The wrong way to hurt the car and hurt people welding repair car stress a lot

“Electrowelding” is one of the most commonly used maintenance methods. It has a long history and is the most economical and convenient method for repairing welded steel parts. Prior to the era of truck control, repairing trucks using electric welding was simple. Basically, there was no need to do excessive protective measures; but since the era of electronic control, there have been more and more sophisticated electronic devices on trucks. Inadvertent welding of strong currents can easily destroy these expensive electronic devices.

● seemingly hidden risks

Although many cardmates now do some preventive measures before welding repairs, they often suffer from vehicle damage caused by electric welding, causing everyone to talk about “welding” and changing color, and that it is inevitable that electric welding damages electronic components. thing. In fact, this is not the case. The electrical failures caused by electric welding are mostly due to the fact that no protective measures have been properly taken or even wrong preventive measures have been taken. In order to let everyone avoid vehicle breakdown caused by welding, today I will talk to you about what problems need to be paid attention to during welding repairs.

First, I believe that most card-friends will choose to disconnect the vehicle's power supply or the battery's connection line at the beginning of the welding, which is believed to ensure that the precision electronic equipment can be protected from the strong current of welding. However, this is not the case. The battery is actually a filter element with very good performance. It can absorb the strong current from the welding to a certain extent and indirectly protect the electronic components.

Is that what we did when we took off battery cable welding? In fact, it is not absolute, as long as the disconnected positive and negative poles of the vehicle power cord are connected together to form a loop, it can really protect the electronic components when welding. Simply speaking, there are two options for welding, one without disconnecting the battery and the other with the positive and negative electrodes connected together after disconnection. To say which of the two methods is more reliable, I personally think that the second will be better.

Second, we need to connect the ground wire when welding repair is known to everyone, but the ground wire should be how to properly connect with most people but it is not clear, in fact, the connection ground seems simple, the actual is still very particular about. The principle to follow is that the closer to the welding site, the better. Connect the ground wire to the welded object as much as possible. The closer the resistance is to the welding site, the less likely the current will flow through other precision appliances.

For the semi-trailer, this problem should be paid more attention when welding. Because the semi-trailer is divided into two parts: the tractor and the trailer, if the tractor is welded but the ground wire is connected to the trailer, the strong current generated by the welding will instantly burn the spiral cable between the main hooks and burn the traction. The car's precision appliances can even cause fires. Therefore, when using electric welding, you must first determine the location of the ground connection to prevent additional losses.

Third, for the use of pneumatic braking of the vehicle, welding should pay special attention to do a good job of protective measures for the pressure line. Because the welding sparks once dropped on the internal pressure of the nylon pipeline, the pipeline will be broken instantly. If there is no way to be protected by conditions, the compressed air in all the air tanks of the vehicle should be released, which can reduce the chance of nylon tube breakage.

Fourth, in addition to the vehicle damage caused by electric welding, it actually has a great impact on people's health, because the strong light and ultraviolet rays generated by the arc will seriously burn our eyes and skin. So do not stay at the welding site unless it is necessary. If this is not possible, wear special protective eyes or close your eyes and wear long-sleeved trousers to prevent skin burns.

● Postscript

With the above preventive measures in place, you and your truck can basically minimize the risk of welding. Actually, it is not just electric welding. We may have other unforeseen and serious consequences because of negligence. Therefore, it is recommended that you strictly follow the operating procedures when conducting maintenance operations to prevent unnecessary losses.