Device and method for recycling selective laser melting gradient powders

A selective laser melting gradient powder recovery device, comprising an ultrasonic powder suction device (1), a vertical support frame (2), a screening device (10), a waste material recovery device, a powder conveying pipe (13), a cooling device (14), and a controller,

• wherein the ultrasonic powder suction device (1) is mounted on the vertical support frame (2);
• the vertical support frame (2) is mounted on the printing platform (3);
• a top of the screening device (10) is connected to the ultrasonic powder suction device (1) through the powder conveying pipe (13), which has a helical powder conveying pipe (16) with a cooling device (14);
• a metal powder sensor is installed in the helical powder conveying pipe (16), which is configured to detect whether the powder texture in the helical powder conveying pipe (16) is metallic or not and send signals to the controller;
• at least one screen mesh is installed inside the screening device (10) to divide the shell (1007) into at least two areas, with an upper area connected to the waste material recovery device and a lowest area to a powder storage bag;
• and
• the controller is connected to the ultrasonic powder suction device (1), the screening device (10), the waste material recovery device, the metal powder sensor, and cooling device (14), respectively.