JPH05131274A - Consumable electrode type welding equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To enable precise control of the welding amount of welding beads. A consumable electrode type welding torch body 4 is formed by integrating a plurality of consumable electrode type welding torches 9 and 10 with an insulating material 11 interposed therebetween, and the consumable electrode type welding torches 9 and 10 are individually formed. The welding wire 8 is fed to and the welding power sources 34 and 35 are individually connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a consumable electrode type welding device.

[0002]

2. Description of the Related Art As a consumable electrode type welding apparatus, a consumable electrode type welding torch is provided which is capable of simultaneously feeding a plurality of welding wires toward a groove formed in a workpiece in equal amounts. It has been proposed that a single welding power source is connected to the consumable electrode welding torch.

Then, an equal welding current is applied between the object to be welded and each welding wire of the consumable electrode type welding torch from a welding power source provided only for one unit to form a plurality of welding wires on the object to be welded. By simultaneously feeding equal amounts toward the groove, an arc is generated between a plurality of welding wires and the groove to weld the groove.

At this time, the wire feed amount and the magnitude of the welding current are generally proportional to each other, such that the welding current increases as the wire feed amount increases.

[0005]

However, the above-mentioned consumable electrode type welding device has the following problems.

That is, since only one welding power source is provided, a large-capacity welding power source capable of melting a plurality of welding wires at one time is required, which increases the heat input of welding. It is unavoidable that the welding amount of the weld bead on the groove becomes excessive.

Moreover, since the feed amount and welding current for each welding wire cannot be controlled individually, it is not possible to control them to adjust the welding amount of the welding bead. or,
Since the above cannot be controlled individually, the electric current preferentially flows through the easily melted wire and the arc becomes unstable.

From the above, the range in which the welding amount of the welding bead can be adjusted becomes narrow, and it becomes difficult to precisely control the welding amount. Therefore, it is necessary to precisely control the welding amount of the welding bead according to the welding position. It was difficult to obtain a satisfactory welding result when performing full circumference welding of a pipe or the like or welding to a narrow groove.

In view of the above situation, it is an object of the present invention to provide a consumable electrode type welding device capable of precisely controlling the welding amount of welding beads.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a plurality of consumable electrode type welding torches are integrated together via an insulating material to form a consumable electrode type welding torch body, and each consumable electrode type welding torch is formed. The present invention relates to a consumable electrode type welding device characterized in that a welding wire is individually fed and a welding power source is individually connected.

[0011]

According to the present invention, a plurality of consumable electrode type welding torches are integrated together via an insulating material to form a consumable electrode type welding torch body, and a welding wire is individually attached to each consumable electrode type welding torch. By feeding the welding power source and individually connecting the welding power source, it is possible to reduce the capacity of each welding power source and to individually control the consumable electrode welding torch.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 9 show an embodiment of the present invention.

In the figure, 1 is a welding carriage that can run along a groove 3 formed in a material 2 to be welded, and 4 is an insulating material 5 on the welding carriage 1.
Also, the consumable electrode welding torch body is supported so as to be able to move up and down and oscillate to the left and right through an elevating slide 6 as shown in FIG. 4 and an oscillating slider 7 as shown in FIG.

In FIG. 4, 39 is a motor, 40 and 41 are gears, 42 is a screw shaft, 43 in FIG. 5 is a motor,
44 is a pinion, 45 is a rack, and 46 is a cross roller guide.

The consumable electrode type welding torch body 4 comprises a plurality of consumable electrode type welding torches 9 and 10 (two in the figure) capable of feeding one welding wire 8 toward the groove 3, and an insulating material. 11
And a supporting portion 38 supported by the welding carriage 1, and a rotation oscillating motor (not shown) rotatably held in the supporting portion 38 and gears 36, 3
Torch block portion 12 rotatably connected via 7
A torch nozzle portion 13 integrally extending downward from the torch block portion 12, and a groove 3 covering the torch nozzle portion 13.
And a shield nozzle portion 14 (not shown in FIG. 1) adapted to eject a shield gas to the welded portion.

A plurality of units 15 and 16 are provided on the welding carriage 1 in correspondence with the respective consumable electrode type welding torches 9 and 10.
Wire brackets for holding the wire coils 17 and 18, and 19 and 20 for feeding the welding wire 8 from the wire coils 25 and 26 through the wire feed rollers 21 and 22 and the speed reducers 23 and 24. Motor, 2
Reference numerals 7 and 28 denote coil fixing rings for locking the wire coils 17 and 18 from the coil shafts 29 and 30 projecting from the wire brackets 15 and 16, respectively, and 31 and 32 are wire conduits. Bracket 15,
At least one of the wire brackets 15 of 16 is
It is made foldable by a bracket foldable hinge 33, and the wire coils 17 and 18 can be exchanged by tilting the wire bracket 15.

Each consumable electrode type welding torch 9, 10
As shown in FIG. 7, welding power sources 34 and 35 are individually connected between the welding target material 2 and the welding target material 2.

Next, the operation will be described.

While the welding carriage 1 is running along the groove 3 formed in the material 2 to be welded, the wire feeding motors 19 and 20 are provided.
Is driven to feed the welding wire 8 from the wire coils 25 and 26 through the wire feed rollers 21 and 22 and the speed reducers 23 and 24, and the consumable electrode welding torches 9 and 1 are supplied.
0 to feed to the groove 3 and individually supply a welding current between the consumable electrode type welding torches 9 and 10 and the workpiece 2 by the welding power sources 34 and 35 to generate an arc therebetween. Thereby, the welding of the groove 3 is performed.

In the present invention, a plurality of consumable electrode type welding torches 9 and 10 capable of feeding a single welding wire 8 and an insulating material 1 are used.
1, the consumable electrode type welding torches 9 and 10 are individually connected to the welding power sources 34 and 35, so that the welding power sources 34 and 35 can be reduced in capacity. With consumable electrode welding torch 9,10
Can be controlled individually.

As a result, for example, if the consumable electrode type welding torches 9 and 10 are used alternately, the heat input of welding can be reduced, and the consumable electrode type welding torches 9 and 10 can be reduced.
If only 10 is used or both are used at the same time, the control range of the welding amount of the welding bead with respect to the groove 3 can be expanded, and therefore the welding amount of the welding bead can be changed according to the welding position. It is possible to perform high-precision all-around welding of pipes, etc., which requires precise control, and welding to narrow gaps.

FIG. 8 is a time chart of the feeding speed of the welding wire 8 showing the usage of the consumable electrode type welding torches 9 and 10. An example in which the consumable electrode type welding torches 9 and 10 are alternately used is shown. ing.

Thus, the consumable electrode type welding torches 9, 1
By alternately using 0, a pulsed welding current is applied to the consumable electrode welding torches 9 and 10.

When two consumable electrode type welding torches 9 and 10 are provided, the consumable electrode type welding torches 9 and 10 are used.
By arranging the welding grooves side by side with respect to the groove 3, the welding beads having a small amount of welding are formed in the groove 3 in a staggered manner.

In FIG. 8, the wire feeding motors 19, 2 are further added.
In consideration of the rising and falling of 0, the feeding speed is reduced at the start and the end of the feeding of the welding wire 8.

The melting rate of the welding wire 8 is controlled by making the feeding rate of the welding wire 8 or the feeding rate of the welding wire 8 proportional to the welding current.

FIG. 9 is a time chart of the feeding speed of the welding wire 8 showing another method of using the consumable electrode type welding torches 9 and 10. As with FIG. 8, the consumable electrode type welding torches 9 and 10 are shown. However, the feeding speed of the welding wire 8 is proportionally increased or decreased when the wire feeding motors 19 and 20 rise and fall. .

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0030]

As described above, according to the consumable electrode type welding apparatus of the present invention, the excellent effect that the welding amount of the welding bead can be precisely controlled can be obtained.

[Brief description of drawings]

FIG. 1 is an overall side view of an embodiment of the present invention.

FIG. 2 is a view taken along the line II-II of FIG.

FIG. 3 is a view on arrow III-III in FIG. 1.

FIG. 4 is a view taken along the line IV-IV in FIG.

5 is a view taken along the line VV of FIG.

6 is an enlarged perspective view of the consumable electrode type welding torch body of FIG. 1 with a part thereof omitted.

FIG. 7 is a schematic diagram including a welding power source.

FIG. 8 is a time chart showing a feeding speed of a welding wire.

FIG. 9 is a time chart different from FIG. 8 showing the feeding speed of the welding wire.

[Explanation of symbols]

 4 Consumable electrode type welding torch body 8 Welding wire 9,10 Consumable electrode type welding torch 11 Insulation material 34,35 Welding power source

Claims (1)

[Claims] 1. A consumable electrode type welding torch body is formed by integrating a plurality of consumable electrode type welding torches via an insulating material, and a welding wire is individually fed to each of the consumable electrode type welding torches. A consumable electrode type welding device characterized in that a welding power source is individually connected together with the welding power source.