Week 10 - Challenge 3 - Door Trim Lower with Engineering Features

Door trim, Heat stake & Locator Design

Aim:

To design the Door trim plastic component by using A surface and create the ribs and screw boss by using design rules and the do the draft analysis on Door trim.

Objectives:

· Create a tooling axis by using intersection lines.

· Creation of class B surface by using extract and offset.

· Creation of class C surface by creating sweep from A surface and extrapolate from B surface.

· Creating a solid part by using of close surface.

· Creation of Heat stake with design rules.

· Draft analysis of Door trim.

Introduction:

A Door trim is a part of an automotive door. Every plastic components have a A,B,C surface. A surface is the basic surface. By using the A surface only, we can design the plastic components. B,C surface creating only by using of A surface. Tooling axis is very important to design a component. For draft tooling axis is essential. For C surface creation from B surface the sweep created by use of tooling axis. Heat staking is a process which utilizes pulsed heat to join two or more parts together where at least one part is made out of plastic. It works by heating a plastic part to just above the glass transition temperature while simultaneously applying force so that it is deformed.

Parameters:

Thickness of component -- 2.5mm

Draft angle of component – 3^o

Draft angle of heat stake and locator – 0.5deg

Class A surface:

This picture shows the class A surface. First, we need to check the boundary. If it is not okay, then A surface needs to be modified.

Tooling Axis:

Tooling axis needs to be created by using of A surface by using intersection lines by bisecting method.

Draft Analysis of Class A surface:

Draft angle – 3deg.

Class B surface:

This picture shows a class B surface. This was created by extract and offset the A surface and splitting the extract surface. Finally extrapolate the component for making closed sheet to make solid.

Class C surface:

This picture shows the class C surface. This was created by use of creating sweep from A surface and trim with the B surface.

Four way locator:

Two way locator:

Heat stake:

Solid Door trim Component with heat stake & locator:

Draft analysis of a Door trim: