Electric welding machine is a welding tool that is often seen in steel, construction and other industries. Its use greatly improves the efficiency of construction operations. Electric welding machines can be divided into AC and DC electric welding machines according to the output power, and their performance and price are different. So, which welding machine is better? Which is better, DC welding machine or AC welding machine? Let me compare their pros and cons below, let’s take a look at which welding machine is good.
DC Welding Machine
Advantages and Disadvantages: Compared with the AC welding machine of the same specification, its volume is small and it is more economical Electric energy; it can also be used for acid and alkaline electrodes, the finished items are beautiful, and the spatter is low; the current adjustment is very convenient, and the impact on the power grid is small. But the fly in the ointment is that its process performance is poor, the price is high, and the durability is poor. Application: The DC welding machine is mainly used in the welding of pressure vessel boilers, pipes, or welding of important structural manufacturing units. AC Welder
AC Welder is a special step-down transformer that converts 220V and 380V AC into low-voltage DC, that is, the type of output power is AC power. Welder.
The arc is stable, it is not easy to break the arc, the droplet transition is stable, and the arc is easy to strike, but the electronic parts are easy to age, and it is easy to be biased, especially for high-current welding.
Applicable electrodes: Acid, alkaline, stainless steel electrodes are suitable.
AC welding machinePerformance: It is not easy to arc, the general circuit is simple, the machine failure rate is relatively low, and the structure is simple and easy to maintain. However, the transformer consumes a lot of energy and easily affects the balance of the power grid.
In the case of low welding current, the DC arc has a good wetting effect on the molten weld metal and can regulate the size of the weld bead, so it is very suitable for welding thin parts. DC power is more suitable for overhead and vertical welding than AC power because the DC arc is shorter. But sometimes the arc blowing of the DC power supply is a prominent problem, and the solution is to convert it into an AC power supply. In manual arc welding, the AC welding machine and some additional devices are cheap and can avoid the harmful effects of the arc blowing force as much as possible.
Electric welding machine purchase strategy 1. When purchasing electric welding machine products, it is necessary to go to regular production enterprises or large shopping malls to buy, and to buy with a high market share brand famous products. Don’t be greedy for cheap purchases in small stores, where the quality of welding machines cannot be guaranteed.
2. Before purchasing, check the operation, conversion and installation of the switches on the panel, whether the power indicator light is on and off, whether the fan is normal, whether there is abnormal vibration and beeping in the power supply, and whether there is any peculiar smell , Whether there is any heating phenomenon such as discoloration on the appearance, in order to ensure the quality of the electric welding machine and give full play to the performance of the electric welding machine. 3. When purchasing, you can ask the dealer to provide the product quality inspection report or certificate of conformity. Because the electric welding machine product is a national compulsory certification product, it is necessary to confirm whether the product has passed the “3C” certification when purchasing. You can also check online. 4. When purchasing, be sure to check whether the product has grounding screws. The connection of the grounding screw should be free of paint and well grounded. Whether the movement is clean and the insulation is damaged to ensure the safety of use, it can also be checked if necessary. 6.
