What is a Welder?

Welders are electrical appliances that provide power with certain characteristics for welding. Welding is widely used in various industrial fields, such as aerospace, ships, automobiles, containers, etc., because it is flexible, simple, convenient, reliable, and even has the same strength as the base metal after welding.

The main component of the electric welding machine is a step-down transformer. The two ends of the secondary coil are the workpiece and the electrode to be welded. When working, the arc is ignited. The electrode is welded in the gap of the workpiece at the high temperature of the arc. Because the iron core of the welding transformer has its own characteristics, it has the characteristic of a sharp voltage drop, that is, the voltage drops after the electrode is ignited; when the electrode is short-circuited by adhesion, the voltage even drops sharply.

During the welding operation, although the current in the circuit is the same everywhere, but because the resistance is not the same everywhere, the resistance is highest at the non-fixed contact (this resistance is called contact resistance), according to the law of thermal effect of current (also called

There is no authoritative classification method for the classification of welding machines. The following classification is mainly based on the industry use on the market:

(1) The main welding machines used by industrial and mining enterprises are: AC arc welding machines, DC welding machines, argon arc welding machines, carbon dioxide protection welding machines, butt welding machines, spot welding machines, submerged arc welding machines, high frequency welding machines, Flash butt welding machine, pressure welding machine, butt welding machine, laser welding machine, AC welding machine and DC welding machine

(2) There are two types of DC welding machines: one is to install rectifier components under the AC motor, and the other is a DC generator. DC welding machine mainly welds non-ferrous metals and pig iron. The AC welding machine mainly welds steel plates.

(3) TIG welding machine, carbon dioxide protection welding machine, high frequency welding machine, flash butt welding machine. The argon arc welding machine and carbon dioxide shielding welding machine can mainly weld thin plates and colored gold layers below 2MM. Flash butt welding machine mainly connects copper and aluminum joints and other objects, and high frequency welding machine mainly welds steel pipes in pipe manufacturers.

(4) Submerged arc welding mainly welds steel structural parts, bridge H steel, I-beam beams and other thick steel structural materials.

(5) Gas shielded welding: argon arc welding and carbon dioxide shielded welding. Welding under the protection of gas will not oxidize, solid welding, welding of non-ferrous metals, and welding of thin materials.

(6) Laser welding machine: can weld the leads inside the transistor.

(7) Butt welding machine: iron cables and other objects on the anchors of the cable factory. It can be docked with Yuan Steel.

(8) Multifunctional electric welding machine.

(9) Spot welding machine.

(10) Butt welding machine.

(11) Bolt welding machine.

(12) Carbon dioxide ammonia gas welding machine. ^[1]

Welding machine auxiliary equipment includes welding glasses to prevent the operator from being damaged by the welding arc or other welding energy from ultraviolet, infrared or other rays, masks to protect the eyes, face and neck of the welder during arc welding, white work clothes, welder gloves and protective Waiting.

1. Reasonable design and free adjustment. Different discharge frequencies can be selected according to different metal materials to achieve the best repair effect.

2. The heat affected area is small. There is no heat input during the instant of stacking, so there is no deformation, undercuts and residual stress. No local annealing occurs and no reheating is required after repair.

3, welding repair impact is very small. This welding machine overcomes the phenomenon that ordinary argon arc welding has impact on the periphery of the workpiece during the welding repair process. It is also possible to repair the machined surface of the workpiece without any margin.

4. High repair accuracy. The surfacing thickness is from a few micrometers to a few millimeters, just grinding and polishing.

5. High welding strength. Due to the full penetration of the material on the surface of the workpiece, a strong bonding force is generated.

6, using ring precision control. ^[2]

1. Why use energy storage for welding thin plates

First, when choosing electric welding machine products, go to a regular manufacturing company or a big shopping mall, and buy brand-name products with high market share. Don't try to buy it at a small store cheaply, where the quality of the welding machine cannot be guaranteed.

2. Before you buy, you can check the operation, conversion and installation of the switches on the panel, the power indicator light is on, whether the fan is normal, whether there is abnormal vibration and beep sound in the power supply, whether there is an unusual smell, and whether the appearance There are heating phenomena such as discoloration to ensure the quality of the welding machine and give full play to the performance of the welding machine.

Third, you can ask the dealer to provide a product quality inspection report or certificate of compliance when purchasing. Because the welding machine product is a national compulsory certification product, you must confirm whether the product has passed the "3C" certification when purchasing. You can also check online.

4. When purchasing, check whether the nameplate on the product has the manufacturer's name, production address, specifications, welding current adjustment range, load duration, and input voltage and current, etc., and then determine which one you want to buy according to your work needs. Welder.

Fifth, be sure to check whether the product has a ground screw when purchasing, the ground screw connection should be well grounded without paint. Whether the movement is clean and insulated to ensure that it is safe to use. It can also be checked if necessary.

6. If you want to buy a gas shielded welding machine, you should also check whether the accessories are complete, whether the wire feeder is oily, whether the rotation is smooth, and whether the connecting cable matches the external insulation and is damaged to ensure the stability of the arc. ^[4]