Welding inverter. Electric welding for beginners or how to learn metal welding. Organization of the workplace and reliable equipment of the welder
Any home master often has situations when it is impossible to do without the use of electric welding. Previously, in such situations, most often it was necessary to turn to professionals in workshops, since not every amateur could afford a welding machine. And the point is not at all the high cost (although this is also an important factor), but the fact that traditional transformer devices are very demanding on the power grid. By connecting it to a household network, most likely, you will get "knocked out" machines or blown fuses.
What is an inverter
Now there is a wide range of inverter welding machines, which are much less demanding on the power grid, are light in weight and compact in size. In addition, they are distinguished by a fairly democratic price. But buying is only half the battle, the main thing is to learn how to cook on your own. Apparatus inverter welding produces a two-stage conversion of conventional AC mains current.
First, the conversion to a current with high-frequency characteristics, and then to D.C., while the coefficient of performance (COP) reaches about 90%. Almost all inverter devices are designed for domestic use. and are designed for a voltage of 220 V. They are best cooked with electrodes with a diameter of 2 mm to 4 mm. An important advantage of such arc welding for beginners is the relative ease of igniting and holding the arc.
The basis for the teapot in matters of manual work welding machine- understanding how a seam is formed. An electric arc occurs when the interaction of the core of the electrode and metal surface. The coating lights up, and it begins to melt, goes into liquid state, gas is released. This gas surrounds the welding spot (weld pool) and prevents the penetration of air to it.
The molten metal from the core passes to the weld pool, partially mixes with the molten metal from it and solidifies, a seam is formed. The coating, which previously turned into a liquid state, solidifies, forms slag, which must be removed after welding. You can take welding lessons for beginners or practice on your own.
Necessary equipment and equipment
Before learning the basics arc welding, you need to prepare everything you need:
Don't forget to prepare your workplace- remove all interfering and flammable objects. It is advisable to have a fire extinguisher on hand., in the event of an emergency. In case of a retinal burn (“grab bunnies”), you need to buy special eye drops or use folk methods.
How to weld metal
So, everything is ready and you can comprehend the technique of electric welding for beginners. It is best to start the training course by welding two pieces of metal or pipe with a thickness of about 5 mm. First of all, it is necessary to clean the place of welding from rust and dirt with a conventional metal brush. If this is not done, it will be difficult to ignite the electrode, and the connection will be defective.
To weld parts of the specified thickness, you should use an electrode f3 mm. For such an electrode, a current of about 100 A should be set on the inverter apparatus. Most often, the adjustment scale on the inverter is lying and it is necessary to tighten it “according to the situation”, if the metal does not warm up enough, add it, if it burns, reduce it.
Welding work begins with the ignition of the arc, for this it is necessary to tap the end of the electrode on the metal or strike it like a match. It probably won't work the first time., but here is the case when you need to try, not look. After ignition of the arc, the electrode must be drawn along the seam line at a distance of about 2 mm, while “writing out” the figures, as if stitching the parts to be welded. Thanks to this, the seam becomes stronger and wider.
Now, regarding the length of the arc, 2 mm is the optimal distance in most cases, with a larger distance, the arc is not stable, the welding site does not warm up sufficiently and the connection is very weak. If the distance is too small, the seam is very convex, the welding area is insufficient, and as a result, a weak connection. Depending on the conditions and preferences of the welder, There are three methods of leading the electrode along the seam:
After welding the parts with a light tapping with a hammer, the slag should be separated and the resulting seam should be checked. Don't expect everything to work out the first time. To start cooking more or less correctly, to achieve the desired result and feel the welding process, you need to boil more than a dozen kilograms of electrodes.
The main thing is practice, but it must be supported by theoretical knowledge. If you are a beginner welder, you will need a tutorial for learning. You can also watch a video tutorial online.
Welding is the most reliable connection of one-piece parts. IN Everyday life it is widely used in the manufacture of fences using chain-link mesh, greenhouse frames, stoves for saunas and garages, or various containers needed for summer cottages. A person with skills welding work, is able to create on its own personal plot real masterpieces of openwork fences, roof sheds and other things necessary in everyday life.
What justifies the reliability of welding: the basics of welding
In terms of the strength of creating permanent joints, welding occupies a leading position. This is achieved by heating alloys from various metals using an electric arc, which leads to plastic deformation of the materials used. This is where the interpenetration takes place. elementary particles electrode into the structure of the materials to be joined. As a result, molecular bonds with ultrahigh strength appear.
Thanks to modern innovative technologies, now it is possible to use laser and electron beams, ultrasound and flame for welding gas burner. But for welding living conditions still the most optimal is electro arc welding, a source of energy, for the creation of an electric arc of which welding machines are used various types including inverters.
Welding methods
There are the following welding methods:
- gas press, using an oxyacetyl flame. The advantages of this type of welding are high productivity. So she finds wide application in the oil and gas industry, in particular in the construction of pipelines for the transportation of oil and gas, as well as in mechanical engineering.
- Contact, carried out by an electric current having a relatively low voltage at a sufficiently high strength current. This method includes the following varieties: butt welding, seam and spot welding.
In addition, in some cases, roller and electroslag welding, friction and thermite, as well as a number of other varieties are used.
Choosing the right equipment
If you decide to master the technique of welding, then you will need welding equipment. It can be rented or bought. Currently outlets offer welding machines equipped with a device that allows you to increase or decrease the current strength. lovers do everything with my own hands, can make a welding machine from improvised means. In any case, you will need one of the following electrical energy converters:
- Transformer for converting the alternating current of a household electrical network into the current necessary for welding. When choosing a unit of this type, it must be borne in mind that cheap models will not be able to provide the necessary stability of the electric arc. They are characterized by "sagging" voltage. Plus, they're too heavy.
- Rectifier. This is a device that converts alternating electric current supplied to consumer networks into direct current. Unlike transformers, these units provide sufficient stability of the electric arc, which, in turn, improves the quality of the weld.
- inverter. It converts the alternating current of the household power supply into the required direct current, with the voltage necessary for high-quality welding. This apparatus is characterized by compactness and light weight, easy ignition, fast action and high performance.
** Recommendation. The most efficient of these devices is considered to be an inverter, which is characterized by efficiency and high performance.
How to choose the right electrodes for welding
The most common, arc welding, requires electrodes that are designed to supply current to the weld. In most cases, this is a wire consisting of a special melting powder. But for those who are faced with welding for the first time, it is better to use electrodes in the form of solid rods coated with a melting compound. They allow even a beginner to make an even seam. The optimal diameter of the electrode rod for this category of welders is 3 mm. Smaller diameter electrodes are used to connect thin sheets metal, and for use
Larger diameter electrodes require higher power equipment.
Welding safety (welder equipment)
Welding work is accompanied by bright light radiation and a lot of splashes of hot metal. Therefore, the welder must take care to protect the skin of his face and eyes from burns. For these purposes, you will need a special shield and mask. But not only the face and eyes need protection. The skin of the hands is prone to burns from flying splashes of melting metal in more. Therefore, mittens made of canvas or suede - necessary remedy security. Perfect option- the presence of a dressing gown or overalls made of dense tarpaulin or rubberized fabric.
In order to ensure fire safety, in places where welding work is carried out, there must be a container with water or other means that protect against fire if an accidental spark hits.
Step-by-step instructions for performing welding work
- The surface to be welded must be carefully protected. It should be free of dirt and rust.
- Before starting welding work, it is necessary to insert the electrode into the holder of the welding machine and create an electric arc. To do this, it is necessary to cause the movement of current in the welding zone. This process can be carried out by striking the electrode rod on the metal or by touching the surface of the workpiece in the form of tapping.
- As soon as an electric arc appears, it is necessary to create a gap between it and the surface to be joined. This gap should have a constant value and be in the range from 3 to 5 mm.
** Recommendation. To obtain a smooth seam, without defects, it is necessary that the gap remains constant throughout the entire time of welding. Otherwise, the arc will be interrupted and the quality of the weld will deteriorate.
- The angle of inclination of the rod should be 70?. But it can be changed, in order to ensure the comfort of welding.
- Equally important is the stability of the supply electric current. It must be borne in mind that too much of its force will cause the metal to melt, and at a low one, the arc is extinguished.
After you have mastered the technique of making a weld in the form of a roller, you can proceed directly to making permanent joints. Work begins with the creation of an arc. Then the welder proceeds to the direct connection of the parts. At the same time, his hand must make oscillatory movements from one element to another. The weld (trajectory of movement) can be made in the form of a herringbone, loop, zigzag, etc. At the end of the work, it is necessary to clean the seam from the resulting slag.
Once you master the basic skills of welding, you can move on to more complex operations, making butt and tee joints, as well as overlap and corner, moving in different directions. As soon as the hand gains confidence, you can start making more complex products.
Video - manual arc welding for beginners
Electric welding is the most common way to obtain a permanent connection. The availability and simplicity of welding equipment allow even novice electric welders to assemble simple metal structures on their own.
Those who want to learn how to learn how to weld parts should start with the basics of electric welding using electrodes.
Before starting any training, you need a home craftsman. First of all, this applies to welding machines and electrodes, and then move on to the basics.
For one-time work, you can rent a welding machine from specialized companies, but if there is a lot of work to be done, best solution there will be a purchase of a reliable, with a sufficient level of power of the unit.
You can do gas welding, but this is a more expensive method. For various purposes, the industry produces the following types of equipment:
- welding machine (transformer), designed to convert alternating currents into welding current great strength. Cheap welding machines can overheat greatly even at low loads, and they produce uneven welding current with large drops;
- Rectifiers convert AC power to DC. These are the most productive devices with good performance, but they are much more expensive;
- modern inverters are capable of converting alternating current to direct current, they are characterized by high performance characteristics with small dimensions and weight. It is by far the most affordable reliable appearance welding equipment, many welders use them. This best option for beginners, where you can work out the basics of working with electrodes.
Beginners need to know that electrodes are used for arc welding. Information about the electrodes refers to the basics of learning. The success of welding depends on the quality of the electrode and the composition of the core.
The product is quite simple in design. This is steel wire various materials and alloys, with a special coating (coating) applied to it.
The coating prevents unwanted gases from entering the weld pool. For domestic use most suitable electrodes with a core thickness of 3 mm. produced by electrodes with a cross section of 2 mm.
Organization of the workplace and reliable equipment of the welder
When welding with electrodes, a strong infrared radiation. To protect the eyes and skin, a special welding helmet and protective clothing made of dense material must be used.
It is better to buy a welding helmet with chameleon glass, with the ability to adjust the degree of glass darkening. On your hands you need to wear split gloves or mittens. Protective clothing should be worn regardless of whether you are a beginner welder or a specialist.
The place of welding must be enclosed with protective screens to protect the eyes of others, especially at home. Welding shoes must not be nailed.
In such shoes, the welder will constantly dance even with slight dampness of the air. Be sure to properly ground the work area before welding.
Having finished preparatory work you can start learning welding and getting the basics.
Sequencing
Step-by-step instructions provide for the implementation of several types of work. First you need to equip the welding inverter. It has 2 cables coming out of it. One is designed to connect the ground wire.
On another, of sufficient length, they connect an industrial or homemade holder. The process of learning electric welding is a rather complicated and time-consuming process.
Current regulation
The Welding Guide includes information about machine settings. Welding current is subject to mandatory adjustment. First, you do not need to set the maximum value of this value.
All data are indicated in the table on the packaging of the electrodes. You need to set a lower value and start learning.
With experience, when you can strike an arc and do the simplest seam, it is necessary to set a higher value of the welding current. This will allow you to better warm up the metal and make a better seam.
welding arc
Welding lessons for beginners cannot be imagined without learning how to strike an arc. At first, the electrode will constantly stick to the metal. There are 2 ways to start the arc:
- by holding the tip of the electrode along the surface of the parts;
- The arc can be ignited by tapping the electrode. Sometimes, when using MP-5 electrodes, the welder has to knock often and for a long time.
In the first case, there are no significant marks on the parts, the second method is important with a large layer of coating on the tip of the electrode. Sometimes it is necessary to grind the ends of the electrodes before welding.
It's very easy to learn. You just tap, and when igniting the arc, the main thing is not to stick the electrode into the molten metal and not to carry it over a long distance. In the first case, the arc will go out. The second option will lead to the formation of strong spatter and violation of the bead of the seam.
It is better to learn on thick metal. Only after learning how to ignite the arc and keep it burning, you can proceed to the next stage of training.
We develop the correct angle of inclination
The most common electrode position is a tilt span of 30° to 60°. Very rarely there is a need to cook, holding the core at a right angle. When choosing a slope, it is necessary to monitor the behavior of the slag in the weld pool.
It should securely cover it, but without spreading the metal. You can not go much ahead of the bath. To begin with, place the holder at a right angle, and gradually making the angle sharper, achieve normal filling of the weld pool with slag.
The quality of welding depends on the development of the normal position of the electrode holder. A novice welder should work, laying seams only in the lower position, on thick metal.
Having mastered the basics, you can gradually move on to the horizontal and vertical seam. Depending on the thickness of the parts, you will also have to adjust the angle. Over time, this operation will be performed automatically.
holder movements
For this, it is necessary to hold the tip of the electrode core at least 2 mm away and see the weld pool.
The problem for beginners is the need to perform several actions at once. For better filling the joint bead, it is necessary to guide the electrode in several ways.
For welding metal with a thickness of more than 6 mm, it is better to use a triangle motion. And less than this thickness of parts, it is better to use a broken zigzag welding line.
At first, only these methods of leading the electrode will be required. Pay attention to the constant size of the oscillatory movements. It may be necessary to guide the electrode in a straight line at first to gain skill.
Don't think that you will succeed on the first try. This is a long process, so be patient while learning the basics.
Basic rules for joining parts
After the basics of welding have been mastered, it is necessary to independently weld metal structures, proceed to perform the simplest operations for assembling and tacking nodes at home. Usually, House master does not weld thick metal, so cutting edges is not required. To get started, you can practice connecting profile pipe. To do this, you need to cut sharp corners at the ends of the parts, for larger area penetration.
Parts are inserted into angle clamp and secure with a clamp. Now you need to pre-grab from several sides. To do this, light an arc and put a small dot.
It is not required to withstand a large leg, you just need to fix the parts. After checking the diagonals, tacks are performed from all available sides. Now they remove the structure and scald it with a reliable and high-quality seam.
If the lessons on the angle of inclination, laying the metal in a molten weld pool are well learned, then the assembly operations of metal structures will not cause difficulties even for dummies in the welding business.
Having studied the basics of welding and gained theoretical knowledge, you need to practice as often as possible, put on welding equipment, turn on the welding machine and for a long time hone your skills. Only practice will allow you to become a high-class welder.
Inverter welding for beginners has its own characteristics and requirements, because those who pick up such a unit for the first time should know what it is for and how it works. This equipment is used to connect metal sheets due to an electric discharge. Unlike older models, inverters are much easier to operate, and itself is nothing complicated.
The popularity of this technique is due to the fact that, despite its compact dimensions, the versatility of the device allows you to perform enough complex work which the old transformers could not fulfill. All the electricity consumed is used in the creation of the arc and the welding process, so the efficiency will be higher and the energy consumption will be lower.
What is important and important to know?
Inverter-type welding machines are convenient to use for those who will deal with welding for the first time. Firstly, they are economical, and secondly, the welding technique is quite simple, so even a beginner can handle it.
The inverter is powered by the electrical network, respectively, in the working process, the entire load goes to it. But, unlike the old prototypes, when such equipment is connected to the network, there will be no sudden surges in electricity, moreover, the device implies the presence of a special storage capacitor.
- You should know that electric welding is carried out by such a working element as an electrode. Its size will affect the amount of electricity consumed, that is, the larger it is, the more current is needed. If you do not pay attention to this point in time, then when you turn on the device in the network, there is a chance to burn not only your own equipment, but also your neighbor's.
- To weld metal correctly, you should know what are the minimum requirements for the electrode to electricity. The fact is that if the indicator is lowered below the minimum, then the seam simply cannot be created. At a strong current, the electrode burns out quickly, and although the joint is obtained, its quality leaves much to be desired.
- It is important to know the angle of inclination of the electrode, since this moment directly affects the thickness of the resulting joint.
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How to learn how to work with an inverter?
Wire welding has its basic steps. If a beginner carefully reads them, then everything will work out for him. But it should be said right away that it is best to start training on unnecessary details, i.e. until you fill your hand. This is necessary in order to feel the equipment, as well as to understand how to properly hold the electrode so that the seam is thin, but of high quality and neat.
So, the guide to action is as follows:
- First of all, you need to take care of your safety. Since the work will take place with hot metal, there is a risk of splashing. Therefore, it is imperative to prepare a set of working clothes, which will include protective gloves(but by no means rubber), a special protective helmet that has a shield with glass for visibility, and a rough outerwear(jumpsuit and jacket or just a jacket). And be sure to wear closed shoes.
- The next step is to set up the tool. To do this, the current is set to the required values, which must correspond to the working electrodes. Optimal size V this case will be 2-5 mm. The current is regulated with the calculation of the thickness of the metal and the size of the part. It is also convenient for beginners to use the inverter because modern models have symbols on their body that will tell you the power of energy used at a particular thickness. To avoid sticking of the electrode, the tool should be brought to the future joint gradually. You also need to connect the ground terminal to the work surface.
- Wire welding begins with the ignition of the arc. The electrode itself must have an inclined position (45°) in relation to the working surface. In order for the element to activate, they need to touch the metal several times. Optimal Distance between the parts is equal to the size of the electrode.
- These actions will help create Weld. But it is worth knowing that scale is formed during the welding process. This is molten metal that can be removed with a hammer or other similar heavy object.
There is nothing complicated in welding with an inverter, so everyone can learn this process.
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Arc control: features
Of course, the work itself is quite simple: then bring the electrode to the surface, then take it away. But the fact is that the quality of the seam largely depends on the ability of the operator to control the gap between the electrode and the surface. Depending on this indicator, there may be some problems:
- if the gap is small, then the welding spot will become prominent, especially the layering will be visible on the sides;
- when the gap has a greater distance, the metal will not weld properly, and the arc itself will constantly disappear.
Both the first and second cases significantly affect the quality of the welded part, in addition, appearance such a joint would leave much to be desired.
If the correct spacing is observed, a vertical seam or a horizontal seam will have uniform adhesion. In addition, beginners should be aware that in welding there is such a thing as a weld pool.
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Wire welding: seams and their defects
As in any other business, a beginner can early stages problems with creating a neat joint. And this is normal, because the first time rarely everything turns out perfectly.
50% of the quality of the seam depends on how much the operator has learned to strike the arc and how evenly and correctly the gap is maintained. It is these moments that can be affected by the speed at which the electrode moves, along which trajectory (zigzag, back and forth, etc.), what is the strength of the current used and at what angle the working element is located.
The type of metal largely affects the welding technique. At this point, as noted above, the size of the electrode will also affect. The wire insertion speed can be different. If you do this too quickly, then most likely they will form defects on the joint surface.
The optimal welding method is considered to be a circular or zigzag motion.
But in the first case, it is necessary to constantly monitor at what level the seam is located so that the weld pool is evenly distributed throughout the area. As for zigzag movements, then here important point is the control of the joint from all sides.
The beginner should be aware that the weld pool will always move to where the heat point is. This point is important when the electrode is displaced.
An undercut can be formed at the moment when, during the transverse movement of the wire, there is a shortage of metal in the bath. To avoid this, it is important to keep under constant supervision not only the weld pool, but also the edges of the seam.
A novice operator should be aware that the bulge of the joint will directly depend on the verticality of the electrode, that is, the higher it is, the smaller the volume. This is due to the fact that under the wire is concentrated maximum warmth, which means that the bath itself goes down. With a slight slope, the energy will go back, and the joint itself will rise, and if you tilt the electrode too much, then all the force will go along the seam, which will create a problem in controlling the bath.
Therefore, by adjusting the angle of inclination of the working element, you can control the movements of the weld pool yourself. To make it convenient to carry out the whole process, it is best to perform it within 45-90 °, so that the bath always remains under control.
In fact, wire welding is not difficult, it just requires experience and stuffed hands. Therefore, of course, it is better for a beginner to start training on unnecessary metal elements so that when the time comes for serious work, he can complete the seam with high quality and accuracy the first time.
It is enough for any person to learn how to choose a good inverter welding machine, and how to cook with an inverter, in order to never have problems in everyday life associated with the need for a high-quality connection of various steel and metal products.
1 Briefly about the device of the welding inverter and its key advantages
Inverter equipment won true love at home craftsmen due to the fact that it allows everyone to do welding work with their own hands. A standard inverter for welding structurally includes:
- electronic frequency converter;
- control system;
- mains rectifier and filter;
- power rectifier;
- high frequency transformer.
The modern device of such equipment provides an excellent weld, which is easy for anyone to achieve. At the same time, the inverter is a very compact unit. It doesn't take up much space. And the weight of the equipment is in the range of 5–15 kilograms, which makes it possible to use it as a mobile welding device.
It is enough to learn how to use the inverter correctly, and it will become your reliable assistant in household chores. Instructions for inverter equipment from a particular manufacturer usually describe in detail how to connect a welding inverter, which electrodes to choose for connecting products made of alloyed, carbon, and different metals.
True, it happens that the instructions for the device are not attached. Or does it exist, but foreign language. It is clear that it is necessary to clearly understand how to properly weld such a "passportless" installation, otherwise the performance of work by a welding inverter, instead of satisfaction from the measures taken, will only bring trouble to its owner. About general rules We will discuss the use of welding inverter equipment below.
2 Preparing the inverter for operation
Before you start welding, you need to prepare a mask, safety shoes and clothing. Without this inventory, it is strictly forbidden to cook with a welding unit. You will also need to select specific brands of electrodes for connecting parts and structures made of a particular metal (we will discuss the rules for choosing welding rods later). A brush with steel bristles will not hurt, with which it will be possible to clean surfaces for welding.
After that you need to do correct connection welding machine. Since the described equipment has considerable power, it is necessary to analyze in advance the capabilities of the power supply network from which the inverter will be powered. All models welding inverters intended for domestic use, are connected to the 220-volt network. In this regard, you should not have any problems.
It is only important to install a circuit breaker with the required characteristics, so as not to worry about short circuit and other troubles with the electrical network. Next, you need to prepare a site on which welding will be performed. She must be free from foreign objects and structures that restrict the movement of the welder. Easily flammable things, flammable and explosive compounds are not allowed near the place of work.
After making sure that the workplace is safe, we put on overalls and protective equipment, and then:
- connect wires and cables to the inverter;
- insert the welding rod into the holder;
- connect the mass terminal to the workpiece to be welded.
Now with the help of the device you can cook a variety of products.
3 Key Features of Inverter Application
To use the welding unit for its intended purpose, you first need to ignite the electric arc. To do this, we bring the end of the electrode at a certain angle to the steel (metal) surface and perform a light striking movement along it. If the rod is successfully ignited, a small flash will appear, the metal will begin to melt. You can start welding.
It is necessary to weld the metal in such a way that during the process the rod is from the surface to be welded at a distance approximately equal to the cross section of the selected electrode. As a rule, carbon steels and many other metals are connected on a direct current in polarity. However, some alloys are welded exclusively on reverse polarity current. Don't forget about it. When carrying out the planned event, constantly monitor the quality of the resulting seam and the penetration of the product.
Please note that the welding current on the inverter is regulated very efficiently and at the same time smoothly. You should have no problem adjusting it to the required value. With a low current strength, the joint may turn out to be poorly welded. But if too much is chosen high current, there is a possibility of burning the surface. When using rods for welding of small thickness (up to one and a half millimeters), it is possible to weld metal with a thickness of one to three millimeters without difficulty.
The current strength when performing such work is usually taken from 20 to 60 amperes. If electrodes are used larger section, it becomes possible to weld metal with a thickness of 4-5 millimeters. In this case, it is required to choose a current of about 100 amperes. After you have completed the welding process, knock out (with light blows) the scale that has formed on the resulting joint, and then clean the seam with a brush.
Such a simple event will ensure its attractive appearance. And don't be too upset if your first steps in the field of welding are unsuccessful. Believe me, with the implementation of each subsequent welding procedure, everything will turn out much better. In this case practical experience means much more than all the advice on how to properly use the inverter unit.
4 Tips for choosing electrodes for the inverter and the welding machine itself
The quality of the inverter depends to a large extent on the type and brand of electrodes used. There are several general recommendations on the choice of welding rods for the inverter machine. So, medium and low carbon steels are recommended to be welded with carbon electrodes ( OZS-4, UONI 13/45, MR-3 and others). But it's better to cook with rods TsL-11, which are produced according to State Standard 10052. Cast iron surfaces are well connected when using rods OZCH-2, stainless - TsL-11.
If you have to weld steels with a low carbon content, it is best to stock up on ANO series electrodes, which are coated with a rutile or ilmenite composition ( ANO-4 and ANO-6 respectively).
We add that specialists in the implementation of complex welding work use electrodes of the UONI brand. But for welding without loads with critical parameters, it is better to use the less expensive ANO and MP-3. They are suitable for almost any type of welding produced at home or at their summer cottage.
- welding current setting interval - from 160 to 200 A (you can buy devices with a lower current strength if you do not plan to weld thick hardware or structures made of "exotic" alloys);
- open circuit voltage - up to 90 V (there are units on the market for which this figure is 50–60 V, and it is them that professional welders advise amateurs to purchase);
- the duration of the installation without interruption is 40–80% (the larger this value, the less "intermissions" will need to be done during welding).
And another one important recommendation. If your household electrical network is not particularly stable, it periodically experiences power surges, it is advisable to purchase inverter equipment that can operate from a generator, as well as at reduced (increased) voltage. Specified technical capabilities inverter must be indicated in its passport.
