Nitrogen to the requirement of gas parameters in the cutting

Focused on cutting is the use of the high power density beam artifacts, cause the burning place material rapidly melting, gasification, ablation, or reach the ignition point, at the same time borrowing and beam coaxial high-speed airflow auxiliary gas blowoff molten material, so as to realize a thermal cutting method for cutting work pieces.





pressure and nozzle decided to cut off the surface roughness and burr. Appropriately increased pressure to discharge in the cutting, but too much will increase the surface roughness value. Nitrogen in cutting cutting parameters for gas has the following requirements:

( 1) Air pressure

nitrogen is not involved in the combustion, is used to blow off relatively low temperature of liquid material, need ( 10 to 14) * 105 pa high pressure. And the pressure of oxygen cutting is generally not more than 4 * 105 pa.

( 2) Nozzle

use high pressure nitrogen, requires a larger nozzle diameter in order to keep the air output. Such as stainless steel with 2 mm thick, oxygen using nozzle HK10 ( ø10mm) , nitrogen required HK15 ( ø15mm) 。

( 3) Purity

nitrogen purity has a great influence on the cutting quality, contain oxygen cutting quality. While water will do harm to implement, so the gas level shall ensure that at least in 4. Level 5.