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

Active Publication Date: 2019-07-26
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a narrow-gap non-axisymmetric rotating tungsten electrode GTAW+pulse laser composite welding method that improves the non-uniform non-axisymmetric rotating tungsten arc melting welding wire, the purpose is to solve the problem of GTAW narrow gap welding It can solve the problem of insufficient penetration of the side wall at the same time, and can solve the problems of non-axisymmetric rotating tungsten arc melting welding wire, low welding process deposition efficiency, and slow welding speed.

Method used

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  • Non-axisymmetric rotary tungsten electrode GTAW and pulse laser composite welding method

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Embodiment 1

[0033] A non-axisymmetric rotating tungsten electrode GTAW and pulse laser composite welding method, the welding system based on it includes a pulse laser system, a welding torch system, and a wire feeding device; the 9% Ni steel with a thickness of 36mm to be welded in this embodiment has a U-shaped slope Narrow gap welding at 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 pole, and one end of the tungsten pole is Non-axisymmetric tip; the tungsten pole rotates with the rotation of the central rotation axis. Due to the asymmetry of its rotation, the arc can always periodically heat the substrate and the metal on both sides according to the minimum voltage principle; while the tungsten pole controlled by the motor control box ...

Embodiment 2

[0044] A non-axisymmetric rotating tungsten electrode GTAW and pulsed laser composite welding method, the basic system of which is as described in Embodiment 1, the difference is that the welding system based on it also includes a self-adjusting system, and the self-adjusting system includes a visual sensor detection system , Control system, the visual sensor detection system is used to detect the size of the tungsten electrode arc to reflect the position of the rotating arc, the visual sensor detection system includes an industrial high-speed camera; the control system is used to receive the feedback of the arc position and adjust the power of the pulse laser.

[0045] Step (4) also includes setting up an industrial high-speed camera in front of the welding 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, adjusting the frame rate of the camera to 3000fps, and the expos...

Embodiment 3

[0047] A non-axisymmetric rotating tungsten pole GTAW and pulse laser composite welding method, the equipment and steps are as described in Example 1, the difference is that the waveform of the pulse laser is a sinusoidal wave, and the peak and base values ​​remain unchanged.

[0048] In this embodiment, the position of the non-axisymmetric rotating tungsten arc can be detected in real time by the visual sensor, and the power of the pulsed laser can be self-adjusted according to the set waveform. When the high-speed camera detects that the cross-sectional area of ​​the arc column shrinks, the rotating arc reaches the welding wire. When the rotating arc reaches the two side walls and the position away from the welding wire end and the middle position, the pulse laser power increases. 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, make the droplet fall down fas...

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Abstract

The invention relates to a non-axisymmetric rotary tungsten electrode GTAW and pulse laser composite welding method, and belongs to the technical field of GTAW welding. A based welding system comprises a pulse laser system, a welding gun system and a wire feeding device. The method comprises the following steps: providing pulse laser by the pulse laser system, arranging a laser unit between the wire feeding device and a welding gun, periodically providing pulse laser to irradiate a welding wire by matching with rotation of a non-axisymmetric tungsten electrode. The problems such as uneven smelting for non-axisymmetric rotary electric-arc welding wires are solved, thermal input of welding is reduced, quality of welding seams is improved, and deposition efficiency is remarkably improved.

Description

technical field [0001] The invention relates to a self-adjusting non-axisymmetric rotating tungsten pole GTAW and pulse laser composite welding method. The first heat source is a pulse laser as an auxiliary heat source to melt welding wire, and the second heat source is produced by a self-developed non-axisymmetric tip rotating tungsten welding torch. The invention relates to a composite heat source welding system of a rotating arc, which is used to improve the non-uniform phenomenon of a non-axisymmetric rotating tungsten arc melting welding wire, and belongs to the technical field of GTAW welding. Background technique [0002] National nuclear power, ships, and major projects have put forward more and more urgent demands for low-deformation, high-efficiency, and high-quality welding technologies for thick-walled components. Narrow gap welding technology realizes high-efficiency and high-quality welding of thick plates through fully automatic welding equipment and narrow ga...

Claims

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Application Information

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IPC IPC(8): B23K26/348B23K26/70
CPCB23K26/348B23K26/702
Inventor 贾传宝魏斌吴玮武传松
Owner SHANDONG UNIV
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