Fender Design

OBJECTIVE- To develop the front fender using Siemen nx following the design parameters

1. FULL BUMPER TYPE:

The full bumper type fender was used in old cars, it covers the full area until the front lighting. But it has a lot of sheet metal material which is unnecessary and increases the weight of the fender. This type of fenders are no longer used in automobiles.

2. HALF BUMPER TYPE:

Mainly half bumper type is used in automobiles. It is basically related to scrap management. Half bumper type leads to less wastage of the blank.

What is purpose of fender of a car?

The purpose of a fender is pretty simple. Its purpose is to keep mud, rocks, and other road debris from being thrown around by the tires. In other words, the fender is a housing for the wheels that keeps road debris contained. If there was nothing covering the wheels, all kinds of debris would be kicked up by the rotating tires.

Design parameter

Mounting:

There are major 5 mounting points in the fender.

1. Body
2. A Piller
3. Sill
4. Cowl
5. Drip

Design procedure

Given master section

Follow the master section

DRIP AREA :

• It is the important mounting uni of the fender . it is connected with the engine compartment , therefore the lot of design constraints are to be followed while designing the fender
• While designing the drip area we have to initially leave 200-300 mm for cowl top
• For placing the headlamp we have to leave at least 150 mm at the front while designing the fender
• Cowl top part consists pf wiper motor and its instruments

• The height of drip area mounting should be less than 40mm so that it reduces the springback effect during manufacturing
• The edge of the mounting part should be atleast 10mm away from the nearby components in the engine .
• It should be distanced atleast 150mm from the front side ande 200m from the rear side .

• Ribs should be provided in order to increase the strength of the mounting part .
• Bead is provided at the outeredge to increase the rigidity of part .

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 mound area are used connect to fender and bumper. most of the impace on bumoer are transdered into the frnders so the design make more stiffned usign a dart also.

Baffle mounting :

The baffle is a part above the tire of automotive design which can prevent entering gravel,mud,water into the car the mounting can used to connect to baffle with push pin.

To avoid stress constranation a relife also provided.

Final output:

Finally thicken the part with .75 mm

CONCLUSION :

Finally design of fender is done with the help of NX-CAD software by following the master section

Since i used nx cad student version i donnt have option to convert to step and file and if any problem occur please letme know.