' The principle of ultrasonic cutting machine is completely different from cutting in the traditional sense. It uses ultrasonic energy to locally heat and melt the material to be cut, thereby achieving the purpose of cutting the material. Therefore, ultrasonic cutting does not require a sharp edge or a lot of pressure, and will not cause chipping or damage to the material being cut. At the same time, because the cutting knife is vibrating ultrasonically, the frictional resistance is particularly small.
' Another great advantage of ultrasonic cutting is that it has a fusion effect on the cutting part while cutting. The cutting area is perfectly edge-sealed to prevent the cut material from loosening.
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' 2. Basic structure and characteristics
Ultrasonic cutting machine is a type of equipment that uses wave energy for cutting and processing. Its biggest feature is Cutting without cutting edge. In other words, there is no need for a cutting edge in the traditional sense. Traditional cutting uses a knife with a sharp edge to press against the material being cut. This pressure is concentrated at the cutting edge, and the pressure is very large, exceeding the shear strength of the material being cut. The molecular bonds of the material are pulled apart, and it is cut. Since the material is pulled apart by strong pressure, the cutting edge of the cutting tool should be very sharp, and the material itself has to withstand relatively large pressure. The cutting effect is not good on soft and elastic materials, and it is more difficult on sticky materials.
The basic components of an ultrasonic cutting machine are an ultrasonic transducer, a horn, a cutting knife (tool head), and a driving power supply. The ultrasonic driving power supply converts the mains power into high-frequency and high-voltage AC current and transmits it to the ultrasonic transducer. Ultrasonic transducer is actually equivalent to an energy conversion device, which can convert input electrical energy into mechanical energy, namely ultrasonic waves. Its manifestation is that the transducer moves back and forth in the longitudinal direction. The frequency of telescopic movement is equal to the frequency of high-frequency AC current supplied by the driving power supply. The function of the horn is to fix the entire ultrasonic vibration system, and to amplify the output amplitude of the transducer. On the one hand, the cutting knife (tool head) further amplifies the amplitude and focuses the ultrasonic waves. On the other hand, it outputs ultrasonic waves, using the similar cutting edge of the cutting knife to concentrate the ultrasonic energy into the cutting part of the material being cut. Under the action of huge ultrasonic energy, this part instantly softens and melts, and its strength is greatly reduced. At this time, as long as a small cutting force is applied, the purpose of cutting the material can be achieved.
' This cutting method is suitable for cutting sheet-like materials, such as various trademarks, clothing lace, cloth cutting, decorative beads cutting, natural fiber, synthetic fiber, non-woven fabric, artificial resin, paper, film cutting, Sectioning and so on.
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