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Introduction of several common cutting machines


Water jet cutting machine (water cutting machine)
The water cutter is also known as the "water knife". As the name implies, it is cut by means of a high-pressure water jet and adding abrasive (corundum or garnet). Among the many cutting methods, only water cutting is a cold cutting, and the kinetic energy of the abrasive water jet is directly used to cut the metal to achieve the cutting purpose. There is no chemical change during the cutting process, and there is no influence on the physical and chemical properties of the cutting material, no heat. It has the advantages of deformation, narrow slit, high precision, smooth cut surface, clean and pollution-free, and can process materials that cannot be processed or processed by traditional processing and other processing methods, such as glass, ceramics, composite materials, reflective materials, chemical fiber, heat sensitive materials. Wait. The range of cutting materials is the widest, almost no cut, and the thickness of the cut is generally less than 20mm.
The water cutting machine has more consumables and higher cost of use, because all the abrasives are disposable, and once they are used, they are discharged into nature, and the environmental pollution is also serious. The smoothness of the cutting edge is rougher than that of a laser with a protective gas, and most of the time requires secondary processing.
Flame cutting machine
Flame cutting is the oldest method of hot cutting, cutting metal thickness from 1 mm to 1.2 m, but when you need to cut most of the low carbon steel plate thickness below 20 mm, other cutting methods should be used. Flame cutting uses high temperatures generated during the combustion of iron oxide to cut carbon steel. The flame torch is designed to provide sufficient oxygen to burn iron oxide to ensure good cutting results. Flame cutting equipment is low cost and is the only cost-effective means of cutting thick metal sheets, but has its drawbacks in thin sheet cutting.
Compared with plasma, the heat-affected zone of flame cutting is much larger and the thermal deformation is larger. In order to cut accurately and effectively, the operator needs to have superb technology to avoid the thermal deformation of the metal plate in the cutting process. Ordinary cutting torch 6~180mm (up to 250mm), special cutting torch is also generally not more than 300mm, of course, can also be customized to a larger, but generally not used by manufacturers. The equipment has the lowest investment cost and low cost of use, but the range of materials to be cut is small.
Fiber laser cutting machine
Since the fiber laser cutting machine can transmit through optical fiber, the degree of flexibility is unprecedentedly improved, the number of fault points is small, the maintenance is convenient, and the speed is fast. Therefore, the fiber cutting machine has a great advantage when cutting a thin plate within 4 mm, but is affected by the wavelength of the solid laser. It is of poor quality when cutting thick plates. The fiber laser cutting machine has a wavelength of 1.06 um and is not easily absorbed by non-metals, so it cannot cut non-metallic materials. The photoelectric conversion rate of fiber laser is as high as 25% or more. The advantages of fiber laser in terms of electricity consumption and supporting cooling system are quite obvious. According to international safety standards, the laser hazard level is divided into 4 levels. Due to the short wavelength of the fiber laser, the human eye is the most harmful to the eye because of the short wavelength. For safety reasons, fiber laser processing requires a completely enclosed environment.
Main advantages: high photoelectric conversion rate, low power consumption, can cut stainless steel plate within 12MM, carbon steel plate, is the fastest laser cutting machine for cutting thin plates in these three machines, small slits, good spot quality, can be used for fine Cutting.
Main disadvantages and shortcomings: At present, most of the core technologies of fiber lasers are in the hands of one or two manufacturers in Europe and the United States, so most of the machines are expensive. Most of the machines cost more than 1.5 million, and the low-power is basically About 500,000 yuan, because the fiber kerf is very thin and consumes a lot of gas during cutting (especially during nitrogen cutting), and the fiber laser cutting machine is difficult or even impossible to cut aluminum plates, copper plates and other high reflective materials, and the speed when cutting thick plates very slow.
Main Market Positioning: Cutting below 12mm, especially for high-precision machining of thin plates, mainly for manufacturers with high precision and efficiency. It is estimated that with the appearance of lasers of 5000W and above, fiber laser cutting machines will eventually replace CO2 high-power lasers. Most markets for cutting machines.
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