Week 10 - Challenge 1- Attachment Feature Creation (Ribs & Screw Boss)

Attachment Feature Creation (Ribs & Screw Boss)

AIM:

• To Create the Door Handle Component from the given Class-A surface.
• To Create the tooling axis for the given Class-A Surface meeting the requirements of the draft angle.
• To Attach B-side Features in the component.
• To perform the Draft analysis on the model.

TOOLS USED:

• Boundary
• Join
• Multiple extracts
• Bisecting line
• Trim
• Surface offset
• Draft analysis
• Intersect
• Surface sweep
• Close body surface

DESCRIPTION:

1. CREATING TOOLING AXIS -

The Tooling Direction is the direction that the mold pulls apart. The mold is built in two separate pieces. You have a Cavity side and you have the Core side. The Core pulls apart from the Cavity and that's the Dye line or the Tooling Direction.

• Open the given CAT part file.

• Check for gaps between surfaces for that click on join and then preview.
• If there's any gap between the surfaces join them with a maximum tolerance of 0.003 mm.

• Extract the boundary and dissemble the boundary.
• Find the correct tooling axis where the material doesn't interfere with the tooling axis and all the elements can be created.
• Create an axis system using the center of the switch Bezel.

• Intersect the yz plane concerning the class A surface.
• Hide the class A surface and create point-to-point lines on the suspected drafts.
• Create a bisecting line with the two lines and point to create a tooling axis.
• BISECTING LINES were used to get the same medium from the two sides so that a maximum positive draft angle could be achieved.

• The tooling axis is created for the component by bisecting two axes from the x and y planes.

2. PUBLICATION

• The publication is done to the component to make it visible and navigate easily.
• To publish the component go to tools > publications and then select the tooling axis and the class A surface.
• A separate tree structure is formed under the main part.

3. DRAFT ANALYSIS

The Draft Analysis command enables you to detect if the part you drafted will be easily removed. This type of analysis is performed based on color ranges identifying zones on the analyzed element where the deviation from the draft direction at any point, corresponds to specified values.

• Before going to drat analysis go to customized view parameter >under mesh >check the material and then click ok.
• Now for draft analyses go to insert » analysis » feature draft analysis.
• Use the compass to define the draft direction.
• In the color scale change the draft angle to 3 degrees.
• The component changes to green in an indication of the passing draft angle.
• Use a running point to check the angle of the component.

• The draft analysis is complete.

4. CREATING CLASS B SURFACE

• Extract the surfaces from class A using multiple extracts and un-trim them.
• Use Extrapolate to ensure all the untrims are properly intersected to trim and offset the surfaces to 2.5 mm to create the thickness.
• Trim the extra surfaces using the trim command.
• Insert them into the new geometrical set and name them with respective part names.
• Apply fillets to the model after creating the entire surface.
• If the edges are outside the fillet value will be added to the thickness of the component and if the edges are inside, the fillet value will be subtracted from the thickness of the component, for instance, if the thickness of the component Is 2.5mm the fillet value is 15mm so the outside portion value should be 17.5mm and inner edges should be filleted 12.5mm to get uniform thickness.
• Perform trims one at a time so that it will be clear to understand.

5. CREATING CLASS C SURFACE

• Extract the boundary from the class A surface using the boundary command.
• Using a disassembly tool to divide the boundary as the boundary contains domains.
• Use sweep command > choose profile type line > subtype as with draft direction > choose guide curve and draft direction > draft angle as 3 degrees> preview.
• After getting swept then trim the output with class B surface to get the final output.
• Now open the part design workbench and use the closed-body surface to create a solid component.

6. B SIDE FEATURES CREATION

RIB CREATION

• Design Principle for Rib Creation

SCREW BOSS DESIGN

• Design Principle for Screw Boss Creation

• All Images taken Are as follows.

CONCLUSION:

• The Tooling axis and the SolidCAT part with B Side Features are created from the given Class A Surface and Draft Analysis is Performed.