Now, probably, anyone has a cottage or a house in the country. Because the inverter in the household is indispensable. Often there is a need to cook a thin metal. But not everyone skillfully cooks thin metal with a semiautomatic device, since the process has its own characteristics. We will talk about them further.
The scheme of welding thin metal.
Features of invertor welding of thin metals
Inverter for welding is now increasingly in demand and has its fans, because it is awarded some of the advantages. Timely purchased semiautomatic will come to the rescue in any situation: thanks to it, it is possible to repair the fence, gate or manufacture various designs from metal. The inverter is on sale in any shop where welding machines are presented. A home master who has no experience with similar equipment should know how to use it correctly or how to boil the metal with an inverter or a semi-automatic machine that differs from others in that it contains an electrical unit. Due to his weight is significantly lower, and the workflow is much more efficient.
The design of the welding inverter.
Semiautomatic has another distinctive feature in that it can perfectly manifest itself at low voltage. That is a very valuable quality for those who work on the device in a private house in the country. Most importantly, when you need something to cook, do not forget about the requirements of personal safety.
You should certainly wear a tight suit and gloves made of thick material that protects from burning by dripping metal. A prerequisite is the use of a mask for welders or a protective shield, since there is a risk of damage to the eyes by ultraviolet radiation. In most cases, household units for welding metal are very weak, so it is recommended to select electrodes up to 2.5 mm. Thinner electrodes can be. But if you take them thicker, it is unlikely that they will at least somehow work.
Of course, it is much easier to cook with an inverter than an ordinary unit. Even an operation such as setting a current can be carried out with a single movement on the handle that turns on the current. The range of its power is 20-100 A. The power of the current is selected, focusing on the features of the upcoming work and the parameters of the electrodes.
It is quite clear that the thinner the welding electrode and the sheet of metal that is planned to be welded, the current value should be set lower and, conversely, the thicker the welding electrode and metal, the higher the current value.Back to table of contents
Methods of welding thin metal semi-automatic
How to connect the inverter thin metal? For this purpose, various methods are used: butt and overlap, by means of a non-removable gasket and without it.Back to table of contents
Weld thin metal overlap
The scheme of welding thin metal using inverter welding.
First of all, the sheets are stacked on top of each other. Then tightly connect the edges of the upper and lower sheet together by the imposition of goods. Gaps between the metal should not be. Then set up such a parameter as the value of the welding current. Steel sheet with a thickness of 1 mm corresponds to sizes in the range between 30 and 50 A. If the thickness of the sheets has deviations from that indicated here, then the current is either reduced or increased.
The next point is sticking metal sheets to each other. It is performed with short suture bridges over the entire area of the joint. Weld intermittently, taking the electrode and, without hesitation, applying (what is called "extinguish the arc"), and the material should not have time to cool. After that, the sheets are completely butt-welded in intermittent steps. The electrode is sometimes placed in a cold area of the joint, which will allow the material not to warp much.Back to table of contents
Lined welded joint
It is important to take into account the fact that with a shorter continuous seam the metal warps less. Then they try to ensure that the gap between the ends of the steel is the most minimal. Better, of course, if it is not. For the welding of thin metal lining is required, laid under the joint. Without it, it is almost impossible to butt weld thin steel.
The scheme of welding thin metal butt.
The technology is similar to the method of overlapping: set the value of the current using clamps, and perform the connection in intermittent steps. Such an option as the involvement of a steel non-retractable lining can be used. In this case, a steel strip is placed in the intersectional joint at a thickness equal to this parameter at the sheet.
It is important to check that the fit of this strip to the sheet is as dense as possible. Then the lining will be welded to the blanks, even if there is a small gap between them. There are situations when laying a non-retractable strip cannot be done. Then a thick copper strip is placed under the joint to prevent burning of the sheets due to heat dissipation. Such a strip after the welding process is pulled out. When welding of two horizontally aligned pipes is required, then work starts from the bottom. And the welding procedure will proceed from bottom to top. Lifting up perform smoothly and gradually, slowly. Otherwise, the suture will be fragile or the tube will burn.
In the process of work should pay attention to the quality of the weld and metal melting. When the metal burns, therefore, the welding current is exceeded. Then it is simply reduced. In case of poor penetration of the joint there is a probability that the voltage is low and must be added. Inverter devices for welding parts allow you to smoothly change the amount of current when working on them.
It is for this reason that they are noted for their convenience and ease of handling.
When welding, you should observe the utmost accuracy and fulfill all the requirements, then what kind of uncertainty about working on such a device can be discussed. And even an inexperienced person who hadn’t held anything like that in his hands could master the process. Successful mastering of the welding process!