Week 9 - Attachment Feature Creation - Challenge 2

1. OBJECTIVE:

Create the Dog House for the Door Trim considering the design rules mentioned in the video. Consider the thickness of the part to be 2.5 mm.

2.0Definitions

Class-A Surface:

Class A surface is made from scanned data with different software like allias etc.. lass A surface having CURVATURE CONTINUITY

Class-B Surface:

Class-B surface having all features(Rib,boss,snap etc). It is created by extracting the all wall of the Class-A surface.

Class-C Surface:

Class-C Surface is used to joining the Class-A Surface & Class-B Surface. This surface is generated by sweeping the Class-A surface boundary.

Draft Analysis

The Draft Analysis allows the user to easily analyze a part for proper draft angle. A Draft Angle describes the amount of taper for molded or cast parts perpendicular to the parting line

Tooling axis

Tooling axis is tells about the in which direction core should be move. This tooling axis creating by Point and Direction .

Dog house

Dog is feature which helps to avoid sink marks. Dog houses are used as supporting feature. Sometimes other engineering features like snaps; locators etc. are mounded on them to increase their strength.

3. Procedure

3.1 Tooling axis making

• Created a point on surface.
• Created line from point with Y-direction. And named as tooling axis.

3.2 Draft analysis for Class-A Surface.

• Insert--->Analysis--->Feature Draft Analysis
• Draft analysis window will appeared. In that using the compass and define the new current draft direction.
• Locked the draft direction.
• And then click on the surface.
• Color coded on the surface with reference to the draft angle.

Green for 3.0°,

Blue For 0°

Red for Below 0°

3.3 Creating Class-B Surface

• Offset the class-A surface with 2.5mm
• Fill the patches with multi-section surface and then join them.
• Extrapolatethe inner and outer surfaces and named as Class-B surface.

3.4 Creating Class-C surface

• Taking boundary from class-A surface
• Sweep the boundary with draft direction as tooling axis and draft angle 90°

3.5 Joining the Class-A, B & C surfaces

• Trim the Class-C surface with Class-B surface, and named as Class-B+C
• Join the Class-A surface and Class-B+C

3.6 Solid model creation.

• Joined surfaces converted in solid model by Close surface command

3.7 Draft analysis for solid model.

• Insert--->Analysis--->Feature Draft Analysis
• Draft analysis window will appeared. In that using the compass and define the new current draft direction.
• Locked the draft direction.
• And then click on the surface.
• Color coded on the surface with reference to the draft angle.

Green for 1.45°,

Blue For 0°

Red for Below 0°

3.8 Dog House

• Create a out line and then extrude that line along with tooling axis.
• Fill the top surface with multi sections surface
• Join the all surfaces and filet for all edges.
• Thicken that filleted surface.
• Dog house B&C are formed by splitting thicken with trimmed offset surface..
• Create a another doh house by using translation.
• After that too dog houses are union trim with door trim

3.9 Creating side core tooling axis

• Created a line with X-Direction and name as side core tooling axis.

3.10 Draft analysis for final door trim with Dog House

• insert--->Analysis--->Feature Draft Analysis
• Draft analysis window will appeared. In that using the compass and define the new current draft direction.
• Locked the draft direction.
• And then click on the surface.
• Color coded on the surface with reference to the draft angle.

Green for 1.45°,

Blue For 0°

Red for Below 0°

Initially Tooling axis was created by point and direction method. And the draft analysis is applied for class-A surface. After that Created the Door trim component through the given Class-A surface with 2.5mm thickness. Now draft analysis is applied for plastic component of Door trim. After that dog houses are created along with side core tooling direction, and draft analysis applied.