Challenge

Week 11 - Project - A pillar Design with Master Section

TTom Thankachan20 Apr 2023

A pillar Design with Master Section

AIM:

Design A PILLAR from the given master section and CLASS A surface,create the tooling axis and perform the Draft analysis for the final solid part

Given CLASS A surface

Tooling axis creation

The tooling axis is created by line bisecting method.

The two curves from master section are extracted and converted into parametric by isolating the sketch and defining it with the current horizontal and vertical axis.

The using the lines for bisecting and a point the tooling axis is created.

Class B creation

The thickness of the component as 2.5mm. Now we need to create a B surface which will be similar to the A surface at an offset distance of 2.5mm, there are some discontinuities happened while offsetting the CLASS A surface, so we need to repair it to form a closed boundary by using the multisection surface tool.

Class C surface

C surface is created with help of A-Surface by extending the edges of Class A using the Sweep(with reference surface)at angle of 3 degree and Draft direction separately,we may create multiple sweeps to get class C surface, finally joined all sweeps together to get the final Class C surface.

To get the final closed surface, join Class A with Class C and trim with extrapolated class B surface

Class A,B,C

Solid body from closed surface

Draft analysis

Required draft angle for part body is 3 deg

Creation of dog house

Dog house is an engineering feature used in plastic design. Dog houses are used as support feature. Sometimes other engineering features like snaps, locators, screw bosses are mounted on them to increase their strength.

Dog houses are subjected to draft analysis to prevent breakage of the component during ejection from the mould cavity. Dog house and other engineering components are built on the B-surface

Dog houses are designed to avoid SINK MARK created on the CLASS-A surface by screw bosses and to solve the length issues when giving screw bosses which need to be assembled to other components.

It is also useful when perpendicular screw bosses are required on the part to the tooling direction.
Make a rectangle to enclose the screw boss in it but make sure it is open from one side.
Sweep it with tooling axis as the pulling direction inwards.