JPH0710868Y2 - Automatic welding equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention welds an object to be welded while running a self-propelled carriage equipped with a welding machine using a wire rope stretched along a welding line as a guide. Related to automatic welding equipment.

[Conventional technology]

Conventionally, there is known a method in which a welding machine is mounted on a carriage and welding is performed while moving the carriage along a welding line. For example, Japanese Utility Model Publication No. 60-25333 (conventional example 1) and Japanese Patent Laid-Open No. 62-2
This is an automatic welding device described in Japanese Patent No. 63898 (Conventional Example 2).

FIG. 5 illustrates the device of Conventional Example 2. In order to allow the carriage 30 holding the welding torch 35a to travel on a fixed track along the welding line, a rail 31 for guiding the travel of the carriage 30 is used.
Is laid near the weld line. This rail 31 is laid by the operator carrying it to the position of the welding line and attaching it to the steel plate 32 which is the object to be welded, for example, via a magnet. In this conventional example, the wire rope 34 is retracted by the drive source 33 so that the carriage 30 travels together with the welding wire reel 35. In the figure, 31A is a rail processed into a shape that matches the curved surface of the steel plate 32.

In each of the above-mentioned conventional examples 1 and 2, the structure is such that the bogie is towed by the wire rope and guided and moved on the rail.
In addition, a self-propelled trolley in which a rack is provided on a rail and a pinion of a drive motor provided on the trolley is meshed with the rack to drive the trolley to travel is also known.

[Problems to be solved by the device]

The following disadvantages are pointed out in the above-mentioned conventional examples 1 and 2.

The rail length is usually about 1 m, and it is necessary to add the rails according to the traveling of the bogie.If the welding length is long, the rail laying work becomes very troublesome and heavy labor, and sometimes the arc is temporarily added during the addition work. Since it may be cut, the arc time may be shortened and work efficiency may be deteriorated.

Since it is necessary to lay the rail at a predetermined position along the welding line, it takes time to align the rail, and if its accuracy is poor, it may lead to welding defects.

When used for vertical welding, there is a great risk of rail drop.

When transporting the rail to the welding location, the magnet is heavy and it is hard to carry around.

If the object to be welded has a curved surface, in order to perform welding along the welding line, a curved rail that fits the curved surface must be prepared (see rail 31A in FIG. 5).

Therefore, in view of the problems of the prior art, the present invention stretches a wire rope along the welding line, which should serve as a guide rail for the carriage, and uses the wire rope as a guide and for traveling to travel the carriage and weld it. The purpose is to improve work efficiency and save labor.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the automatic welding apparatus of the present invention is an automatic welding apparatus having a self-propelled carriage equipped with a welding machine and traveling along a welding line. While installing a pulley and providing a sheave at least at the front of the bogie, a wire rope to be a traveling guide track of the bogie is stretched along a welding line, and further, after the wire rope is laid over the sheave, It is characterized in that it is guided to a drive pulley and wound around the drive pulley so as to be guided rearward so that the carriage can travel while being guided by the wire rope.

Further, in this configuration, the wire rope is stretched almost directly above the welding line, the welding machine is mounted on the bogie main body, and the guide traveling wheel is provided at the front portion of the bogie so as to be vertically movable. The welding torch of the welding machine is arranged on the same line as above, and the guide traveling wheel is made to travel on the welding line to perform welding.

[Action]

In the structure according to claim 1, the wire rope is stretched along the welding line before the start of welding, but the wire rope itself is lightweight and easy to handle. Further, since it can be bent freely, it can be easily followed even if the welding surface is a curved surface, so that the tensioning operation is easy. After the wire rope is installed on the carriage, when the carriage drive drive motor is operated, the carriage is guided by the wire rope so that the wire rope is pulled by the drive pulley. Then, welding along the welding line can be performed by the welding machine mounted on the carriage.

Further, in the case of the second aspect, when the guide traveling wheel is dropped in the welding groove which is the welding line for traveling, the welding torch also runs on this welding line and welding can be performed.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of an automatic welding apparatus according to a first embodiment of the present invention, and FIGS. 2 (a), (b) and (c) are a plan view, a side view and a front view, respectively.

As shown in FIG. 1, along the welding (planned) line 2 of the work piece 1, the wire rope 3
If the welding surface is a curved line in advance, the wire rope 3 will hit the surface, and if it is a straight line, it will be stretched slightly above the surface (below the sheave described below) and guided along this wire rope 3. While being carried out, the carriage 4 of the automatic welding apparatus A is adapted to travel. A carriage drive motor 5 is mounted on the carriage 4, and a welding control box 6 and a motor control box 7 are mounted before and after the drive motor 5. A supporting arm 8 is horizontally projected from the front part of the welding control box 6 and a supporting rod 9 is vertically provided at an end of the supporting arm 8 in the vertical direction. This support rod 9
Weaving device 11 holding welding torch 10 at the end of
Is supported, which constitutes a welding machine. The weaving device 11 is configured to be capable of welding while swinging the welding torch 10 left and right with respect to the welding line 2.

As described above, in the first embodiment, the position of the welding torch 10 gripped by the torch presser 10a attached to the weaving device 11 is provided at a position protruding from the carriage 4, and at this position, the support arm 8 is adjusted to the left and right adjusting knobs 8a. It can be adjusted by operating. Further, the vertical adjustment can also be adjusted by operating the adjustment knob 9a (FIG. 2 (a)) of the support rod 9 to move it up and down. In addition, 12 is a running wheel provided at the lower four corners of the truck, 13 is a welding wire wire, 14 is a cap tire cord for power supply, and 15 is installed between the welding control box 6 and the weaving device 11. It is an electric wire.

A more detailed description will be given with reference to FIGS.
The drive motor 5 is a cart 4 formed in a rectangular plate shape in a vertical direction.
A drive pulley 15 is provided on the lower end of the drive shaft 4a. An AC motor is used as the drive motor 5, has a continuously variable transmission function, and the welding speed can be controlled by changing the traveling speed of the carriage 4. In addition, sheave mounting members are provided on the front and rear of the carriage 4.
16a and 17b are provided in a protruding manner, and a pair of sheaves 16 and 17 are arranged on each. The pair of sheaves 16 and 17 are arranged with a vertical step so that there is no support for the traveling of the carriage 4 even in the case of vertical welding in which the welding line runs on a vertical surface. That is, when the bogie 4 passes, the upper sheave 16 pushes up the wire rope 3 and the reaction force of the wire rope 3 generated by the upper sheave 16 pushes the bogie 4 together with the traveling wheels 12 against the welding surface. It can be welded. 2 (b) shows this wire rope 3
It is a side view which showed the guide way of [2] transparently. The wire rope 3 is guided through the upper sheave 16 through the lower sheave 16 into a substantially S-shape, is guided to the drive pulley 15, is wound once here, and is then guided to the rear sheave 17 again. Again, it is guided in a substantially S shape and extends rearward. The sheave may be only on the front side of the trolley (that is, only the sheave 16).

Thus, when the drive pulley 15 is rotated by operating the drive motor 5, the drive pulley 15 winds the wire rope 3 and unwinds it at the same time, while the carriage 4 pulls the wire rope 3 at the same time. It is designed to run under the guidance of 3. The wire rope 3 is stretched in the vicinity of the planned welding line in advance, but since the wire rope 3 itself is lightweight, it is easy to handle and has a long welding line in the vertical direction unlike conventional rails. Even if it is a welding line running on a straight line or a welding line with a curved surface, it can be easily dealt with without the need to bend the rail as in the past, and attach a chain block to the tip to give an appropriate tension. It should be set up.

FIGS. 3A to 3C show a side view, a plan view and a front view of an automatic welding apparatus B according to the second embodiment. The same components as those in the first embodiment are designated by the same reference numerals.

Traveling wheels 12 are arranged at four corners of the box-shaped bogie 4, and a rectangular opening 18 is provided at a substantially central portion of a top plate 4a forming the bogie 4. Gate-shaped member 19 so as to straddle this opening 18.
Is provided upright, and a supporting member 20 for supporting the weaving device 11 provided with the welding torch 10 is vertically provided at the center thereof. The circular handles 21 and 22 are handles for adjusting the horizontal position and the vertical position of the welding torch 10, respectively. A torch presser 10a is provided so as to project from the center of the weaving device 11 to the front, and the welding torch 10 is gripped there.

A guide traveling wheel 23 is provided at the center of the front part of the carriage 4 so as to be able to move up and down. By rotating the handle 23a, the guide traveling wheel 23 can be moved up and down, and when the guide traveling wheel 23 is lowered, the front wheel 12a of the carriage 4 floats.

On the other hand, on the top plate 4a of the carriage 4, a pair of sheaves 16 are arranged at the center and the right side of the front part, and a pair of sheaves 17 are arranged at the rear part symmetrically with the sheaves. The drive motor 5 is provided so that the drive shaft 5a is horizontal, and a drive pulley 15 is provided at the end of the drive shaft 5a. The wire rope 3 is wound around the drive pulley 15 once and guided in the front-rear direction, and is passed through the pair of sheaves 16 and 17 arranged in the front-rear direction in a substantially S-shape in plan view. It extends back and forth.

In the second embodiment, unlike the first embodiment, a welding torch is used.
10 is installed in the center of the bogie 4, a guide traveling wheel 23 is provided in the center of the front of the bogie 4, and eventually the wire rope 3, the guide traveling wheel 23, and the welding torch 10 are arranged on the same line. . The wire rope 3 is guided to a drive pulley 15 (axis is horizontal) via sheaves 16 and 17 provided on the front and rear of the bogie on the same plane. Then, when the welding apparatus of the second embodiment is used, the guide traveling wheel 23 is lowered and the front wheel 12a is floated as shown in FIGS. 4 (a) and 4 (b), and the rear wheel 12 and the guide traveling wheel 23 are separated from each other. It is configured to run. In this case, the guide traveling wheel 23 is dropped into the welding groove portion 1a of the object to be welded 1 to move the carriage 4 along the welding groove portion 1a while being guided by the welding traveling torch 10 and the guide traveling wheel 23. Since it is arranged on the line, the welding groove after the guide traveling wheel 23 has passed
Welding is to be applied to 1a. The wire rope 3 is also stretched on the same line, but the guide traveling wheel 23 travels in the groove portion 1a even if the wire rope 3 is slightly deviated, so that it does not deviate from the track, and the position of the welding torch 10 is also the welding groove portion 1a. And good welding results can be obtained. The guide traveling wheel 23 is detachably attached by a screw so that it can be easily replaced according to the groove shape.

Thus, the automatic welding apparatus B of the second embodiment is suitable for performing welding along the welding line 2 that runs on a curved surface such as the dome-shaped spherical cover C as shown in FIG. 4 (c). There is. In this case, as described above, the wire rope 3 is stretched so as to match the welding line 2.

In addition, in the second embodiment, since the carriage 4 is formed in a box shape and the welding torch 10 is arranged inside the box, there is an effect of shielding the wind, and in the case of CO ₂ welding, the wind blows and CO ₂ There is no need to worry that the weld will be blown and a welding defect will occur.

By using the automatic welding apparatuses A and B according to the present invention, vertical butt welding, horizontal downward butt welding and fillet welding, and spherical upper outer plate joint welding can be easily performed.

[Effect of device]

As described above, according to the present invention, the following effects can be obtained. That is, (a) a wire rope that is lightweight and easy to handle is used in place of the conventional heavy rail as a guide for the trolley, so the installation work can be performed extremely easily and quickly, resulting in labor saving and labor saving. Can greatly contribute to the achievement of

(B) If such a wire rope is stretched along the welding line once before the start of welding, there is no need to perform any special work until the end of welding (the troublesome work of welding while adding as in the conventional rail system and welding work). The present invention is particularly effective for long-distance continuous welding, and at the same time, the arc time is remarkably extended, so that the efficiency of the welding operation can be achieved.

(C) Since it is a method of tensioning the wire rope, there is no risk of falling like rails, and there is no need to bend the rails even on curved surfaces as in the past, and it is ideal for vertical welding of spherical and inclined surfaces. Become.

(D) In the case of claim 2, when the guide traveling wheel is dropped into the welding groove which is the welding line and the vehicle is made to travel, the welding torch also surely passes on this welding line, so that it is ensured that the predetermined welding line is met. Welding can be performed accurately.

[Brief description of drawings]

FIG. 1 is a perspective view of an automatic welding apparatus according to a first embodiment of the present invention, and FIGS. 2 (a), (b) and (c) are a plan view, a side view and a front view, respectively. 3 (a), (b) and (c) are a side view, a plan view and a front view of an automatic welding apparatus according to a second embodiment of the present invention, and FIGS. 4 (a) and (b) show this automatic welding. FIG. 4C is a side view and a front view showing a usage state when vertical welding is performed on the upper portion of the spherical cover of FIG. 4C using the apparatus, and FIG. 4C is a welding line layout diagram of the spherical cover. FIG. 5 is a side view showing a welding condition by a conventional automatic welding apparatus. 1 ... Object to be welded, 2 ... Welding (planned) line, 3 ... Wire rope, 4 ... Truck, 5 ... Drive motor, 10 ... Welding torch, 11 ...
Weaving device, 12 ... running wheel, 15 ... drive pulley, 16,
17 ... sheave, 23 ... guide running wheel, A, B ... automatic welding device.

Claims (2)

[Scope of utility model registration request] 1. An automatic welding apparatus having a self-propelled carriage equipped with a welding machine and traveling along a welding line, wherein a drive pulley for driving a carriage provided on the carriage is attached to at least the front of the carriage. While a sheave is provided in the section, a wire rope for traveling guide of the truck is stretched along the welding line,
Moreover, the wire rope is laid over the sheave, guided to the drive pulley, wound around the drive pulley, and guided rearward, so that the carriage can run while being guided by the wire rope. And automatic welding equipment. 2. A wire rope is stretched almost directly above a welding line, a welding machine is mounted on a bogie main body, and a guide traveling wheel is provided at a front portion of the bogie so as to be vertically movable. 2. The automatic welding apparatus according to claim 1, wherein a welding torch of the welding machine is arranged on the same line, and the guide traveling wheel is made to travel on the welding line to perform welding.