I got a doubt regarding getting 3d model of that 2d drawing can any one support me how to draw a 3d model for this attachment
Using boundary surface would look something like this.
Model as the drawing and see how it looks.
Cut the cylinder with 2 spheres.
I have tried by cutting it with 2 spheres but I can't generate the same drawing as shown
Attach your model.
I believe the drawing you got is a "cheat".
And "sphere" may not be what they actually want.
draw a 320 r arc on one plane, and a 700 r arc on the perpendicular plane, and use a boundary surface. Clearly the "sphere" is a mistake.
Matt Lombard wrote: draw a 320 r arc on one plane, and a 700 r arc on the perpendicular plane, and use a boundary surface. Clearly the "sphere" is a mistake.
Matt Lombard wrote:
If you do what the print says or if you revolve cut two spheres at the location and size suggested by the print you will end up with the larger of the two spheres and nothing left of the smaller sphere.
As Matt says above this will have to be surfaced in one way or another.
Let's hear it for 2D!
The blue is direction 1 the purple is direction 2. You could probably also do this with a sweep, but it's easier with a boundary.
Could also be done with a revolve
Matt Lombard wrote:
And that's why he writes books on the subject!
I did a revolve cut.
I didn't check if both revolve would give the same result.
Revolve R700 on 320 center.
Revolve R320 on 700 center.
It looks the same if this is all you look at. Actually the revolve is better than the Boundary, because the Boundary is parallel at the ends. Slight difference, but it counts if this is an optical application.
But if you extend the surfaces, the two kind of diverge from one another, so the solutions are almost the same relatively close to the center. Funny how even simple stuff has complex answers.
It will yield different results. Difference in surface area is a little over 2 mm ^2.
Area: 107396.88 mm ^2 Perimeter: 1139.79 mm Part1.SLDPRT File: Part1 Config: Default
Area: 107298.93 mm ^2 Perimeter: 1139.80 mm Part1.SLDPRT File: Part1 Config: Default
In the 90 degrees how does it transition from the 320 radius sphere to the 700 radius sphere?
We now know the 2D drawing is wrong and my opinion there is not enough info to accurately model it. Here is a different approach where you have more control with a spline on the cylindrical surface.
Create base shape, then create revolved spheres, Split command for each sphere, then delete bodies.
Can we use cut Extrude command?
I cannot understand why anyone would want to model a toric, or someone else would recommend modeling a toric, with modeling methods in SW that don't include a revolve.
You are probably right, but you are assuming it is a toric surface. Even then the 2D drawing does not have enough info to build a model from it. Is it a 320 radius arc revolved to 1400 diameter or 700 radius arc revolved to 640 diameter?
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