Mining with water knife

1. Thin ones can be cut. Don't think about thick stone. The water knife cuts thin but not thick.

2. Compared with laser cutting, the investment of laser cutting equipment is relatively large. At present, it is mostly used for cutting steel sheet and some non-metallic materials, with fast cutting speed and high precision. However, when laser cutting, it will cause arc mark and thermal effect at the cutting seam; In addition, for some materials, laser cutting is not ideal, such as aluminum, copper and other non-ferrous metals, alloys, especially for the cutting of thicker metal plate, the cutting surface is not ideal, or even unable to cut. At present, the research of high-power laser generator is trying to solve the cutting of thick steel plate, but the cost of equipment investment, maintenance and operation consumption is also considerable. Water cutting has the advantages of small investment, low operation cost, wide range of cutting materials, high efficiency and convenient operation and maintenance

compared with plasma cutting, plasma cutting has obvious thermal effect and low precision, so it is not easy to carry out secondary processing on the cutting surface. Water cutting belongs to cold cutting, no thermal deformation, good cutting surface quality, no secondary processing, if necessary, it is easy to carry out secondary processing

comparing water cutting with wire cutting
for metal processing, wire cutting has higher accuracy, but the speed is very slow. Sometimes it needs other methods to perforate and thread to cut, and the cutting size is greatly limited. Water cutting can drill holes and cut any material, with fast cutting speed and flexible processing size< Compared with other cutting methods, water cutting has high efficiency and high speed, but it needs special mould and cutter. Compared with this cutting method, water cutting is more flexible and can be used to cut workpieces of any shape at any time, especially when the material is thick and hard, The water cutting method is ideal; Flame cutting is also a common cutting process in the metal field. The thickness range of cutting is very large, but compared with water cutting, it has obvious thermal effect, poor cutting surface quality and accuracy. In addition, water cutting can solve the cutting of some special materials such as high melting point, alloy, composite materials and so on
in glass, stone, ceramics and other cutting and processing instries, the traditional method is to use diamond tools for cutting, sawing, milling, etc., the cutting thickness range is very large and the cutting speed is fast, but for the conventional thickness of the plate, water cutting can carry out high-precision arbitrary curve cutting processing, high yield, rece proction costs, and greatly improve the added value of processed procts.

3.

Water jet cutting technology, which takes water as a knife, is originally called high-pressure water jet cutting technology. This technology originated in the United States. Used in aerospace military instry. Because the cold cutting will not change the physical and chemical properties of materials, it is popular

The pure water knife is an early water cutting method. A commercial application began in the mid-1970s for cutting corrugated board. The main application of pure water jet is cutting disposable diapers, tissue paper and car interior parts. For cotton paper and disposable diapers, compared with other technologies, the water jet technology leaves less water on the material

in some diaper or tissue factories, unexpected downtime is common for other cutting technologies and costs more than $20000 per hour. The water jet provides continuous operation and maintenance throughout the year for this application, which can be incorporated into the proction process

extended data:

the portable water cutting technology adopts the way of water and abrasive pressure at the same time, and the pressurized water and abrasive are ejected at the cutting gun nozzle at the same time, which overcomes the problems of energy consumption of siphon effect of large water knife and low utilization rate of water pressure, and effectively completes the cutting operation with low pressure, The working pressure of ordinary water jet is 220-600mpa, and that of portable water jet is 30-50mpa

After a large number of experiments, it is found that when the water pressure exceeds a certain threshold, even pure water will detonate some sensitive chemicals, and the potential energy and impact force of sand will collide with objects e to the presence of abrasive sand in the water

The energy proced by

can also cause the instability of special chemicals. After a lot of experiments and demonstration, the threshold value is about 237.6mp. Therefore, in the water cutting instry, the water cutting above 200mp is mainly used in the machining instry

4. Abrasive must be added to water to cut. Such as garnet, corunm, silicon carbide and so on.

5. Water jet can be widely used in cutting metal, ceramic, stone, glass, cement, paper, rubber, plastic, cloth, polyurethane, wood, leather, ammunition and other materials< The higher the pressure, the better the cutting technology and the faster the cutting speed. The maximum cutting thickness of steel plate is 100 MM-200 mm, and the cutting speed is about 5 mm-15 mm / min; The maximum cutting thickness of stone is 80mm, and the cutting speed is 20-50mm / min. The cutting speed is related to the thickness, material, roughness and abrasive; The cutting roughness is also related to the material to be cut, cutting speed and abrasive selection< It is obvious that ultra-high pressure water cutting has many advantages, but it also puts forward higher requirements from the technical point of view, such as the wear resistance of materials, the sealing problem of ultra-high pressure, the safety problem of ultra-high pressure, the reliability of ultra-high pressure, etc< There are three main uses of water cutting: < br > one is to cut combustible materials, such as steel plate, plastic, cloth, polyurethane, wood, leather, rubber, etc. these materials can also be processed by thermal cutting in the past, but they are easy to proce combustion zone and burr, but water cutting will not proce combustion zone and burr, and the physical and mechanical properties of the cut materials will not change, This is a great advantage of water cutting< The second is cutting non combustible materials, such as marble, tile, glass, cement procts, which can not be processed by thermal cutting< The third is cutting inflammable and explosive materials, such as ammunition and cutting in inflammable and explosive environment, which can not be replaced by other processing methods.

6. Introction
in order to rece the cost better, engineers and manufacturers have been constantly exploring. Now the water jet can effectively rece the cost and create greater profits. Therefore, it is necessary to learn more application technology of water jet in order to create more profits with the lowest cutting cost

in terms of cutting cost, water knife processing instry is considered to be the most versatile and fastest growing instry. In addition to the above, water cutting machine is currently one of the highest proction capacity machines in the world, which is superior to other processing technologies, such as flame cutting, plasma processing, laser processing, EDM, turning and milling, etc. At the same time, water cutting will not proce harmful gas or liquid, will not generate heat on the surface of the workpiece, it is truly multifunctional, efficient, cold cutting

water jet cutting shows that it can do some processing that can not be completed by other simple processes. It can drill holes in titanium and cut various patterns on stone or glass, which shows the uniqueness of water jet. It does not proce heat when cutting materials. In this cold processing process, the supersonic water arrow proced by it can achieve the ideal effect when cutting the surface of materials. The mixing of water and sand enhances its cutting ability
how high pressure water is proced
the basic principle is simple and complex. The water jet starts from the pressure pump, passes through the high-pressure pipe, and then shoots out from the cutting nozzle. A very simple explanation. However, it is a very complex design to proce 60000 psi pressure. In the design process, there is a small leakage will cause damage to the components. Therefore, manufacturers and engineers will carefully handle the processing technology of high-pressure materials, and use special technology to combine the machine. Users only need to know the basic operation knowledge
cutting machine was used in instry in 1982, and the earliest appeared in 1970. In instry, it is mainly used in automobile, aviation and glass instry, from which the accuracy is constantly improved. The pressure of abrasive cutting machine can reach 55000 psi. The high-pressure water is injected through a small nozzle at a speed of 762m / s, which is 2.5 times of the speed of sound
the pomegranate sand is mixed into the high-speed water jet, mixed in the mixing tube, and then directly ejected from the sand tube to the processed material at the speed of 305m / s. This cutting process is actually a grinding cutting process, and this force and action are generated by aquatic procts
1. It can cut a wide range of materials, such as metal, marble, glass and so on

2. Good cutting quality
smooth incision, no rough, burr edge
3. No heat processing
because it uses water and abrasive cutting, it will not proce heat (or proce little heat) in the process of processing, and this effect is very ideal for the material affected by heat. For example: titanium
4. Environmental protection
this kind of machine adopts water and sand cutting, which will not proce toxic gas in the process of processing, and can be directly discharged, which is more environmental friendly
5. There is no need to change the cutting tool
you do not need to change the cutting machine device, a nozzle can process different types of materials and shapes, saving cost and time< The program is mainly generated by CAD drawing software. You can design line drawings in layout or input DXF files generated from other software. In addition, the machine supports third-party software, Such as nesting typesetting software (used to fill the graphics in the workpiece, can minimize the loss of the workpiece)
8, fast programming
can transfer the programs generated by other software into the machine, it can establish the tool path from CAD, and can calculate the accurate positioning and cutting speed of the cutter head at more than 2000 points / inch (800 points / cm), All you need to do is to specify the material and thickness you want to cut, and other work is left to the machine.
9. Combined with other equipment, you can operate separately.
the water cutting machine can be combined with other processing equipment (such as drilling head) to make full use of its performance and optimize the utilization of materials.
10 Rece the number of adjustment
the workpiece can be fixed with a small side pressure, recing the trouble caused by complex clamping

7. It's usually about 20-30 hours. If you are demanding, you can still use it!

8. The so-called "water knife" is to use a high-pressure pump to pressurize the sealed water and spray it out through a nozzle made of high-grade cemented carbide, sapphire, diamond, etc
to achieve this, there is a high demand for water, pipes and nozzles. For example, the water jet is used to pump water with high-pressure tools. It must have a very high pressure to cut the hard cutting material. Therefore, the pipe must be able to bear a very high pressure, which is far greater than 700 MPa, because the thin steel plate (the material to be cut) itself can bear a pressure of 700 MPa
secondly, it is wrong that the water used for the water knife is completely free of impurities. Because the water pressure is much higher than 700 MPa, no matter how good the sealing performance is, pure water will always make them wear and leak. In order to solve this problem, 5% soluble emulsified oil should be added to the water for water jet to improve the sealing effect. For high-pressure pump, some oil should be added to improve its sealing performance
as mentioned above, the nozzle of the water jet is made of cemented carbide, sapphire and other materials. The diameter of the nozzle is only 0.05mm, and the inner wall of the hole is smooth and flat, which can withstand the pressure of 1700mpa, so the high-pressure water can cut materials like a knife. Some water also added some long-chain polymers, such as polyethylene oxide, to increase the "viscosity" of water, so that the ejected water is like a "thin line".