How to distinguish the quality of the automobile sheet metal parts?

The automobile sheet metal part usually refers to the metal shell of the automobile, which is usually made of steel plate. To ensure that it has a certain strength, minimizing the weight is the basic requirement for it. In addition to the protection and beauty of the automobile sheet metal parts, it is also the main carrier for the automobile to withstand the gas resistance. Therefore, the quality and life of automobile sheet metal not only affect the appearance of the car, but also increase the resistance of the air to the car due to the quality and deformation, and make the economy decline.

The automobile sheet metal parts can be divided into two types according to the manufacturer's points: the original and the auxiliary parts. The so-called "original factory" generally refers to the loading parts for the complete vehicle plant; the "Auxiliary Factory" is a non matching kit produced by the non supporting manufacturers. The price of the vast majority of the original works is higher than that of the auxiliary factory. It is generally believed that the original parts purchased at the special repair station or the original parts purchased in the auto parts market should be different from the original ones, but in fact, there will be large or small differences. For example, the "original" of sheet metal and divided into several levels: the first level is the best quality, special loading is, the original car with the outside, do not buy; second level products is the supply of special maintenance station, in addition to installation or replacement process may bring the gap, products with the first class itself is not much difference; third level is the flow of retail market products, although still selling original parts prices high, but the quality has not really brought the original car and compared. "Vice factory" product quality is also uneven in quality: a "factory" of automotive sheet metal products almost comparable to the original pieces, the products from the capital, the strength of hardware manufacturers, can guarantee the standardization of the material to pipelinemachinery operation; two "vice factory", the material and the manufacturing process are inferior to the level of products; and the last category, is the most bad quality, nothing at all, only rely on low prices to deceive consumers. Some maintenance stations operate illegally, and the so-called original parts are actually from the wholesale market of the inferior parts of the auto parts market. In order to make huge profits, they will sell the banner of the original factory when they sell them to the owners, and the price will naturally be much higher than that of the auto parts market. So, how to distinguish the advantages and disadvantages of the sheet metal parts?

To distinguish the quality of sheet metal parts, in general, it can start from many aspects, such as packaging, weight, welding process, painting process and loading degree. Ordinary owners after delivery of the vehicle to distinguish whether the quality of sheet metal parts is very difficult, you can advance from the product packaging to distinguish: general small factory production of the products are not printed on the contact and address, and the regular manufacturers in addition to contact and plant products, there will be a seal, qualification and testing the label, even if consumers in the use of days after the problems, can also have a right way.

Product weight is one of the test standards for measuring the quality of sheet metal parts. In order to ensure the safety of the car, the steel plate used for the automobile sheet metal parts must reach a certain weight. The weight of the original sheet metal parts and the quality sub factory sheet metal parts should be almost the same. If you buy the sheet metal parts lighter than the original sheet metal parts 1/3, then you will buy a small factory product. As for the welding process, it is also a way to distinguish the sheet metal from the big factory. The sheet metal parts produced by regular manufacturers will be mechanically cut and welded. Their solder joints or trimming are smooth and smooth, and will not leave rough edges of cut hands.

Many owners think that the final part of the sheet metal part needs to be painted with the same color as the original car. Therefore, when selecting sheet metal parts, it will ignore the painting process of sheet metal parts, which is of no importance, but this idea is incorrect. In order to prevent oxidation, corrosion, metal parts in the factory have to go through the process, the paint indeed, change after the sheet metal paint part in addition to its color, but also to protect and prevent oxidation, but if it is a small sheet metal factory, the production of spray paint processing adsorption not even, foaming the case, it will affect the final painting effect, which is easy to fall off, in the process of using lead to corrosion, impact and damage the quality of sheet metal.

The consistency of sheet metal loading is also critical to distinguish the quality of sheet metal parts. It will decide whether the final effect of loading is beautiful or not, at the same time determines the difficulty degree of installation, so it is also a great concern for many sheet metal maintenance masters. If the sheet metal parts with the original car with low degree, such as holes can not be aligned, flatness error loading clearance is too large (sheet metal quality in this regard to unilateral tolerance control below 1 mm), basically can determine this is the one from the small factory of substandard products. Master Luo said that few owners noticed that a strong collision would cause slight deformation of the entire car body. If the hard metal plate parts with larger clearance were installed, the body would be deformed again, and the damaged vehicle would be restored to the original appearance and quality. Although experienced sheet metal mechanic will eventually adjust the sheet metal to a better loading effect through drilling and grinding, it will be time-consuming and laborious. Besides, the quality and life span of the sheet metal parts will not be as good as that of the sheet metal parts manufactured by machine precision. Therefore, when buying, it is better for the owners to choose the original parts or the first class auxiliary parts which are identical with the original workshops. When installing, they can be placed in one step to avoid or reduce the damage caused by the "two processing" of the sheet metal master.

The above is to distinguish the quality of the quality of the automobile sheet metal parts of some knowledge, hope to be able to choose and purchase sheet metal parts of the owners of the owners of some help. Of course, it doesn't mean that the selection of high-quality sheet metal products can be completely carefree. Like many parts of automobiles, the sheet metal parts also need reasonable use and maintenance. Minimizing the outdoor parking and running in the sand water, regularly spraying the paint on the inside part of the sheet metal and preventing rust is the key to extend the service life of the sheet metal parts.