According to the requirements of the instructions, reasonable tangent distance should be adopted to cut off the distance from the cutting nozzle and the workpiece surface. When perforating, the normal cutting distance should be twice as long as possible, or plasma arc can be used to reach a high height. The correct pressure and flow rate of plasma in NC cutting are very important for the service life of consumables. If the pressure is too high. If the pressure is too low, the life of the nozzle will be affected. Recommended reading: What should we pay attention to when using the numerical control flame cutting machine
Cutting machine can't punch holes on the steel plate which exceeds the working thickness. The normal punching thickness is 1/2 of the normal cutting thickness. In order to make the nozzle overload (i.e. exceed the working current of the nozzle), the nozzle will soon be damaged. The current intensity is suitable for 95% of the working current of the nozzle. For example, 150A circuit should be set for the current intensity of 100A nozzle.
The plasma system needs dry and clean plasma to work properly. CNC cutting dirty contamination is usually a problem of gas compression system. It will shorten the service life of vulnerable parts and cause abnormal damage. The test method of gas quality is that the cutting torch is in state, the mirror is placed at the bottom of the torch, and the gas in the cutting torch is consumed if it appears in the mirror. Water and fog on it, you need to find out the reason and the right one.
Starting from the edge, extend the service life of consumer goods. The correct way is to direct the nozzle to the edge of the workpiece, and then start the plasma arc. At the beginning of the arc, the nozzle and the electrode consume very fast. Before the beginning, the torch should be placed at the distance of the cutting metal.
Blowout-proof chemical coating helps to reduce slag deposit on the protective shell. However, the protective shell must be removed before the torch is sprayed with digital control. If the plasma arc only extends to the surface of the workpiece, the plasma arc will stretch and extend at the beginning and end of the cutting, which will cause abnormal damage to the nozzle. The correct side-start technique is adopted. The problem can be avoided by choosing the appropriate arc signal time.