Week 8 - Challenge 1 - Base Bracket Design
BASE BRACKET
This report demonstrates the complete design of an Automotive Plastic Component – Base Bracket from a given Class-A surface as an input.
Note:
- Thickness of the component is 2.5 mm.
- The component is designed using CATIA P3 V5-6R2021
OBJECTIVE
The aim of this Project is to create the Plastic component BASE BRACKET from Class-A surface along with creation of TOOLING AXIS. In the end DRAFT ANALYSIS has also been performed.
INTRODUCTION
TOOLING AXIS:
The line along which the mold (CORE and CAVITY) opens. It decides the direction of two mold half opening or closing. The component should clear the tooling axis in the given specific direction. As a general rule, along tooling axis we must we able to see maximum faces of the component.
There are different methods to create tooling axis. It depends
- According to the given surface geometry (face symmetry, surface normal, assembly
direction etc) - Already given direction in input (by customer)
DRAFT ANALYSIS:
It is a tool that allows the designer to check in advance whether the part they are designing can be removed easily from the mold being used to make it. A functional part for injection molding must have draft angles that face both the cavity and core sides. This will reduce the risk of damage to the parts and ensure that part can be ejected from the mold easily. When the draft angle is provided the sticking tendency of the part during removal becomes minimum because as the part ejects contact between surfaces breaks which leads to the reduction in friction and easy removal of the component.
Generally a 3 degree draft angle is recommended on the surfaces and 0.5o on ribs and screw bosses.
PUBLICATON:
Publication is used for easy access of the surfaces or components to work or view them.
PROCEDURE TO CREATE THE TOOLING AXIS
If the component is symmetric about one or more plane then bisection method is best
suitable. The procedure is as following:
For the given surface the tooling axis has been created using bisection method. Refer the following diagrams
Inserting a point and a line (dummy tooling axis) through it
CREATION OF CLASS-B SURFACE
By using offset, fill and join features class-B has been created.
CREATION OF CLASS-C SURFACE
By using extract, boundary, smooth curve, sweep, multi-section surface, trim and join features class-C has been created.
CREATION OF CLOSED SURFACE
By using trim feature closed surface has been created.
CREATION OF CLOSED BODY
By using insert body and close surface feature closed body has been created.
PROCEDURE TO PERFORM DRAFT ANALYSIS
