Week 9 - Attachment Feature Creation - Challenge 1

AIM:- To create the rib for the center console coin holder considering the design rules

RIB DESIGN:-

Rib provide a means to economical stiffness and strength in molded parts without increasing overall wall thickness.

They also failitate

• Locating and arresting components of an assembly.
• Providing aligment in mating parts.
• Acting as stops or guides for mechanisms.

Guidelines for Ribs on Show Surfaces

• Draft
• Thickness
• Height
• Spacing
• Thickness at Top
• Optional Radius
• Design Sugestions

Procedure:-

Creation of Tooling Axis

Tooling Direction is basically the direction that the core pulls apart from the cavity. And some components have ribs, pockets, walls.... are going to be drafted based on the Tooling Direction. So make sure the tooling direction which is cover all phases of the components and Core pull apart from the Cavity, nice and clean.

Here using Bisecting method to create a Tooling Axis. There are so many methods to create a Tooling Axis for differnt type of components.

Bisecting Line:-

• First visually check given class A surface for to find out tooling axis which is cover all faces. Herer in this case viewing from Z direction we can clear the face in tooling
• Most of the cases we create the point in holes and pockets of the part, because the holes and pockets is to create a problems when we do the daft ananlysis so we creat a point in mid of the hole. and create a axis system on it.
• And using intersect command intersect the surface and draw the lines on the walls and create a disect line with help of b isecting line command.

DESING RIBS:-

First extract the over the which construction for the ribs performed. And draw the sketch for rib.

Then extrude the line along the tooling direction to a height of 12.5mm following the design rules of H=5*t (thickness of the component)

After that thickened the extrude plane by 1mm as per the following guide rule thickness of rib=0.4*t

And then draft by 0.5 degree along tooling axis

After that give the fillets to draft rib with fillets value of 0.25mm radius.

Another rib is created at the spacing of 2*t following design rules

Checking the rib design

Root analysis

First Intersect the part along the XY plane. After that with help of tritangent circle create a circle from the outlines of ribs and base surface, and then measure the circle dimensions.

Draft Analysis :-

The Draft Analysis command enables you to detect if the part you 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.

• To perform the darft analysis the view parameters are first set to material mode.
• then go to insert -analysis-feature draft analysis, the following window will be appeared.

• First select the axis system and drag the axis system to the tooling axis and lock the orientation. This axis system defines the draft direction according to the tooling axis
• Switch on the colour scale and set the draft value 3 degree using colour scale and it will be displayed in green colour any draft angle below 3degree will be shown in red colour.
• Now select the runing point tool to measure the draft angle at the various locations.

Result:-

The ribs for the Center Console Coin Holder has been successfully created considering the all design rules.