Cold welding call those methods of connecting parts that do not need heating. It is worth understanding that such a type of connection is used only in cases where the classic welding cannot be applied. For reasons, too large dimensions of the combined parts can be attributed, or the presence of internal stresses. Often cold welding, as well as classical, is used to connect metal objects. In both cases, there is a need to apply special equipment. With cold welding there is a mutual deformation of the surfaces that must be cleaned before the connection.

Features of cold welding

It should be noted that during cold welding a high-strength compound is created, which is not inferior in quality to many other methods of connecting parts. Specialists actively use cold welding for cadmium, zinc, silver, iron, aluminum, copper, lead and nickel. An important advantage of cold welding is the combination of heterogeneous metals.

Welded in this way the details of the Vansel. At this time, there is an indulgence in the metal punches from different sides. The compound zones may not only be in the form of seams, but also in the form of points. The zones of compression contribute to the decrease in the oscillations of the welded parts. Also, this method of welding can be combined with small plastic materials.

There are also disadvantages of cold welding. Quite often, when connecting parts, additional pressure are created that occur on small surface areas.

Welding roller

Roller welding is one of the most popular methods of cold connecting parts. It is used in various industries, but the most important thing you need to know about this method of welding is about its reliability. It is really universal cold welding, which creates a monolithic connection.

The principle of its work is that two parts are located under the roller and carefully pressed against the surface. Next, the rotation of the rollers begins, which promotes the cutting of working protrusions of parts. Thus, there is a slow movement of welding items. In the end, it is possible to observe the monolithic seam, which is much stronger than the seam of classical welding.

Obviously, there are also negative sides in this welding method. First of all, this is a free register of the metal throughout the seam line. In any case, you can choose a more massive roller, which will solve this problem. Often this type of welding use directly on metal-cutting machines, which is very convenient.

The question of the rationality of roller welding is very acute. Some specialists do not advise it to use in a single production. However, definitely there is a benefit of using the roller connection of parts with a mass type of output.

Use glue paste

The method of cold welding, which lies in the use of glue paste, is especially popular, many know about him and actively apply. Every year a variety of assortment of such products is growing, and the price falls that it cannot but rejoice. At the same time, it is necessary to know in detail the technology of using glue paste, otherwise there is a possibility to face troubles.

Use glue-paste in cases where there is an aggressive medium that can damage the standard welding compound. Often, in such a way, gas tanks, batteries, silencers and other vehicle spare parts are repaired. Often glue paste is suitable for repairing aquariums, furniture, as well as water supply pipes. Accordingly, in all listed cases, it is almost impossible to apply classical welding, and it would be quite ineffective.

It is also important to note that such a type of welding will help to combine small parts with each other, which are not at all suitable for the classical method. Moreover, the adhesive paste will help create a minimum seam that can be almost imperceptible. Cold Mastix welding is extremely popular among existing means for connecting parts. This type of glue paste is able to restore any fragments of metal products that operate at temperatures from -60 ºС to +150 ºС. Such possibilities are quite impressive, but there are also disadvantages. First of all, it is worth noting that the adhesive paste is not intended to connect massive items. As already mentioned, it is desirable to apply such a type of cold welding to restore small fragments of parts. In other cases, only classic welding may be effective.

The main features of using cold welding

1. Before starting the process of cold welding, we will need to carefully clean the surface of the part from rust. To do this, it is recommended to use emery paper. If possible, you can handle the surface of the parts with acetone (for degreasing), and then dry.
2. We take the necessary volume of glue paste and mix your fingers to a homogeneous state.
3. Now we need to apply a mixture on the item that we need to repair. In order for the paste "grabbed", you need to press and fix the recoverable parts zone for 40 minutes. Sometimes apply a mixture to the surface is recommended by reciprocating movements that will help ensure excellent adhesion of the composition. If the surface of the part is grilled, the connection strength is significantly reduced. For the formation and smoothing of the surface, the flat object is best suited. Often this kind of tools are complete with glue paste.
4. You can form a mixture for 20 minutes. After another 20 minutes, the composition "grab". Already after 1.5-2 hours, the repaired item can be used in work, without limiting it in the loads.

Security use

It is important to note that the components of glue paste negatively affect human health. If you get a mixture on the skin or eye, you must urgently consult a doctor who will conduct all the necessary events to prevent negative processes. It is advised to use rubber gloves and glasses that will help to avoid all troubles. It should be especially serious about working with cold welding near the locations where food is located. So any action with glue paste is desirable to spend on special workplaces.