Design of backdoor
Aim:
Using the provided styling surface to come up with a back door design and using appropriate design methodologies and make the necessary reinforcements and embosses .
What is a back door?
A door is a hinged part which is used for entry and exit of the vehicles. Back doors are one of the type doors of the vehicle which are located next to the passenger seat which provides access to the luggage compartment. In most of the cars, these back doors are operated with the help of 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. Hatchback or station wagons are sold as 3 door or 5 door models. In this case, the rear hatch is classified as door this is because it enters the passenger compartment. The naming is mainly used in Europe countries. In case of safety, the back door designed should meet the safety requirement for the rear collision.
Types of the back door based on working positions.
The door or opening of a cargo area may be hinged at the top, side, & bottom. If the door hinged in the bottom it is called as a tailgate.
Top-mounted:
This type of back doors is used in a station wagon, pickup truck and some of the sport utility vehicle
Today’s modern cars use top-mounted tailgating systems which are both powered and also gas stay supported. These top mounted tailgates provide greater rear visibility compared to side-mounted or bar doors which have canter pillars in it.
Side Mounted Doors:
As the name signifies side-mounted doors are the one which is used in the van type MPVs, SUVs, pickup truck vehicles. These side-mounted doors or barn doors are a lot easier compared to top-mounted doors.
These doors are generally smaller in size and can be easily accessed. These doors are more convenient for the goods handlers for long pipe and lengthy components where one door is kept open. These doors also save accidental head impacts. It is a lot easier to load and unload items in the side-mounted doors.
Bottom / split type:
This bottom type or split type backdoor system are used in the car type such as estate type car, pickup trucks and some luxury SUV s.
These are the most convenient type of back door in which the bottom split is used as a support or even as a table for the tour going people.
Inner Panel
Outer Panel Upper / Lower
Hinge Reinforcement LH / RH
Gas Stay Reinforcement LH / RH
Wiper motor reinforcement
Latch Reinforcement
Plastic Trim
Design Intent:
The intent of his project is design the BIW back door of the vehicle by following the engineering standards and manufacturing requirements which satisfies the deep drawing process.
Deep drawing is one of the most widely used processes in sheet metal forming. Apart from its use in many other sectors, it is applied in the automotive industry for the manufacturing of car body parts.The deep drawing process is a forming process which occurs under a combination of tensile and compressive conditions. A flat sheet metal blank is formed into a hollow body open on one side or a hollow body is formed into a hollow body with a smaller cross-section.
Deep drawing processes are divided into three types:
Deep drawing with tools
Deep drawing with active means
Deep drawing with active energy
In the automotive industry, deep drawing is usually carried out using rigid tools.
Design Consideration:
Rear visibilities for safety and functionality
Support structures like hinges and Gas stay/ Power lifter
Rear crash regulations
Boot space
Mounts for wiper motor and lights
Strength criteria
Draft analysis
Inner Panel:
The inner panel is a component which is used for strengthen the door assembly and it is one of the most important components on which all accessories are mounted like hinges, glass guide channel, molded trim, latch etc. the possible method is the integration method. In the integration method, the part is stamped out of a single blank. This reduces the number of tools needed, the assembly cost and eliminates any fit ability problem.
Outer Panel Upper/Lower:
The outer panel of the back door is similar to the other BIW components where it is the aesthetic part of vehicle. The coating provided is of multi stage which has the property of scratch resistance, rust prevention and smooth and attractive finishes. The outer panel also has the provisions for the tail. Lamp, rear fog lamp and also has the provision for license plate mountings. Most of the hatchback cars have the provision for wiper motor.
Upper Outer Panel
Lower Outer Panel
Backdoor Assembly Design in NX:
Conclusion:
Thus the design of BIW Fixtures of a Backdoor of a car has been designed using NX-CAD.