Hood design-Week 2

HOOD DESIGN:

                        A hood design is a assembly which includes a hood outer pannel,inner pannel,striker,hinge assembly and hinge reinforcements.

HOOD CONSIDERATIONS:

                                   While making a hood design one should be aware of the material selection,It's thickness,it's strength and the wrap around distance of the hood.

LATCH TRAJECTORY:

                             A latch trajectory is a circle created by taking the hood's inner pannel cetre as the reference and making a striker to make it to align parallel to the hood inner pannel's striker emboss.A striker is created inorder to lock the hood to the lower engine compartment of the car.

MASTIC DATA:

                     A mastic data is a glue type spot which is circular used to attach the hood's outer pannel to the inner pannel.A mastic spot occupies a space of 5mm radius and when it expands it provides strength to 80mm radius.

EMBOSS:

              A emboss is a structure which is used to provide strength to a component.In hood design we make emboss inorder to divert the forces coming inwards the inner pannel of the hood.We make required amount of emboss inorder to ensure the safety of the persons sitting inside the cabin as well as the safety of the pedestrians.

MANUFACTURING PROCESSES:

                                             There are a few processes in manufacturing a hood like deep drawing and hemming

DEEP DRAWING:

 

 

Deep drawing is a sheet metal forming process in which a sheet metal blank is radially drawn 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 exceeds its diameter.

HEMMING:

                In joinning hood's outer pannel to the inner pannel we mostly use hemming process as it won't damage the aesthetic appearance of the car.In this process we create a  hemming flange which bends and rolls the outer pannel to the inner pannel.We also make a relaxation to the curves bending at the edges.