Automotive sheet metal pieces of the secret of how to distinguish the pros and cons of automotive sheet metal pieces

　　Automotive sheet metal pieces, generally refers to the metal car shell, it is usually made of steel plate, on the basis of ensuring we'll have a certain intensity, try to lose weight is a basic requirement for it. Plays a role of protection and beautiful automotive sheet metal parts in addition to, or cars to bear the main carrier of gas drag. Therefore, automobile sheet metal parts, the quality and life affect car shape not only beautiful, also will increase due to the quality and the deformation of the air resistance, the car makes its economy.

　　1. The sheet metal parts and its classification
　　Automotive sheet metal parts according to the manufacturer to points can be divided into two categories: original and deputy factory. The so-called "original" generally refers to the loading for oems supporting piece; "Deputy factory" is a supporting manufacturers of accessories. Most of the original price is higher than deputy factory. Generally people think in the repair station to replace original factory or in the auto parts market buy original parts should be with the original car, it will there is a big or small difference. "Original", for example, classes and sheet metal parts are divided into several levels: the first level quality, the best is special loading, which is the original of a vehicle, it simply cannot buy outside; The second level is the supply of repair station, in addition to the installation or replacement process may lead to the gap, the product itself and the first level is not too big difference; The third level is the flows of accessory products to the retail market, sell, though still is original pieces of higher prices, but in fact its quality cannot and compared with the original car. Compared "generic" product quality is good and bad are intermingled, too: level 1 of the "generic" automotive sheet metal pieces of products can be comparable to original factory almost, this kind of products from the capital, more powerful hardware vendors, from material selection to production line machinery operation can guarantee the standardization; Level 2 of the "generic" parts, materials and manufacturing processes are inferior to level 1 of the products; And the last category, it is most often, no quality at all, only rely on low prices to deceive consumers. Some pit irregularities, the so-called original factory parts is from auto parts wholesale market of inferior "deputy factory", in order to seek exorbitant profits, to the owner to sell, all in the name of "original" when the price of the natural is far higher than the auto parts market. So, how to distinguish the pros and cons of sheet metal parts? We consulted with has many years experience of automotive sheet metal parts repair, senior technician.
　　2. How to distinguish the pros and cons of sheet metal parts
　　According to sheet metal ROM teacher, to distinguish the quality of sheet metal parts, may be broadly from the packaging, weight, welding, spray painting of the process and when loading, and other aspects. Ordinary owners in the car before it is difficult to discern whether sheet-metal part quality, might as well went up from the packing of the products in advance can tell: general small factory production product will not print on the contact and address, and the regular vendor in addition to the contact information and address, the product will have steel seal, qualification and examination on the label and so on, even if the problems appeared in the process of consumers in the future use, also can have a way of safeguarding rights.
　　The weight of the product is one of the testing standard of sheet metal parts. In order to guarantee the safety of the car, automotive sheet metal pieces of steel plates must reach a certain weight. Original sheet metal parts with high quality deputy factory of sheet metal parts weight should be same, and if you buy the sheet metal parts sheet metal pieces of lighter than the original by a third, which is undoubtedly will you buy a small plant products. As for the welding process, is the difference wether sheet metal pieces of metal. Sheet metal parts will produce by normal manufacturer adopts mechanical cutting, welding operation method, the solder joint or trimming is level off is smooth, does not leave the burrs of rough cut hand.
　　Finally sheet-metal part that many car owners would like to spray paint color same with the original car, so the choose and buy will ignore the spray paint process to sheet metal parts, sheet metal pieces thought it doesn't matter, but the idea is not correct. In order to prevent oxidation, corrosion, metal sheet needs to be before they go out after spray paint process, indeed, change of sheet metal parts after painting link except for its color, you can also have the effect of protection, prevent oxidation, but if it is a small factory of sheet metal parts, its production of uneven adsorption of spray paint processing, blister, will affect the spray effect, cause its in use process is easy to fall off and cause corrosion, impact and damage the quality of sheet metal parts.
　　Of the loading, when the sheet metal is resolution of sheet metal parts is the key point, it will determine the final effect of loading whether beautiful, determines the ease of installation at the same time, hence many of the factors of teacher is very concerned about sheet metal. If the sheet metal parts with the original car inosculation is low, such as hole cannot be aligned, loading clearance and flatness error is too large (high quality sheet metal pieces in this aspect of the unilateral tolerance to control below 1.0 mm), the basic can determine it is a from the small plant is unqualified products. ROM teacher said, few owners noticed that strong collision can cause slight deformation of whole body, as if to large installation clearance of tough sheet metal parts and components, will cause the body deformation again, impact damage to the vehicle back to the original appearance and quality. Although experienced sheet metal mechanic will eventually put the metal sheet by means of drill grinding and welding school to good loading effect, but it will be time-consuming, laborious, life quality also not as good as made by mechanical precision sheet metal parts. Drivers so that when the choose and buy is the best option to match with the original car space degrees or the level of deputy factory original, can one pace reachs the designated position when installing, avoid or reduce the master sheet metal "secondary processing".
　　Above is to tell some knowledge of the automotive sheet metal pieces of quality fit and unfit quality, the hope can give to buy sheet metal pieces of owners to be a friend to help. And, of course, is not to say that choose the high quality sheet metal products can be completely secure, and many auto parts, sheet metal parts also need to reasonable use and maintenance. Reduce standing outside and run on the sand and water, as far as possible on a regular basis for sheet metal parts inside of the spray paint to prevent corrosion and so on are the key to prolonging the service life of the sheet metal parts.