Hood design-Week 2

HOOD DESIGN

It is the hingedcover over the engine compartment of motor vehicles that allows access to the engine compartment for maintenance and repair.

COMPONENTS

1. Hood Outer Panel

2. Hood inner panel

The inner panel provides strength and support, it is where the hinges and strikers are attached

3. Hinges

Hinges allow the hood to rotate around a fixed axis for opening and closing movement.

4. Latch and Striker

Latch and striker mechanism is provided to lock the hood, in order to prevent accidental opening of the hood during driving. The latch is present on the engine compartment while the striker is attached to inner part of hood.

5. Support rod

It is a device that supports the hood and helps to keep it in the open position

6. Reinforcements

The reinforcements are provided to add materials to the inner panel to provide extra strength to the hood to compensate for loss of strength near component installation areas.

Latch Trajectory:

It is the path along which the hood rotates during opening and closing movement. The striker on the hood follows a particular path while opening or closing the hood, which is along circumference of a circle with center at the hinge axis. This path is nothing but latch trajectory.

Mastic Sealant:

Mastic sealant helps to locally improve strength of the hood. It is generally a hard rubber part, which is introduced as a paste in between inner and outer panel of the hood, which will get hardened inside the furnace. Every mastic sealant point will have a tendency to improve the local strength in around 80 mm diameter. Considering this, the mastic points are positioned such that most of the hood region is covered

Embossing –

Sheet metal embossing is a stamping process for producing raised or sunken designs or relief in sheet metal. This process is carried out by means of matched male and female roller dies,

Hemming

Hemming is a forming operation in which the edges of the sheet are folded over other part or simply folded in order to achieve a tight fit. In car part production, hemming is used in assembly as a secondary operation after deep drawing, trimming and flanging operations to join two sheet metal parts (outer and inner) together.

Deep Drawing

It is a sheet metal forming process in which a sheet metal blank is radially drawn into a forming die by the mechanical action of a punch. The process is considered deep drawing when the depth of the drawn part exceeds its diameter.