Split part with faces

jan_suchánek

Hi all,
sorry for a stupid question, but can You please help me with splitting the pot with three 120 degree faces? I can´t find out how to. I think the problem is, that i don´t have joined the faces, but I can´t do that.

https://cad.onshape.com/documents/cf471a0d7cf6cd9fe50ea7ae/w/842a1adbe36e0435dbd9aa3b/e/bfef304e39ca53a7d444f502

wayne_sauder

@jan_suchánek
 Your splits do not work because you are not actually splitting anything, you are trying to cut. For the split to work it needs to actually split the part in 2. 
See this example for a way that you could work around this and make split work. 
https://cad.onshape.com/documents/7cb97ff966571c975a674906/w/748f38e873299887b782b497/e/5120fb7985db3ede29c6d625 

NeilCooke

If it's rotationally symmetric, just extend and boolean two of the surfaces and cut the part in two and discard the big piece. 

robert_scott_jr_

Hey Jan. I took a look at your document. I expected the split that you are trying to achieve to work. It works with one of the flat surfaces but not a dovetail surface. Section view shows a problem at the separation of the pot's top and bottom. I'm curious about that. Hope someone else chimes in. - Scotty

https://cad.onshape.com/documents/070963f73fa87ebb6851f1fa/w/6c222f0f9537dc74b69235a0/e/c092a1782665be7f7ffa4721

GWS50

Here is a solution. I had perform the first split with a plane, then the dovetail surfaces worked. It's a bit weird that it wouldn't do the spilt to start with though.
I'm sure someone will come back with a reason but for now have a look at this

https://cad.onshape.com/documents/35d2281bbdf7197fdb68718a/w/94c1be27f56adda0398bf137/e/3db6e8f07c634fd0fda9763a

jan_suchánek

NeilCooke said:

If it's rotationally symmetric, just extend and boolean two of the surfaces and cut the part in two and discard the big piece. 

I already tried that, but extended surfaces can´t be joined with boolean. It refused to do that.
But I did it with thicken and remove function already.
 

S1mon

Try a mutual trim on the two surfaces first.

GWS50

jan_suchánek

GWS50 said:

Here is a solution. I had perform the first split with a plane, then the dovetail surfaces worked. It's a bit weird that it wouldn't do the spilt to start with though.
I'm sure someone will come back with a reason but for now have a look at this

https://cad.onshape.com/documents/35d2281bbdf7197fdb68718a/w/94c1be27f56adda0398bf137/e/3db6e8f07c634fd0fda9763a

Thank You! It works, but as You wrote, this is not normal behaving IMHO. Maybe someone will find the reason why :-).

robert_scott_jr_

I made the dovetail surface a part with a thickness of .001". Boolean Remove works. - Scotty

https://cad.onshape.com/documents/070963f73fa87ebb6851f1fa/w/6c222f0f9537dc74b69235a0/e/7e30bccdbf4f14a462f31df1

wayne_sauder

@jan_suchánek
 Your splits do not work because you are not actually splitting anything, you are trying to cut. For the split to work it needs to actually split the part in 2. 
See this example for a way that you could work around this and make split work. 
https://cad.onshape.com/documents/7cb97ff966571c975a674906/w/748f38e873299887b782b497/e/5120fb7985db3ede29c6d625 

jan_suchánek

Thank You @wayne_sauder!