Challenge

Week 8 - Challenge 4 - Bumper

VVinoth S8 Nov 2022

Aim:

Create the Bumper Plastic component through the given Class-A surface. To begin with, the tooling axis for the given Class-A Surface should be created meeting the requirements of the draft angle and at the end perform the Draft analysis on the model.

Take the Thickness of the component to be 3 mm

Class A Surface -

TOOLING AXIS CREATION: Generally tooling axis is created using bisecting line method. But in the components where it has a number plat area, then the tooling axis is considered as a line normal to the base surface of bin. Same is done with this component. A line normal to base surface is created and considered as tooling axis.

Class B Surface Creation-

To create Class B Surface first Extract The class A surface using 'Multiple Extract' command. Then Offset The extracted surface with propere distance and direction(Downerd), where distenmce is nothing but the thickness value of the part. In this case some part of the surface might not be offseted. For those areas we have to use 'Multi-Section Surface' & 'blend' command with proper edge and guide curve and have to create those areas. Sometimes it might need to extract that perticular area of surface and then follow the same process to create the surfacxe.

Class C Surface Creation-

What Class C Surface does, is join the both Class A & Class B Surface. So to create the Class C Surface, first create boundaries using 'Boundary' command with using edges of Class A Surface. And then create a surface using 'Sweep' command at a angle of 90 deg. with class A Surface using those boundary. It might create error when try to make sweep with one single boundary of Class A Surface edge, so for that case we have to take several boundaries according to fisabilioty. And then trim those sweep surfaces with class B surface to make sure there is no excess surface beyond class B surface. So my final Class C Surface was-

Final Closed Surface-

After creating all surfaces, join them togather using 'Join' command. And my reasult is-

Draft Analysis-

Draft analysis is a most importent thing for a part body design. Its reasult says that the perticular body is manufacturable or not. Even it also analise that how simple or complex will be the manufacturing process. So to do that analysis first we have to create a tooling axis that will be along the movement of mould open and close axis.

Draft analysis for class A: