JP2909325B2 - Consumable electrode welding torch - Google Patents

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 torch.

[0002]

2. Description of the Related Art Conventionally, when performing fillet welding with a consumable electrode type welding torch, as shown in a perspective view of FIG.
The welding power source 2 is connected to the base material 1 to be fillet-welded, the welding torch 3 is opposed to the base material 1, and the wire 5 is projected from the tip 4 at the tip of the welding torch 3 so that the gap between the tip of the wire 5 and the base material 1 is formed. Arc 6 is generated in the welding torch 3
The cable 7 connecting the base of the welding power source 2 with the wire 5 accommodates the wire 5, the power supply nozzle 8 and the shield gas supply pipe 9, and connects the welding torch 3 to a mechanical swing mechanism 42.
And is supported by the support arm 41 via the.

[0003] With such an apparatus configuration, first, the shielding gas is supplied from the shielding gas supply pipe 9 to the chip 4.
When a no-load voltage is applied from the welding power source 2 and the wire 5 is supplied to the base material 1 through the chip 4, an arc 6 is generated at the moment when the base material 1 and the tip of the wire 5 come into contact with each other. Then, the surface of the base material 1 around which the arc 6 is generated by the arc heat is melted, and the tip of the wire 5 is also melted by the arc heat and moves to the molten portion of the base material 1. At the same time, when the support arm 41 is moved in the welding line direction of the base material 1, a weld bead 43 is formed. However, at this time, it is necessary to swing the arc 6 in order to secure the leg length of the welding bead 43. Therefore, the welding torch 3 must be welded while swinging by the swing mechanism 42.
When the wire length is about 0A and the wire diameter is 1.6 mm, it is necessary to secure the leg length of 5 to 6 mm. Therefore, the swing of the welding torch 3 needs to swing about 2 to 5 mm at the tip of the wire 5. Usually, when the welding speed is 300 mm / min, the swing cycle is 1/1.
It is about 0 sec. On the other hand, there is a strong demand for higher efficiency of the welding operation at present, and it is required to increase the welding speed to increase the efficiency. To further increase the welding speed, it is necessary to further increase the swing. However, it is difficult to swing the welding torch 3 at high speed because the welding torch 3 is heavy and the cable 7 is hard, and the swing mechanism 42 has a mechanical limit. In addition, if the welding torch 3 is to be swung at a high speed, the swinging mechanism 42 becomes large and not only deteriorates the welding work significantly, but also the peripheral jig for supporting the large swinging mechanism 42 becomes large. And the price may increase.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of such circumstances, and can swing an arc at a high speed, achieve high welding efficiency, and further improve mechanical performance. It is an object of the present invention to provide a consumable electrode type welding torch which can be simply and lightly weighted because the swinging mechanism has a small movement and can facilitate welding work.

[0005]

For this purpose, the present invention provides a wire supply nozzle having a tip attached to a tip of a torch base via a flexible member, and a tip attached to the tip of the torch base. A hemispherical body attached thereto, a slanted ellipsoidal rotator abutted eccentrically from the center axis of the hemispherical body, and a motor coupled to a rotation axis of the slanted elliptical rotator. I do.

[0006]

In the consumable electrode type welding torch of the present invention, when a rated output is input to the motor, the inclined elliptical rotator attached to the rotating shaft of the motor rotates. Since the rotation axis of the inclined ellipsoidal rotator is eccentric from the center axis of the hemispherical body, when the inclined ellipsoidal rotator rotates, the contact point of the hemispherical body moves on the inclined surface of the inclined ellipsoidal rotator, Each time the inclined ellipsoidal rotator makes one revolution, it follows the same trajectory. As a result, the wire supply nozzle fixed to the hemispherical body swings, and the tip at the tip can swing.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the consumable electrode type welding torch of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of the main welding torch, FIG.
FIG. 4 is an explanatory view for swinging operation of the main welding torch. First, in FIGS. 1 and 2, reference numerals 1 to 9 denote the same members as in FIG. 4, and the torch base 10 is fixed to a support arm 12 by a mounting bolt 11. A wire supply nozzle 14 is attached to a tip of the torch base 10 via a spring 13, and a tip 4 is attached to a tip of the wire supply nozzle 14, and a wire 5 protrudes from the tip.

A hemispherical body 15 is mounted on the side surface of the wire supply nozzle 14, and a spring 16 is mounted on the opposite side surface. A slope formed by diagonally cutting a cylinder is formed on the surface of the hemispherical body 15. Ellipsoidal rotator 1
7 are eccentrically contacted by 2 mm from the center axis of the hemispherical body 15. Further, the rotation axis of the DC motor 18 is connected to the rotation axis of the inclined ellipsoidal rotator 17, and a driver 19 is connected to the DC motor 18. The driver 19 can output a rated voltage of 24 V of the DC motor 18 and can arbitrarily adjust the voltage within a range of 0 to 24 V by a built-in voltage regulator.

In such an apparatus, the operation until the arc 6 is generated is the same as that of the conventional apparatus. Then, the arc 6 is swung to secure the leg length. To describe the swinging operation, first, when 24 V, which is the rated output, is input from the driver 19 to the DC motor 18, the inclined elliptical rotator 17 attached to the rotating shaft of the DC motor 18 rotates. Since the rotation axis of the inclined ellipsoidal rotator 17 is mounted eccentrically by 2 mm from the center axis of the hemispherical body 15, and the hemispherical body 15 is constantly pressed against the inclined surface of the inclined elliptical rotator 17 by the spring 16,
When the inclined ellipsoidal rotator 17 rotates, the contact point of the hemispherical body 15 moves while sliding on the inclined surface of the inclined ellipsoidal rotator 17, and the contact point is the same each time the inclined ellipsoidal rotator 17 makes one revolution. Since the trajectory is taken, as a result, the hemispherical body 15
The wire supply nozzle 14 fixed at this position swings, and can swing the tip 4 at the tip.

[0010] This swinging operation will be described in more detail with reference to FIG. 3. In the state shown in FIG. Set up so that 4 is on the left. When the inclined ellipsoidal rotator 17 rotates, the contact point between the hemispherical body 15 and the inclined surface of the rotator moves while sliding on the inclined surface, and the chip 4 also moves from the left to the center, as shown in FIG. When the inclined ellipsoidal rotator 17 is further rotated, the contact point moves to a position closest to the rotation axis, and the tip 4 moves from the center to the right, as shown in FIG. Thus, the tip 4 is rotated by one rotation of the rotating shaft, and the chip 4 becomes (a) → (b) → (c) → (b) →
It swings in the order of (a). The swing speed can be controlled by adjusting the number of rotations of the DC motor 18 with the driver 19, and when the input voltage to the DC motor 18 is 24V, the swing speed can be as high as 100 Hz.

[0011]

In summary, according to the present invention, a wire supply nozzle attached to the tip of the torch base via a flexible member and having a tip attached to the tip, and a wire supply nozzle attached to the side of the wire supply nozzle. By providing a hemispherical body, a slanted ellipsoidal rotator abutted eccentrically from the center axis of the hemispherical body, and a motor coupled to the rotation axis of the slanted elliptical rotator, the arc can be rotated at a high speed. A consumable electrode type welding torch capable of swinging, achieving high welding efficiency, and having a small mechanical movement because the swinging mechanism has a small mechanical movement. Therefore, the present invention is extremely useful in industry.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of a consumable electrode type welding torch of the present invention.

FIG. 2 is a front view showing a usage mode of the present welding torch.

FIG. 3 is an explanatory diagram for a swing operation of the main welding torch.

FIG. 4 is a perspective view showing a usage mode of a conventional welding torch.

[Explanation of symbols]

 Reference Signs List 1 base material 2 welding power source 3 welding torch 4 tip 5 wire 6 arc 7 cable 8 power supply nozzle 9 shield gas supply pipe 10 torch base 11 mounting bolt 12 support arm 13 spring 14 wire supply nozzle 15 hemispherical body 16 spring 17 inclined elliptical surface rotation Body 18 DC motor 19 Driver

Claims (1)

(57) [Claims] 1. A wire supply nozzle attached to a tip of a torch base via a flexible member and having a tip attached to the tip, a hemispherical body attached to a side surface of the wire supply nozzle, and the hemispherical body A consumable electrode type welding torch, comprising: a slanted ellipsoidal rotator abutting eccentrically from the center axis thereof; and a motor connected to a rotation shaft of the slanted ellipsoidal rotator.