Design of backdoor

BACKDOOR DESIGN

Objective:

• To create the back door inner panel, outer styling panel with Hemming and reinforcement using NX software with the help of the styling surface provide.
• Introduction

• Back door of the car is also known as Tailgate. This is a critical part for back impacts occur on the accidents, which should be ensure that crash wouldn’t injured the passengers. Back door consists of one inner panel and two outer panel. Most of the time the back doors are made from steel or aluminum based on the budget of the car the materialis selected. In case of the aluminum the strength of the back door would be stronger therefore reinforcement are not required indeed which will reduce overall weight of the part. But aluminum a bit expensive than steel.
• Reinforcement

• It is an extra part given to the module for improving the strength/compensate the loss locally. These parts could be made from outer body scraps. Thickness could usually vary from 1~1.5mm.
• Criteria for designing the Tailgate
• Rear Visibility Criteria
• Luggage area
• Hinge And Gas stay reinforcement
• Latch and Striker reinforcement
• Thickness for panel vary from 0.65~0.75.

• Inner Panel:

In above figure on the left larger hole is used to mount the latch and striker actuator, there are the mounting points given for it. In middle there is space for the wiper motor assembly to be place and on the right there is hole is given as a symmetrical design and weight reduction. Thickness of the inner panel is 0.70mm. Rear visibility is maintained as per the styling panel

• Embosses:
• All embosses are made to give extra strength to the component. Embosses are placed in such a way it dissipates the force that occur in collision towards corners. Which makes the passengers more secure and safe. And cut the unwanted sheets for the components to reduces weight and gives space to accessories to be mounted.

Hinges:

• Hinges regions are emboss on the component. This would improve the strength around the area. On top two hinges for the back door to mount to the body and one in either sides for gas stay mounting points.

Outer Upper Panel:

• Based on the styling panel the outer upper panel was designed. Giving it to wrap on by hemming around the inner panel to protect as well as it is outer most part to avoid the joints hemming is used.

• Conclusion
• Here the back door is designed as per the requirement and maintaining the passenger safety and security while designing. All parts are geometrically aligned well.