Design of backdoor
OBJECTIVE:
Design of the Outer upper and lower panel, inner panel, and the necessary reinforcements by following the Master section with the design parameters for the given class-A surface.
Introduction:
A passenger car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor. Tailgate is the closing door of the luggage compartment. It provides the aesthetic outer appearance to the vehicle as well as wind flow aerodynamic surface. Tailgate is a single stamped or split outer panel. It integrates with the inner reinforcement panel. To avoid air rushing noise as well metal rubbing noise, protected with the sealer application process. Outer edges hemmed by Robot hemming process with 3 pass hemming to ensure sealer fill rate uniformly as well clinch tightness rigidly. in such a way easy to open at the same time, it should not pass external environmental noise inside the passenger compartment and should not lead to any water leak. High closing effort leads to improper locking. Gas Stay is used to easily access opening and closing.
TAILGATE OR BACK DOOR:
A tailgate is a door at the back of a truck or car, that is hinged at the bottom so that it opens downwards.
The Main Parts of the Back Door:
1. Outer Upper Panel.
2. Outer Lower Panel.
3. Inner Panel.
4. Gas Stay Reinforcement Left and Right
5. Hinge Reinforcement LH and RH.
6. Striker Reinforcement.
7. Wiper Reinforcement
Design Considerations for Back Door:
Functional Requirement: Hinge and gas stay are Functional Requirements
Striker Position:
The position of the hinge should be perpendicular to the latch when the latch and striker meets. for that, a circle is drawn from the center of hinge axis to find the path of the striker. and positioned it perpendicular to the path.
Rear visibility criteria: Federal motor vehicle safety standard (FMVSS) No. 111, “Rear Visibility,” currently requires that vehicles be equipped with rearview mirrors to provide drivers with a view of objects that are to their side or to their side and rear.
Rear crash regulation.
Requirement of sealing and its function: In order to prevent water from entering the cabin we are introducing a sealing area where the sealing flange is provided on the inner panel and rubber mounting area is provided on the body side.
Joining techniques: To join inner and outer panels the Hemming process is used and to join outer upper and lower panels laser brazing welding is used.
Hemming: Hemming is a forming operation in which the edges of the sheet are folded or folded over another part in order to achieve a tight fit. Normally hemming operations are used to connect parts together, to improve the appearance of a part, and to reinforce part edges.
STYLING SURFACE:
INNER PANEL DESIGN:
While designing the inner panel the consideration for its design are Thickness, the gap between the outer panel, and embossing.
The nominal thickness of the inner panel is 0.75.
The clearance gap between the inner and outer panel is 0.2mm
embosses of the inner should follow the force dissipation criteria.
Draft Analysis
Tooling Direction
In part design, use a thick surface option to make a sheet, here 0.75mm is the thickness of the inner panel
Outer Pannel
Inner Pannel
Final Draft Analysis
