Design of Car Backdoor

Backdoor of a car is aso called tailgate. A car backdoor consist of inner pannel, 2-3 outer pannel & reinforcements. Car backdoor is mainly made of steel or aluminium based on the budget of a car. The inner pannel consist of hinge reinforcement, gasstay reinforcement, latch and striker reinforcement & wiper motor housing. Using aluminium improves the strength of the parts as well as reduce the weight of the backdoor& also we can vary thickness in the aluminium parts due to which we can avoid the reinforcement. The only drawback is the cost of aluminium. For steel parts we cannot vary thickness of the parts and theses parts are stamped & more number of parts are added which in turn increse the weight of the backdoor.

Reinforcement :

Reinforcements are the one which is additionaly given on the parts to improve the strength locally. The thickness of the reinforcement usually vary from 1-1.5 mm.

Pannel thickness vary from 0.65 - 0.75 mm.

Important consideration in designing backdoor :

• Rear visiblity criteria.
• Lugguage volume.
• Hinge and gasstay reinforcement.
• latch and striker reinforcement.

Link :

https://drive.google.com/open?id=19-gf5UVqpRyZQEkuVRfTzfLtLrkqVXgg

Inner Pannel & Reinforcement :

1. Hinge Reinforcement
2. Gasstay Reinforcement
3. Middle Reinforcement
4. Latch & Stricker

Outter Upper & Lower :

Hemming :

Draft Analysis :