JPS63268578A - Welding line device - Google Patents

Abstract

PURPOSE:To weld plural kinds of works at the same time with a single welding line by supplying a jig from a jig storage to each lifter table. CONSTITUTION:A first lifter table 6 descends and a first work W is received with a conveying line 1. Moreover, a second work W is set to the conveying line 1. The first and second works W are moved forward and transferred by the conveying line 1 and brought to a second lifter table and the first lifter table 6, respectively. The first work W is clamped by the jig 5 for the first work supplied from the storage 3 with the second lifter table 6. Moreover, with the first lifter table 6 on which the second work W has been conveyed, a jig stand 61 descends till a floor 31 of a lower stage of a storage 3 in which the jig 5 for the second work is stored and receives the jig 5 and ascends and the second work W is clamped by the jig 5. With the second table 6, a secondary welding is performed on the first work W by a robot 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a welding line apparatus for performing spot welding on continuously transported workpieces such as automobile panels.

[Prior Art] Conventionally, in this type of welding line, a plurality of welding machines are installed at predetermined intervals along the conveyance line, and these welding machines sequentially apply workpieces to predetermined locations on the workpieces being conveyed at predetermined intervals. A method is used in which the workpieces that have undergone welding are carried out after the entire welding process has been completed.

That is, welding machines that perform predetermined welding are arranged at predetermined intervals on the sides of the transport line, and jigs for holding workpieces are installed at predetermined intervals along the lower part of the transport line. A method is used in which workpieces transported by a transport line that advances and stops intermittently are sequentially clamped to a jig and welded to complete a large number of welding processes.

[Problems to be Solved by the Present Invention] However, in this method, when jigs of the same type are arranged and welding of the same type of workpieces held by these jigs is performed, the welding work can be carried out continuously and efficiently. be able to.

However, when the workpiece is changed, the jigs for the entire line must be replaced. Also, different types of work cannot be inserted.

Note that it is also possible to weld two types of workpieces in parallel by arranging two types of jigs alternately and conveying the corresponding two types of workpieces alternately, but if the line length is 2. It will double.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a welding line device that can appropriately weld a plurality of types of workpieces continuously without extending the line, thereby solving the problems of the conventional welding line.

[Means for Solving the Problems] As shown in the illustrated embodiment, the present invention has a welding machine 4 at a side along the conveyance line 1, which receives a signal and performs a predetermined welding on the workpiece W. Lifter tables 6 on which jigs 5 for removably holding workpieces W are placed are installed below the conveyance line 1 at the location where the welding machine is installed, and each lifter table 6 and A jig storage storage 3 capable of storing a plurality of jigs 5 is disposed on the opposite side thereof, and each storage 3 is provided with a jig storage storage 3 that can store a plurality of jigs 5. A jig moving means, for example, a roller 32, is provided to move the jig 5 corresponding to the work to the lifter table 6 to hold the work and return the jig 5 to the storage 3 after welding. Features.

[Operation and Effect] The work W transported at predetermined intervals is stopped at the lifter table 6. At this time, a jig 5 corresponding to the workpiece W is sent from the jig storage storage 3 to the lifter table 6 by the moving means 32, and the workpiece W is clamped on the jig 5. Then, the welding machine 4 receives a signal to perform predetermined welding on the workpiece W, and performs predetermined welding.

The welded workpiece W is transported to the next lid table 6. At the same time, the jig 5 for the workpiece W that has been welded returns to the storage 3. When the transported work W reaches the next lifter table 6, the corresponding jig 5 is sent from the next storage 3 to the lifter table 6 and clamps the work W.

In this way, in the present invention, jigs are supplied from the jig storage to each lifter table without fixing the jigs along the transport line, so multiple types of workpieces can be processed on a single welding line. can be welded at the same time.

Also, there is no need to extend the line length depending on the frequency of workpieces.

[Embodiment] In the embodiment shown in FIGS. 1 and 2, a conveyance line 1 consisting of a pair of rails supported by a support member 2 is set in the center. On both sides of the transport line 1, jig storages 3 are arranged at predetermined intervals along the transport line 1. A welding robot 4 is installed on each storage 3 as a welding means.
is installed.

Each storage 3 is provided with two floors 31, one above the other, and a workpiece holding jig 5 is movably placed on each floor 31. That is, a roller 32 serving as a jig moving means is provided on the floor 31 and is controlled to rotate in forward and reverse directions at appropriate times, and the jig 5 is placed on this roller 32 .

Lifter tables 6 are provided below the transport line 1 between the storages 3 facing each other with the line 1 in between.

The conveyance line 1 is comprised of a pair of rails, and is driven and controlled to move forward and backward by a distance corresponding to the distance between the welding robots.

The jig 5 has a clamper 52 protruding from a plate 51 to lock the workpiece W thereon. The number and position of the clampers 52 vary depending on the type of workpiece W to be clamped thereon. Thus, a plurality of types of jigs 5 corresponding to the types of workpieces W to be transported are prepared and placed on the floor of each storage 3, respectively.

Each lifter table 6 includes a jig stand 61 on which the jig 5 is placed;
It consists of a hydraulic cylinder 62 and a link 63 that support this. The jig stand 61 can be moved up and down by the operation of a hydraulic cylinder 62, and is controlled to move up and down in three stages: the top position where welding work is performed, the upper stage, and the lower floor 31. Jig stand 6
1 has rollers similar to those in storage 3 (not shown)
is internally installed, and the roller can be vertically controlled to a position above the surface of the jig table 61 and a position submerged from the surface of the jig table 61.

Each of the welding robots 4 receives a signal from a control device,
Welding is performed on the workpiece W according to the signal.

In the welding line apparatus constructed as described above, the workpiece W is set on the transport line 1, advances to the position of the first lid table 6, and stops.

The jig table 61 of the first glue table 6 is lowered to the level of the upper floor 31 of the storage 3 by the operation of a hydraulic cylinder 62, and the rollers 32 on the upper floor rotate to accommodate the first workpiece W. The first jig 5 is a jig stand 61
Move up. At this time, the rollers on the jig stand 61 are in the floating position, and the jig 5 from the storage 3 is introduced, and when the introduction is completed, the rollers sink, and the jig 5 is moved to the jig stand by a clamp mechanism (not shown). It is clamped at 61.

When the first workpiece W advances toward the first lifter table 6, the table 6 rises, and when the clamper 52 crosses the conveyance line 1, the workpiece W is received by the clamper 52 and clamped.

Next, the transport line 1 released from the first workpiece W moves backward. During this time, the first welding robot 4 receives a signal to perform welding at a predetermined location on the first workpiece W, and performs spot welding.

Next, the first lid table 6 is lowered and the first workpiece W is received on the conveyance line 1. Further, a second workpiece W is set on the transport line 1. The first and second works W are then transported forward by the transport line 1 and reach the second and first lid tables 6, respectively. The first workpiece W is then clamped to the first workpiece jig 5 supplied from the storage 3 on the second glue table 6. Furthermore, in the first lifter table 6 to which the second workpiece W has been transported, the jig table 61 has a storage 3 that stores the jig 5 for the second workpiece.
The jig 5 is lowered to the lower floor 31, and the jig 5 is received therein, and the jig 5 is ascended to clamp the second work W to the jig 5.

Therefore, the second welding is performed on the first work W by the welding robot 4 at the second glue table 6, and the first welding is performed on the second work W at the first glue table 6. It is done.

Thereafter, the third and fourth workpieces are sequentially fed, and each workpiece is sequentially welded on each lifter table, completing the entire welding process.

In the illustrated welding line, each lifter table has a structure in which four types of jigs can be supplied by storage, and therefore, 48 types of workpieces can be welded at the same time on one welding line. Furthermore, if the number of jigs stored in the storage is increased to accommodate a wider variety of jigs, it is possible to weld a wider variety of workpieces.

Of course, continuous welding of only one type of workpiece is also possible, and different workpieces can be interposed as necessary.

Therefore, when the present invention is applied to an automobile welding line, simultaneous production by different car companies is possible, and there is no need to modify the line when introducing a new car model. You can also run prototypes for testing, etc. In addition, fewer line modifications are required when changing to a new model.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view showing a part of a welding line device, and FIG. 2 is a front view of a lifter table. W... Work... Conveyance line

Claims (1)

[Claims] Welding machines that receive signals and perform predetermined welding on the workpieces are installed at predetermined intervals on the side of the workpiece conveyance line, and below the conveyance line, the workpieces are removably held at the welding machine installation location. Install a lifter table to place the jig,
A jig storage storage capable of storing a plurality of types of jigs corresponding to the types of workpieces to be transported is installed on the side facing each lifter table, and the workpieces are placed in the storage at the lifter table position. The present invention is characterized by comprising a jig moving means for moving a jig corresponding to the work to a lifter table to hold the work when the work is transported to the lifter table, and returning the jig to the storage after welding. Welding line equipment.