JPH0459071B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a welding device used for fillet welding.

[Prior Art] Conventionally, for example, when fillet welding a vertical plate and a horizontal plate in one pass in a downward position, a two-electrode fillet arc welding method has been used as a method for increasing the vertical leg length and horizontal leg length. It has been adopted.

In this two-electrode fillet arc welding method, a leading electrode and a trailing electrode are provided at a predetermined interval in the welding direction, and a leading arc is generated between the leading electrode and the fillet weld to form a lower bead. A trailing arc is generated between the trailing electrode and the lower bead to form an upper bead on the lower bead, and at this time shielding gas is supplied to the fillet weld.
According to this method, the vertical leg length and the horizontal leg length can be made longer than the single electrode fillet arc welding method using one electrode.

[Problems to be Solved by the Invention] When welding is performed using the two-electrode welding method as described above, there has been no conventional systemized device, and a device that can easily perform two-electrode welding has been desired.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus that can easily perform two-electrode welding.

[Means for solving the problem] The welding device according to the present invention has two sets of welding torches arranged at a distance in the direction of the welding line on a cart guided along the welding line, In a welding device that forms a bead of a trailing welding torch along a bead of a preceding welding torch, an A torch in which a shaft slide block is provided on each of the two sets of welding torches, and the welding angle is adjusted by rotating the welding torch around a point on an extension of the tip of the welding torch within a plane perpendicular to the welding line. An angle adjustment mechanism is provided for each of the two sets of welding torches, and a control device is provided for continuously positioning the welding torch during welding by the X-axis slide block and Y-axis slide block independently of the travel guide of the trolley. This solves the above problems.

[Function] In the present invention, the position in the X-axis direction is adjusted by the X-axis slide block placed on the truck, and the position in the Y-axis direction is adjusted by the Y-axis slide block while the truck is moved. By rough-cutting the welding torches and adjusting the α-axis of each welding torch using each torch angle adjustment mechanism, the two sets of welding torches can be quickly moved along the groove, and each welding The torch can be aimed reliably on the groove, making two-electrode welding easier. At this time,
An X-axis slide block and a Y-axis slide block that move the welding torch in the X-axis direction and Y-axis direction within a plane perpendicular to the welding line, and the X-axis slide block and Y-axis slide independently of the traveling guide of the trolley. Since the block is combined with a control device that continuously positions the welding torch during welding, it is possible to trace the welding line more precisely than by positioning the welding torch only by guiding the movement of the cart. Even if traveling is affected, the welding torch is quickly returned to the welding line. The control device uses a means for recognizing the welding position, for example, an arc current or an arc sensor that measures the arc current,
The X-axis slide block and the Y-axis slide block are operated so that the detection signal resulting from this becomes close to a preset reference signal. In addition, it is equipped with a ``torch angle adjustment mechanism that adjusts the welding angle by rotating the welding torch around a point on the extension line of the tip of the welding torch within a plane perpendicular to the welding line.'' X at the tip of the welding torch when changed
The amount of movement in the axial and Y-axis directions is small, the welding torch tip can be positioned quickly and accurately before welding starts, and the arc condition will not become unstable even if the torch angle is changed during welding. The torch angle can be changed easily and rapidly not only before welding starts but also during welding.

[Example] Figure 1 is a front view showing an example of the present invention, and Figure 2 is a front view showing an example of the present invention.
The figure is a side view.

In the figure, 10a is a preceding welding torch, 10b
are trailing welding torches, which for example consist of rotating arm welding torches. Further, these leading and trailing welding torches 10a and 10b are kept at an appropriate distance from each other, and the distance can be changed freely. And these welding torches 10a, 1
0b are connected to the torch heads 20a, 20b, respectively, but the torch heads 20a, 20b
are further connected to torch angle adjustment mechanisms 30a, 30b. These are placed on X-axis slide blocks 40a, 40b, and the X-axis slide blocks 40a, 40b are further placed on Y-axis slide blocks 50a, 50b.

Wires 80a and 80b are supplied from wire reels 70a and 70b, respectively, and wire feeding device 6
Each welding torch 10a, 10 via 0a, 60b
sent to b. In addition, 90 is a trolley main body, 100 is a wheel, and 110 is an operation pendant.

When performing welding using the apparatus configured as described above, first, the cart main body 90 is positioned so that it can move parallel to the groove to be welded, and the cart main body 90 is moved along the groove. Welding work is performed while moving the machine and performing a rough inspection.

Rough profiling is performed by adjusting the distance to the vertical wall using the X-axis slide blocks 40a and 40b while the truck body is moving, and by adjusting the distance to the vertical wall using the Y-axis slide block 50.
This is done by adjusting the position in the height direction with a and 50b.

In actual welding, the α-axis of the preceding welding torch 10a is adjusted by the torch angle adjustment mechanism 30a to first form a lower bead between the horizontal wall and the vertical wall, and then the α-axis of the trailing welding torch 10b is adjusted using the torch angle adjustment mechanism 30a. An upper layer bead is formed between a horizontal wall or a vertical wall and a lower layer bead by adjusting the angle adjustment mechanism 30b. In this case, the leg length can be freely changed by adjusting the formation positions of the lower layer bead and the upper layer bead. Note that each operation is performed via the operation pendant 110.

FIG. 3 is an explanatory diagram showing an example of a case where welding work is performed in automatic operation using the apparatus of the above embodiment. In this case, the welding position 200 according to the present invention
is controlled by the control device main body 210.
Note that 220 is a welding power source.

In this way, it becomes possible to automatically operate the present device by remote control, and welding work can be performed extremely easily.

FIG. 4 is a side view showing another embodiment of the present invention. In this example, the wire reels 70a and 70b are arranged on one side, and the other configurations are completely the same as the first example. Other different arrangements are possible.

[Effects of the Invention] As explained above, the present invention adjusts the position in the X-axis direction using the X-axis slide block placed on the truck, and adjusts the position in the Y-axis direction using the Y-axis slide block.
By moving the trolley while adjusting the axial position, rough profiling is performed, and by adjusting the α-axis of each welding torch using the torch angle adjustment mechanism of each of the two sets of welding torches. Since the welding torches can be quickly moved along the groove and each welding torch can be reliably aimed at the groove, two-electrode welding can be performed extremely quickly. It also has the effect of being compatible with automation.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention, Figure 2 is a front view showing one embodiment of the present invention;
The figure is a side view, FIG. 3 is a perspective view showing an example of the overall configuration for operating the device of the present invention, FIG. 4 is a front view showing another embodiment of the present invention, and FIG. 5 is a side view thereof. It is a diagram. [Description of symbols of main parts], 10a... Leading rotating arc welding torch, 10b... Trailing rotating arc welding torch, 20a... Leading torch head, 20
b... Trailing torch head, 30a... Leading torch angle adjustment mechanism, 30b... Trailing torch angle adjusting mechanism, 40a... Leading X-axis slide block, 40
b... Trailing X-axis slide block, 50a... Leading Y-axis slide block, 30b... Trailing Y-axis slide block, 60a... Leading wire feeding device, 60b... Trailing wire feeding device, 70a... …
Leading wire reel, 70b... Trailing wire reel, 80a... Leading wire, 80b... Trailing wire, 90... Truck body, 100... Wheel, 110...
…Operation pendant.

Claims (1)

[Claims] 1. It has two sets of welding torches arranged at a distance in the direction of the welding line on a cart guided along the welding line, and the bead of the trailing welding torch follows the bead of the preceding welding torch. In the welding device for forming welding lines, the two sets of welding torches are each provided with an X-axis slide block and a Y-axis slide block for moving the welding torches in the X-axis direction and the Y-axis direction within a plane perpendicular to the welding line, and Each of the two sets of welding torches is provided with a torch angle adjustment mechanism that adjusts the welding angle by rotating the welding torch around a point on the extension line of the tip of the welding torch in a plane perpendicular to the line, and A welding apparatus characterized in that a control device is provided for continuously positioning a welding torch during welding using the X-axis slide block and Y-axis slide block independently of the travel guide.