Fender Design Challenge

OBJECTIVE :

The main objective of this project is to design a fender

INTRODUCTION :

The design engineer sketches the product based on the the requirement converted into the 3D model . The another important thing in the design is that , every product that is designed should be able to manufactured . so the role of the design engineer is to design the product that can be easily manufactured and with less cost effective . The process of development of design carries on until the design satisfies the customer needs .Here in this project the product that we are going to develop is a car fender

FENDER :

The main purpose of the fender is to prevent sand,mud, rocks,liquids and another road spray from being thrown into the air by the rotating tire .

• Fender wheel arch is having some standard specifications , for example if you see the car from the front, if you see the wheel outside fender it does more chipping and it causes lots of damage to the pedestrians and also to the car
• In order to maintain the pedestrians safety we have to position the tire wheel inside the fender
• For the European requirement the clearance between the wheel and the fender outer most skin is 5mm
• This requirements changes from country to country based up on the road conditions

ASSEMBLY :

There are two types of assembly , they are

• Bottom-up assembly
• Top-down assembly

Bottom -up assembly: The bottom-up assembly is the most preferred approach for creating assembly models . In this type of assembly the components are created in part design work bench ( As nx cad part) file. Parts are conceived in assembly design workbench using product structure tools . After inserting each component,constraints are applied to position them properly in the 3d space with respect to the other components. This assembly is preferred for large assemblies, especially those having intricate individual components .

Top -down assembly :

In the top assembly design approach, components are created inside the assembly design workbench . There fore , there is no need to create separate part files of the components. This design approach is completely different from the bottom-up design approach. Here you have to create the product file first and then one by one create all the components. Note that even then the parts are created the product file , they are saved and opened individually one by one when they are needed . Here the construction and the assembly takes place simultaneously .

DESIGN 0F DRIP AREA MOUNTING :

• 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

• DESIGN OF SILL MOUNTING AREA :

  Sill is the panel directly below the bottom of the door supporting the floor and may be used to combine the floor and the body . The bottom end of the fender is mounted on the sill body for reinforcement of the fender panel , thus the sill mounting position is designed with holes and emboss . M5 fasteners are used to fix the fenders on the sill body.