The invention discloses a network
transformer and a
laser welding method thereof. The network
transformer comprises a linear
ceramic flat plate and a
ceramic skeleton which are both made of
oxide ceramic matrix composite materials. The attaching positions of the linear ceramic flat plate and the ceramic skeleton are welded into a whole through
laser. The method comprises the following
laser steps:S1,
grinding and
polishing an area where the ceramic flat plate and the ceramic skeleton are about to be combined together, and
grinding the area into a smooth
welding crystal face; S2, positioning the ceramic flat plate and the ceramic skeleton in a laser beam
irradiation area, adopting the pulse oscillation mode of a laser device with a large output power
peak value, irradiating a non-focused laser beam on the above combination area for preheating purpose, utilizing the focused laser with
high energy density for
irradiation purpose, fusing and
welding together the combination area of the ceramic flat plate and the ceramic skeleton; S3, naturally cooling the ceramic flat plate and the ceramic skeleton to form a whole piece. According to the invention, the high-temperature fusion weldingof the laser is utilized, so that the skeleton of the
transformer is permanently combined without the problem of falling off. Meanwhile, additional structural parts are omitted, and the structure is simplified.