What are the requirements for welding power equipment for manual arc welding?

Manual arc welding, generally known as manual welding.

The old type has two types, DC and AC, for the application of acidic and inductive electrodes.

Power supply includes: BX series, ZX-5 series, ZX-7 series.

Now the ZX-7 series power supply is generally used.

The power supply requires a stable current output, and manual welding is a constant voltage source.

Then there is the selection of welding power supply according to your own welding process, and you must be clear about your welding process before choosing.

1) It has the external characteristics of steep drop;

The arc length is controlled by the hand during hand arc welding, because the jitter of the hand or the unevenness of the weldment surface makes the arc length change, the arc length fluctuates, and when the arc length changes, the current change caused by the steep drop external characteristic power supply is small, and the arc is more stable. Therefore, the basic requirement of hand arc welding for power supply is to have the external characteristics of steep drop.

2) It has good dynamic characteristics;

Manual arc welding requires good dynamic characteristics of the welding power source in order to obtain the expected regular droplet transition, stable arc, small spatter and good weld formation.

3) Have an appropriate no-load voltage; In the welding process, the higher no-load voltage is easy to trigger the arc, and due to the short circuit of the welding rod, it will lead to the welding arc extinguishing, and the higher no-load voltage can be separated from the short circuit in the welding process, so that the welding arc can be re-ignited as soon as possible, ensuring the stability of the whole welding process.

4) Have sufficient power and appropriate current regulation range to adapt to different welding requirements;

5) Easy to use and maintain.

<> common manual arc welding machines are AC arc welding machine and DC arc welding machine.

AC arc welding machine, also known as arc welding transformer, is a special transformer, which turns the alternating current of network voltage into low-voltage alternating current suitable for arc welding, which is composed of the main transformer and the required adjustment part and indication device.

The DC welding machine uses alternating current to be welded by converting the rectifier converter into direct current energy, which has the advantages of small size and light weight. Its structure is relatively complex, and maintenance is difficult.

Arc welding can be divided into manual arc welding, semi-automatic (arc) welding, and automatic (arc) welding. Automatic (arc) welding usually refers to automatic submerged arc welding - the welding part is covered with a protective flux layer, the light welding wire made of filler metal is inserted into the flux layer, and the welding metal produces an arc, the arc is buried under the flux layer, and the heat generated by the arc melts the welding wire, flux and base metal to form a weld, and the welding process is automated. The most commonly used is manual arc welding.

The equipment used in electric welding is the electric welding machine and some supporting accessories.

The welding machine selects different power welding machines according to the size of the welding workpiece, such as the small one such as the portable one of the 250 of Weiodin and the world's smallest electric welding machine, the medium-sized one has ZX7315, and the high-power one has ZX7630.

When entering the banquet and selling electric welding, the equipment and appliances to be used include welding machines, welding tongs, welding rods, connecting cables and auxiliary appliances.

1) Welding tongs Welding tongs are used to clamp welding rods, and their outer shells are made of high-temperature-resistant lightweight Yexianghui insulators. The welding tong must have good conductivity, and the external insulation is required to be good, and the high temperature is not heated for a long time, and there are two kinds of 300A and 500A commonly used.

2) The electrode and electrode are composed of two parts: the welding core and the coating.

3) The connecting cable is used to connect the weld material to conduct electricity, and the welding rod forms a welding circuit.

4) Accessories: 1) Welding helmet or sunglasses, work clothes, work shoes, leather gloves. A sharp hammer used to remove weld slag and fill the weld.

Butt joints, T-joints, corner joints, lap joints.

Common forms of welded joints are: butt joints, T-joints, corner joints, and lap joints, all of which can be welded by manual arc welding, but the welding quality varies.

The equipment used in electric welding is the electric welding machine and some supporting accessories.

According to the size of the welding workpiece, the electric welding machine is selected without slag and the same power welding machine, such as the small one in the world such as the portable one of the 250 of Weiodin, the medium-sized one has ZX7315, and the high-power one has the ZX7630.

When carrying out electric welding, the equipment and appliances to be used include welding machines, welding tongs, welding rods, connecting cables and auxiliary appliances.

1) Welding tongsWelding tongs are used to clamp welding rods, and their outer shells are made of high-temperature, lightweight insulators. Welding tongs must have good conductivity, and require good external insulation, and high temperature and high code period use without heat, such as 300A, 500A commonly used.

2) Electrode: The electrode is composed of two parts: the core and the coating.

3) The connecting cable is used to connect the weld material to conduct electricity, and the welding rod forms a welding circuit.

4) Accessories: 1) Welding helmet or sunglasses, work clothes, work shoes, leather gloves. A sharp hammer used to remove weld slag and fill the weld.