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

DOOR HANDLE Tooling Axis creation: It is defined as the direction in which the mould/core and cavity open. Selection of the direction of the tooling axis depends on the ease at which components can be easily ejected. By analysing the component the most easily ejectable direction is somewhere close to the Z

DOOR HANDLE

Tooling Axis creation:

It is defined as the direction in which the mould/core and cavity open. Selection of the direction of the tooling axis depends on the ease at which components can be easily ejected.

By analysing the component the most easily ejectable direction is somewhere close to the Z direction,(might be inclined to it) so we have made a sketch on the YZ plane of Axis System) to create a bisecting line considering the 2 faces which might be difficult to be tooled.

Creating Class B surface

1. Extract the surface from the class A using multiple extract and untrim them.

2. Use extrapolate to make sure that all the untrims are properly intersected to trim and offset the surface to 2.5 mm to create the thickness.

3. Trim the extra surfaces using trim command.

4. Insert them into new geometrical set and name it with respective part names.

5. Apply fillets to model after creating the entire surface .

6. If the edges are outside the fillet value will added to the thickness of the component and if the edges are inside , the fillet value will will be subtracted from the thickness of the component , for instance the thickness of the component is filleted is 2.5mm the fillet value is 15 mm so the outside portion value should be 17.5mm and inner eges should be filleted 12.5mm to get uniform thickness.

7. Perform trims one at a time so that it will be clear to understand.

Creating Class C surface

1. Extract the boundary from the class A surface using boundary command .

2. Using disassemble tool to divide the boundary as the boundary contains domains.

3. Use sweep command> choose profile type line > subtype as with draft direction > choose guide curve and draft diretion > draft angle as 3 degree > preview.

4. After getting sweep them the output with class B surface to get final output.

5. Now open part design workbench and using close body surface create a solid of the component.

B SIDE FEATURES CREATION

RIB CREATION

• Design Principle for Rib Creation

• Ribs are thin wall protrusions that extend perpendicularly from a wall or plane. They are usually found in clusters offering support to a plane that would have otherwise been too thick, but can also be stand-alone support for a single wall. They are commonly used to provide additional support and strength to a part. Thickness and location are essential to rib design.

  First, the base surface where the rib has to be created is extracted using the Extract command. A positioned sketch is created and the profile for the rib is drawn.

• Next, the profile is extruded, to find the height,h=Wall thickness * 5

  =2.5*5

  = 12.5 mm

  Therefore, the height is 12.5 mm

• The extruded surface is thickened,

  Thickness,w=0.4*t

  =0.4 2.5

  =1mm

  Therefore, the thickness of the rib is 1 mm.

• 

• B Side Features Creation

  Rib Creation

  Design Principle for Rib Creation

  Sketch Used For Rib Creation

  RIB

  Screw Boss Design

  Design principle for Screw Boss Creation

  Sketch Used for Screw Boss Creation

  Screw Boss

  End Draft Analysis