Ultrasonic cutting knife

1. Overview
'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 blade is vibrating ultrasonically, the friction resistance is extremely small, and the material to be cut is not easy to stick to the blade. This is especially effective for cutting sticky and elastic materials, frozen materials such as food, rubber, etc., or objects that are inconvenient to apply pressure.
< Another great advantage of ultrasonic cutting is that it has a fusion effect at the cutting site while cutting. The cutting area is perfectly edge-sealed to prevent the cut material from loosening.
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The uses of ultrasonic cutting machines can also be expanded, such as digging holes, shoveling, scraping paint, engraving, slitting, etc.
< 2. Basic structure and characteristics
< Ultrasonic cutting machine is a type of equipment that uses wave energy for cutting processing. Its biggest feature is that it does not use an edge for cutting. 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.
< Similar to conventional cutting, the basic components required are a cutter and a chopping board. Ultrasonic cutting machines also have two basic structures. According to the location where ultrasonic waves are applied, we might as well divide it into ultrasonic knife-type cutting machines and ultrasonic chopping board-type cutting machines.
< The ultrasonic cutter type cutting machine directly loads ultrasonic energy onto the cutter, and the cutter becomes a cutter with ultrasonic waves. When cutting materials, the materials are mainly softened and melted by ultrasonic energy. The cutting edge of the cutter only plays the role of slit positioning, ultrasonic energy output, and material separation. This cutting method is suitable for cutting thick, thick, long and other materials that are inconvenient to set up a chopping board. Such as rubber mixing machine output raw rubber slitting, pipe cutting, frozen meat, candy, chocolate cutting, printed circuit boards, or hand-held cutting machines, etc.
< The basic structure of the ultrasonic cutting board cutting machine is similar to the ultrasonic knife cutting machine, except that the ultrasonic output part is not a cutting knife, but a standard ultrasonic plane mold. Here, the mold acts like a cutting board. However, this is a chopping board that is vibrating ultrasonically. The traditional cutting knife can be used in any shape, but the sharpness requirement of the cutting edge is reduced, and the life of the cutting knife is also greatly extended.
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In many cases, due to the effect of ultrasonic waves, traditional cutting blades also allow for great changes. The most typical one is that the cutting knife is transformed into a cylindrical wheel with a raised pattern, commonly known as a flower wheel. The raised part is equivalent to the cutting edge of the cutter, and the material to be cut passes between the flower wheel and the ultrasonic cutting board. This combination can cut endless patterns with low cost and high efficiency. This cutting method is suitable for cutting sheet-like materials, such as various trademarks, clothing lace, fabric cutting, decorative beads cutting, natural fiber, synthetic fiber, non-woven fabric, artificial resin, paper, film cutting, slitting, etc. Hand-held cutting/>
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