Current contact nozzle for arc welding

Abstract

The invention discloses a current contact nozzle for arc welding and relates to the field of accessories of welding devices. The current contact nozzle for arc welding comprises a current contact nozzle body and a limiting plate, the current contact nozzle body comprises a threaded section and a non-threaded section, the threaded section is fixedly connected with the non-threaded section, a rhombic through hole penetrating through the threaded section and the non-threaded section is formed in the current contact nozzle body, the rhombic through hole is used for guiding welding wires, a groove is formed in the free end of the threaded section, the limiting plate is matched with the groove, a flower-shaped through hole corresponding to the position of the rhombic through hole is formed in the limiting plate, and the flower-shaped through hole is used for guaranteeing that at least two contact lines exist between the welding wire and the current contact nozzle. The current contact nozzle for arc welding solves the problem that in the prior art, the current contact nozzle for arc welding and the welding wires are prone to being in poor contact.

Description

Technical field [0001] The invention relates to the field of welding equipment accessories, in particular to a contact tip for arc welding. Background technique [0002] The contact tip is a vulnerable part of welding equipment and is used to transmit the electric energy of the welding machine to the welding wire. [0003] When welding, the arc temperature exceeds 1000°C. The current contact tip is basically made of copper or copper alloy, and the softening temperature is much lower than the arc temperature. The contact tip will be deformed during the softening process, and the inner hole of the contact tip will expand. Due to the current contact tip The inner hole is generally circular or elliptical, and the welding wire is generally circular. After the inner hole is enlarged, the contact area of ​​the circular welding wire and the inner hole of the contact tip is reduced. Sometimes there is only one contact line, resulting in poor contact between the welding wire and the contact ...

AI Technical Summary

Problems solved by technology

[0003] When welding, the arc temperature exceeds 1000°C. The current contact tip is basically made of copper or copper alloy. The softening temperature is much lower than the arc temperature. The contact tip will deform during the softening process, and the inner hole of the contact tip will expand. Due to the current contact tip The inner hole of the welding wire is generally round or oval, and the welding wire is generally round. After the inner hole is enlarged, the contact area between the round welding wire and the inner hole of the contact tip is reduced, and sometimes there is only one contact line, resulting in poor contact between the welding wire and the contact tip. It not only affects the welding effect, but also requires frequent replacement of the contact tip, resulting in low efficiency and large loss

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