Fender Design

FENDER DESIGN:

AIM:

To design a fender of a car by following the given master section as per the design considerations of OEM.

FENDER DEFINITION:

Fender is a part of an automobile or other vehicle body that frames a wheel as well (the fender underside). Its primary purpose is to prevent sand, mud, rocks, liquids, etc.,

It is an aesthetic component of a car that frames the wheel.

Fenders are typically rigid and can be damaged by contact with the road surface.

The main purpose of fenders on cars is that they shield the wheels and they protect the passengers, pedestrians, and other vehicles from stones, mud, liquid, and other debris that can fly in the air because of the speeding rotating wheels while the car is running.

TYPES OF BUMPER:

• FULL BUMPER TYPE
• HALF BUMPER TYPE

FULL BUMPER TYPE:

• This type of bumper is at an earlier stage in the car industries are used.
• They contribute to the major increment of the steel weight by just covering the front headlights with respect to the bumper region
• the problem that came from this type is the steel weight more cost and a lot of wastages in the blank and every inch of a material is a cost to the industry

HALF BUMPER TYPE:

• These fenders are mainly used for serving the purpose of cost-cutting and reducing enough proportions of the steel weight resulting in a reduction of the weight of the vehicle slightly.
• They can be economically manufactured, i.e by slightly increasing the blank size, we can produce two fenders at a time.

DESIGN CONSIDERATIONS:

Design Criteria :

• Embosses are provided to increase strength.
  
  
• Smooth curves are designed for easy manufacturing of panels.
  
  
• Ribs are provided to drip area mount to give structural support and extra strength.
  
  
• Maintain an extra 10mm from the flat surface for the fastener holes.
  
  
• All fillets should maintain a 2 or 3-mm radius in most regions.
  
  
• The thickness of the fender is 0.75mm.

The front fender has basically five mounting positions with respect to the other components. The mounting positions are as follows:

1. Drip Area Mounting.
2. A-Pillar Mounting.
3. Sill Mounting.
4. Bumper Mounting.
5. Baffle Mounting.

For the creation of a drip area, the given Master Section is followed.

1. Drip Area Mounting:

• The drip area is the most important mounting in a fender, it is the point where the fender has to be attached to the engine compartment.
• The drip area should be designed in such a way that it should be at least 150mm away from the front end of the fender to have sufficient space for mounting headlamps housing.
• Mostly the drip area starts from 200mm away from the rear end of the fender, to have sufficient space for the cowl which carries the wiper equipment.
• the hole dia is 5 mm and the fillet radius varies as given in the master section.
• The length of the drip area depends on the length of the fender.

2. A-Pillar Mounting:

• This mounting position is created for attaching the fender to A Pillar of the vehicle.
• The mounting has to be created by taking the reference from the A-pillar of the vehicle.
• Enough clearance should be given for the easy mounting of the wiper equipment.

3. Sill Mounting: Sill mounting is created on the bottom portion of the fender for attaching to the sill.

4. Bumper Mounting: This mounting point is created for attaching the bumper to the fender. It should have enough strength to hold the bumper steadily.

5. Baffle Mounting: These mounting points are created for attaching plastic components i.e baffle which prevents chipping inside the engine compartment.

final fender design part:

geometrical tree:

CONCLUSION

The front fender is designed according to the given master section and CLASS A Surface as per the OEM Standards.