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How does a waterjet work?

2022-12-19
The working principle of the "water knife" is to pressurize the water flow to more than 380MPa. Under the constraint of the nozzle with a small diameter (generally greater than 0.2mm), a high-speed "water arrow" is formed, which can cut through soft materials such as wood, leather, rubber and so on. If the "water arrow" is mixed with abrasive, it can cut through a variety of hard materials, such as rock, glass, steel and so on. Combined with the microcomputer control table or manipulator, the formation of CNC machining system, to meet the special or complex plane processing requirements.

Features:
Can be any material for any curve of one-time cutting processing (in addition to water cutting other cutting methods will be limited by material varieties); The heat generated by cutting will be immediately taken away by the high-speed flow water jet, and does not produce harmful substances, materials have no thermal effect (cold cutting), after cutting do not need or easy secondary processing, safety, environmental protection, fast speed, high efficiency, can achieve arbitrary curve cutting processing, convenient and flexible, wide use. Water cutting is a mature cutting technology with good applicability at present.

Classification:
According to the Gaza situation: water cutting is divided into sand - free cutting and Gaza cutting two ways.

By equipment to divide: divided into large water cutting and small water cutting.

Divided by pressure: divided into high pressure type and low pressure type, generally with 100MPa as the limit. The high pressure type is above 100MPa, and the low pressure type is below 100MPa. And more than 200MPa for ultra-high pressure type.

According to the technical principle, it can be divided into pre - mixing and post - mixing.

By mechanical structure: divided into cantilever type and gantry type.

Safety cutting is divided into safe cutting and non-safe cutting. The difference is mainly in the water pressure. Under 100MPa, low-pressure water cutting can be used in special industries such as: danger, petroleum, coal mine, dangerous material treatment and so on.


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Waterjet common problems - water pressure is too low to eliminate the cause.
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