JPH0576669U - Consumable electrode welding torch - Google Patents

Abstract

(57) [Summary] [Purpose] The arc is swung at a high speed to improve the efficiency of welding, and a simple swing mechanism facilitates the welding work. A wire supply nozzle 14 attached to the tip of a torch base 10 via a spring 13 and a tip 4 attached to the tip thereof, and a pair of permanent magnets arranged on opposite side surfaces of the wire supply nozzle 14. 15a, 1
5b and the outside of the permanent magnets 15a and 15b, the center of the coil coincides with the center axis of the permanent magnets 15a and 15b.
It is provided with a pair of electromagnetic coils 16a, 16b arranged so as to be perpendicular to the polar plane of b, and an alternating voltage generator 19 for applying an alternating voltage to the electromagnetic coils 16a, 16b. Therefore, when an alternating voltage is applied to the electromagnetic coils 16a and 16b, an attractive force is generated on one side and a reaction force is generated on the other side between the electromagnetic coil 16a and the permanent magnet 15a and between the electromagnetic coil 16b and the permanent magnet 15b. As a result, the wire supply nozzle 14 swings.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a consumable electrode welding torch.

[0002]

[Prior Art]

 Conventionally, when performing fillet welding with a consumable electrode welding torch, as shown in the perspective view of FIG. 4, a welding power source 2 is connected to a base material 1 to be fillet welded, and a welding torch 3 is used as a base material 1. A wire for projecting a wire 5 from the tip 4 of the tip so that an arc 6 is generated between the tip of the wire 5 and the base material 1, and a cable for connecting the base of the welding torch 3 and the welding power source 2. The wire 7, the power supply nozzle 8 and the shield gas supply pipe 9 are accommodated in the wire 7, and the welding torch 3 is supported by a support arm 41 via a mechanical rocking mechanism 42.

With such an apparatus configuration, first, shield gas is supplied from the shield gas supply pipe 9 to the periphery of the tip 4 and a no-load voltage is applied from the welding power source 2, and the wire 5 is passed through the tip 4. When supplied to the base material 1, an arc 6 is generated at the moment when the base material 1 and the tip of the wire 5 contact each other, and the surface of the base material 1 around which the arc 6 is generated is melted by the arc heat and the wire 5 The tip also melts due to arc heat and moves to the melting part 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, the welding 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. Since it is necessary to secure a leg length of 5 to 6 mm when the wire diameter is 1.6 mm, it is necessary to swing the welding torch 3 about 2 to 5 mm wide at the tip of the wire 5. Usually, when the welding speed is 300 mm / min, this swing cycle is about 1/10 sec. On the other hand, there is a strong demand for higher efficiency of welding work 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 a high speed because the welding torch 5 is heavy, the cable 7 is hard, and the swing mechanism 42 has a mechanical limit. Further, if the welding torch 3 is to be swung at high speed, not only the swinging mechanism 42 becomes large but the welding work is significantly deteriorated, but also a peripheral jig for supporting the enlarged swinging mechanism 42 is used. There is a risk that the size will increase and the price will increase.

[0004]

[Problems to be solved by the device]

 The present invention has been proposed in view of such circumstances, and is a swing mechanism capable of swinging an arc at a high speed, achieving higher welding efficiency, and having no mechanical movement. Therefore, it is an object of the present invention to provide a consumable electrode type welding torch capable of simplifying the swing mechanism and facilitating welding work.

[0005]

[Means for Solving the Problems]

 To this end, the present invention provides a wire feed nozzle having a tip attached to the tip of a torch base via a flexible member, and a pair of wire feed nozzles provided on opposite sides of the wire feed nozzle. Of the permanent magnet, a pair of electromagnetic coils arranged so that the center of the coil coincides with the outside of the permanent magnet and its central axis is perpendicular to the polar plane of the permanent magnet, and an alternating voltage is applied to the electromagnetic coil. When an alternating voltage is applied to the above-mentioned pair of electromagnetic coils, an attractive force is generated on one side and a reaction force is generated on the other side between the electromagnetic coils at the same time. Thus, the wire supply nozzle is swung.

[0006]

[Action]

 In the consumable electrode welding torch of the present invention, by applying an alternating voltage to the electromagnetic coil, attractive force and reaction force are repeatedly generated between the electromagnetic coil and the permanent magnet according to the input voltage of the alternating voltage. Therefore, the wire supply nozzle to which the permanent magnet is fixed will oscillate due to repeated attraction and reaction. Further, the swing speed can be controlled by changing the cycle of the alternating voltage.

[0007]

DETAILED 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 vertical sectional view of the main welding torch, FIG. 2 is a front view showing a usage mode of the main welding torch, and FIG. It is explanatory drawing of the rocking | fluctuation action of a welding torch. First, in FIGS. 1 and 2, reference numerals 1 to 9 represent the same members as in FIG. 4, and the torch base portion 10 is fixed to the support arm 12 by a mounting bolt 11. A wire supply nozzle 14 is attached to the tip of the torch base 10 via a spring 13, a tip 4 is attached to the tip of the wire supply nozzle 14, and a wire 5 projects from the tip.

A pair of permanent magnets 15a and 15b having a length of 20 mm, a width of 10 mm, and a thickness of 3 mm are fixed to opposite side surfaces of the wire supply nozzle 14, respectively. A pair of electromagnetic coils 16a, 16b are provided on the outer sides of the pair of permanent magnets 15a, 15b, respectively, so that the center of the coil coincides with the central axis of the permanent magnets 15a, 15b. An iron core 17 is inserted into each of the electromagnetic coils 16a and 16b, and a screw 18 for adjusting the swing width by the insertion and withdrawal is incorporated therein. The electromagnetic coils 16a and 16b are connected to an alternating voltage generator 19.

In such a device, the operation until the arc 6 is generated is the same as that of the conventional device. Then, the arc 6 is swung to secure the leg length. This swinging action will be described with reference to FIG. First, an alternating voltage is applied from the alternating voltage generator 19 to the electromagnetic coils 16a and 16b. As a result, a reaction force and an attractive force are repeatedly generated between the electromagnetic coil 16a and the permanent magnet 15a and between the electromagnetic coil 16b and the permanent magnet 15b according to the alternating voltage, and the wire supply nozzle 14 is swung by this force.

Hereinafter, a state in which the reaction force and the attractive force act will be specifically described. The polarity of the permanent magnet 15a facing the electromagnetic coil 16a is the S pole, and the polarity of the permanent magnet 15b facing the electromagnetic coil 16b is the N pole, and a positive voltage is applied to the electromagnetic coils 16a and 16b. To do. Here, since the electromagnetic coils 16a and 16b having a rating of 24V are used, + 24V is input. Since the electromagnetic coils 16a and 16b are installed in advance so that the polarities are symmetrical, the polarities of the electromagnetic coils 16a and 16b on the side facing the permanent magnets 15a and 15b are the same, and + 24V is input. , So that the polarities of the electromagnetic coils 16a and 16b facing the permanent magnets 15a and 15b are S poles.

As a result, when +24 V is input to the electromagnetic coils 16a and 16b, the electromagnetic coils 16a and the permanent magnet 15a face each other with S poles, so that a reaction force is generated. On the other hand, since an N pole and an S pole are formed between the electromagnetic coil 16b and the permanent magnet 15b, attractive force is generated. Therefore, the wire supply nozzle 14 is eccentric to the left from the spring 13 as shown in FIG. 3 (A).

On the contrary, when -24V is input from the alternating voltage generator 19, an S pole and an N pole are created between the permanent magnet 15a and the electromagnetic coil 16a, and an attractive force is generated between the permanent magnet 15b and the electromagnetic coil 16b. Since the N poles are formed, a reaction force is generated, and the wire supply nozzle 14 is eccentric to the right side, as shown in FIG. Therefore, when an alternating voltage is input to the electromagnetic coils 16a and 16b, the wire supply nozzle 14 will oscillate.

As described above, the mechanism of the welding torch of the present invention can be swung at high speed without any mechanical movement, and the swing speed can be increased by changing the cycle of the alternating voltage, up to 100 Hz. Can swing. The swing width can be adjusted by moving the screw 18 in and out, and the maximum swing width at the tip of the tip 4 can be set to 2 mm. However, when fillet welding is performed using such a welding torch, a leg length of 5 to 6 mm which is a sound welding bead shape can be secured even at a welding speed of 2000 mm / min.

[0014]

[Effect of the device]

 In short, according to the present invention, a wire feed nozzle, which is attached to the tip of the torch base through a flexible member and a tip is attached to the tip, and a pair of wire feed nozzles, which are arranged on opposite sides of the wire feed nozzle, are provided. Of the permanent magnet, a pair of electromagnetic coils arranged so that the center of the coil coincides with the outside of the permanent magnet, and its central axis is perpendicular to the polar plane of the permanent magnet, and an alternating voltage is applied to the electromagnetic coil. When an alternating voltage is applied to the pair of electromagnetic coils, one attractive force and the other reactive force are simultaneously generated between each electromagnetic coil and the permanent magnet. By making the wire supply nozzle oscillate, the arc can be oscillated at a high speed, welding efficiency can be improved, and the oscillating mechanism has no mechanical movement. Motive Because get consumable electrode type welding torch which can facilitate simplification can welding operations, the present invention is extremely useful industrially.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of a consumable electrode type welding torch according to the present invention.

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

FIG. 3 is an explanatory view of a swinging action of the main welding torch.

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

[Explanation of symbols]

 1 Base Metal 2 Welding Power Supply 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 15a, 15b Permanent Magnet 16a, 16b Electromagnetic Coil 17 Iron core 18 Screw 19 Alternating voltage generator

Claims (1)

[Scope of utility model registration request] 1. A wire supply nozzle which is attached to the tip of a torch base through a flexible member and has a tip attached to the tip, and a pair of permanent magnets arranged on opposite side surfaces of the wire supply nozzle. And a pair of electromagnetic coils arranged so that the center of the coil coincides with the outside of the permanent magnet and its central axis is perpendicular to the polar plane of the permanent magnet, and an alternating voltage for applying an alternating voltage to the electromagnetic coil. A voltage generator is provided, and when an alternating voltage is applied to the pair of electromagnetic coils, an attractive force is generated on one side and a reaction force is generated on the other side between the electromagnetic coils and the permanent magnet at the same time, whereby the wire supply nozzle. A consumable electrode type welding torch characterized in that it is made to oscillate.