夹紧环
一种对中于增幅杆本体波节处的圆柱形环组件。夹紧环将叠堆支撑在焊接机架上，并把所需的焊接力从机架传递到叠堆，同时防止声能从叠堆泄漏到机架。
夹紧环通常通过 O 形圈与增幅杆本体隔振。在这种情况下，夹紧环通常设有某种防止其绕增幅杆本体转动的机构，否则变幅杆将无法与被焊接工件保持正确的旋转对中。
在特殊情况下，夹紧环可以刚性固定在增幅杆本体上，以提供额外的刚度和精度。见刚性安装增幅杆。
另见波节法兰。
Clamp ring
A cylindrical ring assembly centered at the node of the booster body. The clamp ring supports the stack in the welding stand and transmits the required welding force from the stand to the stack, while preventing the escape of acoustic energy from the stack to the stand.
The clamp ring is often isolated from the booster body by O-rings. In this case, the clamp rings usually have some means to prevent the rings from rotating about the booster body. Otherwise, the horn would not maintain proper rotational alignment to the part that is being welded.
In special cases, the clamp ring may be rigidly attached to the booster body in order to provide additional rigidity and accuracy. See rigid mount booster.
Also see nodal flange.