Coal electrodes are used for welding, as well as metal cutting (according to GOST 10720-75). They consist of electrical coal and are produced in the form of rods of round and flat section of various diameters. They are used mainly for cutting, firming holes in low alloy steels at metallurgical enterprises, in foundry, as well as in engineering. They can be safely used to welding thin sheet metal, air-pound cutting, air-plastic cutting with carbon electrodes and brewing defects with metal casting.
Welding with this electrode is performed with current strength up to 580A. Obvious advantages of the coal electrode above other cutting methods, for example, oxygen canvas, are the comfort and simplicity of the method. Compressed air in combination with electric current allows you to cut on the surface of the metal, processing of the edges for welding. At the same time, the maximum of the removal of the metal. This means that their wear is below other representatives of the electrodes.
Types of omeded coal electrodes.
1) Round. Usually have a volume spectrum of application. Produced both minimal diameters, starting from 3.2 mm to 19.0 mm (the most popular: 3.2, 4.0, 6.5, 9.0, 9.5, 16.0, 19.0 mm).
2) endless. Allow you to complete the work practically without expenses (from where the name is). However, only round cross section is produced with a diameter, as a rule, 8-25 mm.
3) semicircular. On the one hand they have round, and on the other flat shape. In connection with which the largest range of application differs with the largest. Universal. The most common sizes of semicircular coal electrodes: 13×6.5×355 mm, 10x5x355 mm, 19×9.5×355 mm.
4) hollow. Used for the formation of string (grooves “u” form). Made with diameters from 5 mm to 13 mm. However, in the Russian market they are represented in a small spectrum.