Week 9 - Attachment Feature Creation (Ribs & Screw Boss) - Challenge 1

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
• Bisecting line
• Trim
• Surface offset
• Draft analysis
• Intersect
• Surface sweep
• Close body surface

DESCRIPTION:

1. CREATING TOOLING AXIS -

The Tooling Direction is basically the direction that the mold pulls a part. The mold is built in two separate pieces, basically. 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.

• Extract the boundary and dissemble the boundary.
• Find the correct tooling axis where the Material don't interfere with the tooling axis and all the elements can be created.
• Create an axis system using at the centre
• Intersect the yz plane with respect to the class A surface.
• Hide the class A surface and create point to point lines on the suspected drafts.
• Create bisecting line with the two lines and point to create a tooling axis.
• BISECTING LINES were used to get the exact medium from the two sides so that maximum positive draft angle can be achieved.

2.Check the tooling Axix And Surface A with draft Anaysis

. DRAFT ANALYSIS

The Draft Analysis command enables you to detect if this not offset 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 material and then click ok.
• Now for draft analyses go to insert » analysis » feature draft analysis.
• Use the compasss to define the draft direction.
• In the colour scale change the draft angle to 3 degrees.
• The component changes to green in an indication of passing draft angle.
• Use running point to check the angle on the component.

3. CREATING CLASS B SURFACE

• offset Surface A with 3 mm Thickness
• some of part surface not offset then create with the surface operation

4. CREATING CLASS C SURFACE

• Extract the boundary from the class A surface using boundary command.
• Using disassemble 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 degree > preview.

5.Final triam operation

To get final surface

1.join surface A with surface c by join command

2.Triam the A & C With surface c

6. PUBLICATION

• 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

Attachment Feature Creation (Ribs & Screw Boss)

RIB CREATION

For creation of Rib on Part body

We follow following Method

Sketch for Rib 1 And Rib 2

Rib 1 Rib 2

Rib Measurement According to Design Creation

SCREW BOSS DESIGN

For creation of Screw Boss on Part body

we follow following steps

Sketch for Screw boss

For

M 5 Screw

WE take

Inner dia =5.2 mm

Outer dia = Inner dia + 0.6*T (Thickness of body )

od =5.2+0.6*3=7 mm

• SCREW BOSS

Draft anaysis for part body

Tree Stracture

Drawing view

Isometric view

Front view

Side view

left side view

Right Side view

Top View

CONCLUSION:

• The Tooling axis and the SolidCAT part with B Side Features is created from the given Class A Surface and Draft Analysis is Performed.
• Design a rib & screw boss according to design constraint