Using metal-cutting fluids in an energy-efficient mannerCase Study BOSCH metal cutting
We were able to develop and implement the following economic measures:
Largely abandoning the use of cutting fluid (e.g. minimum quantity lubrication) is unfortunately not a possibility for us due to quality-related issues. However, we achieve good results by optimising spray nozzles for grinding and by reducing the cutting fluid pressure for internally cooled drilling and milling tools.
Shutdown during downtime
Usually, the cutting fluid supply continues during off hours so that the machine can maintain a steady temperature. The machine is therefore extensively flooded with cutting fluid. By optimising the restart process and improving scheduling, we have made temporary shutdowns possible.
When there are large temperature differences between the cutting fluid and its surroundings, the cost of the re-cooling process increases significantly. With oil-based cutting fluids, we can often adjust the temperature to the room or track it.
Larger pumps are especially used in central systems and to internally cooled tools. The pressure is usually kept constant by a lossy bypass regulator. Regulating the pump speed instead provides significant savings.
We recently launched the global rollout of the proposed measures. To this point, we have been able to account for a total savings of 4,000 MWh per year. This is equivalent to the electricity needs of 1,000 single-family houses.
Robert Bosch GmbH
+49 (0) 711 811-30379