3D Modelling a Pressure Fitted Part?
[removed]
Posted Sep 22, 2021, 2:36 AM UTC
021
What if you just make the printed part's bottom bigger so it sits on top of the bowl instead of inside it?
2
I think I might get away with that, my shelf does have a height limitation, so Ill have to do some measuring. I did want the sleekness of it inside because it looked cool haha.
1
Maybe you could just add 4 extruding notches on top of the current plate design towards the edges of the bowl to prevent it from sliding/tilting? This way the total height would remain the same
2
Now thats something I overlooked. I can just add a brim to the plate that just sits at the lip.
Thank you a lot, I think your idea is the best
1
👍glad i could help
2
I would make the piece sit on top with a recessed circle to fit the lip of the bowl
2
I dont know if you can pressure fit it with that angle, but if the bowl is air tight you might be able to create some kind of vacuum mechanism to keep the two parts together. I'm guessing you want to use the bowl to whip the shaving cream so I guess that might work but it might not hold a vacuum long enough til your next shave and could potentially fall apart in that time.
1
Yea, I wanted to stack the razor and brush holder into the cup to save horizontal space, but not all the way down as I keep a puck of soap in it.
Thinking the angle is too steep? I can make the base thicker of course, but not sure if that will help.
I may throw off a few print with different demension to see if one sticks. The measurements I have are rouuuugh. I took measurement of 2 spots and took the distance between those 2 to calculat the slope angle, but I was wondering if there is a better way.
1
None of them will stick. It's the angle, not the depth, that's the problem.
2
This is your answer, OP. The self locking taper angles in steel are <~7 degrees. Collets designed to be self releasing are over >~16 degrees. It only gets worse for materials with a lower coefficient of friction.
1
Locking means free of movement in this case yes? That's some good stuff to learn. So the rough angle I calculated was 17.5°(I think, refer to drawing)
1
It's included angle, so yours is 35 degrees.
1
I see. Thank you for teaching me today haha.
1
Just a thought. If you were to glue two small tabs of wood to the inside edge of the bowl, you could make the part where it's like a twist lock. The tabs would hold the piece in place, but if you twist it, then you could pull the part up past the tabs.
Looking down on it, the grey is recessed and obviously the outer ring - the bowl - is smaller to fit the part, but just for illustration purposes. I hope that makes sense.
1
That's and interesting idea I’ll have to think about!
1
Add a rubber ring to the base. Should keep it in place and seal your soap
1
Glue
1
Question? - Please use r/3DPrintTech/
1
Yea, I saw that sub and it looked more hardware relateded, my apologies.
1
Redesign the part so that instead of fitting into the bowl, have it go around the bowl and down to a base. Basically make the part free standing with a little cubby/shelf in the bottom that you store the bowl in.