| 摘要 |
The ultrasound sonotrode assembly (16) has an axial (22) recess (28) with open edges, which faces the workpiece (12) and/or anvil (18). A plunger (36) located in the recess, can be moved between two positions. The first is a resting position, in which it is retracted back into the sonotrode. The second is an extended, working position, in which it partially projects from the sonotrode. The recess is a stepped bore in which plunger movement is limited by a stop. The recess is circular or polygonal in cross section. The plunger is guided in the recess, with virtually no play. It is carried fluid-tight, especially pneumatically-tight in the recess. The recess forms a pressure chamber (42), and includes a connection (44) for a fluid. The connection is located at a node of oscillation (48) and leads to a fluid source and/or a pressure sensor with a pressure regulator. The force (Fs) with which the plunger is advanced, exceeds that (Fi) with which it is forced out of the recess. The surface of the plunger which contacts the workpiece is structured. The plunger is constructed as a stamping tool. |
