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

Aim:

1. To create a tooling axis and perform draft analysis on the given class-A surface.
2. To create class-B,class-C surfaces and make the part material.
3. To create ribs and screw bosses as per the given drawing.

Procedure:

Creation of Tooling Axis:

1. The class-A surface is analysed for suitable tooling direction.
2. A flat surface is extracted and a point is created on the surface and using the line command ,the tooling axis is created.

Creation of Draft Analysis:

1. After creating the tooling axis, select Insert>Analysis>Feature Draft Analysis.
2. Select the compass and coincide it with the tooling axis and lock the compass.
3. Give the draft value as 3 degree.
4. Click on the surface and draft analysis is done.

Creation Of Class-B Surface:

1. The class-A surface is offsetted for the required thickness i.e., 2.5mm.
2. The patches in the offsetted surface is cleared by using boundary and fill commands.
3. The class-B surface is joined.

Creation of Class-C Surface:

1. The class-C surface is created by sweeping the class-A surface boundary.
2. The boundary and sweep commands is used for the above step.
3. In this challenge, extrapolate and trim commands are also used to arrive the class-C surface.

Creation of Class-A+B+C surface:

1. The Class-A and class-C surface are joined using join command.
2. The class-B surface is extrapolated.
3. Using the trim command, Class-A+B+C surface is obtained.

Creating Cad Part :

1. The part design window is opened.
2. Using the close surface command, the final cad part is obtained.

Creating Ribs:

1. Using positioned sketch, the ribs are drawn according to the requirements.
2. Using pad command, the ribs are designed with a thickness of 1mm(0.4*2.5=1) , height of 12mm(4.8*2.5=12) and a draft angle of 0.5 degree and edge filleted for 0.25 mm(given).

Creating Screw Bosses:

1. Using positioned sketch, the screw bosses are drawn according to the requirements.
2. Using pad command, the screw bosses are designed with a inner diameter of M6 screw of 5.2mm,outer diameter of 7.2mm, and height of 7.5mm(3*2.5=7.5) and a draft angle of 0.5 degree and edge filleted for 0.25 mm.