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Bielomatik is launching an external mixing nozzle for its two-channel system to improve the effectiveness in delivery of cutting lubricant to the cutting tip in machining applications.

Bielomatik designs two-channel MQL systems for through spindle applications, which are designed to give greater, more accurate control over the amount of oil released into the air stream.

In a conventional system, lubricant is piped to the Bielomatik rotary transmission unit, whereby the ‘quick valve’ provides the exact dose of oil.

The oil is supplied through a lance, which is located in the centre of the spindle, then into the pipe nozzle in the tool holder.

Compressed air is also fed to the mixing chamber via the rotary transmission through the second channel of the lance.

This process produces a fine air-oil mixture, which is then delivered directly to the cutting tip.

Where external nozzles were perceived as the only option for heavier-duty applications (retrofit to an old machine without through spindle coolant), the single-channel MQL system was adopted.

According to Bielomatik, this only offers a part solution, particularly when undertaking heavy roughing cuts.

In these instances, the system struggles to deliver sufficient lubricant to the cutter tips.

Bielomatik’s external two-channel mixing nozzle takes the place of the rotary coupling and offers an advanced design for MQL delivery systems.

Air is connected into the main through port, which can be from the MQL programmable air supply as in through spindle applications or, for simple single-process applications, air can be supplied directly from the machine air.

With this arrangement, oil is delivered to the mixing nozzle from an in-line high-speed valve, exactly as per the internal system.

Also, the oil is pressurised to 15 bar and injected into the air stream, ensuring that all air flow carries oil to the cutting tip.

The system provides total programmable control of the amount of oil introduced into the air stream, from 5ml/hr up to 400-500ml/hr dependant on oil viscosity.

Bielomatik

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