Central negative-pressure arc welding device and method

An arc welding and negative pressure technology, applied in arc welding equipment, welding equipment, electrode accessories, etc., can solve the problems of high welding environment requirements, high technical requirements for workers, narrow welding process window, etc., and achieve simple and convenient adjustment, broaden the Process window, effect of increasing penetration

Active Publication Date: 2015-01-28
BEIJING UNIV OF TECH
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Problems solved by technology

[0008] However, laser welding and electron beam welding have expensive welding equipment, high requirements on the external welding environment, high equipment operating costs, small beam diameter, and particularly strict requirements on joint assembly; and plasma arc welding also has a relat

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  • Central negative-pressure arc welding device and method

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Embodiment Construction

[0026] Embodiments of the present invention will be specifically described below with reference to the drawings. As shown in the figure, the central negative pressure arc welding device mainly includes a welding power supply and its control system 1, a non-melting electrode welding torch 2, a hollow tubular electrode 3, a welding workpiece 4, an air extraction device 5, a pressure release device 7, and a pressure display device 8. Valve 10, in which air extraction device 5——air guiding line A 6——pressure release device 7——air guiding line B 9——valve 10——air guiding line C 11——connecting joint 12——hollow tubular The electrode 3 forms a gas pipeline, and the pressure display device 8 is connected with the pressure release device 7; welding power source and its control system 1——welding cable B 14——welding workpiece 4——non-melting electrode welding torch 2——welding cable A 13——Welding power supply and its control system 1, which constitutes an electrical circuit. The gas and wate...

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Abstract

The invention relates to a central negative-pressure arc welding device and method, and belongs to the technical field of welding equipment and methods. An inner cavity of a hollow tubular electrode and the center of an arc below the hollow tubular electrode enter a negative-pressure state by virtue of an air extraction device, the radial pressure gradient of the arc from the outside to the center of the arc is increased, and under the action of external atmospheric pressure, the arc is constricted into a high-energy density restrained arc. The magnitude of central pressure of the arc is regulated to regulate the magnitude of restraint intensity, energy density and voltage of the arc, thereby well controlling the welding heat input and the forming of a welding seam. According to the welding device and the welding method, high stability of a TIG (tungsten inert gas) welding arc and high energy density of a plasma arc are integrated, so that the defects of complexity in parameter regulation, narrow process window and the like of a plasma arc welding process are overcome, the detects of small welding penetration and low welding efficiency of the conventional TIG arc are overcome, the welding speed is greatly accelerated, the welding efficiency is greatly improved, and high-quality and efficient welding is unified.

Description

technical field [0001] The invention relates to a central negative pressure arc welding device and method, and belongs to the technical field of welding equipment and applications. Background technique [0002] In 1907, the Swedes invented arc welding with electrodes, applied it to the connection of metals, and established the foundation of welding technology. Welding technology is developing rapidly. Today, in various forms of metal connection technology, arc welding technology has been widely used to produce various high-quality connections. In modern manufacturing and industrial production processes, welding technology has become a It is an important metal forming process widely used in the automotive, marine, marine, aerospace and other industrial sectors. With the continuous improvement of the needs of all walks of life, increasing the productivity of welding production, ensuring product quality, and realizing the automation and intelligence of welding production are g...

Claims

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Application Information

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IPC IPC(8): B23K9/26B23K9/167
CPCB23K9/167B23K9/26
Inventor 蒋凡王建新陈树君白立来王立伟
Owner BEIJING UNIV OF TECH
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