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What are the design requirements for automotive sheet metal parts on the market?
2020-03-17 16:36:45

Stiffeners are commonly used in the manufacturing industry. In the automobile, in addition to have the special request appearance surface, most automobile body sheet metal will design the stiffener. Stiffeners are commonly used to enhance local area strength and stiffness, improve NVH performance, etc. . In addition to the key parts, the general design of the stiffener has little impact on the performance of the vehicle, so the study of the design and effect of the stiffener in the field of automobile body is not as important as the study of collision performance, lightweight and so on. At the same time, the stiffener on the automobile sheet metal, because of spanning the automobile performance and mechanical performance, its in all kinds of automobile and mechanical books mentioned less, so the automobile industry on the use of stiffener is widespread, but not in-depth research. However, in the actual automobile sheet metal design, manufacture and on-the-spot inspection process, we can find that the function of stiffener to automobile is not simple. The correct design and use of the stiffeners can improve the performance and manufacturing technology of automobiles, and the cost of performance improvement is very low. At the same time, the stiffeners are designed in inappropriate places, which will cause cracking and other failure situations, affect the performance of the whole vehicle. Therefore, it is very necessary to study the stiffener of automobile sheet metal. Stiffness refers to the ability of material or structure to resist elastic deformation when subjected to force. When designing a bending part, the stiffness of the deformation part should be strengthened, such as adding stiffeners at the turning part, etc. , can increase the strength and rigidity of stamping parts, reduce back. 


Automotive sheet metal pieces

The stiffness of the part is increased and the springback is reduced after the reinforcement of the support is increased. On some large plane of the car, such as before, after the floor, item cover, etc. will increase or horizontal or vertical stiffener to reduce the deformation of parts during transportation. Large flat parts are easy to deform when they are moved, and all of these auto parts need to be treated as lifting stiffness. It is a common way to enhance the rigidity of the automobile sheet metal by increasing the stiffener. A large number of studies have shown that the car has a good stiffness, strength and other performance at the same time can pursue lower body quality. Modern car design should ensure adequate body performance at the same time, with small body mass. In today's focus on energy-saving emission reduction, lightweight body has been the focus of many manufacturers. The lightening is mainly carried out by means of structure design, material selection, manufacturing process optimization and material thickness reduction. The effect of stiffeners is mainly in the category of thinning material thickness. For example: t 1.2 mm material thick parts, by adding appropriate reinforcement in the appropriate part can reduce material thickness to t 1.0 mm, to achieve the effect of weight reduction. This kind of practice has been more widely used, I will not repeat here, the need to pay attention to: reducing the material thickness of parts suitable for structural sensitivity analysis in the low-sensitive area. Through reasonable design, the stiffener can improve the rigidity, and it can accelerate the deformation when the stiffener is perpendicular to the force transmission path. For example, in order to absorb more impact energy in a car crash, engineers have designed some compression feeders at the front end of the longitudinal beams so that, when pressed by impact, the stiffeners can cause the front end of the Kaifeng to bulge or bend in a folding way, thus weakening locally, the distribution of vehicle stiffness is in accordance with the design principle and energy absorption curve, and finally meets the requirements of collision. Drawing process is a key process in stamping process, which directly affects the quality of parts, Material Utilization Ratio, production efficiency and manufacturing cost. If the design of parts depth is not uniform, asymmetric, pressing area is small, should consider the design of some drawbead to increase feed resistance, in order to effectively prevent wrinkling and cracking. As shown in figure 6, the front wheel cover plate in stamping CAE analysis found local wrinkling, re-analysis after the increase of stiffeners, wrinkling reduced. That is, when there is wrinkling in the stamping process, the problem can be solved by reasonably adding ribs.

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Auto Body Parts,Sheet Metal Body Parts,Auto Parts Manufacturer

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