Hood design-Week 2
HOOD DESIGN:
AIM :
TO DESIGN OF CAR HOOD WE HAVE TO UNDERD STAND MECHANISIM , SAFTEY FEATURES & SPECIFICATIONS
AS PER THE DESIGN STANDARDS.
STEPS TO DESIGN HOOD:
1. DESIGN OUTER PANNEL FORM SYTLING DEPARTMENT.
2. DESIGN INTERNAL PANNEL THROUGH OUTER PANNEL.
3. MAKING EMBOSSING & REINFORCEMNET .
4. GIVING MASTIC DATA.
5. DETAIL REPORTING OF DESIGN DATA.
Data to be used:
Hood Thickness Information
- Outer Panel Thickness = 0.75mm
- Inner Panel Thickness = 0.75mm
- Reinforcement Thickness = 1.5mm
INTRODUCTION:
Hood is front portion of the car . it is design to aero dynamics to reduce the air effect around the car. and also resists the engine compartment. it also adds luxirous looks to car.
PARTS OF AN HOOD:
Genraly hood assmebly has i) internalpannel.
ii) outer pannel.
iii) reinforcenment & emboss.
iv) latch & stricker mechanisim.
Type of hood supprots:
1. GAS STAY:
spring stay are designed to lift upwords of the doors.in it once door open slightly spring will push to fully open positon. it is a euro fit stock it will varry depsinging up on the door size and requrimnet. its mostly used where thw door weight is heavy.
2. SUPPORT ROD:
Its a most widly used in cars besauce its very easy and cheap. its mannual lift of doors by ourselves and palce the supprot rod inthe space provided eihter in hood or engine compartment.its used where the door weight is light.
INNER PANNEL:
Inner pannel is offset of outer pannel. its a support of outer pannel.it consists of different embossing and holes positions.it has cappable to handle the forces during impact. so we need to desgin the inner pannel. embosses provide to transforms energy to hinges.
OUTER PANNEL:
outer pannel is a cover of inner pannel.it is a part which give a luxirous look to car. outer pannel and inner pannel is is not join by spot welding process or revit, which will spoil the outer pannel.
EMBOSS:
Embossing is stamping process for producing rasien or suken design or relif in sheet metal. The geometry is created on the master section . After perfoming the intial stages of design , we will provide local ebmoss to strengtneth the compenent. these emboss will transfoms the forces upword direction and away from the passangers when the impact time.inner pannel is designed accordingly to load path. emosing depth is maxium of 5 mm depth.
MASTIC SEALENT:
Mastic point is elastic compound . it helps to come back the outer pannel to its orginal shaoe after the deforms. masteic points has influence the aresa of 80 mm.
HEMMING :
Hemming process is joining of outer pannel and inner pannel. hemming process is raps and role the outer pannel towards the inner pannel to hold tightly together.
LATCH:
Latch is also known , as sticker is a locking mechanisim to closing the hood. the placement of sticker is determined by the drawn of circle with the pivotal axis of the hinge as it center. this is called as latch trajectory.
LATCH TRAJECTORY:
Its path of stricker will follow when the hood opening or closing with respesting to the poviting hinge aixs. the sticker is placed 90 degree . such that it is tangent to circle.
