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Need Help with round in bottom of ..

T

tdekon

New member
Need help with round in bottom of extruded pocket. I am new to solid modelingbut have had 40 hrs of WF4.0 training. The slot bottom should be a half round with 1/2 spheres on the ends but I cannot figure out how to do correctly. The slot width is .310 and trying .155 rad will not regenerate. .150 will regenerate but leaves a 'flat' between the two rounds that is causing issues in Mechanica. Full round does not seem to be an option in this case. Help please.


Thanks, Terry
 
I made it this way: I create a plane parallel to the bottom of the slot, offset by half the slot width, then intersect plane with walls and do a round "through curve".
 
Ops, sorry I tried with WF5.0 preproduction and it worked also with a simple round and half cavity as a radius round, so maybe the problem is your version of pro|E, or the fact that you have some chamfered holes near the slot..
 
Hmmm I checked and it works perfectly with WF5, what version of ProE are you using? I can't check WF4 right now :/

Paolo
 
A way to do this using the round command is to make full rounds on the ends of the slot and a full round on the bottom. Create a second round feature for the corners where the round sets meet using the surfaces of the rounds or the corner edges that are created.
 
Make the extrude rectangular. Then add the 0.155" radii at the bottom at each end. Then add a full radii between the two bottom edges which should wrap around the previous radius to the top.

you might want to add some relations between the slot width and the first radius to maintain your design intent if the slot width changes.
 
Thanks for all the responses. Unfortunately, I am working in the student edition and can't open commercial files. I attempted zpaolo's suggestion but my lack of experience with P/E and rounds has me struggling and I probably need a step-by-step tutorial.


I see there are three rounds. What exactly are they? I was trying to do it with one round set. Sorry for my lack of experience.


Terry
 
The student edition should be able to open commercial files, it's the other way around that doesn't work. The issue is that you're on WF2, they are on later versions.

I've attached a WF2 part for you to review. The full round didn't work as I expected, but I was able to round it at .155"

2009-09-15_111435_rounds.prt.zip
 
no need to apologise terry, pro-e confuses even the most experiences pro-s on this site from time to time! Try playing around with the rounds in different ways You may find one way works better than the other. For instance try making the extrusion as a square as posted above and then round the side edges first, ends second and vice versa. You realise you can create as many sets of radii in one command too ?
 
[-Skint- said:
] For instance try making the extrusion as a square as posted above and then round the side edges first, ends second and vice versa.
Click to expand...

That's what I did: a rectangular slot, then full round on the sides, then a round on the bottom edge with the right dimension. I think the problem is WF2 but I can't check it.

Paolo
 
I'll try my best to explain the "through curve" method, I don't have ProE at hand right now... First you create the slot, then add full rounds for the short edges, like in the picture I posted before.

Then you create a datum plane that is parallel to the bottom plane of the slot, but offset of half the slot size (radius of the wanted round).

You edit/intersect the plane with all the walls of the slot, you have to first click the plane and one face, intersect, add other faces.

Once this is done, select the bottom edge of the slot, do a round, go to the "set" panel and click the "through curve" buttons. You should now be able to check the curve you created by intersecting before.

Paolo
 
I'll try your suggestions tonight or tomorrow as I am travelling today.


FYI. I am using WF4 Student Edition and a message pops up stating that I cannot open commercial edition files with it.


Thanks again,


Terry
 
tdekon said:
I am using WF4 Student Edition and a message pops up stating that I cannot open commercial edition files with it.
Click to expand...

Looks like I mistook someone else's post indicating WF2 for yours. I know that back in the 2001 student edition you could open commercial files. They must have changed it at some point.
 
The problem as I understand it is that the transition creates a sharp corner That causes the round to fail. If you increase the corner rounds to R.156 the full round will be created as you were expecting.


I can try recreating the examples in the student version if you would like to see them.
 
I am butting in late and I don't know if somebody has
already suggested it. I tried it with a sweep cut. Could do
it as one feature. I have done it in WF2 too. The sweep
trajectory will be an OBROUND section and the Cross section
profile will be a "J". with the radius of arc at J being =
Obround radius.
Just uploaded a video at http://www.youtube.com/watch?
v=82UUOYYauGQ&feature=channel
Edited by: SRINIVASANIYER1
 
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