KR20010000805U - Contact tip structure for submerged arc welding by using multiple welding torches - Google Patents

Abstract

The present invention is a flux that melts during welding when using multi-electrode of more than 3 electrodes in submerged arc welding of consumable welding method used in shipbuilding or steel structure manufacturing process, 20-30mm Multi-electrode submerged arc welding for preventing the welding work by stopping the supply of welding wire by dissolving the tip of the contact tip, which is attached to the contact tips of the welding electrodes installed at intervals, and dissolving the tip of the contact tip. In the case of the submerged arc welding using a multi-electrode of three or more electrodes, the material of the contact tip (C) uses about 0.25 to 0.9% of chromium alloy for pure copper and the contact tip (C) The length of the inner wire guide hole 11 is increased to 65 ± 5 mm, the outer circumference of the top end 21 is φ12, and the outer circumference of the stop 31 is φ18, so that the contact tip C The structure of the electrode submerged arc welding contact tip for, characterized in that that form a constant slope to an end.

Description

Contact tip structure for submerged arc welding by using multiple welding torches}

The present invention is a flux that melts during welding when using multi-electrode of more than 3 electrodes in submerged arc welding of consumable welding method used in shipbuilding or steel structure manufacturing process, 20-30mm Multi-electrode submerged arc welding for preventing the welding work by stopping the supply of welding wire by dissolving the tip of the contact tip, which is attached to the contact tips of the welding electrodes installed at intervals, and dissolving the tip of the contact tip. It relates to the structure of contact tips.

In general, the submerged arc welding method uses electrodes such as one electrode, two electrodes, and three electrodes, and performs welding at high current and high speed, so that the welding speed is faster than that of the gas metal arc welding method, and the number of welding passes is reduced, especially in thick plate welding. The deformation of the weld is reduced and the quality can be improved.

Since the contact tip used in the conventional multi-electrode submerged arc welding typically used up to 1 electrode, 2 electrodes, and 3 electrodes, the flux that melted during welding did not cause the slag to adhere to the contact tip. Although not high, submerged arc welding is a highly efficient welding technique, and the number of electrodes increases, so that the use of three or more electrodes is gradually required for the use of three or more electrodes. The distance between the tips is 20-30mm, and the slag is stuck to the tip in the melted flux, which increases the occurrence of open arc and does not sufficiently protect the weld metal from the air, and also dissolves the tip of the contact tip. There was a problem that the welding operation can not be performed by stopping the supply of the.

Therefore, the present invention has been made for the purpose of solving the above-mentioned conventional problems and minimizes the open arc generated during multi-electrode submerged arc welding using more than three electrodes, and protects the contact tip from the generated open arc. It is to provide a contact tip that can ensure the stability of the arc during welding by preventing the interruption of the welding operation by the welding wire supply interruption due to the melting of the contact tip that can be generated during welding.

In order to provide the contact tip, the contact tip is made of pure copper (Cu) of about 0.25 to 0.9% of chromium as an alloying material to reduce the wear resistance in the high temperature atmosphere and to increase the cross-sectional area of the contact tip. Increase the contact tip length to 65 ± 5mm to improve heat resistance and durability by giving a constant slope, and reduce the occurrence of open arc in multi-electrode submerged arc welding to ensure arc safety during welding. You can provide contact tips that you can.

1 is an overall structural diagram of the subject innovation

2 is a cross-sectional structure diagram of the present invention

* Explanation of symbols for main parts of the drawings

(11) wire usher

21.

(31) interruption

(C) contact tips

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

1 shows the external structure of the contact tip as the overall structural diagram of the present invention, Figure 2 is a cross-sectional structural view of the present invention showing the internal structure of the contact tip.

In submerged arc welding using more than three electrodes, the material of the contact tip C uses about 0.25 to 0.9% of chromium alloy for pure copper and the inner wire guide hole 11 of the contact tip C. The length is increased to 65 ± 5mm, the outer edge of the top end 21 is φ12, and the outer circumference of the stop 31 is φ18, and a constant slope is formed at the tip of the contact tip C.

According to the present invention as described above, in performing submerged arc welding using multi-electrodes of three or more electrodes, the flux melted during welding clings to the contact tip C to generate an open arc. Abrasion resistance is reduced by using a material alloyed with chromium, and the tip of the contact tip (C) is machined with the tip 21 and the stop 31 at φ 12-φ18 to form a constant slope to increase the energization cross-sectional area. By improving the heat resistance and durability of the contact tip (C), to minimize the sticking of the molten slag between the electrodes due to the open arc during welding, and to increase the length of the guide hole (11) of the welding wire to 65 ± 5mm By improving the straightness of the wire to be eliminated as a result the welding is stopped due to the interruption of the feeding of the welding wire.

Therefore, the present invention does not sufficiently protect the weld metal from the air due to slag sticking to the contact tip generated during the submerged arc welding operation using more than three electrodes, so that the wires are supplied by dissolving the tip of the contact tip. By changing the material of the contact tip, changing the tip of the contact tip, and extending the wire guide hole, multi-electrode submerged arc welding reduces the occurrence of open arc and ensures the stability of the arc during welding. will be.

Claims (1)

In submerged arc welding using three electrodes or more, The material of the contact tip (C) uses about 0.25 to 0.9% of chromium alloy for pure copper, increases the length of the inner wire guide hole 11 of the contact tip (C) to 65 ± 5 mm, and The structure of the contact tip for multi-electrode submerged arc welding, characterized in that a constant slope is formed at the tip of the contact tip (C) with a circumference of φ12 and an outer circumference of the stop portion 31 of φ18.