The utility model relates to a portable steel structure
welding mask applied to the technical field of
welding auxiliary tools, which comprises a
mask body and a light-transmitting mirror, the light-transmitting mirror is provided with an adjuster, in the normal
welding process, the
mask body and the light-transmitting mirror are easy to damage due to spark
sputtering, and therefore when the light-transmitting mirror is damaged, the light-transmitting mirror can not be damaged. A starting button is pressed down, and an adjusting knob inserted into one side of an adjuster is rotated to control a driving rod connected to the adjusting knob to drive a driving piece to move, so that the limiting force of the driving piece on a driving fluted disc is relieved, and a double-shaft driving motor drives a
threaded rod to rotate; the replacement piece matched with the
threaded rod slides in the sliding groove and jacks off the light-transmitting lenses placed in the light-transmitting mirror, the light-transmitting lenses are installed in the light-transmitting mirror before the welding mask is used, the elastic soft
cushion installed in the light-transmitting mirror extrudes the light-transmitting lenses to enable the light-transmitting lenses to be stretched and not prone to deviation, the structure is more stable, the working efficiency is improved, and meanwhile the welding mask is convenient to use. The protection effect is greatly enhanced, and the service life is prolonged.