Three factors affecting the efficiency of spot welding machine

06 Sep 2022

Welding current Since the heat generated by the resistance is proportional to the square of the passing current, the welding current is an important factor in generating heat. Butt welding machine. The importance of welding current does not simply refer to the size of welding current, but also the level of current density. ※Nugget: refers to the metal part that solidifies after melting at the joint during lap resistance welding. pressure The pressure in the welding process of the spot welder is an important factor in the heat generation. Pressurizing force is the mechanical force applied to the welding place. The contact resistance is reduced by the pressurizing force, and the resistance value is made uniform, which can prevent local heating during welding and make the welding effect uniform. Power-on time The power-on time is also an important factor in generating heat. The heat generated by power-on is released by conduction. Even if the total heat is constant, due to the different p...

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The main component of the butt welder is a step-down transformer

01 Sep 2022

The main component of the butt welding machine is a step-down transformer, and the two ends of the secondary coil are the workpiece to be welded and the electrode. When working, the arc is ignited, and the electrode is fused into 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 characteristics of a sharp drop in voltage, that is, the voltage drops after the electrode is ignited; when the electrode is stuck and short-circuited, the voltage drops sharply. Next, the editor will introduce the principle of butt welding machine and the advantages of butt welding machine. Butt welding machine principle What the butt welding machine uses is that the resistance will generate heat when the workpiece is in contact with each other, so as to achieve the purpose of heating the workpiece and make the metal surface melt, and the weld is formed under the condition of plastic deformation of the solid pha...

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Astigmatism butt welding machine should pay attention to what

22 Aug 2022

1. Before using the flash butt welding machine, check whether the rated voltage of the winding and the power supply voltage are consistent (380V or 220V), and check whether the wiring of the terminal board is correct. If the flash butt welding machine is put into use for the first time or has been used for a long time, a 500V megohmmeter should be used to measure the mutual between the winding and the insulation resistance on the magnetic core should not be less than 0.5MΩ. 2. The flash welder is on the side, the terminal board nut, copper wire and wire on the secondary side must be in close contact and reliable. If the contact is not good, burn the bolt, nut and joint into a ring. Therefore, after the welding machine runs for a period of time, wipe the oxide layer on the surface with a fine emery cloth, and then tighten it. 3. The flash butt welding machine should avoid long-term short circuit of welding electrodes and welding parts to prevent burning the burner. 4. The workplace of t...

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What are the main advantages of a butt welding machine

18 Aug 2022

1. Energy saving. Radiator flash welding machine for two 125KVA resistance welding transformers for power, pneumatic compression, upsetting, no hydraulic station. Compared to other welding machines that use two 315KVA single-phase AC welding transformers and two 18KVA hydraulic station welders, the UN-250AB welder can save up to 78℅. 2. Low power grid requirements. It can only meet the grid of 250KVA. 3. High welding precision. Using programmable controller PLC and imported stepping motor to control the flashing process, the burning and burning speed can be set accurately; welding current is controlled by microcomputer welding controller. It can be controlled within ±0.2mm, which is convenient for subsequent welding parts. 4. Automatic centering function. Make sure that the two ends of the pipe are the same between the two ends to ensure the same amount of combustion at both ends. 5. High welding efficiency. With the time of workpiece pressure and force cylinder, the reaction speed is ...

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Principles of use of butt welding machine

09 Aug 2022

1. Butt welding process According to the working principle of the butt welding machine, the butt welding process can be divided into two types: resistance butt welding and flash butt welding: Resistance welding is done to cut the ends of the steel bars to the plastic state, then cut off the power, then heat to the plastic connections. This welding process is easy to produce oxidation and cinder joint site, and the required part of the steel bar should be smooth and smooth, and the energy consumption during welding is very high, so the welding machine has a high power, so it is rarely used. Flash butt welding is a process in which molten metal particles during welding create sparks (flashes) during welding. While the molten metal is blown out, the oxides and slag can be brought out, making the welded joints of good quality and widely used, especially in the connection between mild steel and low alloy steel. 2. The following matters should be noted: Adjust the distance between the jaws. ...

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Safe operation of butt welder

04 Aug 2022

Butt welders are also known as current welders or resistance butt welders. Using the resistance between the contact surfaces of the two workpieces, a low voltage and a large current is instantaneously passed through, so that the contact surfaces of the two butt-jointed metals are instantly heated to melt and fuse. Also known as a current welder or a resistance welder. Using the electrical resistance between the two parts, the contact surfaces of the two connecting metals are instantly heated to melt and fuse. The purpose of welding two pieces of metal together. (1) The lower half of the table and the cutter should be kept horizontally. The length of the table can be determined according to the length of the processed material. When machining longer bars, special people should be there to help and follow the operator's orders, not random pushes. (2) Before starting, it is necessary to check whether the cutter should be free of cracks, the bolts should be fixed, and the protective cover ...

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