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¿Cómo controlar la amplitud mínima requerida en la soldadura ultrasónica?

  • 2023-04-14

How to control the minimum required amplitude in ultrasonic welding?


Ultrasonic welding is one of the common plastic welding processes in the industry. The three most important parameters of this process: amplitude, duration (welding time) and force (welding pressure). Welding time and pressure are parameters that are easy to adjust later in the process development. The amplitude is often determined in the early stage of development and difficult to change in the later stage, so a suitable amplitude must be designed in advance.


A typical welding head design method is: under the condition of lower than the material fatigue limit stress, the larger the welding head design transformation ratio, the better (that is, the larger the output amplitude, the better). If you need to reduce the amplitude, replace the amplitude modulator with a smaller ratio or adjust the voltage to reduce the amplitude.


How to control the minimum amplitude required:
1. It is impossible to evenly distribute the transformation ratio, that is, the transformation ratio of the welding head and the amplitude modulator are very different. It should be noted that when the welding head and the amplitude modulator have a close ratio, the performance of the ultrasonic triplet (transducer + amplitude modulator + welding head) will be improved.
2. Reduce the welding head transformation ratio by changing the voltage, and at the same time reduce the maximum power output by the electric box. For example, when the amplitude is set to 50%, an electric box with an original output power of 2400W will actually output 1200W. It is easy to cause overload.
3. El uso de gran amplitud causará daños inaceptables a las piezas. Por ejemplo, las grietas en un área de sección transversal pequeña pueden causar quemaduras y pueden dañar las membranas, las membranas de filtro y los componentes electrónicos.


© Derechos de autor: 2025 Hangzhou Altrasonic Technology Co.,Ltd Reservados todos los derechos

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