How to distinguish the advantages and disadvantages of automobile sheet metal parts in the market?

2020-09-01 10:55:15

To distinguish the quality of automobile sheet metal parts, generally speaking, we can start from the packaging, weight, welding process, painting process and the matching degree when loading. It is very difficult for ordinary car owners to distinguish whether the sheet metal parts are of high quality after delivery. They may as well distinguish from the product packaging in advance: the products produced by small factories will not print the contact information and address, while the regular manufacturers will also have steel seal, qualification and inspection label on the products in addition to the contact information and address, even if the consumers will be able to identify whether the sheet metal parts are of high quality after delivery At present, there can also be a way to protect rights.

Product weight is one of the inspection standards to measure the quality of sheet metal parts. In order to ensure the safety of automobile, the steel plate used in automobile sheet metal parts must reach a certain weight. The weight of the original factory sheet metal parts and high-quality subsidiary factory sheet metal parts should be almost the same, and if the sheet metal parts you buy is one third lighter than the original factory sheet metal parts, it is no doubt that what you buy will be a small factory product. As for the welding process, it is also the method to distinguish whether the sheet metal parts come from large factories. The sheet metal parts produced by regular manufacturers will adopt the operation mode of mechanical cutting and welding, and the welding spot or cutting edge are flat and smooth, and the rough edge of the cutter will not be left.

Many car owners think that the body parts need to be sprayed with paint of the same color as the original car. Therefore, they will ignore the painting process of the sheet metal parts when purchasing the sheet metal parts, thinking that it is irrelevant, but this idea is not correct. In order to prevent oxidation and corrosion, sheet metal parts need to be painted before leaving the factory. It is true that the painting process after replacing the sheet metal parts can not only color the color, but also protect and prevent oxidation. However, if the paint spraying treatment of small factory's sheet metal parts has uneven adsorption and foaming during production, the effect of post painting will be affected As a result, it is easy to fall off and cause corrosion in the process of use, which affects and damages the quality of sheet metal parts.

The matching degree of sheet metal parts during loading is also a key point to distinguish the quality of sheet metal parts. It will determine whether the final effect of loading is beautiful or not, and at the same time, it also determines the difficulty of installation. Therefore, it is also a factor that many sheet metal repair technicians are very concerned about. If the fitting degree of the sheet metal part and the original vehicle is low, such as the hole position can not be aligned, and the error of loading clearance and flatness is too large (the one-way tolerance of high-quality sheet metal parts in this respect should be controlled below 1.0 mm), it can be basically judged that this is a unqualified product from a small factory. Few car owners notice that a strong collision will cause slight deformation of the whole car body. At this time, if the sheet metal parts with large clearance are installed again, the body will be deformed again and the damaged vehicle will be affected to restore its original appearance and quality. Although experienced sheet metal technicians will eventually adjust this kind of sheet metal parts to a better loading effect through drilling, grinding and welding, it will be more time-consuming and laborious, and the quality and service life of this kind of sheet metal parts are not as good as those made by mechanical precision. Therefore, the car owners are better to choose the original factory parts or first-class auxiliary parts which are consistent with the gap of the original workshop, and can be installed in one step to avoid or reduce the damage caused by the "secondary processing" of the sheet metal master.

The above is to distinguish the quality of automotive sheet metal parts of some knowledge, I hope to give some help to car owners who need to buy sheet metal parts. Of course, it is not to say that the selection of high-quality sheet metal products can be completely carefree. Like many parts of the car, sheet metal parts also need reasonable use and maintenance. The key to prolong the service life of sheet metal parts is to reduce the outdoor parking and driving in sand water, and regularly spray paint on the inside of sheet metal parts to prevent corrosion.