Water knowledge

    Water jet cutting is what?

    Time: 2015-01-27 16:10:00     

    The so-called "water", is the use of high-pressure pump sealed water under pressure through a nozzle, the nozzle senior hard alloy, diamond, sapphire made of very fine, cutting materials. To do this, have relatively high demand for water, pipe, nozzle. Such as pipes, water jet is used in high pressure tools the water pressure after the shoot out, must have a high pressure to the hard cutting material cut, so the pipe must be able to withstand high pressure, the pressure is much greater than 700 MPa, because the thin steel plate (the material to be cut) itself can withstand the pressure of 700 mpa. Secondly, water jet with water no impurity is wrong. Because the pressure is much greater than 700 MPa, then for pipeline sealing device for sealing performance, no matter how good, pure water will make them wear and leakage. In order to solve this problem, the water jet of water soluble emulsified oil to add 5%, improve the sealing effect. For high-pressure pump, also need some oil added to increase its sealing performance. As mentioned above, the water jet nozzle is made of hard alloy, sapphire and other materials, the nozzle diameter is only 0.05 mm, and the hole wall is smooth, can withstand the pressure of 1700 MPa, high pressure water so blown out like a knife cutting materials. Some of the water also adds some long chain polymers, such as polyethylene oxide, increase water "viscosity", make the sprayed water is like a "thread".



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