Device and method for assisting underwater wet welding by adding ultrasound laterally
A wet welding, ultrasonic-assisted technology, applied in the direction of welding equipment, welding accessories, arc welding equipment, etc., can solve the problems of unfavorable droplet smooth transition, poor controllability, increased arc ionization, etc., to achieve good forming effect and low impurity content The effect of lowering and shortening time
Active Publication Date: 2019-12-06
HARBIN INST OF TECH AT WEIHAI
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Problems solved by technology
The current research mainly focuses on the improvement and optimization of welding materials; controlling the adverse effects of bubble floating on droplet transfer; using shielding gas to increase arc ionization; using ultrasonic waves in the same direction as the welding wire to improve arc stability and other methods. Higher quality welding performance is obtained, but none of them fundamentally solves the welding quality by controlling the transfer of droplets. Although some people improve the transfer of droplets based on the pulse current method, the controllability of this method is poor, and not every pulse can be aligned with the previous droplet, which is obviously not conducive to the smooth transition of the droplet
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[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so as to help understand the content of the present invention. The methods used in the present invention are conventional methods unless otherwise specified; the raw materials and devices used are conventional commercially available products unless otherwise specified.
[0030] Such as figure 1 As shown, the present invention provides a side plus ultrasonic assisted underwater wet welding device, which includes an ultrasonic device, a welding torch device and an adjustable clamping device, the ultrasonic device is located on one side of the welding torch device, and the ultrasonic device The front end and the front end of the welding torch device form a certain angle, and the tail end of the welding torch device and the tail end of the ultrasonic device are connected through an adjustable clamping device, and the clamping between the welding tor...
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The invention provides a device and method for assisting underwater wet welding by adding ultrasound laterally. The device comprises an ultrasonic device and a welding gun device, and is characterizedin that the ultrasonic device is located on one side of the welding gun device, a certain angle is formed between the front end of the ultrasonic device and the front end of the welding gun device, and the tail end of the welding gun device and the tail end of the ultrasonic device are connected through an adjustable clamping device. During working, the distance between the welding gun device anda welding workingpiece, the distance between the ultrasonic device and the welding workpiece and an included angle between the welding gun device and the ultrasonic device are adjusted, an ultrasonicradiation end surface is located on the opposite side of a molten pool, and ultrasonic waves are applied to molten drops, so that the molten drops with small diameters and high frequencies can directly enter the molten pool to ensure that the molten drops are stable in transition, splashing is reduced, and the welding seam forming effect is good.
Description
technical field [0001] The invention belongs to the technical field of underwater wet welding, and in particular relates to a device and method for underwater wet welding assisted by side-applied ultrasound. Background technique [0002] Self-shielding flux-cored wire underwater wet welding technology has many advantages such as convenient operation, high efficiency, low cost and high quality, and is one of the important development directions of underwater automation and intelligent welding. In this welding process, the welding wire and the workpiece are directly placed in water, and the arc combustion is carried out in the bubbles mainly formed by the thermal decomposition, evaporation or reaction of the core gas-generating agent and water. Due to the influence of non-axial large droplet repulsion transition and short-circuit transition, the droplet transitions with a larger size and lower frequency, and the falling trajectory presents a random and non-axial shape, resulti...
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IPC IPC(8): B23K9/32B23K9/00
CPCB23K9/32B23K9/00B23K9/0061
Inventor 郭宁成奇陈昊付云龙徐昌盛张欣
Owner HARBIN INST OF TECH AT WEIHAI