Hello! I have big troubles with modeling this globe valve(robinet). Especially the middle zone with that "inside" of sphere. Can anyone help me? I will apreciate!
Upgrade: I made this for the moment! (see attachament)
Paul, I modified your model to show how I was originally thinking of doing that section. It is similar to your Rev1 but it doesn't need an additional fillet after the cut loft.
I've been meaning to take a crack at this but i haven't had any time. I think it might be best to model the inner wall and the flang on the side as one body, and model the outer wall and top flange as a separate body. I can't really tell at first glance but hopefully the wall thicknesses are constant so you could use shells. Then merge the two bodies, add the 6 mm rib, and add fillets.
If you have time in a day, i will apreciate a crack. Btw thanks!
from a quick look, I see a central solid,
with a cavity to the square flange-
so I would think model the cavity as a surface(one half and mirror),
and knit to a single surface-
then model the inner ball and outervalve body, without merging to the cavity model-
then when the body is finished cut//split it with the cavity surface-
delete the unwanted parts-
and depending on how you've got there, you may need to
repair/patch some parts- as JS pointed out it would need
a bit of dedicated time to get it correct-
hope this helps to get you further- have a good'n kelef
That's a mind-bender to sort out.
OK, first thing is, break this thing down into features and try to write a description of it.
this part consists of a housing which opens to a circular mounting flange, a nested hollow elbow connected to a square mounting flange and a manifold.
The manifold consists of 3 tubes intersecting at right angles (front view), on top-of which is a hollow sphere outer housing (A-A), the inside of which contains a hollow spherical elbow with a trumpet shaped flow tube (B-B) that opens into a 4-hole square flange on the left of the part(front view), and joins to the housing by a connecting vertical web of material(C-C). The other orifice of the interior elbow is vertically situated and positioned above the equator of the elbow and opens into a chamber that includes the interior walls of the housing beneath a cylindrical pipe that rises to an o-ring or sealing seat which is part of a 6-hole circular bolt flange (A-A)
The three-tube intersecting manifold consists of a large orifice that flows from back to front tapering as it does (A-A), a tube protruding to the left that terminates at the centerline of the main orifice (front view) and on the open end exterior, has a stepped boss to facilitate a coupling c-bore (B-B). The third tube rises vertically from an opening beneath the part with coupling c-bore, intersecting the main orifice and opens beneath the nested, hollow elbow into the chamber inside the exterior housing,(A-A).
That generally describes the part.
The next difficulty is correlating your dimensions. For a part where you have a 2D print to work from, I recommend doing orthographic sketches on the front top and right planes to capture the dimensions, similar to the way the drawing is laid out, only I would suggest you you put every dimension on your first view that can meaningfully be placed there and the same with your second and the same with the third. The reason for this is so that you can make your first view fully defined and then use sketch relations to constrain the subsequent views. In this way, you only have to include each dimension once and you won't have to worry about dimensional changes (for errors or design changes down the road) not propagating to your other views correctly.
That will make it much clearer how geometry from different views relate. From that point, you can begin to create your planes, profile sketches and features.
I recommend this order of operations
webs and ribs
large fillets and chamfers
small fillets and chamfers
This is a general guideline obviously-it may not be suitable for all parts or circumstances, but I hope it helps.
Thanks. I never saw a trumpet shaped flow tube. It is hard to imagine that shape. It is a revolution shape? I see there a lot of radius dimensions, but i don't have the center of radius coordinates. Any tip for that portion in modeling? It is a 180 degree revolution?
Btw I uploaded the part in wich stage is now.
Thanks a lot!
I am thinking 180 degree revolve for the bottom, since that is cylindrical. but the top does not appear to be cylindrical - it does not appear to be fully detailed in that drawing.
I was thinking of using a loft for that portion, with a guide curve for the top that is defined in the drawing.
from the iso section, it looks more like an extrude in that area. my first attempt is attached (I did not bother with bolt holes).
Thank you. It seems looks okay. Maybe that is an extrude. If you get another version put it here.
Hello! Morar Ciprian,
It is also possible to model this tricky Globe Valve Body Model by using simple revolve and extrude features.
That also most precisely to achieve precise detail drawing. you can refer the attached Model and drawing.
I managed to model everything per the PDF file -- SW 2014 SP 3.
The 8mm "Flow Diverter" feature in the section view is a little tricky - the drawing doesn't show if it's a straight fillet or a curved fillet. It also doesn't show (well) how the other internal fillets (2.5mm "default") interact with the "Flow Diverter".
I believe this is modelled complete - you may need to adjust features as your requirements specify.
One deviation: material modelled is Cu Sn 8 - drawing calls for Cu Sn 10 - hence the model weight is about .3 kg heavier.
I hope this helps.
So the trumpet shape flow tube (radius 30, radius 30, radius 8) is a revolution feature on 180 degrees or a extruded feature?
Thanks a lot to you all for the previous answers.
Extruded trumpet inner:
Revolved trumpet inner:
obviously, I think it is extruded. here are my reasons (in no particular order)
1. in the iso section view, the surface on top of the trumpet looks extruded.
2. an extrude leaves more open volume in the trumpet.
3. they did not call them out as spherical radii.
About #2 and #3 Jeremy, I'll totally agree with you on those. Regarding #1, well, um, that ISO quarter section view is kind of wonky in my opinion. I don't think there's much to go on there -- I'm on the fence.
For my next trick... how do you go about adding the linear rads inside a round tube? As the rads sweep out, their perimeters change shape. I'll give it a looking at for a bit this morning.
Here's my Rev 1. I've replace the revolved cut with a swept cut that should more closely replicate the intended profile.
I hope this helps. =8o)
*facepalm* Yes, that makes more sense - use the whole opening on both sides for the loft profiles.
this straight line in the iso section is what I am referring to...
To me, that looks like a linear boundary between flat top of the inner ball chamber, and the 8mm linear rad. By linear, I mean as represented in the example below. Again, the 8mm rad was not specified as spherical, so I was assuming it was linear.
I have to agree with Jeremy. One more reason is that if you section the revolved version then you'll see there would necessarily be an extra line as shown below.
Here's my attempt at this....SW2015
Sorry Kevin, I can't open a 2015 file - only have 2014. Otherwise, I'd like to see your solution.
This part was a challenge, I liked it.
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