Challenge

Design of backdoor

MMeldon Fernandes15 Jan 2021

Design of an automotive back door

Aim: To design the back door vehicle with the skin data provided.

Back Door:

The back door or boot of a car is the vehicle’s main storage or cargo compartment, often a hatch at the rear of the vehicle. Early designs included an exterior rack mounted on the rear of the vehicle to which it was possible to attach a real luggage trunk. Later designs integrated the storage area into the vehicle’s body and evolved to provide a streamlined appearance.

Type of working mechanism used for the back door

Gas Stay System: They are versatile hydro-pneumatic lifting mechanisms that help raise, lower, and support heavy objects. Some cars incorporate multiple sets of gas springs into the design of their various hoods, panels, and compartments, but by far the most common is in the boot lifting mechanisms.

BACK DOOR ASSEMBLY

Back door outer upper panel
Back door outer lower panel
Back door inner panel
Hinge reinforcement LH
Hinge reinforcement RH
Gas Stay Mount LH
Gas Stay Mount RH
Wiper Mounting
Latch Reinforcement

Back Door Inner panel:

The inner panel consist of all the necessary embosses and the mounting positions of the gas stay, latch, and striker positions. At the time of impact, all the forces are directed at the hinges as shown.

Back Door outer panel:

The outer panel is hemmed along the edges of the inner panel creating corner reliefs wherever necessary

Hemming:

Hemming is done along the edges of the outer panel giving it strength and stability and thus providing corner reliefs whenever necessary so that the hemming doesn’t have a sharp bend along the bend radius thus creating bad surfaces.