The invention discloses a
magnesium alloy laser-ultrasonic double-side
welding method and relates to a double-side
welding method. The
laser-ultrasonic double-side
welding method comprises the following steps: firstly, cleaning and clamping a to-be-welded workpiece, setting the ultrasonic and
laser position, further setting related
processing parameters to carry out welding; compared with a conventional
argon tungsten-
arc welding (TIG welding) method, the laser-ultrasonic double-side welding method disclosed by the invention has the advantages that the welding speed is higher, the
magnesium alloy welding efficiency is improved, deficiencies like pores,
slag inclusion and hot cracks which are easily produced in welding joints, as well as incomplete penetration are reduced, so that the
welding joint can meet the using requirements; compared with the one side
ultrasonic assisted laser welding method, the laser-ultrasonic double-side welding method disclosed by the invention further has the advantages that the
temperature gradient in the
molten pool is smaller under the actions of the heat sources, namely laser and ultrasonic, due to the fact that the ultrasonic wave is applied onto the back surface of a welding seam, the
welding deformation and the thermal stress produced during the
welding process are smaller, the tendency that the
welding joint produces hot cracks within a brittle temperature range is effectively reduced, and the
mechanical property of the welding seam is further improved.