Longer tool life with cryogenic machining

Metal working traditionally generates high temperatures so that cooling agents have to be applied. High temperatures increase the wear on tools. Fluids with extremely low temperatures are used with cryogenic machining that results in better productivity and quality.

Traditional metal working technologies such as turning, milling and drilling are done with cooling provided by oil, emulsion, compressed air or minimum quantity lubrication (MQL). In addition to removing heat, cooling agents also ensure proper lubrication as well as the removal of metal swarf. The high temperatures that occur when machining result in faster tool wear and/or damage to the workpiece. Temperatures can easily reach hundreds of degrees Celsius. 

Greater cooling capacity

The use of fluids with extremely low temperatures is a recent phenomenon. This is called cryogenic machining - from the Greek ‘kyros’ which means ‘icy cold’.

In practice it involves two different types of cooling agent: CO2 and N2. When using CO2 the temperatures are approximately -80°C, but with nitrogen the temperatures drop as low as approximately -196°C. The cooling capacity of these fluids is much greater than it is with traditional cooling agents.

This technology offers possibilities that are advantageous for productivity and quality, specifically with materials that generate large amounts of heat when milling turning or drilling. Improved tool life of up to 40 per cent and productivity of up to 200 per cent when working with titanium and hardened steel are no exceptions.

The use of these cooling agents has already been proved in industry and is being used in increasing numbers of machines and applications. You can test cryogenic machining for yourself at Sirris in Diepenbeek. Contact us for further information!

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