... panel welding machine 1. auto weld, ultrasonic 2. PLC control,high precision 3.30~70 seconds/pc Automobile Door Panel ... is ultrasonic welding for large size or irregular workpiece, PLC control and high precise action; high precision linear slide rail structure ... way as spot welding or riveting of whole piece.PLC programmable microcomputer control system, parameter settings at the HMI screen which is ...