, and welding the two together.

[0003]

However, despite the fact that the number of manufacturing steps is the same as the front door or rear door, the vehicle body components requiring a large number of manufacturing steps and requiring high product accuracy are separated into left and right parts. For example, when manufacturing in a line, the same processing machine needs to be used repeatedly. For this reason, there is a problem in that the line length becomes longer and space saving is countered. Conventionally, conveyors are often used to convey workpieces in door manufacturing lines such as those described above.However, in lines using such conveyors, workpieces are transported to the next stage and then processed. In addition, there is a problem that the transfer time is a loss time in which processing does not proceed as it is, and the manufacturing efficiency is poor. In order to solve such problems, it is possible to increase the transfer speed of the line, but it is easy to damage the outer surface of the body components that greatly affect the appearance quality, the yield is worse, and the quality control is difficult, There is also a problem that it becomes. Accordingly, the present invention is to provide a production line for a vehicle body component which can efficiently manufacture a pair of vehicle body components simultaneously on a short line and improve product quality.

[0004]

In order to solve the above-mentioned problems, the invention described in claim 1 is directed to a pair of left and right vehicle body components supplied to the same vehicle body at the time of welding and assembling a white body. Left and right front doors L in form
D, RD), and two types of works (for example, left and right door panels LDP, RDP or left and right door skins LDS, LDS,
A robot (e.g., a robot (e.g., RDS)) that arranges a plurality of temporary placing tables (e.g., the work input device 3, the panel temporary placing table 10, etc.) in which the workpieces can be placed between adjacent temporary placing tables. , A material handling robot 6 or the like in the embodiment), and a processing machine (for example, the welding robot 4A or the stationary gun 7 in the embodiment) for processing a work held by the robot is arranged side by side on a transfer locus of the robot. It is characterized by.

[0005] With this configuration, during the transfer by the robot, the processing by the processing machine arranged on the transfer locus of the robot can be performed, so that the time during the transfer can be effectively used as the processing time. For example, if processing is performed by a processing machine arranged on the transport trajectory while rotating the robot between adjacent temporary placing tables, space can be saved by effectively utilizing the rotation operation of the robot. The length can be shortened. Also, unlike a belt conveyor or the like, the work can be transferred by a robot without exposing the work to contact with other members and without damage. Since the transfer operation by the robot can be performed in a software manner by teaching, it is possible to flexibly cope with a model change.

According to a second aspect of the present invention, the vehicle body component is a front door or a rear door. With this configuration, it is possible to reduce the frequency with which the outer surfaces of the front door or the rear door, which are the vehicle body outer panel members, are exposed to the state of contact with other members.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. First, the flow of the entire line will be schematically described. FIG. 1 shows a front door welding assembly manufacturing line. A pair of left and right front doors L manufactured by this front door welding assembly line
D and RD are supplied to a not-shown white body welding assembly process.

In the above-mentioned production line, a work temporary attaching step A, an additional punching step B, a marriage step C, a door skin loading sealing step D, a hemming step E, a hemming dispensing step F, and a hinge mounting dispensing step G are arranged almost in series. In this line, the left and right front doors LD and RD are manufactured at the same time, specifically, at the same timing. First, the hinge mounting part reinforcing member DH and the door sash member DSH which are separately input are positioned on the left door panel LDP and the right door panel RDP alternately input to the work temporary mounting process A by the worker S for temporary mounting. Perform welding. Here, the left and right door panels LDP and RDP are panel materials on the inner side of a door that constitutes a door assembly DA together with a door skin DS described later.

Next, the left and right door panels LDP and RDP conveyed to the additional punching step B are subjected to additional tapping to increase the number of welding points, and are conveyed to the marriage step C. While the door panels DP are conveyed in this manner, in the door skin input sealing step D, the left and right door skins LDS and RDS constituting the outside of the sealed door are alternately conveyed to the marriage step C. Then, in the marriage process C, the door skin DS and the door panel DP are overlapped, and the left and right door assemblies DA are assembled.

The left and right door assemblies DA assembled in the marriage process C are alternately transported to the hemming process E, where the periphery of the door skin DS is hemmed, and alternately transported to the hemming dispensing process F, where the hemming process is performed. The subsequent welding is performed and transported to the hinge mounting and dispensing process G. In the hinge mounting and dispensing process G, door hinges (not shown) are attached to the left and right door assemblies DA, and the left and right door assemblies DA are dispensed from the hinge mounting and dispensing process G as a left front door LD and a right front door. Is done.

Next, each of the above steps will be described in detail with reference to FIGS. "Work temporary attachment process A"
As shown in FIG. 2, a work input device 3 having a set jig 2 on which a left and right door panels LDP and RDS can be placed is disposed on a turntable 1. The work input device 3 rotates the turntable 1 which can be directed to the worker S, so that the worker S alternately turns the left door panel L
DS and the right door panel RDS can be inserted.

A hinge mounting portion reinforcing member DH and a door sash member DSH are separately charged into the set jig 2 of the work input device 3, and are positioned with respect to each door panel DP. The hinge attachment part reinforcing member DH and the door sash member DSH are tack-welded to the left and right door panels LDP, RDP by a welding device not to be used. Welding robots 4 on both sides of the work input device 3,
The welding robots 4 and 4A perform welding on the door panel DP gripped by the material handling robot 6 in the additional punching process B described later.

Therefore, the left door panel LDP and the right door panel RDP are loaded into a single work loading device 3 by one worker S and are temporarily attached. While the door panel DP thus temporarily attached is being welded to one of the door panels DP by the welding robots 4 and 4A, the other door panel DP that has been welded is removed from the set jig 2 by the material handling robot 6. It is carried out. When the door panel DP is carried out from the set jig 2 in this way, a new left door panel LDP or new right door panel RDP is loaded into the work loading device 3.
Therefore, by welding one door panel DP while the other door panel DP is being conveyed, the hinge mounting part reinforcing member DH and the door sash member DSH are temporarily attached to the left and right door panels LDP, RDP without time loss. can do. Further, only one work input device 3 is required, and only one worker S is required.

"Additional beat process B"
A pair of material handling robots 6 shown in FIG. 3 are arranged on both sides of the line, and a stationary gun 7 shown in FIG. Here, the material handling robot 6 (the same applies to each robot described later).
Is a structure in which an arm is turned around a base, but this arm can increase the turning radius by extending a joint. Reference numeral 8 denotes a dresser of the stationary gun 7.
FIG. 6 shows a robot hand jig magazine 9 for the material handling robot 6, in which jigs for left and right door panels LDP and RDP and jigs for different types of door panels are placed. On the carry-out side of the stationary gun 7, a pair of panel temporary placing stands 10 shown in FIG. 4 for placing the left and right door panels DP additionally struck by the stationary gun 7 are arranged on both sides of the line. Here, the setting jig 2, the stationary gun 7, and the panel temporary placing table 1 in the work temporary attaching step A are described.
Numeral 0 is arranged on the transport trajectory of the material handling robot 6, and the welding operation is performed during the arm turning operation of the material handling robot 6. Therefore, as compared with the case where the door panel DP is simply transferred from the set jig 2 to the panel temporary placing table 10 by the robot, the stationary gun 7 is not transferred during the transfer.
As a result, the loss time during transportation for the welding operation can be effectively used, the production efficiency can be improved, and the line length can be shortened.

On the carry-out side of the panel temporary placing table 10, a temporary placing table 11 having substantially the same configuration as that of FIG. A material handling robot 6A having the same configuration as that of FIG. 3 is disposed on the unloading side of the temporary placing table 11 on the left and right of the line, and a stationary gun 12 for additional driving shown in FIG. Are located.
Therefore, the left and right door panels DP placed on the panel temporary placing table 10 in the previous process are subjected to additional punching and processing while being held by the material handling robots 6A, and are set on the temporary placing table 11. The material hand robot 6A is also provided with a robot hand jig magazine 9A similar to the robot hand jig magazine 9 shown in FIG.

Therefore, when one door panel DP is being subjected to additional stamping, the other door panel DP is placed on the temporary placing stand 11, and when the other door panel DP is transported to the next step, the one door panel DP is moved to the next stage. DP is temporary table 11
It is to be placed on. Therefore, using the transfer time of one door panel DP, the other door panel DP
Are mounted, so that only one temporary placing table 11 is required. Here, the panel temporary placing table 10 and the temporary placing table 11 are arranged at a position close to each other and have a short transport length, but the door panel DP is substantially transferred from the panel temporary placing table 10 to the temporary placing table 11. During the transfer, the above-described processing is performed on the transport trajectory of the material handling robot 6A, so that the processing of the door panel DP can be performed using the transport time and with a short transport distance, and space can be saved. be able to.

"Marriage Step C" In the marriage step C,
The marriage robot 14 shown in FIG. 7 is arranged. The marriage robot 14 places the left or right door panel DP set on the temporary placing table 11 in the previous process on the left and right placing portions 16A and 16B of the marriage table 16 via the sealing gun 15 shown in FIG. Things.

Therefore, the temporary placing table 11, the sealing gun 15, and the marriage table 16 are arranged on the transportation locus of the marriage robot 14, and the door panel DP on the temporary placing table 11 is held by the marriage robot 14. ,
While the marriage robot 14 rotates, a sealing material is applied to a necessary portion by a sealing gun 15 shown in FIG. Therefore, even in this step, the sealing material can be applied to the door panel DP gripped by the marriage robot 14 during the transfer within the short transfer distance between the temporary placing table 11 and the marriage table 16, and the space can be saved. It can contribute to the conversion. Here, at the left and right placement positions 16A and 16B of the marriage table 16, door skins DS transported from a door skin loading sealing step D described later prior to the door panel DP are alternately placed.

"Door skin input sealing step D" In the door skin input sealing step D, the door skin DP is alternately supplied to the marriage table 16 from the direction perpendicular to the line, and the door panel DP is placed on the marriage table 16. The door skin DS is to be placed prior to being performed.

FIG. 9 shows a door skin loading sealing step D.
10, a material handling robot 19 shown in FIG. 10 for gripping the door skin DS of the positioning device 18, and a sealing material applied to the door skin DS while being gripped by the material handling robot 19 shown in FIG. A sealing unit 20 is provided. The material handling robot 19 transports the door skin DS having the sealing material applied to the marriage base 16 and places the left and right door skins LDS, RD on the marriage base 16 prior to the door panel DP.
S are placed on each of them. Note that the positioning device 18 can slide on the base 18A to convey the door skin DS toward the center of the line.

Therefore, the positioning device 18, the sealing unit 20, and the marriage table 16 are arranged on the transport locus of the material handling robot 19, and the material handling robot 19
The necessary processing is performed on the door skin DS by one arm turning operation, and the door skin DS is placed at the placement positions 16A and 16B of the marriage base 16. Therefore, the occupied space can be reduced also in this step.

The left and right door assemblies DA assembled on the carry-out side of the marriage table 16 are connected to the marriage table 16.
The hemming robot 21 shown in FIG. 12 is arranged to transfer the hemming robot 21 to the next hemming step E. Can be slid on the bed 21A. Here, since the hemming process takes a certain amount of time due to its nature, since the single hemming input robot 21 performs the input to the hemming press device 22 alternately left and right, two hemming input robots 21 are arranged. There is no waste compared to the case.

"Hemming step E" In the hemming step E,
A hemming press device 22 shown in FIG. 13 is provided. The hemming press device 22 has two pillars 23 on the input side and one pillar 23 on the payout side at the center of the line, and has a hemming mold 24 on which the left and right door assemblies DA are placed. Hemming mold 2 for replacement
5 can be supplied orthogonal to the line. The loading side is the two hems 23 as the hemming loading robot 2
In order to correspond to the moving range of 1, the entrance space of the door assembly DA whose marriage has been completed is secured, and the unloading side has one pillar 23.
This facilitates the distributing arrangement of the two hemming dispensing robots 26 in the hemming dispensing process F described later, and also facilitates the unloading by securing the turning range of the robot arm and expanding the dispensing space. By this hemming process E, the door skin D is formed on the periphery of the door panel DP.
The rim of S is hemmed and the left and right door assemblies DA
Are integrated.

[Hemming Dispensing Step F] The hemming dispensing step F includes, as shown in FIG. 14, left and right door assemblies D processed by the hemming press device 22.
A is provided with two hemming payout robots 26 for paying out A respectively. An indirect welding apparatus 27 shown in FIG. 15, an additional spot gun 29 and a tip dresser 30 shown in FIG. 16, and a temporary placing table 31 shown in FIG. I have. Accordingly, the door assembly DA gripped by the hemming dispensing robot 26 is subjected to welding by the indirect welding device 27 and additional striking by the additional spot gun 29 in one arm turning operation of the hemming dispensing robot 26 and temporarily placed. It is placed on the table 31. ing. In the hemming dispensing step F, the robot hand jig magazine 9B of the hemming dispensing robot 26 having the same configuration as that of FIG.

The left and right door assemblies DA conveyed to the temporary placing tables 31 by the respective hemming dispensing robots 26 are gripped by a material handling robot 34 in a hinge mounting and dispensing process G, which will be described later.
MIG welding is performed by the G welding device 33, and the resultant is transported to the hinge mounting and dispensing process G which is the next process. Therefore, with the temporary placing table 31 interposed therebetween, the indirect welding device 27, the additional punching gun 29, and the MIG welding device disposed on the transport trajectory of the material handling robot 34 disposed on the transport trajectory of the hemming dispensing robot 26. 33 can be performed during transportation, and the transportation path can be shortened to reduce the occupied space.

"Hinge mounting and dispensing step G" In the hinge mounting and dispensing step G, as shown in FIG. 19, a pair of material handling robots 34 holding the door assembly DA is provided. It should be noted that the robot hand jig magazine 9C of the material handling robot 34 having the same configuration as that of FIG. As shown in FIG. 20, a pair of hinge mounting devices 35 for fastening the hinge of the door assembly DA gripped by the material handling robot 34 are arranged on the unloading side of the material handling robot 34. When the hinge is attached to a predetermined position of the door assembly DA by the hinge attaching device 35, and the hinge is tightened to the door assembly DA by the nut runner in the hinge attaching device 35, the door assembly DA works via the work discharging unit 36. Is paid out of the line by the worker S and transported to a white body assembly line (not shown).

Therefore, according to the above-described embodiment, for example, the welding robot 4A and the stationary gun 7 arranged on the transport trajectory while turning the material handling robot 6 between the adjacent work input device 3 and the panel temporary placing table 10. Therefore, space saving can be achieved by utilizing the arm turning operation of the material handling robot 6, and the line length can be shortened. In other words, the robot's arm rotation range is a dead space from the grounds of safety, so placing each processing machine here will save a large amount of space compared to when it is placed elsewhere. It can be reduced.

Further, during the transfer by each robot, the processing can be performed by the various processing machines arranged on the transfer locus of the robot, so that the time during the transfer can be effectively used as the processing time, so that the production efficiency can be improved. Can be improved. Further, since the door panel DP and the like can be transported by each robot, the frequency of the door panel DP and the like being exposed to contact with other members is reduced as compared with the transport by the conveyor, and therefore, the door panel DP and the like are hardly damaged and the product quality is reduced. Can be increased. In addition, the transfer operation by each robot can be changed in a software manner by teaching, so that it is possible to easily deal with a model change.

In addition, according to this embodiment, the door assemblies DA of the left and right front doors can be manufactured simultaneously on a single line, that is, at the same timing. Therefore, the left and right door assemblies DA of the front door can be simultaneously supplied to the white body assembly line. Further, the work input device 3 in the work temporary attaching process A, the temporary placing table 11 in the additional punching process B, and the hemming input robot 2 in the door skin input sealing process D.
Since 1 is used for the left and right door panels DP, the equipment cost can be significantly reduced as compared with the case where two doors are used.

When processing or the like is performed by each of these single facilities, as described above, for example, processing is performed on one door panel DP while the other door panel DP is being processed. In this case, the transfer time, which is simply a lost time, can be effectively used as a processing time for another door panel DP or the like, so that the manufacturing time can be shortened and a great result can be obtained in terms of work efficiency. Therefore, the number of workers can be reduced. Also,
As shown in the work input device 3, the work for inputting the work which takes twice as much time as alternately inputting the left and right door panels DP is replaced with the welding temporary attachment work for the door panel DP which requires a certain amount of time for the work. By doing so, work can be performed without any loss time.

Since a pair of front doors can be manufactured at the same time, compared with a case where two lines are manufactured,
There is no need for complicated work such as matching the two lines. In addition, since the jigs and the dies and the like are managed under the same conditions on the left and right, it is easy to control the accuracy of these jigs and the like, and it is possible to manufacture high quality products with the same quality on the left and right. When the model is changed, it is only necessary to change the jig, the work gripping fingers of various robots, the marriage type, and the hemming die. Therefore, there is versatility that can flexibly cope with many types of vehicles and small-quantity production. In addition, this invention is not limited to the said embodiment, For example, it can be applied also to manufacture of a front door. In the above embodiment, the sash portion is welded to the door panel as a separate component. However, the present invention can be applied to a full door type door in which the sash portion is formed integrally with the door panel or the like.

[0032]

As described above, according to the first aspect of the present invention, since the transfer can be performed by the processing machine arranged on the transfer locus of the robot, the time during the transfer can be effectively reduced. Since it can be used as a processing time, there is an effect that the production efficiency can be improved and the line length can be shortened. Further, since the workpiece can be transported by the robot without damaging the workpiece, there is an effect that the product quality can be improved as compared with the case where a conveyor is used. Since the transfer operation by the robot can be changed in a software manner by teaching, it is possible to easily cope with a model change, and there is an effect that the start-up time of a line at the time of step change for a different kind of work can be greatly reduced. .

According to the second aspect of the present invention, the outer surface of the front door or the rear door is in contact with another member by adopting the transfer by the robot as compared with the case where the transfer is performed by a conveyor such as a belt conveyor. Since the frequency of exposure to the panel is reduced, it is possible to prevent the outer surface of the panel from being damaged and to improve the appearance quality.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is a perspective view of a work input device.

FIG. 3 is a perspective view of the material handling robot.

FIG. 4 is a perspective view of a temporary panel mounting table.

FIG. 5 is a perspective view of a stationary gun and a dresser.

FIG. 6 is a perspective view of a robot hand jig magazine.

FIG. 7 is a perspective view of the marriage robot.

FIG. 8 is a perspective view of a sealing gun.

FIG. 9 is a perspective view of a positioning device.

FIG. 10 is a perspective view of the material handling robot.

FIG. 11 is a perspective view of a sealing unit.

FIG. 12 is a perspective view of a hemming input robot.

FIG. 13 is a perspective view of a hemming press device.

FIG. 14 is a perspective view of a hemming payout robot.

FIG. 15 is a perspective view of an indirect welding device.

FIG. 16 is a perspective view of an additional spot gun and a tip dresser.

FIG. 17 is a perspective view of a temporary placing table.

FIG. 18 is a perspective view of a MIG welding device.

FIG. 19 is a perspective view of the material handling robot.

FIG. 20 is a perspective view of a hinge attachment device.

FIG. 21 is a perspective view of a work payout unit.

[Explanation of symbols]

 2 Set jig (temporary placing table) 6 Material handling robot (robot) 4A Welding robot (processing machine) 6A Material handling robot (robot) 7 Stationary gun (processing machine) 10 Panel temporary placing table (temporary placing table) 11 Temporary placing table (temporary placing table) Temporary placing table) 12 Stationary gun (processing machine) 14 Marriage robot (robot) 16 Marriage table (temporary placing table) 18 Positioning device (temporary placing table) 19 Material handling robot (robot) 20 Seal unit (processing machine) 26 Hemming dispensing robot (Robot) 27 Indirect welding equipment (Processing machine) 29 Additional spot gun (Processing machine) 31 Temporary placing table (Temporary placing table) 33 MIG welding apparatus (Processing machine) LD, RD Left and right front doors (Body components) LDP, RDP Left and right door panels (work) LDS, RDS Left and right door skins (work)

Claims (2)

[Claims] 1. A line for manufacturing a pair of left and right body components to be supplied to the same vehicle body when welding and assembling a white body, and a plurality of temporary placing tables on which two types of works can be arranged in the middle of the line. A vehicle body provided with a robot that arranges and transports a workpiece while gripping the workpiece between adjacent temporary placing tables, and a processing machine that processes the workpiece gripped by the robot is arranged side by side on a transport locus of the robot; Component parts production line. 2. The production line according to claim 1, wherein the vehicle body component is a front door or a rear door.