Ultrasonic welding machine plays an important role in industrial production, especially in mechanical production, which really helps people and solves many problems. Although ultrasonic welding machine is widely used in industrial production, but many people do not pay attention to its use, but also a lot of problems. When using it for welding, according to the material of the workpiece, the area of the welding wire, whether there are electronic components in the workpiece, whether to air-tightness and other factors to choose how much output power, oscillation frequency, amplitude range, do not assume subjectively. Ultrasound welding machine use to have special technical personnel guidance, do not listen to others, problems, find professional technical personnel maintenance.
the area of the ultrasonic joint must meet certain requirements.
When the ultrasonic instantaneous energy is generated, the larger the weld area, the more serious the energy dispersion, the worse the ultrasonic welding effect, even unable to ultrasonic welding. In addition, the ultrasonic wave is transmitted longitudinally, and the energy loss is proportional to the distance. The distance of ultrasonic welding should be controlled within 6 cm_m. Ultrasound welding line should be controlled between 30 - 80 wire is appropriate, the arm thickness of the workpiece can not be less than 2 mm, otherwise it can not be well welded, especially the requirements of airtight products.
Ultrasonic heat resistance must reach the melting point of workpiece.
Ultrasound transducer converts electric energy into machinery and conducts it through the material molecules of workpiece. The acoustic resistance of ultrasonic wave in solid is much smaller than that in air. When ultrasonic welding passes through the workpiece joint, the acoustic resistance in the gap is large and the heat energy produced is quite large. The temperature first reaches the melting point of the workpiece and adds a certain pressure to weld the seam. The other parts of the workpiece are not welded because of their small thermal resistance and low temperature.
The welding head of ultrasonic welding machine must be inspected strictly.
There is a strict inspection procedure for the feed of the normal ultrasonic welding head manufacturer. The processing sizes are processed by computer software simulation and verification. Quality is guaranteed. These procedures are generally impossible to do workshops, such as without reasonable design, the ultrasonic welding head, ultrasonic welding small workpiece, the reaction problem is not obvious, when high-power ultrasound will appear a variety of drawbacks. Serious damage to power components directly.
The output power of the ultrasonic welding machine must be fixed.
The output power of the ultrasonic welding machine is determined by the diameter and thickness of the piezoelectric ceramic sheet, material and design process. Once the ultrasonic transducer is finalized, the maximum power is finalized. Measuring the output energy is a complex process, not the larger the ultrasonic transducer, but the circuit uses ultrasonic. The more power transistors, the greater the output energy, it needs a very complex amplitude meter to accurately measure its amplitude,
Ultrasonic two workpieces must be able to weld
Some of the different materials can be better welded, some can be basically fused, and some are not fused. The melting point of the same material is the same, so it can be welded in principle, but when the melting point of the workpiece to be welded is greater than 350 (?), it is not suitable for ultrasonic welding. Because ultrasonic melts the molecule of the workpiece instantaneously, the judgment is based on three seconds, can not weld well, should choose other welding process. Such as hot plate welding. Generally speaking, ABS material is the most easily welded, nylon or PP material is the most difficult to weld.