Can metals and plastics be welded by ultrasonic waves？

Metal and plastic cannot be directly welded, but ultrasonic riveting can be used to connect metal and plastic parts. Generally, the connection between metal parts and plastic parts of electronic appliances and automobile parts is ultrasonic riveting welding technology. The metal parts are perforated, and the plastic parts have small cylinders passing through the metal parts. The plastic cylinders are welded into mushroom heads by ultrasonic welding machine to achieve the connection effect.