A brazing torch is a highly efficient tool that is mainly designed for brazing but also serves the purposes of welding and soldering. It can be helpful for DIY hobbyists that deal with metals as well. For fuel, the brazing torch uses hydrocarbons in gas form, e.g., propane and butane, etc.
There are numerous brazing torches available in the market for you to choose from depending on what you need them for. DIYs and other domestic tasks do not require a very high-intensity flame torch. Whereas, torches with high heating intensity are ideal for heavy-duty industrial jobs.
Torch Brazing And Its History
Brazing refers to a technique in which two metals are joined by a third melted metal. There are various methods of brazing that are still in practice but torch brazing is the most efficient of them all. Torch brazing dates back to 1989 when the oxy-acetylene cutting procedure was invented. Torch brazing was invented and explained by John Harris while he was working with synthetic rubies.
Like many other inventions, it was an accidental process that later became immensely popular for dealing with metals. Torch brazing has been said to have easily replaced the old methods and has revolutionized the metal industry.
The Different Types Of Brazing Torches
The market offers three different variants of a brazing torch: manual, automatic, and machine brazing torch. These three types of brazing torches are compatible with the aforementioned three methods of brazing respectively.
As the name suggests, the manual brazing torch requires man force and needs a handler. The start and stop features of the torch and the fuel regulations are controlled by the user.
In an automatic brazing torch, the user just has to fix the material in the machines and preset the controls. As a result, the machine would braze according to the preset settings. It is more useful in large-scale industrial works.
The mechanic brazing torch on the other hand is a blend of both the above-mentioned types of torches. The torch is so designed that the actual brazing process is controlled by the machine and the user only comes in to either fix the material or to jig the joint parts once an operation is complete.
How Does A Brazing Torch Work
The key working principle of a brazing torch is to melt the filler metal on-spot with a high-intensity flame. First of all, the filler metal is heated well above its melting temperature to turn it into a liquid.
Secondly, it is poured between the two joining parts by the capillary for highly accurate joining. Metals are first cleaned, brought closer to each other, and are made free from any kind of oxides.
Brazing is mostly used for joining metals that are too hard to be dealt with, such as the metals used in fire extinguishers. The filler is an alloy made of around 2 to 3 metals having a melting point slightly lower than that of the workpiece. This should explain why it does not melt the joining metals while flowing over them.
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