The function of the front bumper of a car
The car bumper is a safety device that absorbs and reduces external impact forces and protects the front and rear of the vehicle body. Many years ago, the front and rear bumpers of cars were made by stamping steel plates into channel steel, which was riveted or welded to the longitudinal beams of the frame. There was a relatively large gap between them and the car body, which looked very unattractive. With the development of the automotive industry and the extensive application of engineering plastics in it, automotive bumpers, as an important safety device, have also embarked on a path of innovation. Today's front and rear bumpers of cars, in addition to maintaining their original protective functions, also strive for harmony and unity with the vehicle body shape and pursue their own lightweight. The front and rear bumpers of a car are both made of plastic, which people call plastic bumpers. The plastic bumper of a general car is composed of three parts: the outer plate, the cushioning material and the crossbeam. Among them, the outer plate and buffer material are made of plastic, and the crossbeam is formed into a U-shaped groove by cold-rolled thin plate stamping. The outer plate and cushioning material are attached to the crossbeam.
Among the materials for automotive bumpers, toughened polypropylene plastic (PP) has the best comprehensive performance , combining high rigidity, impact resistance, scratch resistance and cost advantage, and is currently the mainstream choice.
Youdaoplaceholder0 Performance comparison of mainstream materials
Youdaoplaceholder0 plastic material (mainly PP) .
Youdaoplaceholder0 Advantages : lightweight (reducing fuel consumption), good energy absorption effect (not breaking in an 8km/h impact), corrosion-resistant, easy to repair, low cost (10%-20% lower than PU), and more environmentally friendly than ABS.
Youdaoplaceholder0 Disadvantage : Slightly weaker low-temperature resistance, and aging may occur after long-term use.
Youdaoplaceholder0 represents types : toughened polypropylene (PP), ABS, PC/ABS alloy. Among them, PP is the first choice for economy cars due to its high cost performance, while ABS is mostly used in high-end models.
Youdaoplaceholder0 metal material (steel/aluminium) .
Youdaoplaceholder0 Advantages : High strength, suitable for special scenarios such as heavy-duty vehicles and military vehicles.
Disadvantages of : it is heavy (increasing fuel consumption), its shape is limited, and its maintenance cost is high. It has gradually been replaced by plastic.
Youdaoplaceholder0 carbon fiber material .
Youdaoplaceholder0 advantages : ultra-lightweight (to enhance performance), mainly used in supercars.
Disadvantages of : extremely high cost and low popularity.
Youdaoplaceholder0 overall recommendation
Youdaoplaceholder0 For ordinary family cars : prioritize PP material to balance performance and cost.
Youdaoplaceholder0 High-end models : ABS or PC/ABS alloy can be considered to enhance durability and aesthetic appeal.
Youdaoplaceholder0 Special demand vehicles : such as off-road vehicles, engineering vehicles, etc., metal materials are still a necessary choice.
The core reason why bumpers should not be replaced as much as possible is that original factory bumpers have irreplaceable advantages in terms of safety performance, economy and vehicle value retention. If they are not severely damaged, prioritizing repair over replacement can best ensure the safety and value of the vehicle.
Youdaoplaceholder0 safety performance risk
Youdaoplaceholder0 Insufficient collision protection capability : The original factory bumper has been strictly designed and tested to accurately absorb and disperse collision energy, effectively reducing the harm to the occupants inside the vehicle; However, the quality of counterfeit parts varies greatly. They may not be able to effectively buffer during low-speed collisions, increasing safety risks.
Youdaoplaceholder0 Compatibility and reliability issues : The process and material differences of the aftermarket bumpers may lead to installation deviations, affecting the stability of the vehicle body structure, and even causing associated faults (such as line damage), resulting in higher maintenance costs.
Youdaoplaceholder0 Economic and value preservation effects
The replacement cost of is high : replacing bumpers involves material costs, labor costs and repainting costs, which are much higher than the repair cost. If you choose the original parts from the 4S store, the cost will be higher.
Youdaoplaceholder0 Vehicle depreciation risk : After replacement, it may be marked as an "accident vehicle", resulting in a significant decline in the value of the used car, especially for luxury brands, the depreciation is more obvious. Replacement caused by accidents has a greater impact than aging repair.
Youdaoplaceholder0 aesthetic and practical issues
Youdaoplaceholder0 Low appearance matching degree : Aftermarket parts are prone to color differences or shape deviations, which can disrupt the overall coordination of the vehicle body. The original factory bumper is highly consistent with the vehicle design and is difficult to restore after replacement.
Youdaoplaceholder0 Insurance claim obstacles : When insurance companies make claims, they usually give priority to recognizing original factory parts. Counterfeit parts may cause disputes and affect the claim efficiency.
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