Under normal circumstances, when laser, plasma, flame, wire cutting, sawing, milling and other processing methods can basically meet the processing requirements, it is not suitable to use water cutting. After all, the water cutting operation cost is high, nozzles, diversion sleeves, High-pressure seals are imported consumables and are more expensive. Ultra-high pressure water cutting Ultra-high pressure water cutting, also known as water jet and water jet, is a high-energy (380 MPa) water flow generated by ordinary water after multi-stage supercharging, and then passed through a very fine ruby ​​nozzle (Φ0.1 -0.35mm), jet cutting at a speed of nearly kilometers per second, this cutting method is called ultra high pressure water cutting.
The CNC water jet cutting machine consists of five parts: ultra high pressure generator, CNC machine tool, fully automatic abrasive conveying system, numerical control system and integral cutting head. The water jet cutting machine is a multi-purpose, high-performance cutting machine. Its biggest feature is the non-heat source high-energy jet processing. There is no heat process in the cutting process, so it can cut all metal and non-metal materials, especially various hot cutting. Methods Materials that are difficult or impossible to process. It has the characteristics of fast incision, flat cutting, no dust, no heat deformation, no pollution, and reduced material waste. Can be cut: titanium alloy, copper plate, steel plate, aluminum plate, cast iron, granite, marble, ceramic tile, chemical fiber, wood, cloth, paper, leather, plastic and other materials. Has been applied to aviation, military, stone, construction, decoration and other finishing enterprises.
1. The ultra-high pressure generator is the power core of ultra-high pressure water jet cutting. It is the heart of the whole machine. It pressurizes the finely filtered water to 300Mpa-400Mpa (45000psi-60000psi), and then forms a kind through the gem nozzle. A jet of about three times the speed of sound, transforming its pressure into concentrated kinetic energy, so as to achieve the purpose of cutting any material.
Second, the CNC machine tool uses a cantilever structure. The X and Y two-axis screw rods are directly connected to the motor through the elastic coupling, which absorbs vibration and has higher transmission precision.
â—† The workpiece can be loaded and unloaded in three directions. Overcoming the shortcomings of gantry machines that can only be loaded from both ends and the size of the blank material is limited. The cantilever machine can place blanks larger than the size of the cutting platform. During the operation, there will be no phenomenon that the screw feeding on both sides of the gantry machine is not synchronized and the timing belt is damaged due to uneven pressure and the cutting accuracy cannot be guaranteed.
â—† Adopting high-quality servo drive system, the screw guide is made of international famous brand to ensure the smooth transmission of the whole machine.
â—† Use high quality dust cover. The dust cover used by our company has more than three times the service life of the universal dust cover.
â—† Separate design from bed and cutting platform. It is not affected by vibration when cutting, improving cutting precision.
3. The fully automatic abrasive conveying system can prompt the operator to add sand to the sand bucket;
â—† Large-volume sand bucket can provide the amount of sand required for continuous 500-800 minutes of cutting without frequent sanding;
â—† Simple and convenient operation, reliable operation and maintenance-free;
Fourth, the use of unique process design, free of adjustment, to ensure that the gem nozzle and the sand tube are absolutely concentric, high cutting efficiency
Fifth, the CNC system;
1. Compatible with many international graphic design software formats, such as ASC, IGS, DXF, DWG, STL, NFL, PRT, STEP, etc. 2. With automatic tool radius compensation, automatic feed line, automatic calculation of cutting line length And processing time automatic nesting (that is, given the blank size and the number of parts to be processed, the software will automatically arrange the best layout position map, eliminating the need for many software without sub-functions and bringing a lot of time for manual typesetting and Necessary material waste) and other functions; (automatic layout interface)
3. With DNC function, it overcomes the shortcomings of the CNC system memory is too small to store large-capacity NC programs, greatly improving production efficiency. Waterjet/water cutting utilizes a powerful pressure, so the waterjet has a small caliber to create a strong pressure.
The water knife, that is, the ultra-high pressure water jet cutting technology has not been developed for a long time, but its excellent cutting ability, fast cutting speed, safe cutting method and low cutting cost make the water cutting technology widely used.
The water jet is used to pressurize water to 300 MPa (300 MPa) or more through an ultra-high pressure generator. It is ejected through a special cutting nozzle in a very small hole. The speed is several times the speed of sound. Extremely strong cutting ability, and by adding abrasives such as sand to it, the cutting ability can be enhanced several times.
High-pressure waterjet can quickly cut almost all materials: glass, rubber, fiber, fabric, steel, stone, plastic, titanium, chrome and other non-ferrous metals, composite materials, stainless steel "target=_blank> stainless steel, reinforced concrete, colloid, Soil. It can be said that there is no such thing as high-pressure water jet cutting machine other than diamond and tempered glass (fragile), and it can safely cut inflammable and explosive materials, such as the demolition type used for discarded artillery shells and bombs. Cutting. The water-cutting incision is fine (about 1-2MM), the cutting precision is high (two thousandths of millimeters and 0.0002mm), and the cuts can be cut freely. The complex cuts are smooth, no burrs, no heat, no annealing. Flat cutting surface, widely used in aircraft parts, precision mechanical gears, printers, Walkman gears, parts and so on.
Alto Fushui's water-jet technology has been in the water-jet cutting industry for many years. It has strong technical strength and rich experience in design and implementation. It can assist manufacturers and organizations to design and manufacture excellent cutting machinery and cutting solutions, large-scale cutting machinery cutting platforms.
Waterjet: The so-called "waterjet" is a high-pressure pump that pressurizes the sealed water and ejects it through a very fine nozzle made of high-grade cemented carbide, sapphire, diamond, etc., and cuts the material.
To do this, there is a relatively high demand for water, pipes, and spouts. For example, pipes and water knives are pressed by high-pressure tools to pressurize water. They must have extremely high pressure to cut hard cutting materials, so the pipes must be able to withstand extremely high pressures. This pressure is much greater than 700 megabytes. Pa, because the thin steel plate (the material being cut) can withstand the pressure of 700 MPa.
Secondly, it is not right that the water used in the waterjet is completely free of impurities. Because the water pressure is much greater than 700 MPa, for sealing equipment such as pipes, pure water will always wear and leak, no matter how good the sealing performance. In order to solve this problem, the water knife water should be added with 5% soluble emulsified oil to improve the sealing effect. For high pressure pumps, some oil is also added to improve the sealing performance.
As mentioned above, the nozzle of the waterjet is made of cemented carbide, sapphire, etc. The diameter of the nozzle is only 0.05 mm, and the inner wall of the hole is smooth and flat, and can withstand a pressure of 1700 MPa, so the high-pressure water sprayed can be like Cut the material like a knife. Some waters also incorporate long-chain polymers, such as polyethylene oxide, which increase the "viscosity" of the water, making the water ejected like a "thin line."
Use and limitations of ultra high pressure water cutting
Although ultra-high pressure water cutting can cut any material, it still has some emphasis on application.
There are three main uses for water cutting. One is to cut non-combustible materials, such as marble, tile, glass, cement products, etc., which are materials that cannot be processed by thermal cutting. The second is to cut flammable materials, such as steel plates and plastics. Fabrics, polyurethane, wood, leather, rubber, etc., can be processed by conventional hot cutting, but it is easy to produce burning zone and burrs, but the water cutting process does not produce burning zone and burrs, and the physical and mechanical properties of the material to be cut are not Changes occur, which is also a major advantage of water cutting; the third is the cutting of flammable and explosive materials, such as ammunition and cutting in flammable and explosive environments, which cannot be replaced by other processing methods.
Under normal circumstances, when laser, plasma, flame, wire cutting, sawing, milling and other processing methods can basically meet the processing requirements, it is not suitable to use water cutting. After all, the water cutting operation cost is high, nozzles, diversion sleeves, High-pressure seals are imported consumables and are more expensive. But when you feel that the thickness of the laser and plasma can be cut too thin, the resulting burrs are too large, and the heat affected zone is unfavorable, you can consider using water cutting; when you feel the burr of the flame cutting is too large, the roughness If the heat affected zone is too large, you can consider using water cutting; when you feel that the wire cutting speed is too slow and you can't cut non-conductive materials, you can consider water cutting; when you feel the milling method is produced When a lot of waste is causing a lot of waste, you can also consider using water cutting, because water cutting does not produce waste, but whole piece cutting, water cutting and cutting materials are mostly available; when you If you feel that using a circular saw and a band saw is too slow, and you can't make a non-linear cut, you can still consider water cutting. When you cut flammable or explosive materials or cut in a flammable and explosive environment, you must consider Use water cutting; when you cut, you don't want to produce poisonous auxiliary gas, no need for secondary processing, do not want to produce thermal effect or deformation or micro crack, and want to produce good trimming quality and can cut at the same time When the tiny hole, you should consider using more water cutting. In short, water cutting is a versatile cutting method, but the use is not optimal in some cases, so make a specific analysis when choosing.
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