Scanning welding torch

Abstract

A scanning welding torch with electric motor to drive the electric conducting rod to rotate and generate rotary welding arc is disclosed. Said motor is installed in the casing. The integrated adapter for electric cable, welding wire and protecting gas tube is sealed in the upper part of said casing and electrically connected to the carbon brush dynamically fit with the electric conducting rod which passes through and is fixed to the rotor of motor. The lower end of said electric conducting rod is extended outside the bottom of casing and fixed to the electric conducting mouth via rotary joint. Its advantages are simple structure, step regulation, and high performance stability.

Description

Technical field [0001] The invention relates to a welding device, in particular to a scanning welding torch driven to rotate by a motor. Background technique [0002] Scanning welding torch is a kind of mechanical method to make the welding arc swing in the direction perpendicular to the welding process, and the welding torch itself or the conductive rod in the welding torch makes a transverse scanning movement. Existing rotary scanning welding torches all realize the garden cone swing mechanism with the conductive rod as the busbar through spherical bearings, such as the "high-speed rotary arc welding equipment" patented by Japan Steel Tube Co., Ltd. in Chiyoda District, Tokyo, Japan on April 29, 1987 (Application No.: 87103245, Examination Announcement No.: 1008611, Examination Announcement Date: July 4, 1990, Publication / Announcement No.: 1022121, Publication / Announcement Date: November 16, 1988, Authorization Date: October 24, 1990 Japan), it is a rotary arc welding equ...

AI Technical Summary

Problems solved by technology

However, the above two mechanisms have the following disadvantages: ①Rotary scanning is realized by the eccentric sleeve driving the conductive rod to rotate around the axis of the motor. The conductive rod is restrained by welding wire and wires and will not rotate around its own axis, avoiding the twisting of the welding wire and the winding of the cable

However, due to the large weight and unbalance of the eccentric sleeve, it will generate large vibration during rotation, which will affect the stability of the welding process and cause high noise, especially when the scanning amplitude and rotation speed are large, the impact is more serious

② The amplitude of the rotary scanning is realized by adjusting the relative position of the inner and outer eccentric sleeves supporting the conductive rod. The whole adjustment mechanism is complicated, requiring a large axial size of the casing, increasing the size of the welding torch, requiring high manufacturing precision, and inconvenient adjustment

However, the connection between the welding cable and the conductive rod and the feeding of the welding wire will cause large jitter due to the swing of the conductive rod.

④The shielding gas is connected externally, the gas transportation and regulation are complicated, and there are many connecting pipelines, which affect the welding operation

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