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

We have to first make the solid body from the class A surface.

We should be start with the first with create with the tooling axis for creating the tooling axis we have select the edge which are to be create the issue for the draft or plastic mold.

So, we have to do the draft analysis for the plastic mold so we have to analyse the part for creating the dummy axis and then we have to create the bisecting line from this edge. due to the complex surface, we can direct take the side on which the part can be taken out.

Here this tooling axis can be used to see the draft analysis.

After the creating the tooling axis we have to creating the B surface from the A surface so we extract the surface as wall and base surface for the fillet are not easy to make

For making the B class surface we have to extract the plane surface and untrim and extrapolate them so that they can be intersect and then we can trim them as one surface and then we have to offest at thickness as here 3mm.

Then we have to fillet it but when we are giving the fillet radius, we have to consider this fillet value add or subtract it by the part thickness or not.

After creating the B surface, we have to create the C surface from the edge which are closed or the closed the surface and then we have to trim the B surface with the C surface and then join the A surface and trim surface and then we get the final surface of base bracket for the creating the C surface we have to use the boundary and the multiple extract tool to get the edge to create the surface.

After that we have to create the thick surface in the part design workbench before that we have to check the surface is closed or not then we create the thick surface.

In draft analysis we can see the green and blue colour which so the green means draft more than the 3° and blue for draft minus.

We have to check the all the draft value of side and all surface so it need to be equal to the 3° or below it then resolve to get above than 3°.

Then we have used the closed surface to create the thick part of the door handle.

Then we have to create the rib on the B surface which are not seen by customer or part.

Rib

for making the ribs we have to take plane or surface on which we want to make ribs then sketch on that plane as line then pad it by the the thickness. But this thickness and the height and the fillet radius of the ribs are calculate by the some rule they are as follow :-

<!-- [if !supportLists]-->·        <!--[endif]-->Draft -0.5 degrees per side minimum

<!-- [if !supportLists]-->·        <!--[endif]-->Thickness - Typically 40% wall thickness

<!-- [if !supportLists]-->·        <!--[endif]-->Height <5>

<!-- [if !supportLists]-->·        <!--[endif]-->Spacing 3:1- steel height / width ratio maximum

<!-- [if !supportLists]-->·        <!--[endif]--> Minimum thickness at Tip - .75mm

<!-- [if !supportLists]-->·        <!--[endif]--> Radii - 0.25mm maximum

<!-- [if !supportLists]-->·        <!--[endif]--> Ribs on opposite side of wall should be offset

<!-- [if !supportLists]-->·        <!--[endif]--> Ribs should be connected to other structural features where possible.

For checking the rib is good or not we take the intersection and calculate the thickness by the root rib thickness.

Screw boss

Screw boss rule

<!-- [if !supportLists]-->·        <!--[endif]-->Draft -0.5 degrees on walls of boss.

<!-- [if !supportLists]-->·        <!--[endif]-->Thickness Typically 40% of nominal wall at base.

<!-- [if !supportLists]-->·        <!--[endif]-->Height to Diameter Ratio 3:1

<!-- [if !supportLists]-->·        <!--[endif]-->Radil-0.25mm maximum radii.

<!-- [if !supportLists]-->·        <!--[endif]-->Boss gussets must meet rib guidelines

<!-- [if !supportLists]-->·        <!--[endif]-->Need to plan ahead for type of ejection.

<!-- [if !supportLists]-->·        <!--[endif]-->If less than 25mm tall, draft is not required when sleeve ejection is used.

<!-- [if !supportLists]-->·        <!--[endif]-->Over 25 mm tall, draft is required on outside wall only if sleeve ejection is used If sleeve ejection not used, draft is required on all walls.

For checking the Screw boss is good or not we take the intersection.

In this way we have create the door handle with the screw boss and the ribs on the surface.