As the main component, the surface of the door panel needs to be cleaned to remove impurities such as oil and rust to ensure good welding adhesion. The upper and lower heads and reinforcement ribs should also be pre-treated to ensure that their dimensional accuracy and surface quality meet the welding requirements. In the assembly process, with the help of precise fixtures, the heads and reinforcements are accurately positioned at the corresponding positions of the door panels, ensuring that the matching accuracy between the components reaches the millimeter level, laying the foundation for subsequent welding operations.

Automatic welding equipment is the core of this process. Advanced welding robots or automatic welding machines are usually used, which are equipped with high-precision motion control systems and intelligent welding power supplies. The welding robot can accurately move the welding gun according to the preset program and path to achieve uniform and stable welding of the connection between the heads and reinforcements and the door panels. During the welding process, the welding current, voltage, welding speed and other parameters are monitored in real time, and automatically adjusted according to the actual situation to ensure the consistency and reliability of the welding quality. The intelligent welding power supply provides stable welding energy to ensure that the weld depth and weld width meet the design requirements, effectively avoiding the occurrence of welding defects.

In order to further improve the welding quality, some auxiliary technologies will be used. For example, gas shielded welding methods such as argon arc welding or carbon dioxide gas shielded welding are used to prevent the weld from oxidizing at high temperatures by spraying shielding gas into the welding area, thereby obtaining beautiful and high-quality welds. At the same time, laser tracking or visual inspection systems are used to track the position and shape changes of the welding joint in real time, and the posture of the welding gun and welding parameters are adjusted in time to ensure the accuracy and stability of the welding process.

After welding is completed, strict quality inspection is required. Through non-destructive testing methods such as ultrasonic testing and radiographic testing, the inside of the weld is inspected to check for defects such as pores, cracks, and lack of fusion. At the same time, an appearance inspection is carried out to check the surface flatness, width uniformity, and connection with surrounding components of the weld. Only door panel products that have passed strict testing can enter the subsequent processing procedures or be put into use.

The automatic welding process of upper and lower heads and reinforcing ribs on door panels has become an indispensable key link in the modern door panel manufacturing industry with its high efficiency, precision and reliability, and has effectively promoted the quality and efficiency improvement of door panel production.