Overview of vibration system of ultrasonic plastic welding machine

We all know that the principle of ultrasonic plastic welding machine is ultrasonic technology, which makes the workpiece vibrate and achieve the welding effect. There is an ultrasonic vibration welder system in the ultrasonic welding machine, which mainly controls the whole ultrasonic vibration to make the vibration frequency more stable. This system also exists in the ultrasonic metal welding machine, but the vibration system will be different due to different welding workpieces. Next, we discuss the vibration system of the ultrasonic plastic welding machine.

The working principle of ultrasonic vibration system of ultrasonic plastic welding equipment is to convert electric energy into mechanical vibration. It includes ultrasonic transducer, tool head and horn. The vibration of the ultrasonic transducer is produced by the inverse piezoelectric effect of piezoelectric ceramic materials. The piezoelectric crystal is placed at the external electric field. Through the action of the electric field, it can cause the movement of the center of gravity of the positive and negative charges in the crystal. The displacement of this electrode leads to the change of the crystal shape, which is the inverse piezoelectric effect of the ultrasonic welding machine.

During the operation of the ultrasonic vibration system of the ultrasonic plastic welding machine, the vibration amplitude generated by the radiation surface of the transducer is relatively small, and the amplitude required in the welding machine is more than ten times. Therefore, it needs the help of the horn. It is like a magnifying glass, which can amplify the displacement and movement speed of the vibrating particle of the machine, and can gather energy for the ultrasonic ability. The horn of ultrasonic metal welding machine has stronger energy gathering effect and can focus the ability on a small area. The horn can also act as an analytical impedance converter, which can build a bridge between the transducer and the load, so as to match the impedance and make the energy of the ultrasonic plastic welding machine transmit between the transducer and the load more effectively.

By summarizing the vibration system of ultrasonic plastic welding machine, we can know the working principle of ultrasonic vibration system. It mainly controls the ultrasonic ability through the movement of transducer and horn. When the ultrasonic welding machine wants to weld a workpiece, the transducer will produce vibration, and the vibration will be expanded through the horn to meet the vibration amplitude requirements of welding. This system can also make the focus area of ultrasonic energy smaller, especially for ultrasonic metal welding machine. The higher the ultrasonic energy, the higher the welding strength. In the accumulation of people's continuous use experience, the ultrasonic vibration system can be continuously improved to make the ultrasonic plastic welding machine better control the welding range.