Design of backdoor

Aim : To design car Back Door upper & lower Inner panel, Wiper mtor reinforcement, Hinge reinforcement, Latch-striker reinforcement, Gas stay reinforcement using given Styling surface of Back door upper & lower outer panel.

Software to be used : NX Cad

Back Door Introduction: A backdoor is located at the rear end of the car which gives access for the boot space to store luggage,spare wheel etc. These doors can be operated manually or electric powered. In most of the luxury car electric powered back door will be used.

- The materials used in making the backdoor of te car is mainly steel but nowadays Aluminium is also used in making the panels.

- The main advantage of Alluminium is that the density of Aluminium is very less compared to steel so it reduces the overall weight of the car. Aluminium is costlier than steel this is why still many companied not shifting to the same or they will introduce in luxurious / premium models only where cost can be negligible.

Types of Back Door :

A. Top Mounted : This type of back door used in sedan, sports cars, pickup truck and some of the sport utility vehicles.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 compared to side-mounted or bar doors which center pillars in it.

B. Side Mounted : At the same signifies side-mounted are the one which is used in the van type MPVs, SUVs vehicles. Tese side mounted doors are a lot easier compared to top mounte doors.These doors are generally smaller in size and can be easily accessed.

Raw Material Comparison :

Deep Drawing Process : The metal deep drawing process is an effective method of manufacturing of cups,cans and other similar deep drawing products.

A. First - Stage drawing : The blank shape of metal is placed on the die and contact with the punch. When the metal specimen is flat piece of sheet metal used in foaming and fnish the product.

B. Redrawing : The components drawn from first stage again it is rdrawn convert into more depth to form a cup shape in the die and punch. The second stage of drawing is called as redrawing.

Let's proceed to design Car Back door Inner, Outer and it's reinforcements.

1. Outer Panel:

2. Inner Panel :

• Using NX Cad software, I have designend Car Back door Outer & Inner panel with its reinforcements as mentioned below.

3. Tooling Axis and Design Direction of inner panel :

• To design in the Tooling direction of operation during production, We need to design the inner panel according to direction.

4. Inner Panel Reinforcements :

• Reinforcements has to be implement to improve strength of particular area where we implemented any assembly attachment.

A. Hinge Assembly Reinforcements :

B. Gas Stay Reinforcements :

C. Wiper Motor Reinforcements :

D. Striker Reinforcements :

5. Latch - Striker Trajectory :

• Latch - Striker Trajectory used for placement of Striker holder and Striker according Hinge axis to smooth and perfect play or open/close the back door.

6. Hemming Operation :

A. Outer upper panel with rest area:

B. Outer lower panel hemming with rest area :

• Hemming Section View :

7. Draft Analysis :

• To be done along with vector - Punching or Design Direction
• Need to redesign after result of draft analysis if needed according to color as displayed.