For the assembly of the door outer skin, the new door outer skin to be installed will be processed by electric riveting welding holes with a drilling machine or a punching machine. Use a grinder to remove paint from welding and brazing. Apply a penetrable coating on the exposed metal welding area and a primer on the exposed metal area.
After the above process is completed, you can install the door on the car body and check the matching between the door and the car body. If there is no problem, remove the door to tidy it up, and then install the door.
The importance of door maintenance:
Automobile door is an important part of car body, which directly affects many aspects such as safety, convenience, comfort, anti-theft and so on. Therefore, we should pay enough attention to its design and maintenance. For example, in the C-NCAP crash experiment, whether the door can be opened smoothly after the collision is regarded as an important symbol of vehicle safety. C-NCAP is three kinds of collision tests: frontal collision between a vehicle with a speed of 50km/h and a rigid fixed-wall obstacle with an overlap ratio of 100%, frontal offset collision between a vehicle with a speed of 56km/h and a deformable moving-wall obstacle with an overlap ratio of 40%, and side collision of a vehicle with a speed of 50 km/h. According to the test data, the test scores and total scores are calculated. This is the authoritative experiment of vehicle evaluation in China at present.