Water Jet Sweden

Fine Abrasive Waterjet cutting for ultra-high precision

| Editor: Briggette Jaya

Narrow incision using fine abrasive waterjet.
Narrow incision using fine abrasive waterjet. (Source: Water Jet)

Water Jet Sweden offers water-jet cutting systems for ultra-high precision in high-density materials.

Cutting narrow incisions with ultra-high precision in high-density materials using water-jet technology requires a specific water-jet cutting process, which Water Jet Sweden offers with its Fine Abrasive Waterjet process (FAWJ).

Water-jet cutting is a common method for processing parts in high-density materials such as aluminum, stainless steel, titanium and carbon composites. According to the company, the FAWJ cutting process bridges the gap between micro laser and EDM cutting and brings water-jet cutting into the field of micro-part processing. Here, two things are required to enable this high level of precision: A cutting head and cutting process using FAWJ cutting and a machine that achieves extreme accuracy. Water Jet Sweden says its NCM 10 Micro fulfils both requirements.

According to Water Jet Sweden, its first micro water-jet cutting head developed in 2008 was a high-precision cutting tool that produced one of the most precise, abrasive water jets in the world. The unique cutting head enables an abrasive jet diameter down to 0.2 mm. The FAWJ cutting process requires very fine abrasives with a 230-240 mesh and a special CNC-controlled dosage abrasive feeder.

To reach the levels of accuracy required in micro-part manufacturing, the NCM 10 water jet has a number of unique design features that create a rigid table to withstand temperature fluctuations. The mineral-cast Bearlit table frame is a table frame made of a composite material with exceptional stiffness, which withstands vibrations and temperature fluctuations. The frame is integrated in the construction and moving system of the machine as a complete unit. A rubber suspended stainless steel water catcher is a free-standing catcher solution that prevents vibrations and temperature variations from influencing the cutting process. The water catcher is made of stainless steel, making it maintenance-free. A Renishaw Invar Scale in X and Y axes is fitted using a Renishaw Absolute Linear Encoder fitted in both the X and Y axes to allow for micrometer scaling with an extremely low expansion coefficient and ultra-high resolution.

The palettised cutting table makes it easy for the user to install fixtures and presses, depending on the different types of machining required. The maximum table size is 1x1 m, which covers most cutting applications. The cutting table is fixed into the table frame to enable ultra-high precision cutting.

“There are many suppliers who state that they offer micro-cutting machines, but not many can offer a true micro part cutting tool with 0.2 mm incision combined with ± 0.008 accuracy,” says Tony Rydh, co-founder and CTO at Water Jet Sweden.

Additional Information
 
Comparing FAWJ cutting with EDM machining:

Water jet cutting - Function, methods and application examples

Cutting technology

Water jet cutting - Function, methods and application examples

03/06/2019 - In water jet cutting, workpieces are separated from each other by a high-pressure water jet. For this purpose, either specially treated water or an abrasive agent is used. read...

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