Week 8 - Challenge 3 - Coin Holder Design

AIM:The objective of the project is to design the coin holder and to do a draft analysis for it by creating the required tooling direction with the help of TOOLING AXIS METHOD and perform draft analysis.

INTRODUCTION:

Coin Holder is a plastic component used in vehicles, the Class A surface is provided for creating a solid component with a thickness of about 2.5mm. Class A surface: It is also called a styling surface, which consists of textures and represents the part having surfaces with a curvature continuity.

REPORT-

CONSIDERATION :

• Class – A surface should be aesthetically smooth
• Class – B surface should have all the supporting features like ribs.
• Parting Line should coincide with the B surface since flashing couldn’t affect the aesthetic of Class – A.
• Class – C surface should also pass the draft analysis.

Objective:

• Geometrical sets should have a proper name based on the sketches present inside them.
• All the sketches should be created under the Geometrical set.
• Use the CLOSE SURFACE feature to make a solid body from the surface.
• To publish the Tooling Axis, Class A, B, and C surface.
• Ensure Proper Tree Structure.

DRAFTING ANALSYIS FOR CLASS A SURFACE :

• CLASS A BASE is extracted and a point at the centre is created with referance to the base of CLASS A.
• Then, using project intersection along yz plane is created and the two inclined lines were drawn inside the positioned sketch.
• DRAG THE COMPASS TO THE AXIS LINE AND CLICK DIRECTION .

CLASS A SURFACE:

• Go to insert- analysis- feature draft analysis
• Align the tooling axis with the compass.
• Click on the surface and see that the surface is within the permissible limit of the draft values.
• The surface should be green and in the column nominal value 3deg given as input. hence the draft analysis on the class-A surface is successfully performed.

CLASS B SURFACE:

• For creating the class-B surface the required surface except the offset surface have been extracted and then untrimmed all the surface.
• Then all the surfaces have been extrapolated to get intersections between them.
• Since the thickness of the coin holder is 2.5mm the B-Surface was offset to 2.5 mm and the required trim operations must be carried out.

operations:

• extract
• untrim
• offset
• extrapol
• multiple extract

EXTRACT:

UNTRIM:

BASE BOX FOR CLASS B:

UPPER BODY:

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 90 deg in the angle 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.

OPERATION'S:

• BOUNDARY
• SWEEP
• SMOOTH CURVE'S
• EXTRAPOL
• TRIM
• MULTIPLE EXTRACT
• JOIN

A AND C PART:

FINAL PART:

DRAFT ANALYSIS OF CLASS C:

For this analysis, main tooling axis is taken draft reference.

Following results were obtained:

SOLID PART:

CONCLUSION:

The Design of Plastic Component - COIN HOLDER from Class A is completed using concepts of Draft angle, Draft Analysis, Tooling Axis, Class B and Class C creation and converting Closed surface to a solid part.