1. Misunderstanding of ultrasonic output power

The ultrasonic output power is the same as the diameter and thickness of the piezoelectric ceramic sheet, material, and design process. When the transducer is shaped, the maximum power is also finalized. It is a complicated process to measure the output energy. It is not that the larger the transducer, the more power tubes used in the circuit, the greater the output energy. It requires a very complex amplitude measuring instrument to accurately measure its amplitude. Since most users do not know much about supersonic waves, Coupled with the misleading of the sales staff, it gave consumers a wrong understanding that the amount of electrical energy consumed does not reflect the size of the output ultrasonic power. For example, the low longitudinal energy produced but the large current consumption can only show that the efficiency of the equipment is low, but the power is not large. Say.

2. Misunderstanding of welding principle

Quite a few people who have been engaged in ultrasonic welding for many years have a misunderstanding about the transmission of ultrasonic energy. It is a misunderstanding that sound waves are welded on the contact surface. The real welding principle is that after the transducer converts electrical energy into mechanical energy, it passes through the workpiece. The material molecules conduct the conduction, and the acoustic resistance of sound waves in solids is much smaller than that in the air. When the sound waves pass through the joints of the workpiece, the acoustic resistance in the gap is large, and the heat generated is quite large. A certain pressure is applied to weld the seams, and the other parts of the workpiece will not be welded due to low acoustic resistance and low temperature. The principle is similar to Ohm's law.

3. Misunderstanding of welding 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. Whether the design is reasonable or not directly affects the mold's efficiency, life span, and product qualification rate. In severe cases, it will burn out the generator directly. The material of the mold is generally magnesium-aluminum 7075, and some people use inferior materials to reduce costs. Regular mold manufacturers have a set of strict inspection procedures for incoming materials, and the processing dimensions are processed after computer software simulation and verification. Quality is guaranteed. These processes cannot be done in general workshops. The molds made without reasonable design will not have obvious reaction problems when welding small workpieces, and various drawbacks will appear when the power is high. In severe cases, the components will be directly damaged.