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Closing sweeps ends

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Regular Member

Closing sweeps ends

Recently, in my work I have to do a lot of sweeps, like the one bellow:

PRT0014+%28Active%29+-+Creo+Parametric_2014-09-09_23-47-11.png

Now, to close the ends I have to do a revolve:

PRT0014+%28Active%29+-+Creo+Parametric_2014-09-09_23-47-30.png

This doesn´t seem much work, but, to do the revolve it takes about 23 clicks (Revolve, Select Plane for skecth, add references, define axis, project, trim...) for each end. Total of 46 clicks for closing both sides.

I´m trying to figure out a easier way to do this. I tried copy/paste and udf´s , but both fail often.

Jose

1 ACCEPTED SOLUTION

Accepted Solutions
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Re: Closing sweeps ends

Ok, I found a solution, maybe can be shortened a little but it´s the best I´ve got for now:

1 - Do the sweep

2 - Copy one end surface

3 - Trim it by half (by plane)

4 - Copy all edges of this surface

5 - Create a revolve using this edges

6 - Repeat in the other end.

Grouping it all together I just have to give 4 references for each runner: a curve, one end, other end and a normal plane.

I reduced from about 50 clicks to 5 or 6. Good enough for me.

Video Link : 5294

View solution in original post

20 REPLIES 20
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Re: Closing sweeps ends

If you don't mind a small pip, a round does pretty well.

...and it can be C2 continuous.

end_cap.PNG

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Re: Closing sweeps ends

Since this is a channel to be milled, I have to keep the profile (angle and radius):

Greenshot_2014-09-10_21-16-27.png

Nice pic, Huh??

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Re: Closing sweeps ends

I got to this within a few hundred... maybe a 1,000 clicks

Only few hundred more clicks might have achieved round'r ends.

I'm proud of it though... fully bound with curvature contraints!

capped_end.PNG

Of course, you could sweep the 1/2 profile around the periphery .

capped_end_II.PNG

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Re: Closing sweeps ends

Excellent idea! 1 feature, nice!

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Re: Closing sweeps ends

I can see Frank's little mind-minions at work already...

Frank Schiavone - little minion cloud:

...How can I turn that into a VSS -AND- Spinal Bend... Mu-hahahaaaa!

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Re: Closing sweeps ends

Hah! You know me too well bro! I tried a VSS, figuring it would fail because the section became normal to the spine...and it did. Would be cool if it'd worked...... BUT...the full round is a more powerful tool than people think, it didn't work in this case (for some odd reason, maybe because the end surfs are angled), but if you add a radius to the end lines (ends normal to the sweep), then do a full round, you'd be surprised at how well that works.

Re: Closing sweeps ends

You´re right, It can be done that way, but it´s much more complex to draw the boundaries instead of the centerlines. It´s a solution that I can´t use.

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Re: Closing sweeps ends

You do not have the mold design package I am guessing?

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Re: Closing sweeps ends

Yes I have, I can create runners with it, but...... the runner only allows to create cuts, not create "extrudes", I need to create the solid of the runners first, and then make a cut-out.

Also the runner feature seems to have some bugs.

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Re: Closing sweeps ends

Ahhh, runners. Remember when you got a plastic model to put together, and there was more total material in the runners than the parts?

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Re: Closing sweeps ends

Ok, can you do it backwards? create the channels first and then copy the surfaces to create your extrude version?

And not sure what bugs you have with runner tool, it seems to be one of the few that work really well in the mold package for me.

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Re: Closing sweeps ends

...or All-in-One

capped_end_III.PNG

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Re: Closing sweeps ends

I may be off topic a little here, but thought this was worth a mention. I create a lot of channels cut into solid blocks, very similar in profile to Jose's. I had the same problem, how to round off the ends, to actually reproduce what a milling cutter would give. My approach is to use the hole feature, specifically 'hole on point placement'. Within the hole feature, you have the option to sketch a hole, sketch 'half' the profile in the same way you would, if doing a revolve end. I have placed datum points at each end of my sweep curve (geometry points added to the curve itself, cuts down on model tree features), select one for hole placement, & voila! you have a rounded end. What brings this into its own, is if you have multiple ends to do, you just copy & paste, selecting a new datum point for another end. Hopefully, the attached model & image explain my approach further.Capture.JPG

Regards

John

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Re: Closing sweeps ends

I was looking for that sketched hole in Creo 2 but didn't see at at a glance. Hope it is still there somewhere.

edit: phew.... yep, still there

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Re: Closing sweeps ends

Nice, that´s something that I didn´t try. It´s a much more easy way to get it done.

But I see 2 disadvantages there:

1 - Dimensions of the hole aren´t constrained with the dimensions of the sweep. If you need to adjust values, you need to do it in three features.

2 - It´s only possible to remove material, not to add.

But a good option, no doubt about that.

Thanks

Jose

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Re: Closing sweeps ends

Hi, with regards to point 1, you could link the hole dimensions to the sweep dimensions by relation, thats what i do.

John

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Re: Closing sweeps ends

Ok, I found a solution, maybe can be shortened a little but it´s the best I´ve got for now:

1 - Do the sweep

2 - Copy one end surface

3 - Trim it by half (by plane)

4 - Copy all edges of this surface

5 - Create a revolve using this edges

6 - Repeat in the other end.

Grouping it all together I just have to give 4 references for each runner: a curve, one end, other end and a normal plane.

I reduced from about 50 clicks to 5 or 6. Good enough for me.

Video Link : 5294

View solution in original post

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Re: Closing sweeps ends

That was my initial method as well, Jose, but I ended up with 23 clicks on each half. Since you mentioned 22 clicks per half, I assumed you used the same method. However, that copy/paste thing is nice

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Re: Closing sweeps ends

Sorry if I wasn´t clear enough. My target is to replicate sweep and revolved ends with minimum number of clicks/references. Ideally, creating a UDF that only asks for a curve and a plane.

I started with the sweep and then creating a revolve at the ends. But to do the revolve, I can use only half of the section, projecting the edges, creating a line in the middle and trimming the curves.

No problem until this point.

Now I try copy/paste to the other end, it asks me all the edges references, and it fails often. I do the revolve manually again, group all features and try to copy/paste using other curve, problems....

I try to copy revolved ends to other sweeps with varied dimensions, problems...

The trick here was to copy the surface, trim it by half, and use all edges for the revolve.

Now I can replicate the sweep with revolved ends just giving a curve, a plane and two endpoints.

I have parts where I have to make twenty or thirty sweeps like these, now I make them much more faster.

Jose

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Re: Closing sweeps ends

What if you change the order and put the revolves in first, and reference the tangent edges in the sweep?

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