DC welding
Are you interested in welding DC metals from the supplier company AvecGlob? Here you will find interesting information on this topic /
The essence of the method
DC welding is used for most welding applications with piece electrodes. Special advantages are ensured in the welding of steel, including smoother and more stable arcs, easier starts, fewer arc outages, fewer splashes and easier vertical and upper welding.
The positive polarity of the direct current provides a high level of penetration into the steel. The negative polarity of the direct current leads to less penetration, however, with a higher deposition rate. It is sometimes used, for example, on thin sheet metal to prevent burns.
There are some specific technical problems associated with the use of direct current polarity, the main one of which arises when the arc is ignited. When welding this arc has a certain shape of the torch, and the welder needs to accurately direct this arc to the site of the future welded joint. A short circuit can be caused by magnetic phenomena in the material to be welded, the value of the operating current or even a strong wind.
Supplier — AvekGlob Company — offers at a reasonable price from the manufacturer various welded structures, metals and alloys, in the quantity and assortment required by the customer. The supplier guarantees the timely delivery of products to any address specified by the consumer.
Features of DC welding
DC welding is used for small distances between the source and the electrode, as this reduces the voltage drop across the cables. Although the welding cables are made of copper or aluminum, the resistance in the cables becomes larger as the length of the cable increases. In other words, the voltage reading between the electrode and the operation will be slightly lower than the indication at the output terminals of the power source.
Since DC current can work at lower welding currents, it is more suitable for welding overhead elements and vertical welding. When welding with direct current, the same magnetic fields are set in the entire welding assembly. In welds having different thicknesses and projections, these magnetic fields can affect the arc, causing it to deflect or oscillate in different directions. This condition is particularly difficult when corner welding.
When using a DC power supply, the question arises whether to use the positive polarity of the negative electrode. Some types of electrodes work with both direct and reverse polarity, while others — only from negative polarity of direct current. Direct current flows in one direction in the electrical circuit, and the direction of the current flow and the composition of the electrode material will have a certain effect on the welding arc and the weld.
Supplier — AvekGlob Company — offers to purchase various metals, alloys, welded structures in any quantity and range of sizes. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.