Device for controlling quality of wire arc additive forming through feedback of acoustic emission

A device for controlling quality of wire arc additive forming through feedback of acoustic emission, the device comprising:

• three systems connected in a closed loop, the three systems being a wire arc additive system configured for forming solid parts, an acoustic emission acquisition and identification system configured for monitoring a wire arc additive process on line and analyzing types and sizes of the resulting defects, and a feedback control system 6 configured, according to said monitoring and analyzing, for providing timely feedback to the wire arc additive system by a PID (Proportional-Integral-Differential) circuit;
• wherein the wire arc additive system comprises:
• a wire arc forming worktable;
• a robotic arm arranged on one side of the wire arc forming worktable;
• an argon arc welding gun connected to an end of the robotic arm;
• a mainframe box connected with the robotic arm;
• a teach pendant connected with the mainframe box in a coordinated manner;
• a welding machine connected with the mainframe box;
• a wire feeder connected with the welding machine in a coordinated manner;
• a shielding gas connected with the welding machine in a coordinated manner;
• and
• a water tank connected with the mainframe box;
• wherein the acoustic emission acquisition and identification system comprises:
• a computer;
• an acoustic emission sensor, the acoustic emission sensor being connected to the wire arc forming worktable and being connected with the preamplifier;
• an acoustic emission signal acquisition device connected with the computer;
• and
• a preamplifier connected with the acoustic emission signal acquisition device;
• and wherein the feedback control system comprises a PID (Proportional-Integral-Differential) circuit, said PID circuit comprising a proportional adjustment element P, an integral adjustment element I, and a differential adjustment element D;
• said feedback control system being configured, according to different processes of the PID circuit, to send corresponding feedback instructions to the wire arc additive system, each of said feedback instructions being either an instruction to maintain the printing parameters, an instruction to change the printing parameters, or an instruction to cease wire arc additive forming and raise an alarm.