Reasons and solutions of electrode cutting nozzle wear of CNC plasma cutting machine

The problem of electrode cutting nozzle wear of plasma cutting machines has always been the focus of attention of enterprises, because electrode cutting nozzles are one of the primary consumable costs of CNC plasma cutting machines. Because there are different brands of electrode cutting nozzles on the market, imported The price of the brand electrode cutting nozzle can be more than one hundred yuan, so how to reduce the consumption of CNC plasma cutting machine consumables, its significance also becomes important.

Electrode cutting nozzle

The personnel who operate the CNC plasma cutting machine are aware that if the cutting tip of the CNC plasma cutting machine is damaged, it is easy to cause no arc in the plasma processing process. To prevent this situation, today’s hardware accessories processing factory-Tongyang CNC Technology will explain to you. When using the electrode cutting nozzle of the CNC plasma cutting machine, what should be used to make the electrode cutting nozzle more useful?

In the process of CNC plasma cutting machine, under normal conditions, the service life of a set of electrode cutting nozzles is about 3-4 hours. Many users buy low-cost and poor-quality electrode cutting nozzles in order to reduce the cost of consumables. This practice will only increase the wear of the cutting nozzle, and it is easier to burn the cutting gun, which will bring some uncertain security risks, so it is not recommended to everyone. In order to reduce the loss of the electrode cutting nozzle, Dongguan Hardware Accessories Processing Factory-Tongyang CNC has summarized the following solutions in the on-site after-sales work with customers for a long time:

　　Method one: Eliminate oxides on the air or oxygen nozzles

When air or oxygen plasma is used in 　　, oxides will accumulate in the nozzle, which will affect the air flow and increase the life of the consumable parts. Wipe the decomposable oxide inside the nozzle with a clean flannel.

　　Method two: Check the air flow and cooling flow every day

　　 One of the most rare causes of torch damage is the lack of cooling flow. The demand is often reflected on the torch's airflow and air pressure or coolant. If the airflow is insufficient or leaked, it should be stopped immediately to remove the fault.

　　Method three, use hardened water to inject torch

　　 Hard water will form metal impurities deposited on the nozzle ring, which will affect the airflow activity, reduce the quality of the torch and extend the life of the consumable parts.

　　Method four, ensure the correct pressure and activity of plasma

　　The correct pressure of the plasma and the operating life of the consumable parts are very important. If the air pressure is too high, the life of the electrode will be greatly increased; if the air pressure is too low, the life of the nozzle will be affected.

　　Method 5: Use reasonable cutting distance

　　According to the requirements of the application statement, use a reasonable cutting distance, which is the distance between the cutting nozzle and the surface of the workpiece. When perforating, try to use the twice the normal cutting distance or the maximum height that can be transmitted by the plasma arc.

　　Method 6, Do not overload the nozzle

　　Overloading the nozzle (that is, exceeding the nozzle's mission current) will quickly damage the nozzle. The current intensity should be 95% of the nozzle's mission current. For example: 100A nozzle current intensity should be set to 95A.

　　Method 7, the thickness of the perforation should be within the allowable range of the machine

　　The cutting machine can not perforate the steel plate beyond the task thickness, the usual perforation thickness is 1/2 of the normal cutting thickness.

　　Method eight, insist on the boring and clean plasma gas

　　 Plasma fragmentation requires dry and clean plasma gas to perform normal tasks. Dirty gas is usually the result of gas compression and fragmentation, which will extend the service life of consumable parts and form abnormal damage.

　　Method nine, to prevent the plasma arc elongated and extended

　　 If the plasma arc only touches the surface of the workpiece as long as it is elongated and extended, this stretching and expansion will occur at the beginning and end of the cutting of the plasma arc, which will cause abnormal damage to the nozzle. If you use the right edge termination technique and choose the appropriate "break arc" signal time, this result can be prevented.

　　Method ten, cutting should start from the edge

　　 Try to cut from the edge instead of punching. Using the edge as the starting point will extend the life of the consumable parts. The correct way is to indirectly align the nozzle with the edge of the workpiece and then start the plasma arc.

　　 Therefore, when choosing a CNC plasma cutting machine, pay attention to whether the torch and the electrode cutting nozzle match. In addition, the suitable cutting thickness of nozzles with different apertures is also different. Therefore, before the cutting task of the CNC plasma cutting machine, it is necessary to select an electrode cutting nozzle that matches the cutting capacity and the plate to be cut.