JPS5940146Y2 - welding equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a welding device in which a plurality of torches are movably attached to a linear guide so that a straight welding line can be formed on a workpiece. The present invention relates to a welding device in which a torch mounted opposite to a linear guide is connected to a cable and the related linear movement of the torch can be performed by driving the cable.

Conventionally, in welding equipment equipped to allow multiple torches to move in a straight line, the linear drive device for the torches is a feeding mechanism using a screw shaft, or a trolley with drive wheels on a running rail. , a structure in which a torch was attached to this was common.

However, all of the above structures have the disadvantage of being complicated and increasing equipment costs, and when a single welding device is equipped with multiple torches, the same number of drive devices as torches are required, making the device larger. was there.

Furthermore, as shown in FIG. 3, a pair of independently operating torches A,
Conventionally, when downward welding is performed on the workpieces W and W using the torch B, the torches A and B have been moved up and down independently from the reference position O to the lower welding point X.

Therefore, if only one welding power source is connected to each torch A and B, its operation cycle is as shown in Figure 4a, in which the welding power source is used to first perform welding in the lowering process a of A. Then, while A is ascending, B is welded using a welding power source in a descending process a', and then B
A work step is required in which the holder returns to the reference position O at the rise b'.

As a result, it takes 3/2 of the actual time t for downward welding on both sides until completion of downward welding on each workpiece W, W, which has the disadvantage of poor work efficiency.

To deal with this, separate welding power sources are provided for torches A and B, and as shown in the operating cycle in Figure 4b, torches A and B are simultaneously lowered, a, a', and raised.
b' and simultaneously perform downward welding using a welding power source during the descending processes a and a', the work can be completed in the shortest time t.

However, the above embodiment has the disadvantage that the cost of the apparatus increases by the increase in the number of welding power sources.

In view of the problems of the welding device based on the above-mentioned conventional technology, the purpose of this invention is to provide a pair of linear guides with torches facing each other, and to move the two torches in relation to each other via a cable connecting the two torches. In this way, the present invention aims to provide an excellent welding device that eliminates the above-mentioned drawbacks.

The tank bottom of this invention, which meets the above purpose, has a torch installed opposite to the workpiece that travels in a straight line under light load by driving a cable connecting the torches, and the welding line is connected to the workpiece. In addition, the torches are moved in relation to each other so that when one torch is welding, the other torch is simultaneously moved, so that the base welding power source is transferred to both torches. The main purpose of this invention is to complete the welding work cycle in the shortest possible time even when the welding machines are used alternately, and to simplify the structure of the device.

Next, an embodiment of this invention will be described below based on the drawings.

Reference numeral 1 shown in FIG. 1 is a welding device of this invention, and its structure is such that an upper table 3 and a lower table 4 are provided on a frame 2, and a pair of guide shafts 5 and 6 are provided between 3 and 4.
has been erected.

The guide shafts 5, 6 are provided with torch stands 7, 7.
is attached so as to be slidable, and the torch bases 7, 7
Torches C and D are attached to the lower part of the
is equipped.

Further, the torch stands 7, 7 are prevented from rotating by guides 9, 9.

Reference numeral 10 designates a chain as a connecting cable, both ends of which are connected to each torch stand 7, 7, and are hung from a driving sprocket 11 and a driven sprocket 12 provided on the upper table 3. The sprocket 11 is connected to a motor 14 via a reduction gear 13.

The torches C and D are connected to a welding power source (not shown), and the length of the chino 10 is set so that the torches C and D are diagonal to the welding line. ing.

Further, 15 is a work setting mechanism, and both torches C and D
It is installed in the middle of the worktable 16 and is separated from the workpiece table 16 having a shape that allows the workpiece 17 to be set thereon, and workpiece fixing mechanisms 18 and 19 provided at the upper and lower parts thereof.

In the above configuration, the process of downward welding to the workpiece 17 will be explained. First, the workpiece 17 is set on the workpiece table 16, and each lever 20.21 of the fixing mechanism 18.19 is rotated so that the workpiece 17 is welded by the clamping body 22.23. Fix the workpiece.

Each torch has a torch support device 8. The welding part of each workpiece is brought into contact with the welding part and fixed appropriately.

Thus, the driving sprocket 11 is driven by the motor 14.
As the torches are rotated clockwise and counterclockwise, each torch C and D move up and down in relation to each other, and the torches C and D form welding lines α and β in the figure. C,
The weight of D and the weight of the torch stand 7.7 act in the same manner as when the weight G is suspended as shown in FIG. 2, and appropriate tension is applied to the chino 10.

To weld, first, as shown in Fig. 2, the torch C is at the reference position O and the torch D is at the lower welding point Rotate.

At this time, the welding power source is connected to torch C, and welding line α
, and the torch D moves and rises to the reference position O b'.

Next, the welding power source connection of the torch is switched from C to D, and the drive sprocket is rotated in the opposite direction to the above rotation direction.

This operation forms a welded portion β and returns to the initial position.

That is, as shown in the cycle diagram in Fig. 4c, even if there is only one welding power source, two workpieces can be welded downward by raising and lowering each torch C and D once. As shown below, the fourth welding power source when using two conventional welding power sources
The welding work is completed in the same cycle as shown in Figure b.

Note that the embodiment of this invention is not limited to the above-mentioned aspect, and other aspects of design are possible. For example, as shown in FIG. 5, a pair of torch stands 7 attached to a guide shaft
', 7' to two cables 10'.

10", one drive sprocket 11
' and three driven sprockets 12', 12', 1
2' will prevent the torch from sticking, and if the torch bases 7' and 7' are arranged so as to be movable laterally as shown in Fig. 6, the horizontal welding line α'' will be reduced. , β' can be formed, and by setting the trajectory of the torch in an inclined direction, it is possible to draw an inclined weld line.

Incidentally, it goes without saying that the cable may be made of steel wire instead of only a chino wire.

As described above, according to this invention, in a welding device in which a plurality of torches are movably attached to a linear guide, each pair of torches are connected by a cable, and the torches are connected to each other by a cable, and the torches are connected to each other by a cable, and the torches are connected to each other by a cable. Since the torches are moved in a related manner, the driving force is small due to the balanced action of both torches in the pair, and the rotating device has a small capacity, which has the effect of reducing the size and cost of the device. Moreover, since the torch running section has a simpler structure than the conventional screw shaft type, the apparatus is simplified and failures are reduced.

Further, even if only one welding power source is used to operate the torch, the operating cycle can be completed in the shortest possible time as in the case of conventional multiple power sources, so there is an advantage that the required power can be saved.

Furthermore, since the pair of torches move in relation to each other, welding can be performed on two wires under the same conditions, which has the additional benefit of making welding quality constant.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is an overall view of the device, FIG. 2 is an explanatory diagram of the operation of the device, FIG. 3 is an explanatory diagram of the operation of the prior art, and FIGS. 4a and 4b are diagrams of the prior art. FIG. 4C is an explanatory diagram of the operating cycle of the apparatus of this invention, and FIG. 5-6 is an explanatory diagram corresponding to FIG. 2 of another embodiment. A, B, C, D...Torch, 5...
・Linear guide, 10, 10', 10''... Cable, 13.14... Rotating device, 11, 11
'... Drive pulley, 15... Work set mechanism.

Claims (1)

[Scope of utility model registration request] In a welding device in which a plurality of torches are attached to a linear guide so as to be movable, the torches are attached to each pair of linear guides facing each other, and both torches are connected by a cable, and the cable is rotated. 1. A welding device, the welding device being hung on a plurality of pulleys connected to a moving device, and having a work setting mechanism between the opposing torches.