Rocking/rotating arc gas metal arc welding torch and a using method thereof

Abstract

The invention discloses a rocking / rotating arc gas metal arc welding torch and a using method thereof. The rocking / rotating arc gas metal arc welding torch comprises a hollow shaft motor, wherein a lower extending shaft is fixedly connected with an upper extending shaft of a feed disc penetrating through an electric brush mechanism in a motor base through a coupler, and a lower extending shaft ofthe feed disc is connected with an eccentric or bent conducting rod mechanism after penetrating through a supporting bearing arranged in an electric brush base; a motor base of the hollow shaft motoris fixedly connected with the electric brush base through connecting screws, and welding shielding gas and welding torch cooling effects are provided through inner holes of the connecting screws and abuilt-in gas circuit and a built-in cooling water circuit of the electric brush base; and when no additional sensing device is arranged on the upper extending shaft of the motor, the arc rocking / rotating frequency and the arc rocking midpoint are identified / detected through pre-calibration or a built-in photoelectric encoder of the servo motor, and the length of the conducting rod mechanism is adjusted through a blending or telescopic adjusting method. The welding torch is simple and compact in structure, high in transmission positioning precision, good in process adaptability, high in practicability, suitable for rocking arc and rotating arc gas shielded welding and capable of being used for submerged-arc welding in an expanded mode.

Description

technical field [0001] The invention relates to the technical field of arc welding, in particular to a gas-shielded gas-shielded welding torch having shaking arc and rotating arc welding functions and a using method thereof. Background technique [0002] Gas metal arc welding is a kind of welding wire as the melting electrode, and uses argon, CO 2 Gas, or argon-rich mixed gas as a protective medium, or the arc welding method using self-shielded flux-cored wire, is suitable for welding in various positions such as flat positions and spatial positions, and is widely used in metal manufacturing. In order to improve the weld formation and improve the performance of the welded joint, it is often necessary to control the welding arc with swinging, rocking or rotating motion. [0003] Chinese patent application with publication number CN1657211A titled "Rotary arc narrow gap welding method and device driven by hollow shaft motor", and publication number CN101412143A titled "Shakin...

AI Technical Summary

Problems solved by technology

The disadvantages of this type of welding torch are: ①The arc motion control method is single, the scope of application is narrow, and only a single rotating arc or shaking arc narrow gap welding can be realized; The positioning accuracy of the transmission is low, and the rotation resistance of the motor is large; ③A special sensing device for the arc rotation frequency or shaking frequency is used, and the device is installed between the motor mechanism and the brush mechanism, which makes the welding torch mechanism complicated; ④No The built-in cooling water circuit is set, and the torch body is easily heated by welding heat radiation; ⑤ no built-in gas circuit is provided, and only an external nozzle mechanism is used, which makes the torch nozzle mechanism complicated; ⑥ a conductive Rod and contact tip, poor process adaptability

Its disadvantages are: ①The rotary conductive seat is supported by double bearings, the arc rotary motion mechanism is complicated, and the positioning accuracy of the transmission is not high; ②The contact welding is fed through graphite powder, and its feeding stability is poor; ③The curved conductive tip It is a consumable part, and the implementation cost is high; ④A special position sensing mechanism is used to detect the swing angle of the contact tip, which makes the welding torch mechanism complicated; ⑤The structure of the conductive rod mechanism is fixed and single, and the adjustability and adjustability are not good. Good, poor process adaptability; ⑥ Only implemented for narrow gap arc welding

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