Inner Panel BackDoor

                                     INNER PANNEL OF A BACKDOOR

The backdoor of a vehicle is also known as the tailgate. It consists of one inner pannel and two to three outer pannel. The materials used for the constrcution of backdoors are steel and alluminium based upon the budget of the vehicle

The parts made from aluminium are generally lighter and can withstand huge amount of collision force and also as it requires less reinforcements so the aluminium parts are lighter compared to steel parts. Moreover we as designers can vary the thickness of AL parts from palce to place. The only drawback alumunium parts are having is that by using aluminium we are drastically increasing the price of the cost of production of the vehicle thereby effecting the market value of the product.

Steel parts are generally heavier as they require more no of reinforcements and are stamped sheet together. But they help in reducing the production cost. 

In today's date more and more number of manufacturers are shifting from steel to alluminium parts as the demands for lighter vehicles are increasing compared to a reasonable price.


It is provided on a part to improve the strength/compensate the loss locally. The thickness of the reinforcements vary from 1~1.5mm where as the panel thickness vary from 0.65~0.75 mm

Important considerations in designing backdoor

  • Latch and striker reinforcements
  • Hinge and gas stay reinforcements
  • Luggage area

The inner panel of the backdoor is provided with necessary embosses and holes. The direction of the embosses is given in such a way the collisional force is always directed towards the otward direction away from the body of the car.  Excess materials are removed to reduce the weight and a hole on one side and a slot on other side is provided to effectively hold the  jigs and fixtures when positioned from the carline.

NOTE : Diabolic embosses are provided on the more curvy surfaces for the ease of the tool during machining process and hinge region embosses are provided to give strength. 

Below is my attached report of Darft Analysis :

Also I have attached my model along with the zip file attachment.



Projects by ankur sonowal

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  Below is the attached file of my complete hood deisng completed with the help of Nx cad . Read more

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The End