Ultrasonic automatic film lifting film tearing machine and film tearing method

The invention discloses an ultrasonic automatic film lifting film tearing machine and film tearing method. The ultrasonic automatic film lifting film tearing machine and film tearing method are characterized in that an ultrasonic welding device is adopted to weld the edge of a to-be-torn film onto a strip-shaped fiber film, and then a mechanical clamping hand and a film tearing assembly lifting mechanism move to tear off a workpiece material protective film; the film tearing machine comprises the ultrasonic welding device, the strip-shaped fiber film, a strip supplying disc of the strip-shaped fiber film, a strip collecting disc of the strip-shaped fiber film, guide wheels, a strip-shaped fiber film clamping hand and the film tearing assembly lifting mechanism, and further comprises an electric hot melting carving machine driven by a numerical control cross-shaped sliding table, and the electric hot melting carving machine is used for locally cutting and separating the workpiece material protective film durin