Design of backdoor
Objective:
Use the provided styling surface to come up with a back door design, use appropriate design methodologies and provide the necessary reinforcements and embosses.
Software Used:
NX CAD
Backdoor Introduction:
An automobile back door or Tailgate is the panel that covers the boot (or trunk) of an automobile. It enables access to the main luggage compartment. A hinge allows the boot lid to be raised, while devices such as springs or gas cylinders hold it up in the open position The Backdoor is an assembly of many parts such as inner panel, outer panel upper, outer panel lower and Reinforcement. Inner panel is attached to the outer panel using mastic sealant.
Total no. of parts in Backdoor are:
- Back door outer panel (upper)
- Back door outer panel (lower)
- Back door inner panel
- Hinge reinforcements
- Gas stay reinforcements
- Latch and striker reinforcements
- Wiper motor reinforcements
INNER PANEL DESIGN:
Tool Direction:
OUTER PANEL DESIGN:
HINGE REINFORECEMENT:
WIPER MOTOR REINFORCEMENT:
GAS STAY REINFORCEMENT:
LATCH AND STRIKER REINFORCEMENT:
MASTIC SEALANTS:
DRAFT ANALYSIS:
Draft analysis is done to show that the Part can be easily drawn out from the mould.
So the above design has been analysed using the tool on NX CAD with having 8 degree as the allowance .
ASSEMBLY IMAGES :
HEMMING AND RELIEF:
Hemming is the process of joining two surfaces using set of rollers to bend the parent over the sub part. The brown parent part is the outer panel and white sub part is the inner panel.
Relief is done to decrease the stress concentration along the corners and also to decrease the clumping of metal along the corners, this is done by trimming the corner by a minimum radius for the rollers to pass along smoothly.
Conclusion
Thus the back door was designed from the given styling surface and Draft analysis is also done on the inner panel to check the manufacturing conditions. In this challenge i learned to design the Inner panel, the Outer panel, Wiper Motor reinforcement, Hinge reinforcement, Gas Gtay reinforcements, Latch and Striker reinforcement and its position.