Principles of water jet cutting

There are two types of water jet cutting processes; pure water cutting, in which the cutting is performed using only an ultra-high pressure jet of clean water, and abrasive water jet cutting in which an abrasive (typically garnet) is introduced into the high pressure stream.

Pure water cutting can be employed to profile a huge variety of materials, these will typically be 'soft' materials such as gaskets, rubber, foam & plastics. Filtered tap water is fed into an intensifier pump where it is pressurised to (typically) 60,000psi. This ultra-high pressure water is forced through a tiny (0.15mm) orifice jewel which is normally manufactured from sapphire. This has the effect of focusing the beam of water into a fine, accurate stream travelling at speeds of up to 900m/sec, capable of accurate cutting of a wide range of soft materials.

water jet cuttingIn order to cut 'harder' materials or any material containing glass or metal, then abrasive water jet cutting would be employed. The principles of abrasive water jet cutting are similar to pure water jet cutting, but once the stream has passed through the orifice it enters a carbide nozzle. Within this nozzle is a mixing chamber within which a partial vacuum is created as the water passes through. Garnet is introduced under gravity into the nozzle and the partial vacuum within the mixing chamber has the effect of dragging the abrasive into the water stream to create a highly abrasive cutting jet. Abrasive cutting would typically be used on materials such as stainless steel, aluminium, stone, ceramics & composite materials.

waterjet cutting In both processes the head is controlled by a CNC controller, this offering great accuracy and repeatability. The CNC controller is programmed by first drawing the part to be manufactured using proprietary software, and then converting this drawing into a G code format – CNC language.

If you need some advice or would like a quotation, email us at sales@onestopsealing.co.uk or call 01482 610990 and we’ll work with you to see your project through.

  • History

    The first industrial use of water jets can be traced back over 100 years when they were originally developed for use in the mining of gravel and clay deposits to blast material from the quarry face...

    Water jet machine high pressure pump top works
    History
  • Advantages of water jet cutting

    Water jet machines are without a doubt, the most versatile profiling tools on the market today. One of their key advantages lies in their ability to cut virtually any materials...

    Close up of water jet nozzles and sapphires
    Advantages
  • Capabilities

    One Stop Sealing Ltd provides a sub-contract profiling service to a wide range of industrial sectors, including precision engineering, specialised OEMs, general fabrication, repair and maintenance contractors...

    Water jet machine abrasive cutting head
    Capabilities
  • Upload your CAD drawings

    We are happy to receive your drawings in any one of a number of electronic formats, including dxf, dwg and CAD. Alternatively we can produce drawings inhouse.

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    Upload CAD Drawings

One Stop Sealing has vast experience providing sealing solutions to the chemical manufacturing industry.

We'll work with you to see your project through.

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