Hood design-Week 2
1.HOOD OUTER PANEL:
The outer panel is the part that theuppermost layer.The hood must be designed in such a way that it ensures the
safety of pedestrians along with the person inside thge cabin
2.HOOD INNER PANEL:
The inner panel gives the rigidity and strengthto the outer panel.We provide spaces for mastic sealent as other joining
tecniques might spoil the lock of the panel we provide respective embosses for the sticker and hinge
Mastic sealant:
Mastic is commonly used on constuction project as an adhesive and sealent it is a popular choice where
are surface needs to adhere to another in a durable bond or where are area needs to be protected.
The most common type of masterials mastic sealent can be adhered to include timber, aluminium,
steel,marbles glass and various types of board ,althought it can be used on nearly all materials.
3.EMBOSS:
Embossing and engraving have similiar effect a raised surface.but embossing pushes the paper or metal up.working from
behind,while engraving actually cuts into the surface ,cutting away a bit of the metal it makes its mark.
4.HEMMING:
Heming is the process in which the edge is rolled flush to itself.Hemming is a sheet metal forming operation in which the
edge of the sheet is folded back on itself.it several purposes to fastern two sheet metal parts to improve the apperance of
edges and to increse tte part stiffness
5.FRONT AND REAR RELIEF OF HEMING:
6.DEEP DRAWING:
Deep drawing is a sheet metal forming process in which a sheet metal blank is radiallydrawn into a forming die by the mechanical action of a punch.it is thus a shape transformation process with material retention.The process is considered"deep"drawing when the depth of the drawn part exseed its diameter.This is achived by redrawing the part through a series of dies.The flange region(sheet metal in the die shopulder area)experience radialdrawing stress and tangential comressive stress due to the material retention property.These compresive stress result in flange wrinkles(wrinkles of the first order).Wrinkles can be prevented by using a blank holder ,the function of which it is faciltiate controlled ofmaterials flow into the die radius