Week 8 - Challenge 1 - Base Bracket Design
REPORT:
OBJECTIVE:
The essential goal of this challenge is to create the Base Bracket Plastic component via the above-given Class-A surface, with the aid of using giving the `Tooling Axis' and 'Draft Analysis' to the class-A surface of the Base bracket. The Thickness of the BASE BRACKET (Plastic) is 2.5mm.
The material used for this component is Poly Carbonate/Acrylonitrile Butadiene Styrene (PC/ABS) because of its strong and stiff properties which makes the component a suitably rigid material.
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TOOLING AXIS:
We need to keenly look at and look at the magnificence A surface to create the `Tooling Axis' for the component, for the above-given base bracket Z-axis is the suitable and appropriate tooling axis. Initially, I created a dummy tooling axis on Z-axis with the aid of using thinking about the reference point created withinside the center of the circle (hole).
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DRAFT ANALYSIS:
To perform draft analysis, click on Insert >>Analysis >> Feature Draft 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 color scale on the bottom visualizes, whether the draft angle meets the requirements or not (3° deg) by indicating the colors Green, Blue and Red. Once the draft angle analysis was done, we need to align and fix the compass to the tooling axis of the class A surface.
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CLASS B SURFACE:
To create the class B surface, I considered the entire surface has 3 parts 'Rib-1, Rib-2, and Base surface'. 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.
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Pink color is Class B Surface:
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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.
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Final Trim (closed body):
Now I joined all the swept (sweep) 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.
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SOLID - BODY:
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DRAFT ANALYSIS:
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To align and fix the compass to the tooling axis, go to the Direction block in the draft analysis toolbar and click on the 'Use the compass to define the new current draft direction option (or just click on the compass symbol). Now bring the compass to the surface and align it to the tooling axis of the class A surface and click on the lock symbol beside the compass in the direction block. Once we click on 'ok' on the draft analysis toolbar, we can finish the draft analysis process.
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