Fender Design

FENDER DESIGN

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

INTRODUCTION :

Fender is the american english term for the part of an automobile, motorcycle or other vehicle body that frames a wheel well. Its primary propose is to prevent sand, rocks, mud, liquids, and other road spray from being thrown into the air by the rotating tire. Fender are typically rigid and can be damaged by contact with the road surface.Sticly materials, such as mud, may adhere to the smooth outer tire surface, while smooth loose objects, such as stones, can be become temporarily embedded in the tread grooves as the tire rolls over the ground. These materials can be ejected from the surface of the tire at high velocity as the tire imparts kinetic energy to the attached objects. For a vehicle moving forward, the top of the trie is rotating upward and forward, and can throw objects into the air at other vehicle or pedestrians in front of the vehicle. Fender is a front outer side member of a car, which covers the wheel side. It has so many small features with ups and downs.

FENDER

It is an aesthetic component/part of a car that frames the wheels. Prevention of sand, mud particles, and other road contaminants from being thrown into the engine compartment and also to the pedestrians by the rotating tires are the main purpose served by the fenders.

The front fenders are separate components whereas the rear fenders are integrated with the body sides.

Front fender images

TYPES OF FENDERS

1. FULL BUMPER TYPE: These types of fenders were used in earlier models of vehicles. They contribute to the major increment of the steel weight by just covering the front headlights with respect to the bumper region. The problem associated with this kind of fender is there is a lot of wastage in the blank and every inch of a material is a cost to the industry.

2. HALF BUMPER TYPE: These fenders are mainly used for serving the purpose of cost-cutting and reducing enough proportions of the steel wait 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.

MOUNTING REGIONS ON FENDER :

PURPOSE OF THE FENDER :

ENGINE SAFTEY : Protect the engine, occupants and passers by from items, water, mud, snow, ice, thrown off the tires as you drive.

PEDESTRAIN SAFTEY : Protects pedestrain from the wheel, e.g. its better to be it by a laterally moving fender than a rolling tire, keeps loose, streaming items from being wrapped up in a rolling wheel.

AEWRODYNAMICS : Smooths the car profile so you don't get a lot of drag off the uncovered wheels. Some fenders are enclosed on the side for this.

GOOD CAR APPEARANCE : Looks better with fender, gives a finished look, looks more streamlined.

There are 5 mounting regions on the fender as following-

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

MaSTER SECTION (Given data):

DRIP AREA :

Drip area mounting is the important part in the fender . this mounting is attached to the engine compartment of the car . fender drip area is mounted via weldnuts to the engine compartment .a min of 150mm distance is kept from the front side and a distance 300mm or less can be kept on the rear side . the total length of drip area from the top of fender should be less than 40mm , this is to avoid the springback during the manufacturing . the edge of the mounting should atleast 10mm away from any nearby component in the engine . a rigidity bead is provided at the end to increase the strength of the mounting .

A PILLER MOUNTING AREA :

The A-pillar area mounting depends upon the A-pillar of the car . the mounting can also be provided with ribs to strengthen the part . this mounting is critical in design as it has to be mounted on A-pillar properly .

SILL MOUNTING AREA :

The area at which the bottom of the fender gets connected to the floor near the bottom edge of the door. The Embossed sill mounting of the fender is attached with the fasteners.

BUMPER MOUNTING AREA :

Bumper mounting area is used to fix the plastic bumper to the fender with the help of the fasteners

BAFFLE MOUNTING AREA :

In this region, the baffle gets installed to the fender with the help of clips which holds the baffle with the fender along the wheel arch.

DART :

Darts are provided at the bend to reduce the shakiness caused by the vibration of engine of the mounting area gives as well as it stiffen the area. It specialy provided at the lager area.

INDICATOR AREA :

This is the pierced area on fender as shown in below image which is happen to be use for side indicator, Where indicator are mounted.

Here are some pictures of designed fender by different angles , below

CONCLUSION :

Here, the Drip area, Apiller mounting area, Sill mounting area, bumper mounting area and baffle mounting area has been designed withy respect to the all of thye given data.