Análisis de fallas de soldadura de metales por ultrasonidos

Dar calor:

El cabezal de soldadura puede experimentar ciertos fenómenos de calentamiento durante la operación, lo que es causado por la pérdida mecánica del material en sí y la conducción de calor del componente de soldadura.  El estándar para determinar si el calentamiento del cabezal de soldadura es normal es emitir continuamente ondas ultrasónicas durante más de media hora sin carga (es decir, sin contacto con la pieza de trabajo), y la temperatura no debe exceder los 50-70 ℃. Si el calentamiento es severo, indica que el cabezal de soldadura se ha dañado o que el material no está calificado y debe reemplazarse.

Aullido:

Cuando el cabezal de soldadura aúlla durante la operación, se deben analizar las siguientes razones:

1. ¿Está flojo el tornillo de instalación?

2. Si hay grietas en el cabezal de soldadura.

3. Si el cabezal de soldadura está en contacto con objetos que no deberían estar en contacto.

Overload:

When the generator emits an overload alarm, the following steps should be for inspection:

1. No-load test, if the working current is normal, it may be due to the welding head coming into contact with objects that should not be in contact or the parameter adjustment between the welding head and the welding base malfunctioning.

2. When the no-load test is abnormal, the welding head should be first observed for cracks and firm installation. Then, the welding head should be removed and the no-load test should be carried out to eliminate whether there is a problem with the transducer and amplitude converter. Step by step, the problem should be resolved. After ruling out the possibility of malfunctions in the transducer and amplitude converter, remove and replace the new welding head for judgment.

3. Sometimes, there may be situations where the no-load test is normal but cannot work properly, which may be due to changes in the internal sound energy components such as welding heads, resulting in poor sound energy transmission. Here is a relatively simple judgment method: hand touch method. When working normally on the surface of the welding head or amplitude converter, the amplitude is very uniform, and the hand feels as smooth as velvet. When the sound energy transmission is not smooth, there will be bubbles or burrs when touched by the hand. At this time, the elimination method should be used to eliminate the problematic components. When the generator is not working properly, the same situation can occur because normally, when detecting the input waveform of the transducer, it should be a smooth sine wave. This phenomenon can also occur when there are spikes or abnormal waveforms on the sine wave. In this case, another whole acoustic component can be replaced to distinguish.