PC series ultrasonic ultrasonic spot welder is a advanced technical equipment that transforms the high frequency electrical energy into mechanical vibration energy through the high frequency electricity energy, and acts on workpiece, produces high frequency friction between two surfaces of the workpiece, welds together until gives off the heats between two workpiece surfaces. Can carry on spot and strip welding to the thin material of the electric conduction metal such as the copper, the silver, the chromium nickel and so on, also applys widely in spot and strip welding to the silicon-controlled chip down-lead, the fast fuser, the electric appliance down-lead terminal, the lithium ion, the nickel hydrogen, the nickel cadmium battery pole-piece & pole-ear and so on punctual, the strip shape welding.