1) Misunderstanding in the principle of welding
There are quite a few people who have been engaged in ultrasonic welding for many years. There is a misunderstanding about the transmission of ultrasonic energy, which is considered to be the sound wave welding on the contact surface. In fact, this is a misunderstanding.
2) Mistakes in workpiece materials:
Ultrasonic plastic welding machines are also required for the material of the workpiece to be welded. Not all materials can be welded.
3) Process misunderstanding of welding workpiece
Ultrasonic energy is an instantaneous burst, the weld should be a point or line, and the distance of transmission must conform to the ultrasonic welding method.
4) Ultrasonic output power misunderstanding
The output power of the ultrasonic wave is determined by the diameter and thickness of the piezoelectric ceramic piece, the material, and the design process. Once the transducer is shaped, the maximum power is also fixed. Measuring the output energy is a complicated process, not a change. The larger the energy device, the more power transistors the circuit uses and the greater the output energy.
5) Mistakes in ultrasonic welding machine selection
How much output power is used, the oscillation frequency and the amplitude range should be considered according to the material of the workpiece, the area of the wire bond, whether there are electronic components in the workpiece, whether it is airtight or not. I mistakenly think that the bigger the power, the better. This is also a misunderstanding.
6) Misunderstanding of the welding mold structure
There are many types of ultrasonic molds (HORN). The shape of the workpiece determines the shape of the mold. However, the size, curvature and material of each part must be strictly calculated. Some people mistakenly think that it is just a metal block.
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