The function of the front bumper of a car
The core functions of the front bumper include absorbing collision energy to protect the body, reducing the risk of injury to pedestrians, optimizing aerodynamic performance and enhancing the appearance .
Youdaoplaceholder0 Main Functions Analysis
Youdaoplaceholder0 Safety protection
Youdaoplaceholder0 Collision cushioning : The front bumper disperses impact force through plastic material and internal energy-absorbing structures such as foam or metal beams to reduce damage to the vehicle body structure.
Youdaoplaceholder0 Pedestrian protection : Flexible material design reduces impact on pedestrians' legs and lowers the severity of accidents.
Youdaoplaceholder0 Performance and design optimization
Youdaoplaceholder0 Aerodynamics : The front bumper design guides the airflow, reduces wind resistance and improves fuel efficiency.
Youdaoplaceholder0 Aesthetic integration : As the main exterior component at the front of the vehicle body, its lines and colors need to be in harmony with the overall design of the vehicle to enhance visual integrity.
Youdaoplaceholder0 Additional features
Youdaoplaceholder0 Component mounting platform : provides a fixed position for headlights, license plates, radiator grilles, etc., and ensures smooth air intake for the cooling system.
Youdaoplaceholder0 Lightweight demand : Plastic materials reduce weight, which helps to lower fuel consumption.
The working principle of the front bumper of a CAR mainly includes its energy absorption and force transmission mechanism in a collision. The front bumper not only serves to fix and support the bumper housing, but also absorbs and disperses the impact energy when the vehicle is hit, thereby protecting the safety of the vehicle body and passengers.
Energy absorption mechanism
The front bumper frame is composed of the main beam, the energy absorption box and the mounting plate connected to the vehicle. Main beam and energy absorption box can effectively absorb collision energy in low speed collision of vehicle reduce impact force damage to body longitudinal beam .
When the VEHICLE is HIT, the front bumper frame will first bear the impact and then transfer the impact to itself to protect the safety of the vehicle body and occupants .
Structural composition
The front bumper frame includes front bumper liner, front bumper frame right bracket, front bumper bracket left bracket and other parts, which together support the front bumper assembly .
The outer plate and buffer material are generally plastic, such as polyester and polypropylene, while the crossbeam is formed by stamping cold-rolled sheet into a U-shaped groove .
Installation steps
The installation steps of the front bumper include:
Attach the middle bracket to the front module and fix it.
Attach the left and right side brackets to the sides of the fender and fix them.
Connect the bumper wiring harness to the body wiring harness connector, then lift the bumper and hang it on the middle bracket.
Insert the side-flip clips on both sides of the bumper into the side brackets for fixation.
Fix the top with screws and push pins, and attach the bottom to the deflector plate or the front module for fixation.
Secure the wheel cover to the front bumper assembly .
The repair methods for plastic scratches on the front bumper of a car need to choose different schemes according to the degree of damage, includes toothpaste polishing, touch-up pen repair, self-spray paint spraying and professional welding and many other means can handle minor scratches by oneself or serious damage by professional repair.
Youdaoplaceholder0 Repair plan according to the degree of damage
Youdaoplaceholder0 Slight surface scratch .
Youdaoplaceholder0 Toothpaste polishing : Use regular white toothpaste and wipe the scratch in circular motion with a damp soft cloth for 2 minutes. This can reduce more than 70% of the shallow marks, especially suitable for polishing plastic surfaces as thin as a hair.
Youdaoplaceholder0 Scratch repair agent + polishing machine : Gently grind with 800-mesh sandpaper, apply special repair agent, and finally polish to restore luster.
Youdaoplaceholder0 Deeper scratches (exposed primer) .
Youdaoplaceholder0 Touch-up pen repair : Shake the touch-up pen well after matching the car model color number, apply 2-3 thin layers along the scratch direction, dry and wax to enhance protection. Suitable for coin-sized damages.
Youdaoplaceholder0 Self-spray paint application : The damaged area needs to be sanded and cleaned first. Apply in layers at a distance of 20 cm, with an interval of 5 minutes each time. Suitable for repairing large areas of palms.
Youdaoplaceholder0 Depression UNbroken DAMAGE .
Youdaoplaceholder0 4S store professional tool repair : Use suction cups, electric heaters and other equipment, restore to the original state in 20-40 minutes, no painting required.
Youdaoplaceholder0 Plastic welding gun welding : A hundred-yuan tool can repair cracks, strength up to 80% of the original, requires grinding and painting.
Youdaoplaceholder0 Severely damaged .
Youdaoplaceholder0 Bumper replacement : Suitable for large area cracking or structural deformation. 4S store replacement cost is higher but the effect is thorough.
Youdaoplaceholder0 Insurance claim : If you purchase vehicle damage insurance and the damage meets the criteria, the insurance company will cover the cost.
Here is a video about the repair of car bumpers:
Youdaoplaceholder0 Low cost quick fix tips
Youdaoplaceholder0 Creative sticker Cover : The waterproof reflective sticker can instantly cover small scratches on the bottom for both aesthetic and night-time safety.
Youdaoplaceholder0 Masking paper-assisted spray painting : Cover the surrounding area and spray locally to avoid paint mist contamination.
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