Challenge

Automobile Front Fender Design

SSai Charan Kulukuri5 Apr 2021

Automobile Front Fender Design

Introduction:

Fender is the American English term for the part of an automobile, motorcycle, or other vehicle body that frames a wheel well (the fender underside). Its primary purpose is to prevent sand, mud, rocks, liquids, and other roads spray from being thrown into the air by the rotating tire.

For a vehicle moving forward, the top of the tire is rotating upward and forward and can throw objects into the air at other vehicles or pedestrians in front of the vehicle.

In addition to the fender other components like inner mount, side, and cowl mounts are fastened with the help of well nuts. They provide sufficient protection to the engine room components and suspension etc.,

Thus, the fender stops all the debris from the road throwing into the air. In addition to the fender, Fender skirts are provided to provide better protection.

Fender location on the car

Rear and Front

Types of fender:

Full Bumper Type:

The full bumper type is the traditional type of fender where more material consumption is observed. This type is used in the old designs of automobiles where it increases the overall weight and thus reduces performance. The maintenance also relatively more due to more surface.

Half Bumper Type:

Half bumper type is the modern design where less material consumption is observed, so productivity increases by reducing the size of the blank and thus providing more performance. The maintenance also relatively low compared to the full bumper type.

We are changed from full bumper type to half bumper type to reduce the scrap rate per blank. In the full bumper, we can only produce one Fender per blank, whereas as a half bumper type we can produce 2 fenders per blank.

Given:

Fender Class A surface and master section of the Drip area.

Class A surface of fender.

Rules for Drip Area creation

Mounting Points:

Fender is going to fix on following locations

Drip Area:

Two main points to be remembered while designing the drip area.
A minimum gap of 200 mm should be maintained from the rear end of the fender. This is because to have spacing for cowl mounting.
The second thing is to maintain a minimum gap of 150 mm front end of the fender for headlamp mountings.
It is considered to be important because it is mounted on the engine compartment.

Bumper mount:

It is the front portion of the fender where the bumper is mounted with the help of brackets.

Splash mount:

The Splash area also plays a vital role in anti-chipping.
It protects the dust particles, spray particles from being entered inside the car.
Thus Splash plays a vital role in the fender.

Sill mount: It is the front portion of the fender where the bumper is mounted with the help of brackets.

A-Pillar mount:

A pillar is a region where the A-pillar of the car is mounted from the front fender. It is located at the top right corner of the fender.

Aim:

To design and develop drip area and mounting points by following OEM regulations.

Procedure:

Check for the boundaries on the given surface and work on them

After that manipulate the outer surface for mounting points.

First, draw the sketches on the outer surface using (boundary, splines)

After, join the splines and spilt the outer surface of mounting points.

Drip area:

First, sketch the drip area according to master section in side view and extrude.
After that trim with the outer surface to get the emboss
Use the hole command to get holes.
Ribs are provided to improve the stiffness and holes are given for mountings over the engine compartment.

A-pillar mount:

Create a sketch according to mount and use extrude, offset, draft, trim to create emboss.
Use the hole command to create the hole