Design of backdoor

Design of backdoor

Aim: To design and do the draft analysis for the Back door and give reinforcement for strength using the software Nx-CAD.

Objective: To design and develope the backdoor from class A surface to create the Backdoor Inner and Outer panel and also give reinforcements to the Hinge,gas stay, latch and wiper motor.

Introduction:

• The area in the back of an automobile that provides access to the trunk is known as the back door. The Wiper Motor, Gas Stay, Tail Lamp, Latch and Striker reinforcements and additional weights are also supported by the back door.
• One of the closing products in BIW sheet metal design is the backdoor/tailgate. There are several parts within the backdoor, and it is made to readily include them. The baggage space and rear visibility are impacted.
• The kind of material used in door construction depends on the vehicle's performance and price range. Low-cost automobiles employ steel instead of aluminium, which makes the production process simple and economical since it uses the stamping of moulds.

DESIGN CONSIDERATION FOR BACKDOOR INNER PANEL:

1. Rear Visibility.
2. Support structures like hinges and gas stays.
3. Mounts for wiper motor, tail lamps, and other wiring loops.
4. Fit and clearances.
5. Boot space
6. Rear crash regulations and requirements.
7. Sealing and its functions.
8. Joining techniques like hemming, spot welding etc.

Backdoor parts thickness value used in this design:

1. Outer panel - 0.75 mm
2. Inner panel - 0.75 mm
3. Reinforcements - 1.5 mm

Major Parts and Reinforcements:

The backdoor consists of the following basic components:

1. Backdoor Outer Panel (Upper)

2. Backdoor Outer Panel (Lower)

3. Backdoor Inner Panel

4. Hinge Reinforcements (LH & RH)

5. Gas-Stay Reinforcements (LH & RH)

6. Latch and Striker Reinforcement

7. Wiper motor Reinforcement

Components of Backdoor:

Outer panel:

some areas are not thickning due to the fillets and solving those issues using design methods.

Outer panel upper:

Outer panel lower:

Inner panel:

Hemming:

Relief

Hinge reinforcement LH and RH

Gas stay reinforcement LH and RH

Wiper motor reinforcement:

Latch reinforcement:

Draft Aanalysis:

Taking tooling axis as a vector

Final Images

Conclusion:

Hence the body is created using Class A input by giving the thickness 0.75mm and created reinforrcement of thickness 1.5mm uisng all the engineering and design criteria.