Non-axisymmetric rotary tungsten electrode GTAW and pulse laser composite welding method
A pulsed laser, axisymmetric technology, used in laser welding equipment, welding equipment, metal processing equipment, etc. Uniformity and other problems, to achieve the effect of improving welding quality and manufacturing efficiency, improving energy efficiency, and increasing the volume of deposited metal
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[0032] Example 1:
[0033] A non-axisymmetric rotating tungsten electrode GTAW and pulse laser hybrid welding method, the welding system based on includes a pulse laser system, a welding torch system, and a wire feeding device; the 9% Ni steel with a thickness of 36mm welded in this embodiment has a U-shaped slope Narrow gap welding of the mouth.
[0034] The welding torch system includes a central rotating shaft, a motor system, and an external motor control box. The external motor control box controls the switch of the motor and the rotation rate of the central rotating shaft. The central rotating shaft is connected to the tungsten electrode, and one end of the tungsten electrode is Non-axisymmetric tip; the tungsten pole rotates with the rotation of the central axis of rotation. Due to the asymmetry of its rotation, the arc can always periodically heat the substrate and the metal on both side walls according to the principle of minimum voltage; and the tungsten pole controlled b...
Example Embodiment
[0043] Example 2:
[0044] A non-axisymmetric rotating tungsten electrode GTAW and pulsed laser hybrid welding method. The basic system is as described in Example 1. The difference is that the based welding system also includes a self-adjusting system, which includes a vision sensor detection system , Control system, the vision sensor detection system is used to detect the size of the tungsten arc to reflect the position of the rotating arc. The vision sensor detection system includes an industrial high-speed camera; the control system is used to receive feedback of the arc position and adjust the power of the pulsed laser.
[0045] Step (4) also includes setting up an industrial high-speed camera from the welding front to collect the arc shape in real time, adjusting the appropriate camera angle so that the arc is in the middle of the field of view, the pixel size is 640*640, the camera frame rate is 3000fps, and the exposure time is 8μs , The aperture size is 1 / 4f. During the we...
Example Embodiment
[0046] Example 3:
[0047] A non-axisymmetric rotating tungsten electrode GTAW and pulsed laser hybrid welding method. The equipment and steps are as described in Embodiment 1, except that the waveform of the pulsed laser is a sine wave, and the peak value and base value are unchanged.
[0048] In this embodiment, the position of the non-axisymmetric rotating tungsten arc can be detected in real time by the vision sensor, and the pulsed laser can be self-adjusted according to the set waveform. When the high-speed camera detects the shrinkage of the arc column, the rotating arc reaches the welding wire. The pulse laser power slowly decreases in the end region, and the pulse laser power increases when the rotating arc reaches the two side walls and the position far away from the welding wire end and the middle position. Compared with the steep drop of the square wave, the slow drop of the sine wave can reduce the arc resistance of the arc to the droplet at the end of the welding wire...
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