What should be paid attention to in the use principle of laser cutting machine

The cutting quality of a laser cutting machine depends on the combined effect of many factors. In some of the previous technical articles, we have specific instructions on many aspects including equipment operators, control system process design, machine tool use skills, etc. Its purpose is to suggest a relatively complete equipment usage specification and process for more users who are beginning to come into contact with laser cutting machine equipment.

The company is concerned about the efficiency and precision that laser cutting machine equipment can bring, but all of this depends on the details we talked about before. This article will mainly introduce the application specifications of laser cutting machine eddy current ring, although from In terms of equipment composition and importance, the vortex ring is only an accessory composition for the laser cutting machine, and does not even have the same function and significance as the transmission system and cutting system, but we hope that this will allow user companies to establish a similar concept: namely Understanding the role and use of each accessory will determine the effectiveness of the equipment. And this is also a principle that has been implemented in the production, sales and service of laser cutting machines for many years.

1. Introduction of vortex ring for laser cutting machine

With the wide application of laser cutting machines, everyone is more and more concerned about the quality of plasma cutting and how to improve the cutting process! Not all plasma cutting machines are equipped with vortex rings, and there are very few domestic machines.

The function of the vortex ring is mainly to make the high-pressure gas from the air compressor generate a vortex, which is like a rotating drill bit, so that the plasma arc has better penetrating power and produces a better cutting end face, which improves The grade of plasma cutting machine. The imported plasma cutting machine has a good cutting effect, one of the important reasons is because of this technical index!

When purchasing a plasma cutting machine, what kind of configuration can be selected for what kind of requirements, if the requirements are not high, domestically produced is sufficient, the groove is generally between 5-15 degrees, and the imported plasma power supply is relatively small Some, usually around 3-5 degrees, the price difference is several times!

2. The effect of the eddy current ring of the laser cutting machine

When using a laser cutting machine with a non-vortex ring configuration, a very common problem is the slag on the cutting surface, which is the cutting flatness problem we will talk about. As far as laser cutting machines are concerned, since they are mainly used for cutting special materials such as stainless steel, the slag treatment is more difficult than carbon plates. This is for some finishing companies or users who want to reduce secondary processing. How to reduce the residue of molten slag and improve the quality of cutting flatness is believed to be the concern of many companies.

From the literal meaning, the so-called flatness of the cutting surface refers to the distance between the highest point and the lowest point on the cutting surface of the measured part, and the distance between two parallel lines in the direction of the inclination of the cutting surface.

Three, laser cutting machine eddy current ring parameters

1. Cutting current

It is the most important cutting process parameter, which directly determines the thickness and speed of the cutting, that is, the cutting ability. The larger the cutting current, the higher the cutting capacity, the cutting speed, the width of the cutting opening, the faster the damage speed of the cutting nozzle, and the increase in cost. Therefore, the cutting current should be correctly selected according to the thickness of the material before cutting.

2. Cutting speed

The optimal cutting speed range can be selected according to the equipment description or determined by experiments. Due to the thickness of the material, different materials, high or low melting point, thermal conductivity and surface tension after melting, the cutting speed is also corresponding Variety. The speed directly affects the cutting quality, and higher and lower speeds are not good.

3. Arc voltage

It is generally considered that the normal output voltage of the power supply is the cutting voltage. Plasma arc cutting machines usually have higher no-load voltage and working voltage. When the current is constant, the increase of the voltage means the increase of the arc enthalpy and the increase of the cutting ability. If the diameter of the jet is reduced and the flow rate of the gas is increased while the enthalpy value is increased, a faster cutting speed and better cutting quality can often be obtained.

4. Nozzle height

Refers to the distance between the nozzle end face and the cutting surface, which constitutes a part of the entire arc length. Because the laser cutting machine arc cutting generally uses the power supply with constant current or steep drop, after the nozzle height increases, the current change is small, but it will increase the arc length and cause the arc voltage to increase, thereby increasing the arc power; but at the same time The arc length exposed to the environment will increase, and the energy lost by the arc column will increase. In the case of the combined effect of the two factors, the role of the former is often completely offset by the latter, which will reduce the effective cutting energy and reduce the cutting ability.

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