Extruding with Free Form Bodies

[Anonymous]

Hi there!

More questions with Free Form.   😄

I have created a part that needs to have a 1mm x 45 degree bevel underneathe it.  

What I've done so far:

-I currently have 2 Freeform parts and used the Combine tool to join them together

-Next I created a Fillet between the two parts

-I then used an Offset Workplane to create a Split on XZ and new Sketch to Project the outer Geometry of the Combined Parts.

-This is where I want to use that Projected Geometry to create an Extrusion of 1mm with 45 degrees taper but its only allowing me to have 11 degrees.

I've been trying so many different ways around this, changing angles, changing the Freeform shapes but no luck...  Is there a way to determine EXACTLY where the Extrude is intersecting on itself as I feel I am only taking stabs in the dark and getting no where 😞  or even better is there another way to create this 45 degree bevel under my part?

thank you! 🙂

[WHolzwarth]

It can't be done easily. Some workarounds are needed.

2018 IPT attached

[Xun.Zhang · Accepted solution]

Hello,

If you create an other workplane offset to the split plane as 1mm, then create a new sketch, make the sketch offset that loop 1mm, you will find the intersects for the offset loop, that's the reason. 

Please use trim command to remove the intersects and make a loft instead, refer to the attached part. 

Hope it helps!

[WHolzwarth]

Some task for Software QA Engineering, Xun. Bad loft ..

[Xun.Zhang]

Ah, maybe two more guidelines needed in both side.

[johnsonshiue]

Hi! Instead of offsetting the sketch to create the profile, this case may benefit from offsetting the side faces and then projecting cut edges. In this way, the self-intersection profile will be cured by surface offset.

Many thanks!

[Anonymous]

Yay!  Thank you Walter, Xun and Johnson! 🙂

Ok So I had a go at it and was able to get pretty close using the Thicken/Offset Surface and then Projecting on an Offset WorkPlane of 1mm and using Loft Feature.

Xun I wanted to go with the offset of Sketch but I am having trouble, it doesn't seem to allow me to Offset outwards, only in? (I have attached a Screenshot, its not showing but when I bring the Offset outwards, it has a small circle with a cross through it)

In my second picture I posted, the intersecting point doesn't look clean, it's like overlapping, how could I fix this?  This is why I was hoping to use the Offset Sketch option but unfortunately doesn't work. 😕

Again, I am grateful for the help, I've been teaching myself as much as I can and you guys have been amazing in expanding my Inventor/ Freeform knowledge!  🙂

[Xun.Zhang · Accepted solution]

Hello,

I don't have the offset problem and you can download my model directly. and, this one is better and simple without Loft but extrude instead.

[Anonymous]

thank you again for your help! 🙂