16 February 2022

Cutting with compressed air - it pays off!

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Auxiliary gases have the greatest impact on the prices of laser cutting servicesbecause both their price and consumption are quite high. Initially, oxygen was the main and most popular gas, but later nitrogen also gained popularity. An example of an “expensive cut” would be working on stainless steel or non-ferrous metals which require high pressure gases (which means more wear). For many years people were looking for a cheaper alternative, until someone came up with an ingenious solution - compressed air cutting, which consists mostly of oxygen and nitrogen. It is much cheaper to obtain and allows you to reduce cutting costs 6 times , its additional advantage is also higher throughput and faster cutting.

Below is a table created by the Weni Solution Technical Department to illustrate the savings.

 

Cost calculation for 1 hour of operation of a fiber laser with a 3015H PRO 3000W Raycus :
(Cutting parameters for 3 mm thick stainless steel - approximate values)

tabela, porównanie kosztów cięcia powietrzem. To się opłaca, cięcie sprężonym powietrzem

The total cost of air cutting compared to oxygen and nitrogen cutting is several times lower.
Taking into account gas consumption, within an hour it saves approx. 55-100 PLN.

 

What is air cutting?

The basic component of air is nitrogen (approx. 78%), which is used to cut non-ferrous metals, and oxygen (approx. 20%), which is used to cut carbon steel, which creates a fairly universal mixture of gases supporting the cutting process. The oxygen content enables the cutting process to be accelerated by up to 20-30% with appropriate selection of cutting parameters. The higher pressure and high nitrogen content in the mixture effectively remove the molten material from the cutting edge.

What compressor to buy?

First of all, it is efficient, quiet, screw and with a large capacity (min. 500l). We offer just such a model: Weni AC-20HP-500 compressor . An ordinary compressor with a smaller capacity will not work for air cutting, as the air quality and pressure head may not be sufficient to obtain a satisfactory effect, and frequent switching on will be a burden for the operators. The compressed air supplied to the laser cutter must, above all, be dry and very clean.

* Until 04/11/2022, you can get the compressor for free for 3 months for the purchase of a PRO series laser (see promotions).

Does air cutting differ from working with traditional gases (O2, N2)?

The 20% oxygen content in the mixture increases the temperature at the cut edge, which in the case of e.g. stainless steel may cause minimal discoloration near the cut line. In some cases, additional processing of the cut elements is necessary. In addition, the edge of the processed material may be slightly worse, but for most customers this slight difference in quality is not a problem.

Will this solution work in every case?

According to our specialists from the Service Department, the answer is definitely affirmative. In order to give you the opportunity to find out about it, we started a special promotion.
When you decide to buy fiber equipment from the offer, you get an efficient 500l compressor for free (for 3 months), which allows you to fully test both the air cutting method and the compressor itself.
More information on the promotional campaign can be found in the News.

In conclusion, is it profitable to cut with air?

Despite a slight difference in the quality of the cut line, which can be refined and made higher , the air cutting method is highly cost-effective.
Costs of 1 hour of fiber laser operation using compressed air are 80% lower than with nitrogen. The reimbursement of the costs of the purchase of a suitable compressor should be returned after approximately 1 year.

Would you like to know more about air cutting or promotion method?

Contact us:
a) By e-mail: [email protected]
b) By phone: 77 433 71 30 (Mon-Fri 8-16: 00)
c) Through the form available on our website

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