Hood design

Manufacturing Requirements:

While designing the inner panel hood that will be manufactured using the deep drawing process, there are some minimum requirements that we need to fulfil:

1. Minimum fillet radius = 3mm+Thickness
2. No sharp corners inside the component
3. No curvatures lesser than 5mm
4. Small embosses should not exceed the maximum depth of 6mm (staying on the safe side)
5. Mounting areas and welding areas need to be flat
6. Provide appropriate corner relief on the area of curvature.

Outer panel , Inner panel designs and Hemming:

Hemming is the process of joining both the outer and inner panel together. The hemming process roles and wraps the hood outer panel around the inner panel and holds it tightly together. The following are the dimensions followed for hemming.

After the hemming process is done, now we need to provide corner relief on the corners of the hood so that the part is manufactural.

Design and devolopment for reinforcemnents:

After the development of the entire inner panel for the hood, we need to develop some additional necessary re-enforcements. The Latch striker and the hinges will need a re-enforcement that needs to be developed. All the re-enforcements are made from sheet metal of thickness 1.5mm.

Positioning of Hings and striker:

To position the latch and striker effectively, we position the hinge and draw the hinge axis. Now, using the hinge axis as the center we draw a big circle to the position where we need the latch to be placed. Then, we draw a tangent line to the circle at that point and place the latch in that region.

Assigning provisions and definitions of mastic datas:

Detailed report on mastic sealant positioning and Emboss designs:

The Mastic sealant or the Mastic point is an elastic compound that behaves like a rubber. The mastic points are defined on the hood inner panel where the hood can easily deform. They help the hood outer panel to come back to its original shape after it gets deformed. The mastic has an influence area of 80mm.

Emobosses are usually provided in order to improve the strength of the component. The component will be strengthened based on the master section. When a force impacts the hood from the front, it travels in an upward direction. The component is designed to divert the force away from the passengers into the hinges, as shown in the image.The embosses in the inner panel are made according to the diversion of the load path. The emboss depth is kept at a maximum of 5mm to be on the safer side so that the part is manufacturable.