... and save labour YP-D21 20Khz Ultrasonic Metal Welding Machine By using the ultrasonic high frequeccy vibration principle, ... press with the help of punch press ,forging machine or other equipments. 2.Smelting:Mainly aims to ... hardware and tolls, automobile and motorcycle, machine tools, hardware parts and machine parts, hardware mold, etc.4.Welding/ ... the size of the horn )GeneratorV6.0 Digital Generator