A magnetically controlled k-tig welding torch based on water-cooled permanent magnets

Abstract

The invention belongs to the technical field of K-TIG welding guns and discloses a magnetic control K-TIG welding gun based on water-cooled permanent magnets. The magnetic control K-TIG welding gun mainly comprises a cover body and a holding body connected to the lower portion of the cover body. The cover body and the holding body form a closed space and are fixed to the gun head of the welding gun. The radially and evenly distributed permanent magnets are arranged in the closed space, and water cooling devices are arranged around the permanent magnets. According to the magnetic control K-TIG welding gun, the permanent magnets are used for replacing electromagnets to construct a circular magnetic field to compress K-TIG welding electric arcs, thus the restraining effect and penetrability of the electric arcs can be enhanced; and meanwhile, the water cooling devices are arranged to wrap the permanent magnets so as to achieve the purposes of in-time cooling and demagnetization reduction, thus the stability of the obtained magnetic field is improved, and the electric arcs are restrained and controlled better.

Description

technical field [0001] The invention belongs to the technical field of a K-TIG welding torch, and in particular relates to a magnetically controlled K-TIG welding torch which increases an adjustable magnetic field and shrinks an arc column. Background technique [0002] TIG welding can achieve high-quality welding, but the existing TIG welding arc energy density is low, which limits its welding efficiency. Based on the traditional TIG welding torch, a new perforation welding process method is obtained through the cathode shrinkage effect with a large welding current, which is called CF-TIG welding or K-TIG welding; the principle is that in the TIG welding process, the welding arc is established Between the tungsten electrode (cathode) and the workpiece molten pool (anode), the adhesion form between the arc and the cathode is mainly determined by the thermal electron emission behavior of the cathode, and the thermal electron emission of the cathode mainly occurs in the tungst...

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Problems solved by technology

[0010] What the present invention aims to solve is that when the K-TIG torch welds metal materials with low thermal conductivity, as the thermal conductivity of the material increases, the stability of the small holes decreases. The technical problem of penetrating small holes and obtaining qualified welds with a small process window is to provide a magnetically controlled K-TIG welding torch based on water-cooled permanent magnets. Permanent magnets are used instead of electromagnets to construct a circular magnetic field to compress the K-TIG welding arc, which can increase The confinement effect and penetration ability of the arc; at the same time, a water cooling device is installed to surround the permanent magnet to achieve timely cooling and reduce demagnetization, thereby improving the stability of the obtained magnetic field and better restraining and controlling the arc

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