Double-side reciprocating sound field auxiliary laser welding device and method

The invention discloses a double-side reciprocating motion sound field auxiliary laser welding device and method.The double-side reciprocating motion sound field auxiliary laser welding device comprises a laser welding mechanism, a reciprocating mechanism and two sets of ultrasonic mechanisms, the laser welding mechanism comprises a laser device and a laser power source, and the laser device is connected with the laser power source; the two ultrasonic mechanisms are installed on the two sides of the laser through the reciprocating mechanism and are symmetrically arranged relative to the axis of the laser. And during welding, the reciprocating mechanism drives the two groups of ultrasonic mechanisms to synchronously move towards or away from each other at the same speed. A dynamic sound field is formed around the welding seam by means of the two sets of reciprocating ultrasonic mechanisms, meanwhile, the purposes of promoting air hole overflow, refining the structure and eliminating the residual stress are ach