How to weld correctly with a welding inverter. How to properly weld metal with an inverter welding machine Basics for a novice welder
You bought a welding machine and want to learn how to weld with an inverter for beginners.
There is no need to be afraid of difficulties! The inverter machine is easy to use; anyone without experience or knowledge can master the welding process in a short time.
Equipment, equipment, safety precautions
Safety precautions. Welding production is associated with electrical voltage, or in common parlance - current. The current is invisible, but can kill a person.
We check the welding cables for serviceability and connect them to the inverter equipment. Return cable with a clothespin on metal to the negative connector. Cable with electrode holder to connector +. We insert the electrode into the electrode holder.
When connecting the device to the network, visually evaluate the current-carrying cables for serviceability. After making sure that the cables are in good condition, we plug in the plug into the socket and the toggle switch on the device, having previously set the current regulator to the lowest value. If the cooling fan starts working smoothly, without crackling or noise, then everything is fine.
Metal weight. When connecting heavy structures, take precautions. If multi-ton products collapse, they can lead to death or disability.
Equipment. Welding production involves high temperatures. The welder must have:
- canvas mittens (gaiters);
- robe (special suit);
- mask with a light filter;
- respirator for work in confined spaces;
- boots with rubber soles.
Gaiters are used when welding at heights, when arms are raised up, and mittens in other cases.
Other accessories:
- welding machine;
- hammer;
- brush;
- electrodes.
Electrodes are selected according to the metal (carbon content, additives) and diameter, depending on the thickness of the metal and the technical characteristics of the inverter.
Inverter Welding Basics
For beginners, experienced welders advise attaching the holder cable to the body, pressing it with the elbow of the arm and wrapping it along the forearm (from the elbow to the hand), and taking the holder in your hand. This way the shoulder joint will pull the cable, and the arm and hand will remain free. The method will help you manipulate your hand with ease.
Correct placement of the cable on the forearm. You should not work with bare hands.
If you simply take the holder in your hand without wrapping the cable around your forearm, then during the welding process your hand will get tired and wrist movements will cause the cable to dangle. Which will affect the quality of the welded joint.
How to cook using inverter welding correctly? We set the welding current on the machine according to the diameter of the electrode, the type of connection and the welding position. Setup instructions are available on the device and the electrode pack. We take a stable stance, move our elbow away from the body (no pressing), put on a mask and begin the process.
For beginners, it is better to start welding with an inverter with metal workpieces larger than 20 cm.
It is known that a beginner, putting on a mask and lighting an arc, stops breathing, trying to boil the entire length of the workpiece in one breath. With short products, you will develop the habit of cooking in one go. Therefore, practice on long workpieces, learning to breathe properly when welding.
Workpieces (plates) on the work table can be placed in a horizontal plane - vertically towards you or horizontally, it makes no difference.
At the beginning of welding, place the electrode clamped in the holder at an angle of 90 degrees (perpendicular) and move it towards the seam by 30-45 degrees. Light the arc and start moving.
The distance between the surface to be welded and the electrode is 2-3 mm, imagine that you are running a pencil along a sheet of paper.
Please note that when welding, the electrode decreases as it burns - gradually bring the melting rod closer to the surface at a distance of 2-3 mm and maintain an inclination angle of 30-45 degrees.
Video:
How can a beginner learn to weld with a welding inverter?
First we learn to light and hold an arc. Feel the edge when to bring the electrode closer to the surface to be welded during combustion so that the arc does not interrupt.
The electrode is ignited in two ways:
- tapping;
- chirping.
The new electrode ignites easily. A slag film appears on the working rod, preventing ignition. You just need to tap longer to break the film.
Video: What is arc force on a welding inverter and how to use it.
It is better for a beginner to first learn on a thread seam; the electrode is held smoothly, without oscillatory movements.
After mastering thread technology, proceed to welding metal with oscillatory movements. Which are used on thick metal for heating, holding the electrode at a certain point using movements - herringbone, zigzags, spiral or your own method.
Types of oscillatory movements
At the beginning of the connection, we carry out several movements from left to right, forming a weld pool and go along the seam making oscillatory movements. The angle of inclination of the electrode is 30-45 degrees. After passing, we beat off the slag with a hammer and clean it with a brush. Take care of your eyes, wear glasses.
Tip: at the end of the weld, make oscillatory movements to the sides and move the electrode towards the deposited metal. This trick will add beauty to the welded joint (get rid of the crater).
Video: how to weld corner joints, butt joints and overlap joints.
Seams are divided into:
- single-pass (one pass replenishes the thickness of the metal);
- multi-pass.
A single-pass weld is performed on metals up to 3 mm. Multi-pass seams are applied for large metal thicknesses.
Welders check the quality of the seam with a hammer - they strike next to the seam. If the seam is smooth, without irregularities, then after the impact the slag flies off completely, there is nothing for it to catch on. It is important to select the correct temperature regime: an overheated seam (hot) will break, an underheated one - there is a risk of lack of penetration.
The current is selected based on the diameter of the electrode, in theory 30 A per 1 mm of electrode diameter.
Direct and reverse polarity when welding with an inverter
Let's consider polarity when welding with an inverter. With a DC connection, the movement of electrons is constant, which reduces spattering of molten metal. The seam is of high quality and neat.
The device has a choice of polarity. What is polarity is the direction of movement of electrons depending on the connection of cables to equipment connectors.
The polarity is indicated on the pack of electrodes; these instructions will help you correctly connect the wires to the equipment.
Welding thin metal with an inverter
The essence of connecting thin plates comes down to selecting small-diameter electrodes and adjusting the welding current. For example, for metal with a thickness of 0.8 mm, electrodes with a diameter of 1.8 mm are used. The current on the inverter is set to 35 A.
Technology occurs in intermittent movements. Watch a video showing how to join thin plates in detail.
Video:
How to cut metal with a welding inverter
To properly burn a hole in a pipe, we set the current on the device to 140 A for a 2.5 mm electrode. We light the electrode, placing it in one place to warm up the metal and press it in. We move the electrode to a new place, warm it up and press it in. Gradually, we cut a hole in the pipe.
Pipe cutting
When cutting, it is better to place the plate vertically so that the molten snot flows down. If you cut in a horizontal position, icicles will harden at the bottom of the cut. That's all the tricks!
Beginners are tormented by the question, which polarity of wires is better when cutting with an inverter?
Video:
P.S. Text material and videos will help you master inverter welding for beginners in a short time. Good luck!
Welding is the most reliable connection of permanent parts. In everyday life, it is widely used in the manufacture of fences using chain-link mesh, greenhouse frames, stoves for bathhouses and garages, or various containers needed in summer cottages. A person with welding skills is able to create real masterpieces of openwork fencing, roof canopies and other household necessities on his or her plot.
What is the basis for the reliability of welding: the basics of welding work
In terms of the strength of creating permanent joints, welding occupies a leading position. This is achieved by heating alloys of various metals using an electric arc, which leads to plastic deformation of the materials used. In this case, mutual penetration of elementary particles of the electrode into the structure of the materials being connected occurs. As a result, molecular bonds with ultra-high strength arise.
Thanks to modern innovative technologies, it is now possible to use laser and electron beams, ultrasound and gas burner flames for welding. But for welding in domestic conditions, electric arc welding remains the most optimal, a source of energy for which various types of welding machines, including inverters, are used to create an electric arc.
Welding methods
The following welding methods exist:
- Gas press, using an acetyl oxygen flame. The advantages of this type of welding are high productivity. Therefore, it is widely used in the oil and gas industry, in particular in the construction of highways for transporting oil and gas, as well as in mechanical engineering.
- Contact, carried out by electric current having a relatively low voltage at a sufficiently high current strength. This method includes the following varieties: butt welding, seam welding and spot welding.
In addition, in some cases, roller and electroslag welding, friction and thermite welding, 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 purchased. Currently, retail outlets offer welding machines equipped with a device that allows you to increase or decrease the current. Those who like to do everything with their own hands can make a welding machine from improvised materials. In any case, you will need one of the following electrical energy converters:
- Transformer for converting alternating current from a household electrical network into the current necessary for welding work. When choosing a unit of this type, it is necessary to take into account that cheap models will not be able to provide the necessary stability of the electric arc. They are characterized by a “sag” of voltage. Plus they are 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 electrical network into the required direct current, with the voltage necessary for high-quality welding. This device is compact and light weight, easy to ignite, fast action and high performance.
** Recommendation. The most effective of the listed devices is considered to be an inverter, characterized by efficiency and high performance.
How to choose the right electrodes for welding
The most common type of 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 encountering welding for the first time, it is better to use electrodes in the form of solid rods coated with a melting composition. They allow even a beginner to create an even seam. The optimal diameter of the electrode rod for this category of welders is 3 mm. Smaller diameter electrodes are used to join thin sheets of metal, and for use
Larger diameter electrodes require higher power equipment.
Safety of welding work (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 it's not just the face and eyes that need protection. The skin of your hands is more susceptible to burns from flying splashes of melting metal. Therefore, mittens made of canvas or suede are a necessary means of ensuring safety. The ideal option is to have a robe or overalls made of thick canvas or rubberized fabric.
In order to ensure fire safety, in places where welding work is carried out there must be a container of 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 current movement in the welding zone. This process can be carried out by striking the electrode rod against the metal or by touching it to 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 connected. This gap should have a constant value and range from 3 to 5 mm.
** Recommendation. To obtain an even seam without defects, it is necessary that the gap size remains constant throughout the entire welding process. Otherwise, the arc will be interrupted, which will lead to deterioration in the quality of the weld.
- The angle of inclination of the rod should be 70?. But it can be changed in order to ensure the comfort of welding work.
- The stability of the electric current supply is also important. It must be taken into account that too much force will cause the metal to melt, and if it is too low, the arc will be extinguished.
After you have mastered the technique of making a bead weld, you can proceed directly to making permanent connections. Work begins with creating an arc. Then the welder proceeds to directly connecting the parts. At the same time, his hand must make oscillatory movements from one element to another. The weld seam (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 any slag that has formed.
Once you have mastered basic welding skills, you can move on to more complex welding jobs, making butt, tee, lap, and corner joints in a variety of directions. Once your hand gains confidence, you can begin making more complex products.
Video - manual arc welding for beginners
When we mention the word “welding,” we immediately imagine a complex process with many nuances, rules, difficult-to-use machinery and equipment, and requirements for the worker’s skill level. But this is not always the case. Modernity, with all its technical innovations, does everything to make human life as easy as possible. It did not bypass the welding process either. It turns out that you can know how to weld on your own without special qualifications or skills in using complex welding equipment, and welding with an inverter for beginners will not seem so difficult. All you need is to purchase an inverter for welding and follow the rules on how to learn to weld with inverter welding. Inverter Welding Basics for Beginners and Inverter Welding Lessons for Beginners are given below.
Inverter welding technology implies the mandatory use of this device for work. At its essence, an inverter is a device that converts alternating current from our regular 220 V outlet into direct current, while changing the frequency. Another plus is that such a serious device uses your electricity very economically and does not noticeably change the voltage reading. There are inverter devices that operate at a voltage of 380 V. Welding with a three-millimeter electrode will be possible at a voltage of 170 V. But it is better to check this in the operating instructions for a particular type of inverter. Such low voltage is usually typical for villages and small towns.
Visually, the device is a metal box, with indicators of some indicators: overheating and power supply, sometimes there are grilles for better cooling of the contents, with a strap for easy carrying and a handle. Weight approximately 3-6 kg. The inverter has a knob that regulates the welding current, two holes for cables - plus and minus. One is used as a clothespin for the part, the second is used for the electrode holder. It is recommended to purchase an inverter with cables of the correct size. Sometimes they are too short. Also, cables should be as flexible as possible for convenience.
How to choose a welding inverter? Quite simple. Prices for inverters are quite affordable. But there is a price range. Buying the most expensive one is not the best option for a person just learning the basics. Working with a welding inverter manufactured by Resanta is convenient and productive.
When answering questions about how to use a welding inverter, how to properly weld with a welding inverter, and how to learn to weld with a welding inverter, first of all, you need to say the following. Before welding correctly with inverter welding equipment, be sure to carefully read how to weld with a welding inverter from a specific manufacturer. Possible several times. The principle of operation of inverters is the same, but in other indicators there are many differences that cannot be outlined in any universal welding manual.
How to weld parts? Basic techniques and secrets for beginners.
Any welder knows how to weld with a welding inverter. Inverter welding is based on a completely classical principle. The metal is welded by an inverter from the high temperature of the electric arc. In order for an arc to appear between the electrode and the metal part, they must be connected to different poles. The choice of plus or minus for the electrode and metal depends on the thickness of the part to be welded. There is a division into direct and reverse polarity or electrode-negative and electrode-positive. The last name for the varieties of polarity is more understandable. With direct or electrode-negative polarity, the welding electrode is connected to the minus, and the metal part to be welded is connected to the plus. If you swap them, the polarity will be reversed or the electrode will be positive.
There is a difference between these two types of connections. The welding electrode or welding part will heat up more if a positive charge is attached to it. This happens because the electrodes in the arc move from minus to plus, which makes the temperature of the plus higher. If the thickness is 3 mm, it would be more expedient to connect a positive charge to the pipe. Pipes of this thickness need to be significantly “warmed up” to obtain a good seam. Therefore, by attaching a plus to the pipe, the metal will melt better, the seam will be of high quality and durable. If the pipe is made of, then a positive charge can “burn” it, thereby rendering it unusable. Therefore, it is better to connect a minus to it.
What is a weld and how to make it?
The metal you are going to “cook” must be . It must be cleaned of excess: rust, paint. The edges must be treated with solvent. There should be no traces of grease or paint on them.
Next, we connect the welding cables where necessary, select the desired electrode, and set the current value. The table below shows how to select the right electrode. The diameter of the electrode depends on the thickness of the product to be welded. Recommended values are given.
How to use a welding inverter?
Do not hurry! If you rush to make a seam, you will most likely end up with a poor-quality connection.
During the welding process, the current value can and should be changed if required. If you see that when creating a seam you get not rollers, but something like blurry lines, then you should increase the current. If the rollers are so huge that it becomes difficult to move the electrode holder, we reduce the current indicator.
If you are using not just purchased electrodes, but those that have been stored for some time in damp places, then they need to be dried for about two to three hours at a temperature of approximately 2000 degrees.
There are two ways to ignite an arc:
Hit the tip of the electrode against the product several times;
Use a method similar to lighting a match.
So, this is the basic information, tutorial and rules that you need to know and follow if you decide to learn how to weld metal with a welding inverter. Welding for beginners, of course, is characterized by initial failures. Initially, you will need to learn how to perform each stage of work several times to bring it to the proper level. You will have to train, use a lot of “test” electrodes, pieces of metal, learn how to light an arc well and the first time. But, you see, this is a small price to pay for the opportunity to learn how to learn how to properly weld with a welding inverter yourself from scratch and save on the services of specialized companies. The inverter welding technique is quite transparent and simple. Having gone through all the trial stages and learned the lessons on welding with an inverter for beginners, you will be able to weld on your own without any problems.
In a private house, in a country house, in a garage and even in an apartment - everywhere there are many jobs that require metal welding. This need is especially acute during the construction process. Here, especially often, something needs to be cooked or cut off. And if you can still cut it with a grinder, then there is nothing to reliably connect the metal parts with except welding. And if the construction is carried out with your own hands, then the welding work can be done independently. Especially in places where the beauty of the seam is not required. We will tell you how to properly weld by welding in this article.
Basics of electric welding
Welded metal joints are the most reliable today: pieces or parts are fused into a single whole. This happens as a result of exposure to high temperatures. Most modern welding machines use an electric arc to melt metal. It heats the metal in the affected area to the melting temperature, and this happens over a small area. Since an electric arc is used, welding is called electric arc welding.
This is not quite the correct method of welding)) At a minimum, you need
Types of electric welding
An electric arc can be formed by both direct and alternating current. Welding transformers use alternating current, and inverters use direct current.
Working with a transformer is more complicated: the current is alternating, so the welding arc “jumps”, the device itself is heavy and bulky. The noise that both the arc and the transformer itself makes during operation is also quite annoying. There is one more problem: the transformer greatly “stresses” the network. Moreover, significant voltage surges are observed. The neighbors are not very happy about this fact, and your household appliances may suffer.
Inverters mainly operate from a 220 V network. At the same time, they are small in size and weight (about 3-8 kilograms), operate quietly, and have almost no effect on voltage. The neighbors won't even know you started using the welding machine unless they see you. In addition, since the arc is caused by direct current, it does not jump and is easier to stir and control. So if you decide to learn how to weld metal, start with a welding inverter.
Welding technology
For an electric arc to occur, two conductive elements with opposite charges are required. One is a metal part, and the second is an electrode.
The electrodes used for manual arc welding consist of a metal core coated with a special protective compound. There are also graphite and carbon non-metallic welding electrodes, but they are used for special work and are unlikely to be useful to a novice welder.
When an electrode and metal of opposite polarity touch, an electric arc occurs. After its appearance, in the place where it is directed, the metal of the part begins to melt. At the same time, the metal of the electrode rod melts, being transferred with the electric arc to the melting zone: the weld pool.
How a weld pool is formed. Without understanding this process, you will not understand how to weld metal correctly (To enlarge the size of the picture, right-click on it)
During the process, the protective coating also burns, partially melting, partially evaporating and releasing a certain amount of hot gases. Gases surround the weld pool, protecting the metal from interaction with oxygen. Their composition depends on the type of protective coating. The molten slag also coats the metal, also helping to maintain its temperature. To weld properly, you must ensure that the slag covers the weld pool.
The weld is formed by moving the bath. And it moves when the electrode moves. This is the whole secret of welding: you need to move the electrode at a certain speed. It is also important, depending on the required type of connection, to correctly select its angle of inclination and current parameters.
As the metal cools, a slag crust forms on it - the result of the combustion of protective gases. It also protects the metal from contact with oxygen in the air. After cooling, it is beaten with a hammer. In this case, hot fragments fly away, so eye protection is required (wear special glasses).
How to weld metal correctly
Learning to hold the electrode correctly and move the bath is not enough for a good result. It is necessary to know some of the subtleties of the behavior of the metals being joined. The peculiarity is that the seam “pulls” the parts, which can cause them to warp. As a result, the shape of the product may differ greatly from what was intended.
Electric welding technology: before starting to apply a seam, the parts are connected using tack welds - short seams located at a distance of 80-250 mm from each other
Therefore, before work, parts are secured with clamps, ties and other devices. In addition, tacks are made - short transverse seams laid every few tens of centimeters. They hold the parts together, giving the product its shape. When welding joints, they are applied on both sides: this way the resulting stresses are compensated. Only after these preparatory measures do welding begin.
How to choose a current for welding
It is impossible to learn how to weld using electric welding if you do not know what current to set. It depends on the thickness of the parts being welded and the electrodes used. Their dependence is presented in the table.
But with manual arc welding, everything is interconnected. For example, the voltage in the network has dropped. The inverter simply cannot produce the required current. But even under these conditions you can work: you can move the electrode more slowly, achieving good heating. If this does not help, change the type of movement of the electrode - passing over one place several times. Another way is to use a thinner electrode. By combining all these methods you can achieve a good weld even in such conditions.
Now you know how to weld properly. All that remains is to practice the skills. Choose a welding machine, buy electrodes and a welding helmet and start practicing.
To reinforce the information, watch the video lesson on welding.
Among the search queries, the same question very often appears - “how to cook with inverter welding?” It is not difficult to understand the intricacies of working with a welding inverter; operating instructions for this device are available even to novice welders.
Thanks to the advent of welding inverters, the welding process has become much easier for both professionals in this matter and beginners. These devices made it possible to make the transition to higher quality and faster welding of metal structures. At the moment, the technology of metal welding with an inverter has managed to spread so much that it has already managed to relegate welding work using classic transformers, rectifiers and generators to the background.
How does a welding inverter work?
The inverter welding machine operates on alternating current. Its frequency must be 50 hertz. Alternating current enters the inverter from the consumer network and is supplied to the rectifier.
The resulting electric current is converted inside the inverter. This occurs due to the operation of special transistors. They increase the frequency of current switching, which is then used for welding. After conversion, its frequency level reaches 20-50 kilohertz.
The increased frequency of the electric current is the main technical feature of the welding inverter. It allows you to achieve high productivity in the operation of the device and reduce the time spent on welding metals. This feature gives the inverter an advantage when compared to other types of welding machines.
After converting the frequency of the current in the device, its voltage is changed. It decreases until it reaches levels between 70-90 volts. At the same time, the current rises to 100-200 amperes. Despite the high power of generated current, the dimensions of the inverter are small. This is achieved due to the fact that there are no bulky induction coils in its design.
Welding thin metal with an inverter: a guide for beginners
The first recommendation for beginners in welding thin metal with an inverter is the correct polarity setting. It switches on the device itself. This parameter determines the direction of electron movement and depends on the connection of the cables to the hardware connectors.
When welding thin metal with an inverter, the polarity must be reversed. In this case, electrons will move from the metal structure to the electrodes. With reverse polarity, the electrode elements will heat up significantly more. Thanks to this, the risk of burning through the metal is significantly reduced.
There are also three more tips for beginners in inverter metal welding.
TIP 1: watch several videos on how to properly perform inverter metal welding. They contain useful tips from welding professionals. The videos will also help you see the correct welding technology.
TIP 2: Learn proper ignition technique. There are two ways to light an arc in a welding machine - by tapping or striking the metal being processed.
TIP 3: Learn how to properly hold the welding machine. It is best to hold the inverter above the metal being welded at an angle of 90 degrees. In this case, the welding seam will be of better quality.
How to properly weld thin metal using inverter welding
The technique of welding thin metal with an inverter involves careful selection of operating parameters and individual components of the welding device. First of all, it is necessary to establish the current generated by the device. The thicker the structure being processed, the stronger the electric current should be.
Next, select electrodes suitable for welding. Their diameter should be the same as that of the structures being welded. For example, if welding needs to be carried out on a sheet of metal 2 millimeters thick, then the same parameter for the electrodes should be identical. In this case, the current should be set within 35 amperes.
Before welding thin metal using inverter welding, you need to check the operation of the welding machine on any unnecessary part. It is recommended to ensure that the metal does not burn through and leaves a smooth seam. If the welding goes well, this means that the current strength and thickness of the electrodes were selected correctly.
After checking, you can begin welding thin metal. The inverter must be moved intermittently. This will help create a denser seam that will reliably withstand external mechanical stress and possible deformations.
Welding thick and thin metal structures with an inverter
The main problem when welding thin metal to thick metal with an inverter is that parts of different thicknesses require different polarities when welding. If thinner parts are welded with reverse polarity set, then other parameters are required with products thicker than 3 millimeters.
The thing is that thick metals must be welded at high temperatures. Otherwise, the parts will not warm up to the required level and the welding seam will not be of sufficient quality. Direct polarization helps solve the heating problem. It directs electrons from the electrode to the metal, which helps heat it to an acceptable temperature. This makes thick metals ready for welding.
For this reason, before welding structures of different thicknesses, it is recommended to warm up thicker parts. This will allow them to be processed efficiently and tightly welded to thin metals. For welding metal products of different thicknesses, it is best to set the inverter to reverse polarity. The current strength should fluctuate between 30-50 amperes.
How to cut metal parts using inverter welding?
Using inverter welding, you can cut metal of any thickness. To do this, it is necessary to increase the current generated by the device. For high-quality cutting of metal products, an electric current is suitable, whose power rating will be 140-160 amperes. It is also necessary to correctly set the polarization of the device. When cutting metal, you will need to activate the straight polarity of the inverter.
The technique of inverter cutting of metal parts is that the electrode is pressed into the surface being processed until it forms a through hole in it. After it appears, the inverter moves, and the process of creating new gaps proceeds in the same way. It is recommended to warm up the metal before cutting. It is better to cut it in a vertical position - this way drops of molten material will flow onto the work surface.
Pros and cons of using an inverter
In conclusion to all of the above, it is necessary to note the advantages and disadvantages of a welding inverter. The main positive aspect of using this device is its light weight. This helps to significantly increase welding productivity.
The other most important advantage of an inverter is the ability to widely adjust the welding current. This allows the use of argon as an inert gas and non-consumable electrodes for welding. Inverters also have the option of stopping the current supply if a short circuit occurs.
The most significant disadvantage of inverters is their high cost. These devices cost two to three times more than conventional welding machines. However, they do not have more serious protection against dust and dirt particles.
Very often, novice welders wonder how to weld metal using inverter welding at sub-zero temperatures. Alas, this method of welding is not suitable for use in cold weather. Often, metal processing with an inverter is carried out at a temperature of at least 15 degrees Celsius. In extreme cold, the device will not be able to provide high-quality welding.
Despite these disadvantages, the inverter can be called a reliable and high-performance device. The welding work carried out by him gives high-quality and durable results. For this reason, inverter welding is suitable for high-quality processing of metal structures. Despite this, beginners are still advised to familiarize themselves in advance with how to weld metal using inverter welding.
