Design of backdoor

OBJECT:-

To Design the outer upper and lower panel, inner panel with the necessary reinforcements by following the Master section with the design parameter for the given class A surface.

INTRODUCTION:-

Back doors are one type of the door of vehicle which are located next to the passenger seat,which provided the access of luggage compartment.these back door in most of car operated by gas stay,which in turn reduces the effort required to lift open the door. Some luxury cars have powered backdoor which in turn is driven by an electric motor. This kind of system is also called a powered trunk lid system. the back door designed should meet the safety requirement for the rear collision.

GAS STAY:- The mechanism like piston-like hinges that support the lid either side. They're called gas stay.

SEALING FLANGE: Sealing elements installed between mating flange faces. The compressive force applied when flanges are mated keeps the Sealing in position between the two flanges.

Components to create:

1. Outer Upper Panel.
2. Outer Lower Panel.
3. Inner Panel.
4. Gas Stay Reinforcement LH And RH.
5. Hinge Reinforcement LH and RH.
6. Striker Reinforcement.
7. Wiper Reinforcement.

METHODOLOGY:

Firstly we get Class A surface we give join command, If some patches are coming then repair Surface Then we get final Repair class A Surface

- Then creating Tooling Axis

INNER PANEL:-

First offset the surface to a distance of 1.7mm, which will give the innerpanel surface position.Now the sealing flange for the inner panel has to be created.The seaing flange created by cuttng from the surface is shown below

This flange has to be in a depth of 30 mm from the surface Now connect the flange with the surface using law extension w.r.t the tooling axis and proper draft given.Fillets has to be applied at each steps and check whether the surface is getting thickened or not.The next step is to create the other side which has to be connected with the sealing flange Similarly connect the lower side of the surface by creating a surface and sew it all together.

A mastic sealent is used on the surface to connect the inner and outer panel with a gap of 5mm. and all embosses are create

All reinforcement:-

OUTER PANEL(upper and lower):-

Offset the surface 2.65 indown side so the .2 mm of clearance given the to the surface. make a surface for hemming and use tritagengt and sweep.

Relief has to be given to the corner to easy of manufacturing.