How big air compressor is suitable for 15 machining centers

For 15 processing centers, it is recommended to allocate air compressors with a displacement of 6 to 8 cubic meters per minute and a power of 37 to 55 kW, depending on your processing method.

First, let's talk about how it was calculated. The gas consumption of a single processing center is generally between 0.3 and 0.5 cubic meters per minute, depending on what it mainly uses. If you only change the knife, clamping these basic actions, a single about 0.3 cubic meters per minute is enough. If compressed air is used to blow iron filings and cool the cutting point during processing, the single unit may reach 0.5 or even higher.

15 units are calculated at 0.4 cubic meters per minute, and the theoretical total demand is 6 cubic meters per minute. However, it is not 15 units that use gas at full capacity at the same time, so it is necessary to take a simultaneous use coefficient, which is generally 0.7 to 0.8, which is 4.2 to 4.8 cubic meters per minute. Add in about 15% to 20 leaks in the pipeline, and that's 5 to 5.8 cubic meters per minute. Finally, a margin of 10 to 20 percent should be left to cope with the peak and future expansion of production. The final demand is about 6 to 7 cubic meters per minute.

Therefore, the air compressor displacement of 6 to 8 cubic meters per minute is relatively safe. The corresponding power is in the range of about 37 to 55 kW. In terms of working pressure, the processing center generally needs to 0.6 to 0.7 MPa, plus pipeline loss and allowance, it is enough to choose a model with a rated exhaust pressure of 0.7 MPa, and do not choose a higher pressure. For every additional 0.1 MPa, the energy consumption increases by about 7%, wasting electricity.

It is recommended to match 3 to 5 cubic meters of air storage tank to buffer pressure fluctuation and avoid pressure drop when multiple air tanks are used at the same time.

If there is a large number of air blowing and cooling processes in your processing, the air consumption will be obviously too large. It is suggested to directly match the air volume according to 8 cubic meters per minute or even higher. It is better to match the air pressure instead of being too small, so as not to report to the police and stop the machine when working, which will affect the production.