extrude different geometries of the same sketch

[wepp]

Good evening,
as visible from the attached image I realized in a same different geometries sketch (cylinders, parallelepipeds).
I would have the need to make some cylinders like extrusions with addition of material and others as subtraction of material, but the program selects all geometries and extrudes them in the same way.
to make different extrusions do I have to work on different sketches?

 

[francescodue]

for what I know you can use the same skecth with different features, but a sketch cannot be partial.
If the sketch was a series, you could activate some cylinders with extrusion and others with cutting, but it's a thing to try: personally I never did.
usually work with distinct sketches.

 

[320i S]

"simple" solution: made the layout sketch, do the individual extrusions, using sketches that partially re-enter the main sketch; you have a control that's more than you want to do.
a single command that allows you to alternate extrusions of volumes or cuts there is (and it doesn't even make sense there is).

 

[ceschi1959]

"simple" solution: made the layout sketch, do the individual extrusions, using sketches that partially re-enter the main sketch; you have a control that's more than you want to do.
a single command that allows you to alternate extrusions of volumes or cuts there is (and it doesn't even make sense there is).

with nx you can see the video.

 

[320i S]

but is it within a single command?, or are separate extrusions then into the function tree?

 

[AndreaTerzi]

If that's why it's also solidworks ... with creo parametric you can use, as 320i s says, a sketch layout and then with the project go to copy, with reference, the elements you need in the individual sketches inside the feature.

 

[ceschi1959]

but is it within a single command?, or are separate extrusions then into the function tree?

are separate extrusions that use individual curves of the same sketch, in nx you do not have to declare if you want to remove or add, you can also keep the solids separated and then use merge subtract and intersect to pleasure. note that I didn't have to copy sketch elements for extrusions (or any other command that 'apposes' to a sketch) but are the same curves.
another example of nx versatility I show you in the example of the video: I draw a random line and then extrude the region between the edges of the cube and the line that the software automatically recognizes without needing to copy the edges and cut the curves... .

 

[320i S]

as it says goes to third parties, it is a function also present in soldworks.
in creo have been unified under the same command, extrusions of volume, cutting and extrusion surface, so also with creo it is not necessary to choose a priori what will be extrusion, what I create requires, is a dedicated sketch, which can well be copied from a general sketch.
My objection is that it makes no sense to have a single command with different extrusions inside (which are volume, cut or surface), this has only the advantage of having less functions in the tree, but on the practical side, it would only be a visual complication and algorithm.

 

[320i S]

on the speech of the "region", is an interesting command for speed, with creo you copy a surface, you cut it with a line (not necessarily parametric) and you give a thickness.

 

[AndreaTerzi]

in creo came to unify the feature (add, remove and surface) because in the old versions proe (pre wildfire) if one selecting the "protusion" feature (extrusion in add) could no longer change in a remove material. He had to cancel the feature and start from scratch. today is definitely much leaner.

 

[ceschi1959]

I attach two films: in the first you see as from a single sketch I make two extrusions, one with three solids and the other with one. then join the second with the first and subtract the other two to the result. I could have used the whole feature for union as well as single solids. I can remove the union and make it subtraction.
in the second film we see how an extrusion can be composed of solids and surfaces at the same time and how these can be edited to become surfaces and solids.

 

[320i S]

Sorry baskets, the concept that monsters is clear, with the boolean this is at the order of the day, catia and solidworks work in the same way (just to name a few), creo requires a different approach to obtain similar geometries.
the objection you make, is that it makes no sense to have in a single command more volume and cutting extrusions depending on the selected sketch.
you will converge (given your experience) that would only be a complication of algorithm, without any practical benefit.

 

[ceschi1959]

......
the objection you make, is that it makes no sense to have in a single command more volume and cutting extrusions depending on the selected sketch.
you will converge (given your experience) that would only be a complication of algorithm, without any practical benefit.

I agree perfectly with you about volume and cut extrusions, but it seems to me that the initial question was not that but that

to make different extrusions do I have to work on different sketches?

with nx you don't have to copy/duplicate any entity, you can even use mixed entities without copying them in the sketch (the first video with region extrusion).
This is an advantage or is a handicap... I don't know it depends on the experience. I know well only in my software and as they say.... every scarrafone is nice to mom soja
Hi.

 

[masspa]

Good evening,
as visible from the attached image I realized in a same different geometries sketch (cylinders, parallelepipeds).
I would have the need to make some cylinders like extrusions with addition of material and others as subtraction of material, but the program selects all geometries and extrudes them in the same way.
to make different extrusions do I have to work on different sketches?

Try to make an empty extrusion and use the 'project' command only on the entities of the sketch that interest you.

 

[maxopus]

It's been a long time since I've been in the forum, but I see that veccho vizio remains in certain subjects.
Can you tell me about checcaxo's grace?
Is it any use to who asked the question?