Plazmorez: the nuances of selection + 5 best models

Plazmorez not often needed in the economy, but the people who are constantly working with the metal, it is necessary. This device allows a much faster and easier to perform metal cutting than with the use of grinders. Therefore, in this article I want to share with you some of the nuances that need to know when choosing a device for plasma cutting.

The device allows you to quickly and easily cut the metal workpiece of thick

What is an apparatus

vehicle device

Plazmorez rather complicated apparatus consisting of several basic components:

elements plazmoreza

Next, consider a device plazmoreza detail.

The plasma torch

This element is a plasma torch, in fact, the main element of the apparatus that forms the plasma. The plasma torch is connected to the other elements of the apparatus via a cable and a hose, through which air is supplied and an electric current.

I must say that the cutters are of two types:

• Direct action. The arc discharge occurs between the metal workpiece and cutter. It is these plasma torches are used to work with metal;

Driving devices of direct action of the plasma torch

• Indirect. The arc discharge occurs inside the plasma torch. This allows you to use the machine for cutting non-metallic materials.
  The plasma torch comprises two basic elements:
• Nozzle. This part forms the plasma jet. From its diameter and length depends on the speed metal cutting, cutting size, and intensity of cooling.
  Typically, the nozzle diameter not greater than 3 millimeters, and a length of 9-12 mm. The longer, the better the cut, but less durability of the nozzle. Therefore, the best option when the length of the nozzle and a half times greater than its width;

Scheme nozzle device and electrode

• Electrode. Metal rod, usually made of hafnium. The electrode provides an electrical arc for excitation vozdushnoplazmennoy cutting.

Source of power

power supply task is to feed current to the plasma torch. Power supplies come in two types:

• Transformer. Weighty and consume a lot of energy, but they are less sensitive to temperature changes. In addition, the thickness of the workpiece, which is able to cut the unit can reach 40-50 mm;

The inverter has a compact size

• inverters. Lighter, compact and economical in terms of energy consumption. In addition, the inverters provide a stable arc.
  The disadvantages include the fact that they can be used for cutting sheets of a thickness of not more than 30 millimeters.

The compressor provides compressed air device with constant pressure

Compressor

To work plazmoreza requires gas that provides plasma formation and responsible for the cooling of the plasma torch. Therefore, the gas supply nozzle on the compressor used.

In the apparatus with the power current is not greater than 200 A, as a gas air is used. Such an apparatus can cut the workpiece up to 50 millimeters thick.

Industrial machine with other working gases such as argon, helium, nitrogen, hydrogen, etc.

Cable-hose package connects the individual components into a single unit

Cable hosepack

As I mentioned above, this element combines the individual components in the device plazmorez, ie Gas is supplied through the hose to the nozzle and the cable provides power supply to the electrode.

Operating principle

What is Plasma

With apparatus devices we figured, let's look at how plasma cutting machine is working, and that generally does the word "plasma". Thus, the plasma - is heated to a high temperature air or other gas in the ionized state. The heating temperature can be up to 30,000 degrees.

The diagram shows the principle of plasma cutting

The principle of operation of the device is as follows:

1. By pressing the ignition button electrode high frequency currents are supplied;
2. Between the nozzle and the electrode formed on duty arc whose temperature reaches 8000 degrees;
3. Then the supply of compressed air to the nozzle;
4. The air breaks through the arc, causing heated and increased in volume by a hundred times. When this happens its ionization, and the air becomes conductive properties;
5. In contact with the plasma arc cutting workpiece is formed, wherein the duty arc extinguishes. As a result, the metal is cut with ease, and the air blows it to the cutting line.

Apparatus for plasma cutting can be done by hand. This is usually used inverter welding machine, but you can perform device and "from scratch", using diagrams, available on the Internet.

Homemade plazmorez will cost several times cheaper than brand

nuances selection

Choosing plazmorez, you must pay attention to the following points:

• Versatility. There are machines that can be used not only for cutting metal but also for the stick electrode welding and for TIG welding.
  However, one should remember that flexibility is usually a bad effect on the quality of the operations and performance. As a rule, universal plazmorez can not cut the workpiece thickness greater than 11 mm;
• The current strength. The higher the amperage, the stronger the arc heats up, respectively, is performed plazmorezka faster and increases the maximum thickness part which is cut by the method.
  Therefore, pre-need to decide for what purpose you need plazmorez, ie with any details you have to work. If you cut steel with thickness up to 20 mm, the device will be enough with a current of 20 A.
  If the thickness of the metal will be greater, respectively, will need more powerful plazmorez - with a current strength of 40-60 A. In industrial vehicles can reach amperage of 200 A or more;

The current strength in domestic appliances is typically less than 40 A

• power supply type. Domestic plasma cutting machines can be powered by 220 V, but their current strength, as a rule, does not exceed 40 A. Industrial units operate on 380 V;
• Duty cycle. Each plazmorez has such a characteristic as the MF, which is calculated as a percentage. This figure indicates the time that the device can work.
  The basis of the duty cycle to 10 minutes. If px, e.g., 70%, then 7 minutes plazmorez can operate, then 3 minutes should cool. If the figure is 40%, the machine may not operate for more than 4 minutes, 6 minutes after which must cool.
  There are machines with 100% duty cycle, which can be used continuously. They usually implemented water cooling;
• Compressor. Plazmorez may be integrated or separate plug compressor. For domestic purposes a convenient tool with built-in compressor, but they are thin.
  If plazmorez need for professional work, you need a separate compressor. The main requirement for the compressor - ensuring a constant air pressure of the plasma torch, ie, without pulsation, and the air must necessarily be dry. In addition, the air pressure generated by the compressor, must necessarily comply with the requirements of the device;

Appliance plazmorez should be compact and convenient for transportation

• Convenience. Plazmorez should be of sufficient length cable-hose pack. If the machine is needed for domestic use, it is desirable that it is compact and convenient for transportation.

Apparatus for plasma cutting must be purchased with a small margin of power - it will increase its longevity.

A brief overview of models

Finally, a brief look at a few devices that have received positive feedback from users. These include:

• FoxWeld Plasma 33 Multi;
• TelWin Plasma 60 HF;
• Svarog;
• Resanta IRP-25;
• Dragon.

Household plazmorez FoxWeld Plasma has 33 Multi function Electric

FoxWeld Plasma 33 Multi

This model is a multi-functional household apparatus for plasma cutting, powered by 220 V. Its main feature is the ability to use as a welding machine for manual arc welding.

The maximum cutting current of this model is 30 A. This enables it to cut steel 8 mm thick.

The price of this unit is 33,000 rubles (the price is valid until spring 2017).

TelWin Plasma 60 HF - quality plazmorez from the Italian manufacturer

TelWin Plasma HF 60

This model can be attributed to the industry since it has a relatively high power - the current intensity is 60 A, moreover, it is designed to operate on the network 380 V.

The apparatus can cut steel up to 20 mm thick. In addition, the manufacturer draws attention to the following advantages of the model:

• The presence of a microprocessor to control many parameters of the device;
• Possibility of adjusting the current intensity;
• Built-in pressure gauge allows you to monitor the air pressure.

This plazmorez worth 110,142 rubles.

Svarog CUT-40 - powerful home plazmorez from Chinese manufacturer

Svarog CUT-40

This model is a powerful household plazmorez whose strength is current up to 40 A. This allows it to cut steel up to 12 mm thick. PV at the maximum current is 60% for domestic vehicles the figure is high enough.

It should be noted that in spite of the Slavic name "Svarog", this unit is made in China. But, despite this, to its quality and reliability users have no complaints.

Cost Svarog CUT-40 is 33,000 rubles.

In the photo Resanta IRP-25 - an inexpensive consumer plasma cutting machine

Resanta IRP-25

Resanta - is another home plazmorez Chinese production with a current of 25 A. The manufacturer claims that the "baby" is able to cut metal up to 12 mm thick.

Another advantage of this device lies in its relatively low cost - the price is 28 900 rubles.

Dragon - compact multifunctional device from domestic producers, water-cooled

Dragon

Dragon is a multifunctional device from domestic producers. In addition to plasma cutting and electric welding it is available.

Amperage Gorynycha have no big 3-10 A, which enables it to cut metal to 8 mm thick. Its main feature, in addition to versatility, is water cooling. This allows the machine to run continuously for 25 minutes.

Furthermore, it is very compact - the device weighs less than 0.7 kg. The price is in the range 43 000 rubles.

Output

Now you know how the plazmorez, and that the first thing to look for when you select it. Additionally, I recommend to see the video in this article. If some of the nuances you do not understand - write comments and I will gladly answer.