Week 8 - Challenge 1 - Base Bracket Design
BASE BRACKET DESIGN
AIM:
The main aim of this challenge is to create the Base Bracket Plastic component through the above-given Class-A surface, by giving the 'Tooling axis' and 'Draft analysis' to the class-A surface of the base bracket.
CLASS-A SURFACE:
TOOLING AXIS:
Initially, I created a dummy tooling axis on Z-axis by considering the reference point created in the middle of the circle. Then I create an intersection of CLASS A surface with ZX plane and from the intersection create the main tooling axis.
MAIN TOOLING AXIS
CLASS-B SURFACE:
To create the class B surface, I considered the entire surface has 3 parts 'RIB-1, RIB-2, BASE SURFACE' and FINAL TRIMS. If we directly offset the class A surface, fillets may lead to cause an error, to avoid the errors we need to extract the surfaces and untrim the extracted surfaces and extrapolate those untrimmed surfaces with point continuity. Now trim those extrapolated surfaces to the required shape. And finally, fillets were given to the final trim.
FILLET VALUE = THICKNESS + GIVEN FILLET VALUE
FILLET VALUE = 2.5 + 3 = 5.5
CLASS-C SURFACE:
It is the combination of Class A, Class B and Class C surfaces. To create a class C surface, I used the sweep command by considering the outer boundary of the class A surface. In the sweep command, go to the 'line' command in the 'profile' block and the subtype is 'with draft direction'. Now select the outer boundary and tooling axis, give 3 deg in the angle (the draft angle for a plastic component is 0.5 to 3 deg) and select the direction to sweep, in this condition the class B surface is under the class A surface so select the inside down arrow to sweep. The same procedure is repeated for the two circles on the class A surface. Now I joined all the sweeped surfaces by using the 'join' command and then I trimmed the Class A, Class B and Class C surfaces to make a closed surface, to make a Solid body.
BOUNDARY CREATION:
SWEEP:
JOINING THE CLASS-A SURFACE AND CLASS-C SURFACE:
FINAL OBJECT:
CLOSED BODY:
DRAFT ANALYSIS:
CLASS-A ANALYSIS:
Once the draft analysis toolbar is opened, go to the display block and select the 'Analysis under the running point' command to check the angle for different sides (ribs and inclined plane angles) on the class A surface. The colour scale on the bottom visualizes, whether the draft angle meets the requirements or not (3 deg) by indicating the colours Green, Blue and Red. We need to align and fix the compass to the tooling axis then the draft angle analysis will be checked out.
FINAL OBJECT:
TREE STRUCTURE AND VARIOUS ORIENTATION:
