Week 9 - Attachment Feature Creation - Challenge 1
DRAFT ANALYSIS OF RIBS OF COIN HOLDER
Objectives:
To design RIBS of COIN HOLDER & add thickness to it.
To perform draft analysis on COIN HOLDER part model.
Steps to create of RIBS in COIN HOLDER model:
First, extract bottom surface of COIN HOLDER part model using EXTRACT option.
Now, create a point in center of this surface & place a new axis system on it.
Make a sketch for a RIB on the surface as shown in image.
Part thickness of COIN HOLDER is 2.5 mm. Here RIB depth will be 0.5* (part thickness) = 12.5 mm.
EXTRUDE it about 12.5 mm & use ADD THICKNESS to it in PART DESIGN.
For RIB thickness, it will be 0.4* (part thickness) = 1 mm.
For the distance between two consecutive RIBS should be ratio height to width is two. i.e. Y/X =2:1
According to this ratio, height is 12.5 which is divided by 2. So, width of RIB will be around 6.25 mm.
Offset the previously created line about 7 mm according to industry standards.
EXTRUDE this second RIB & thicken it.
According to industry standards, minimum draft for RIBS is required 5° DRAFT. So, give 5° DRAFT on both RIBS as shown in figure.
Apply 0.25 mm fillet on all over edges of RIBS.
In this way, RIBS are created on given part model according to guidelines.
Steps to do draft analysis on COIN HOLDER model:
Go to insert > analysis > feature draft analysis or directly click on Feature draft analysis icon from menu.
First select compass option from pop-up menu to set axis system coincide with tooling axis.
Here change position of TOOLING AXIS by moving compass location and use lock option to fix it to give every surface a proper draft.
Surface model will turn into green colour surface, which shows that draft for model is in limit upto 3 degrees. Here I have given green colour for 3 degree draft, light blue for 0 and red colour for negative draft.
Run quick analysis on model and if any draft angle is more than limit, then one can apply new value of it in pop up box.
Full analysis shows different draft angles with different colours as shown in figure.
Here is an example of INVERT DRAFT DIRECTION analysis.
Below image shows the different views of draft analysis of COIN HOLDER model.
Here are snaps of feature tree of this COIN HOLDER model:
Conclusion:
I have learned about creation of RIBS creation for them in given COIN HOLDER model in this challenge. Also, I understand the importance of RIBS creation in terms of industry standards.