Design of backdoor

BACK DOOR / TAIL GATE

Aim:

To design a Backdoor of the car on sheet metal using he appropriate design and provided skin data by considering design rules.

Objective: To design the backdoor with design methodologies and and provide the emboses,reinforcements in the inner panel and side relief in outer panel to increase the strength.

Theory:

Backdoor:

The Back door of a car is a component which hinges at the back of the car to cover the boot space or luggage area, But there are more functions that come with it which has to be considered while making a design of the same like rear visibility criteria and boot space.

This part is usually designed keeping the master section of the rear roof rail because of the sealant flange and also various other considerations, as it is also in contact with the side body of the car.

It has back lights/ Tail lamps and Braking lights which is termed as "Third brake light" mounts on it, rear windshield fixes between inner and outer panel, in some back door spare wheel can be mounted on it, sometimes car registration number plate mounts on it and it gives a complete closed design to the car.

Backdoor images:

Design Considerations:

• Rear Visibility for safety and functionality
• Support Structures like Hinge and Gasstay/ Power lifter
• Rear Crash regulations
• Boot Space
• Mounts for wiper motor and lights
• Strength criteria
• Draft Analysis

Procedure:

Firstly we have to check if there are any surface irregularities in the skin data, If irregularies are there, then repair if by using a bridge curve curve and Through curve mesh and sew it.

Then we create a sealing flange. Generally with the help of master sketch, we will design the panel with appropriate dimensions. But here there is no master sketch,we designed by assumption.