Hood design-Week 2

OBJECTIVE

Making of Hood Assembly by using the Nx CAD software

OUTPUT

The hood assembly consists of -

• hood inner panel
• hood outer pannel
• striker
• hinge assembly
• reinforcement material

Hinge assembly, striker and outer surface of hood outer panel is given already.we have to create the outer panel,innerpanel and reinforcement material.

Inner panel

The inner pannel is created according to the master section given in question.so we created the following surface.

Next we created emboss to increase the strenght of the material.Inside emboss some surfaces is removed to reduce the impact during collision for humans.

Next thing we create emboss to hold the hinge assembly for the movement of hood.Since the surface of hinge assembly is plane we cannot create the emboss face as the surface of hood panel.so we make the face of emboss as a datum plane incline with x axis at an angle 7 degree.Thus we got the emboss for hinge assembly as like this.

After that mirrored the half of hood to create full surface,then we assembled one hinge assembly on emboss using touch assembly constrain and axis of hinge assembly parrallel to the x axis of the datum axis.other hinge is mirrored with yz plane.

The axis for movement of hood is created by drawing a line is connecting the centre of hinge cylinder region and for placing the striker a circle is drawn in zy plane with centre touching the axis of hood.A tangential line is drawn on the perimeter of the circle nearly to the striker to be plaved region.The striker is also having a line in yz plane normal to the face of striker.

These tangential line and line drawn in striker is aligned.The face of the striker facing the surface of emboss is extraced using wave geoemtry and make sure it is not linked with parent body.the emboss for striker is created by using surface region as extracted striker face.Then we thicken it. So we get this inner pannel surface.

outer pannel

The outer surface of panel is offseted by following the tolerance and thickness of the inner panel.The offsetted distance is 2.65 mm.The offsetted surface is trimed using 6mm offsetted inwards from the boundary by keeping the outer region neares to boundary.Using law extension the outer boundary surface region is created and face trimmed to create the outer panel.

This edge region of the hood is made to this by trimming.the trimming curve is created by offsetting curve 3mm inwards the surface and joined with boundary of offset surface using curve on surface tool.

Then it is mirrored and thickened.

reinforcement material

The reinforcement material is created by extracting hinge emboss region and striker emboss region and thickening it for 1.5 mm thickness.This reinforcement material is used to give strengthen during joining by using nut and bolt.