Hood design-Week 2

AIM: TO DESIGN HOOD OUTER PANEL, INNER PANEL AND THE NECESSORY REINFORCEMENTS BY THE GIVEN MASTER SECTION AND DESIGN PARAMETERS.

DESIGN

MASTER SECTION IS A PREDIFINED SKETCH WHICH WILL BE ADAPTABLE FOR DIFFERENT SOLUTION

PARTS

1) OUTER PANEL

2) INNER PANEL

3) LATCH AND STRIKER SYSTEM

4) HINGE SYSTEM

HOOD THICKNESS

OUTER PANEL THICKNESS = 0.75 MM

INNER PANEL THICKNESS = 0.75 MM

OUTER PANEL

WE GET THE OUTER PANEL SKIN SURFACE FROM STYLE DEPARTMENT WITH PROPER AESTHETIC LOOK, GAP ETC. THE SHAPE OF THE OUTER PANEL IS MADE AERODYNAMIC INORDER TO MINIMIZE THE AIR EFFECT, SHAPE OF THE OUTER PANEL IS REFERRED AS A BASE TO A DESIGN A INNER PANEL.

INNER PANEL

HOOD INNER PART IS A FUNCTIONAL PART IN A HOOD DESIGN. IT GIVES STRUCTURAL SUPPORT AND STRENGTH TO THE OUTER PANEL OF THE HOOD. THE OUTER AND INNER PANELS OF THE HOOD ARE TYPICALLY ATTACHED TOGETHER USING A HEMMING OPERTAION AT THE EDGES.

LATCH AND STRIKER

THIS SYSTEM IS THE ATTACHMENT OF HOOD ASSEMBLY AND VEHICLE BODY. THE HOOD LATCH SYSTEM MUST BE ABLE TO CATCH THE STRIKER OF THE HOOD UPON CLOSING AND INSTANTENEOUSLY, AS WELL AS AUTOMATICALLY, LOCK. ONCE IN THE LOCKED STATE, IT MUST BE REMAINED IN LOCKED AND ONLY UNLOCK UPON THE OPERATOR'S CONTROL.

HINGE SYSTEM

THE HINGES ARE USED TO GUIDE AND HOLD THE HOOD WHEN OPEN AND CLOSE. HINGE ASSEMBLY CONSISTS OF TWO PARTS ONE IS CONNECTED TO THE HOOD INNER PANEL AND SECOND IS CONNECTED TO THE VEHICLE BODY.

REINFORCEMENTS

REINFORCEMENT ARE PROVIDED IN MAINLY INHINGE AND LATCH REGION. WHEN HINGE AND LATCH ASSEMBLIES ARE ATTACHED TO INNER PANEL, STRENGTH OF THAT AREA REDUCES LOCALLY SO WE ADD SOME ADDITIONAL MATERIAL TO INCREASE THE STRENGTH OF THE AREA LOCALLY.

LATCH TRAJECTORY

CIRCLE IS DRAWN FROM THE HINGE AXIS CENTER SO WE CAN FINALIZE THE POSITION OF THE LATCH STRIKER. FOR PROPER MATING, THE TIP OF THE STRIKER SHOULD BE TANGENT TO THE LATCH TRAJECTORY. THE POSITION OF THE LATCH STRIKER FOLLWS THE PATH OF THE CIRCLE.

EMBOSS DEFINITION

EMBOSSES ARE DESIGNED TO INCREASE THE STRENGTH OF INNER PANEL. SHAPE OF EMBOSSES ALSO DETERMINES THE DIRECTION OF COLLISION FORCE DISTRIBUTION. THE SHAPE OF THE EMBOSSES SHOULD BE DESIGNED IN A SUCH WAY THAT THE COLLOSION FORCES SHOULD BE DIRECTDE TOWARDS THE OUTSIDE OF THE CAR CABIN.

HEMMING

IT IS A SHEET METAL FORMING PROCESS INWHICH SHEETS ARE JOINED BY BENDING IT USUALLY TO 180°.

CORNER RELIEF

FINAL PRODUCT4

DRAFT ANALYSIS