The main welding method of pressure welding of lithium battery spot welding machine

 The liquidation preparation of the lithium battery spot welder before welding is essential. The center of the upper and lower two electrodes often presents foreign bodies, such as oil stains, etc., which requires us to often liquidate, because it is easy to make the spot welding mechanism into a shortcoming.

The reckoning is easy, but we have to do it for the long haul. Spot welding machine power inspection is also what we must do in the use of spot welding machine, which is an important link in the operation of the spot welding machine, sometimes electrical equipment may have the phenomenon of exposure, of course, our gas system may also have leakage phenomenon, so we must check before use, so as to ensure the safety of our consumption.

Resistance welding is a welding method in which the welding parts are combined, the lithium battery intelligent spot welding machine applies pressure through the electrode, and the resistance heat generated by the current passes through the contact surface of the joint and the adjacent area.

The main characteristics of resistance welding are: the welding voltage is very low (1 ~ 12V), the welding current is very large (tens to thousands of amps), and the welding time to complete a joint is very short (0.01 ~ a few seconds), so the consumption rate is high. When heating, mechanical pressure is applied to the joint, and the joint is welded under the action of pressure, and there is no need to fill metal during welding.

The application of resistance welding is very common, especially in the automotive and aircraft manufacturing industry, such as the new passenger aircraft with up to millions of solder joints. Resistance welding has applications in spacecraft, semiconductor devices and integrated circuit components. Therefore, resistance welding is one of the important methods of welding. Resistance welding is divided into spot welding, seam welding and butt welding according to different process methods, and only spot welding is introduced here.

1, the lithium battery intelligent spot welding machine is the welding part assembly joint, and pressed between the two electrodes, the application of resistance heat condensation base metal, forming the resistance welding method of welding joints. Spot welding is mostly used for the connection of thin sheets, such as aircraft skin, aviation engine smoke pipe, car cab shell.

2, the main parts of the spot welding machine include frame, welding transformer, electrode and electrode arm, pressure mechanism and cooling water. Welding transformer is a spot welding appliance, and its secondary needs only one loop. The upper and lower electrodes and electrode arms are used for conducting welding current and transmitting power. Cooling water through the transformer, electrode and other parts to avoid heat welding. The cooling water should be passed first, and then the power switch should be switched on. The quality of electrode directly affects the welding process, welding quality and consumption rate. Electrode materials are commonly made of copper, cadmium bronze, chromium bronze, etc. The shape of the electrode is varied, mainly according to the shape of the weldment. When installing electrodes, pay attention to the parallel surface of the upper and lower electrodes. The electrode plane should be kept clean, and often trimmed with emery cloth or file.

Spot welding machine process

The process of spot welding is:

1. Open cooling water;

2. After the surface of the weldment is cleared and assembled accurately, it is sent between the upper and lower electrodes, and pressure is applied to make it in good contact;

3, power to heat the contact surface of the two workpieces, local condensation, constituting a melting core;

4. Adhere to the pressure after power failure, so that the molten core is cooled and solidified under pressure to form a solder joint;

5. Remove the pressure and take the finished parts.

6, welding current, electrode pressure, power time and electrode working surface size and other spot welding process parameters have a serious impact on welding quality.