DC welding arc magnetic deflection blow control method using external magnetic field expansion device
A technology of external magnetic field and control method, which is applied in the direction of welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of poor application, inflexible and convenient operation, and unsatisfactory effect, and achieve the elimination of arc magnetic bias The effect of blowing side effects
Active Publication Date: 2021-03-09
JIANGSU MARITIME INST
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Problems solved by technology
[0013] The above methods and some patented technologies for controlling spatter rate by external magnetic field, as well as various researches at home and abroad to overcome the influence of magnetic deflection blow on manual arc welding welding arc, are generally not very flexible and convenient to operate, and the effect is not up to the mark. to the ideal state
It is not easy to use in actual operation, and it cannot effectively expand the distribution of magnetic force lines in the magnetic deflection blowing. The effect of overcoming the arc magnetic deflection blowing is good and bad, the effect is unstable, and the welding arc magnetic field cannot be evenly distributed.
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[0035] The present invention is described in further detail now in conjunction with accompanying drawing.
[0036] Such as image 3 As shown in the figure, the two ends of the weld seam are the arc starting section and the arc extinguishing section of the welding seam respectively. With the traditional welding method, the inherent magnetic field formed by the current during welding will form an arc starting section and an arc extinguishing section of the weld seam. Interference, that is, the end of the weld will pass through the magnetic induction lines of the magnetic field and be in the magnetic field. This magnetic field will cause the welding arc to produce different degrees of magnetic deflection, which will lead to extreme instability of the welding arc, and X-ray images inside the welding exist. Serious quality defects prevent effective quality assurance in this area. Therefore, a new type of welding process is needed to ensure that the entire weld is not inside the ma...
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Abstract
The invention relates to a direct-current welding arc magnetic bias blowing control method utilizing additional magnetic field expanding devices. According to the method, the magnetic field expandingdevices are arranged on the two sides of a welded part which is assembled and positioned, the positive pole and the negative pole of the output end of a direct-current welding machine are connected with a welding rod and the magnetic field expanding devices, so that the magnetic field formed by welding current in the welding process is located on the periphery of a weld joint, an electromagnetic field interference is not formed for the arc-shaped section of the weld joint and the arc of the arc-extinguishing section area, and the welding quality defect caused by arc magnetic bias can be eliminated.
Description
technical field [0001] The invention relates to the field of welding technology, in particular to a DC welding arc magnetic deflection control method using an externally applied magnetic field expanding device. Background technique [0002] As we all know, in the DC welding process, due to the inherent welding magnetic field, the welding arc in the arc starting section and arc extinguishing section of the weld seam will be affected by the magnetic deflection blow, which will have a negative impact on the welding quality. Among the existing methods for controlling the magnetic deflection of the welding arc, the methods and measures generally adopted mainly include: [0003] 1. Generally, AC welding is used, and the use of AC power can significantly reduce the influence of magnetic blowing on the weld. High-speed alternating current will generate eddy currents, and the magnetic field generated by eddy currents will greatly weaken the magnetic field strength that causes magneti...
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IPC IPC(8): B23K9/08
CPCB23K9/08
Inventor 张强勇刘桂香谢荣朱征宇刘军华周建桃王晓明
Owner JIANGSU MARITIME INST