Roof Assembly

Aim:

To creating the Master section and performing Design calculation of the roof.

Tool:

CATIA.

Links:

https://drive.google.com/file/d/13-JYc0Imrva-YZvolwhilKXU1-0Ldmdj/view?usp=sharing

https://drive.google.com/file/d/1HVd42DZsgchtdwmy5ss7Av4s7lDvp81h/view?usp=sharing

https://drive.google.com/file/d/1MOgBxtCMc8kJbpTwKsQHQQnF8q_HpOza/view?usp=sharing

https://drive.google.com/file/d/18imu0eIFXIlxqtfudQPXqWJTSaNWAizm/view?usp=sharing

https://drive.google.com/file/d/1YydTCQGe9DrPaBhWboAgkrnazKhu2sJi/view?usp=sharing

https://drive.google.com/file/d/1wEDj5KjCZS1Nsx8ebqUcTe2EqC9IU5bf/view?usp=sharing

https://drive.google.com/file/d/1Pgons1RjwtSJQxchGkeb44AQA0bgjn8s/view?usp=sharing

https://drive.google.com/file/d/1tRiACYPCo2pkZLJTNvbyn2ogXC0go6kn/view?usp=sharing

https://drive.google.com/file/d/11taCdIbaCfKvJW0iqD9tum_QLWyk2Abb/view?usp=sharing

Introduction:

An automobile roof or car top is the portion of an automobile that sits above the passenger compartment, protecting the vehicle occupants from sun, wind, rain, and other external elements.

Types of car roofs:

• convertibles.
• Hardtops.
• Sunroofs.
• T-tops.
• Targa tops.
• Vinyl roofs.

Master sections:

Requirements:

• Thickness = 0.75mm.
• Ditch area minimum flange width = 15mm.
• Welding and mounting areas must be flat.
• Tool opening angle =3degrees.
• Provide necessary reinforcement and mastic points.
• Visibility criteria FR and RR.
• Headroom clearance = 80mm.
• Providing space for the windshield and rubber sealant i.e, 3.7mm and 8mm respectively.
• Calculate the Heat distortion and Snow load criteria.

Parts to design:

• Roof (with the styling reference).
• Center Reinforcement.
• Bow roofs (as required).
• Ditch area.
• Front roof rail.
• Rear roof rail.

Roof:

Thickness = 0.75.

Minimum fillet radius = 3mm + thickness.

Ditch area:

The roof area is connected with the car body by the ditch area ( eg. A, B, C pillars).

Front roof rail:

Thickness = 0.75.

Minimum fillet radius = 3mm + thickness.

Rear roof rail:

Thickness = 0.75.

Minimum fillet radius = 3mm + thickness.

Bow roof rail 1:

Thickness = 0.75.

Minimum fillet radius = 3mm + thickness.

Mastic points are provided in order to give additional strength.

Bow roof rail 2:

Thickness = 0.75.

Minimum fillet radius = 3mm + thickness.

Mastic points are provided in order to give additional strength.

Center reinforcement (CTR):

Thickness = 0.75.

Minimum fillet radius = 3mm + thickness.

Mastic points are not provided on the CTR because there are two bow roofs provided with mastic points.

Assembly:

Heat Distortion:

Formula.

Values.

link: https://drive.google.com/open?id=1rFHT6PaXy0R58cofpPZR1C6iZ1j9nz-f

Snow load condition:

Formula.

Values:

Inertia calculations (ly)

link: https://drive.google.com/open?id=1CiO-sGBXs4nsEAecjNmr3Ikx5aC5Ogmd

Conclusion:

The results obtained from the curvature study of the roof we conclude that the roof is acceptable.