Hood design-Week 2

HOOD DESIGN:

Hood is the main component of the car at the front position. It is used to decorate cars and have a luxurious look. The shape of the hood is made aerodynamic in order to minimise the air effect.

COMPONENTS OF HOOD;

• Outer panel
• Inner panel
• Striker
• Hinge

OUTER PANEL

It is an aesthetic part of the hood.on the other words outer skin of the hood. It gives a stylish look to the car front portion.

INNER PANEL

The inner panel provides strength and rigidity to the hood and is also used for reduction of NVH purpose.

Its directs force of the collision outwards instead of engine component

STRIKER

It is the device that works as a locking mechanism and opeening and closing of the hood

HINGE

It is use as a opening and closing of the hood

LATCH TRAJECTORY

Latch trajectory is given by the circle drawn by the axis.hinge axis point is the centre point the hinge axis .That hinge axis provides the surety of whether the striker is perfectly constrained the latch point or not.

Mastic datas

In the hood, Mastic is used in between inner and outer panels. It is a type of liquid sealant that occurs in an elastic state, thus making it flexible yet still keeps the bond of the surface that is attached together

EMBOSS

Through the inner panel various differnt types of emboss . All are used to provide stiffness of the inner panel through the emboss. the size and shapes of the emboss is declare the direction the force distribusion of collision of frontal crash of car. The force is should be always distributed away from the passengers.

Hemming

Hemming is a technology used in the automotive industry to join inner and outer closure panels together (hoods, doors, tailgates, etc.). It is the process of bending/folding the flange of the outer panel over the inner one. The accuracy of the operation significantly affects the appearance of the car’s outer surfaces and is, therefore, a critical factor in the final quality of a finished vehicle.

Data to be used:

Hood Thickness Information

Outer Panel Thickness = 0.75mm

Inner Panel Thickness = 0.75mm

Reinforcement Thickness = 1.5mm

Manufacturing process

DESIGN CONSIDERATION

Head Clearance:

Head clearance is decided upon the zone or country. So same car if it is made for a different country will have different opening angles depending on the country or region.

The distance C and D shown in the image is represented as a graph in the upper right corner of the image. Choosing the right head zone position will decide upon the angle of the hood opening.

Product engineers will also get input from the marketing team for deciding the head zone.

CONCLUSION:

FINAL ASSEMBLY :