Design of backdoor

Objective:

1)To create Back door design from given class A surface .

2) To provide reinforcements and emboss wherever required

Introduction:

A car door is a type of door opening, typically hinged on its front edge, but sometimes attached by other mechanisms such as tracks, for entering and exiting a vehicle. Doors most often integrate side windows for visibility from inside the car and can be locked to secure the vehicle.

Car doors may be manually operated or with power assist supplied by the vehicle. Powered doors or power doors may be found on minivans, luxury vehicles or modified cars. 

Backdoor or tailgate typically consists of an outer panel and inner panel both made of sheet metal .

While constructing or designing these panels,we need to consider the following factors

a) Rear Visibility

There should be enough visibility for the driver through the backdoor

b) Draft angle for sheet metal manufacture

Minimum draft angle of 7 degree should be provirded inorder to make the component manufacturable

c) Latch and striker allignment

The latch should follow a circular motion from the hinge axis to ensure it alligns with striker

d) Reinforcement for hinges and gas stay

Emboss should be provided to strengthen these areas

e) Relief for hemming

Reliefs should be provided at corners

f) Boot space

Design should be done with idea of provoding maximum boot space available

Procedure :

Given outer panel

Inner panel created from offsetting outer panel

After making inner pannel,we do hamming

 

Inner panel created from offsetting outer panel

Reinforcements for hinges and gas stay

Creating the tooling axis :

The tooling axis is created first, to make sure the part is producible in drawing operation and the other is to use this axis for the sweeping operation of the inner panel sidewalls.

• Click on the line option and select the Bisecting option.
• Draw 1 Line by selecting the point from the Vertex of the Upperside of the corner to the position where the declination starts. Click ok and the line is created.
• Now create the second line and follow the same procedure but from the lower surface. Click Ok and the line is created.
• Then draw a line using bisecting select line 1 and line 2 to get the final line.
• The line created is the main tooling Axis.

Draft analysis:

Complete assembly of outer and inner panel