FAQ

Resistance welding is a welding method in which the workpiece to be welded is pressed between two electrodes, and the current is used to generate heat on the contact surface of the workpiece and the resistance in the adjacent area, and heat it to a molten or plastic state to form a metal bond. . With its unique advantages, resistance welding is widely used in aerospace, electronics, automobiles, household appliances and other manufacturing industries. There are four main resistance welding methods: spot welding, seam welding, projection welding, and butt welding.

Resistance welding is suitable for mass production, with high production efficiency and no noise and harmful gases; simple operation, easy to realize mechanization and automation; low welding cost, no welding materials such as filler metal; small stress and deformation, short heating time, and concentrated heat; The metallurgical process is simple. When the nugget is formed, it is always surrounded by a plastic ring, and the molten metal is isolated from the air.

The core of resistance welding are the three major elements of welding current, pressure, and energizing time, all of which are indispensable. Model selection according to the material and thickness of the workpiece.

Welding current is an important factor in generating heat. The formula is Q=I²Rt. It can be seen that the influence of current on heat generation is greater than both the resistance R and the time t. Therefore, the proper and stable welding current must be ensured during welding. If the welding current is too small, the welding part will not have enough heat, which will seriously affect the welding strength. If the welding current is too large, the welding part will be deformed, the surface will become dirty, the molten metal will splash, and bubbles will be generated.

Function of Butt Welding Machine Inspection System

News & Technicals Function of Butt Welding Machine Inspection System The main functions of the welding machine inspection system are: acquisition function, dynamic curve display, analysis function, important parameter display, parameter report, dynamic connection, welding quality judgment. Collection function: It can collect the main parameters of the welding process at the same time, such as primary voltage, primary current, flash voltage, displacement, pressure and other important welding parameters; Dynamic curve display: The collected main welding parameters are calculated and analyzed to obtain the dynamic curve of the effective value of the main welding parameters during the welding process, including: primary voltage, welding current, flash voltage, displacement, speed, acceleration and pressure, etc. Important welding parameter curve; Analysis function: It can analyze the main curve in the welding process, can display the real-time value, average value, maximum value, variance value of any curve, etc., can zoom in or zoom out the analysis…
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Application and Characteristics of Copper and Aluminum Butt Welding Machine

News & Technicals Application and Characteristics of Copper and Aluminum Butt Welding Machine The copper wire butt welding machine uses the two ends of the electrode to press the two ports of the butt-welded parts respectively. After the power is turned on, the upsetting cylinder will gradually advance the two broken ports at a set speed. The current density of the first contact part of the port in the process of approaching Very large, it will instantly liquefy to form metal lintels and blasting to produce metal splashes, that is, flashing; as the ports gradually approach, the number of connection points gradually increases, and finally the entire end surface is formed with countless liquid metal lintels, which are continuously blasted to make the end surface After being heated to the critical point of plasticity and liquidity, a large upsetting force is applied to the two ends immediately and the pressure…
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Quality Analysis of Welding Steel Bar by Butt Welder

News & Technicals Quality Analysis of Welding Steel Bar by Butt Welder To use a butt welder to weld steel bars, the main attention should be paid to the steel grade, diameter, welding machine capacity and different process methods, and the appropriate transformer grade is selected. If the transformer level is too low, the secondary voltage is also low, and the welding current is small, it will be difficult to flash, insufficient heating, and it is impossible to use flash to protect the welding joint from oxidation; on the contrary, if the transformer level is too high, the flash will be too strong, It will also cause a large amount of heat to be taken away by the metal particles, and the temperature at the end of the steel bar will not rise. Insufficient welding strength of steel bars If it is confirmed that there is no problem with the…
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What are the Features of the Power Supply Device in the Spot Welder?

News & Technicals What are the Features of the Power Supply Device in the Spot Welder? The power supply device is also called the power circuit, which is usually composed of resistance welding transformer, power adjustment mechanism, (stage number converter), main power switch, welding circuit, etc., but it is used in capacitor energy storage welding machine, DC shock wave welding machine and three-phase welding machine. The main circuit of the low-frequency welding machine also includes a primary rectifier device and a polarity switch, etc., an inverter welding machine also includes a primary rectifier device, an inverter and a secondary rectifier component, etc., and a secondary rectifier welding machine also includes two Sub-rectifier components, etc. 1. It can output high current, low voltage, and the output welding current is usually 1-100KA. The output no-load voltage of the fixed welding machine is usually within 12V, and the mobile welding machine is within…
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How to Adjust the Nugget Offset of Resistance Spot Welding Machine?

News & Technicals How to Adjust the Nugget Offset of Resistance Spot Welding Machine? The principle of the resistance spot welding machine to adjust the nugget offset is to increase the heat generation of the thin plate or the workpiece with good electrical and thermal conductivity to reduce its heat dissipation. Commonly used methods are:   Adopt strong conditions: increase the influence of contact resistance between workpieces and reduce the influence of electrode heat dissipation. It is obvious that the spot welding machine can weld workpieces with a large thickness ratio by using a large current and a short energizing time. Electrodes with different contact surface diameters should be smaller in diameter on the side of a thin piece or a workpiece with good electrical conductivity and thermal conductivity to increase the current density on this side and reduce the effect of electrode heat dissipation.   Use different electrode materials:…
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