Door Arm Rest Week 8 Challenge

1).

D OOR ARM REST

AIM: CREATION OF DOOR ARM REST AND ADD THICKNESS OF 2.5 mm

In an automotive context, an armrest (or arm rest) is a feature found in many modern vehicles on which occupants can rest their arms.

 

Tooling Axis:

It is the direction in which the component will be ejecting after the molding process is completed. The direction of tooling axis should clear the maximum portion of the part.

It should be selected in such way that number of side cores will be minimum as it will add more cost to the process.

Workbench and tools used

Generative shape design Extract

Extrapolate Join

Trim Offset Boundary Edge fillet

Intersection Sweep

Close surface

Feature Draft Analysis

Design Process in CATIA V5

Given Data, Class A surface,

 

Now we will be doing Draft analysis on Class ‘A’ Surface, for that we need tooling Axis.

Tooling Axis creation: Bisecting Method

First, we will extract the base surface of class ‘A’ and on that create the point and then create Axis system at that point. As we have only three side walls, we need to create tooling axis with different method.

Then creating intersection curves in X direction and creating side lines on that curves and then creating the bisecting line in

sketcher.

Then creating intersection curves in Y direction and creating side lines on that curves and here we have only one side wall so we will create line passing through the point which we have created in above steps at an angle of draft in sketcher. Here angle taken is 5 degree to get all faces feasible with tooling direction.

Then creating bisecting line through X and Y direction tooling lines.

After that creating the dummy tooling axis in Z direction. This line is the Dummy tooling axis for our part.

 

Compass Method:

Checking draft analysis with dummy tooling axis and if tooling axis is not correct then adjusting compass to get the surfaces as green.

Then right click - lock current orientation - cancle draft analysis - select line - line direction - compass direction. Then View - Reset compass

This line will be Main tooling axis.

 

 

Creating Different tooling axis for Cavity and Adjusting with compass then creating line with compass direction in Y-direction which is for Slider.

 

 

‘B’ Surface Creation:

Extract Class ‘A’ Surface. Untrim extracted surfaces. Extrapolate to some extend.

Use trim and select proper surface. Offset inward at 2.5 mm

Use edge fillet.

 'C’ Surface Creation:

Take outer boundary using Boundary command of class ‘A’ surface Use Smooth curve.

Use sweep command to create surface using tooling axis and draft angle as 3 degree. Create points and line to split the surfaces as and where ever needed

Join the split surfaces with multi section surface.

 

Final Body creation:

Join class ‘A’ surface and ‘C’ surface.

Trim resulting surface with ‘B’ surface.

Join the surface.

Result is complete close surface.

 

Final Draft Analysis:

Z-direction axis, 

Y-direction axis,

 VIEWS