Round sonotrode
A round sonotrode has a sonotrode body which has a receiving space for a workpiece at its front end. The receiving space is surrounded by an annular web which has a weld surface at its front end face. A workpiece holder is furthermore provided in the receiving space.
1. A round sonotrode, comprising:
a sonotrode body having a front end and a receiving space for a workpiece at the front end, the receiving space being surrounded by an annular web, the annular web having a front end face and a weld surface at the front end face, with a workpiece holder being provided in the receiving space,
wherein the sonotrode body has at least one cut-out which connects an outer jacket surface of the sonotrode body to the receiving space, and
a holding element of the workpiece holder is led through the cut-out.
2. The round sonotrode in accordance with claim 1 , wherein the workpiece holder has a centering mandrel.
3. The round sonotrode in accordance with claim 2 , wherein the centering mandrel is movable relative to the sonotrode body against a restoring force.
4. The round sonotrode in accordance with claim 3 , wherein the restoring force is provided by one of a spring and a pneumatic cylinder.
5. The round sonotrode in accordance with claim 1 , wherein a sensor is integrated therein which detects at least one of a presence of a workpiece at the workpiece holder and a correct orientation of a workpiece at the workpiece holder.
6. The round sonotrode in accordance with claim 1 , wherein the workpiece holder has a mechanical coding element which ensures a correct orientation of a workpiece at the workpiece holder.
7. The round sonotrode in accordance with claim 1 , wherein the cut-out has a closed outer contour.
8. The round sonotrode in accordance with claim 1 , wherein the cut-out has an outer contour open toward the weld surface.
9. The round sonotrode in accordance with claim 1 , wherein the cut-out is provided in a base of the round sonotrode.
10. The round sonotrode in accordance with claim 1 , wherein the workpiece holder is supported in a vibration-decoupled manner relative to the sonotrode body.
11. The round sonotrode in accordance with claim 1 , wherein the weld surface comprises members selected from the group consisting of: sonotrode needles, sonotrode pins, and sonotrode projections.
12. The round sonotrode in accordance with claim 11 , wherein the members are arranged in two to four rings.
13. The sonotrode in accordance with claim 12 , wherein the members are arranged in two to fourconcentric rings.
14. The round sonotrode in accordance with claim 1 , wherein the sonotrode body is hollow cylindrical over at least 50% of its longitudinal extent.
15. The round sonotrode in accordance with claim 1 , wherein a clamping element with which a workpiece can be temporarily fixed is provided at the workpiece holder.