Week 10 - Challenge 2- Attachment Feature Creation (Dog House)

CLASS A SURFACE:

TOOLING AXIS CLASS A SURFACE:

• Class-A surface is first analyzed to create the tooling axis. where the molds pull apart in injection molding. Tooling direction is essential for plastic product design as it decides the direction for mold separation.
• To create the tooling axis first we have to check the best suitable direction for tooling by using the compass. the y direction is suitable for creating the tooling axis because in the y direction most of the surfaces are clearing while performing draft analysis. Generally tooling axis is created using bisecting line method but here A line normal to the surface is created in the y direction and considered the tooling axis.

CLASS A DRAFT ANALYSIS:

• After creating a tooling axis we do the draft analysis. Before drafting we have to make sure that in the view mode it is selected for the materials.
• After selecting the feature draft analysis tool we drag the compass from its position to the tool axis. Then lock the compass. After that select anywhere on the component and it will give you the result.
• We change the minimum draft for the component to 3°.
• We can use the running point option to check the angle of the component.

CLASS B SURFACE:

Following procedures are used to create surface B class.

1. We directly offset the given bumper surface at 2.5mm distance inside with the help of offset comment fore b surface
2. Some discontinuous surface filled with some comment like blend, fill, Mss etc.
3. If we need any bounty expand with the help of extrapolated comment.
4. Trim unwanted surface
5. Finally, we got surface B class.

CLASS C SURFACE:

1. Extract tool is used to create the boundary lines separately on side edges of class A surface
2. Reference surface option sweep comment is used to extrude the created separate extract boundary lines at 90 degrees.
3. Finally merge all sweep surface to get class C surface.

A+B+C SURFACE WITH 2.5 MM THICKNESS:

1. Join command is used to join the surface A class and the surface A, C class
2. Trim commend is used to trim class AC and B. They join themselves.
3. Finally, we got hollow product.
4. In part bench close commend is used to get the solid model
5. We give different colours to appearance and easily analysis different parts.

SOLID PART CLOSED SURFACE:

DOG HOUSE:

• Dog houses are designed to avoid SINK MARK created on the CLASS-A surface by screw bosses and to solve the length issues when giving screw bosses which need to be assembled to other components.
• It is also useful when perpendicular screw bosses are required on the part to the tooling direction.

• C thickness should be 40% of the main wall thickness T
• Minimum width of the dog house is 12 mm.
• Height of B should be 3-6 mm
• Minimum draft for the do house degrees 5 degrees to die draw.

DRAFT ANALYSIS SIDE CORE TOOL AXIS:

ISOMETRIC, FRONT, SIDE, AND TOP VIEW:

TREE STRUCTURE:

Challenge 2- Attachment Feature Creation (Dog House)

FINAL DRAFT ANALYSIS: