need help on filleting using solidworks 2004 2

[ngkw1]

Hi. I am new here and I hope someone can help in this.
I am not able to fillet a corner (a point) for a part i.e.
a point where 3 surfaces meet. I can chamfer the corner though as the vertex selection is available. I would appreciate very much if anyone can help me in this. Thank you.

 

[Theophilus]

Have you selected all three edges? Also, will it work if you use a smaller fillet?

Jeff Mowry

http://www.industrialdesignhaus.com

Reason trumps all. And awe trumps reason.

 

[CorBlimeyLimey]

You cannot add a fillet to a vertex without also selecting the adjoining edges. There are probably ways to do it, but it is not a simple two or three click operation like the vertex chamfer is.


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[ngkw1]

Thank you for replying my query. I hope I am able to
fillet it because it seems so simple. I did it with
other software with just selecting the vertex and run
the filleting which convert it to a 3D fillet years ago. However, now I am using solidworks 2004. I did what Theophilus said but they fillet all the three edges i.e.
the entire edge is filleted. I just want a corner fillet.
I have tried selecting various edges including adjoining
edges, the fillet process just fillet the everything. I just want a corner that's all.

 

[ctopher]

http://www.capinc.com/pages/support/documents/ArtofFilleting2005.pdf

I have seen a corner done. Still looking for the info.

Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-05)

 

[meintsi]

Look into the variable-radius fillet.

Remember...
[navy]"If you don't use your head,[/navy]
[navy]your going to have to use your feet."[/navy]

 

[ngkw1]

Thanks for trying to help. I could find a corner from thr pdf of ctopher that involved a point where 3 surfaces meet.
I did notice something like a corner fillet where 3 surfaces meet but it has the edge all filleted as well.
The corner fillet will should create a 3D fillet with a fix radius and end with all edges that come to the corner
point still sharp and not filleted. It's like a chamfer but
instead of flat, it bulge slightly and smoothly.

I think meintsi advice is what I suspected ito be the possible solution but I do not how to do it. I tried to select 3 edges with variable radius and try to set the first vertex to have a radius and the rest none but I did not do it successfully. I try to remove all the vertex and that also failed. I welcome any idea and approach.

 

[CorBlimeyLimey]

How about this?

http://www.mooload.com/new/file.php?file=files/260506/1148616730/Cube.SLDPRT

How do you intend to create the fillet on the actual part?


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[CorBlimeyLimey]

Or try this if MooLoad is still not working

http://www.savefile.com/files/8753355

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[ngkw1]

Hi thanks very much for all your help again. But I could not open the file. It says configuration data not available
and then future solidworks version. I am using Solidworks 2004.

Is it possible create an older version file

 

[CorBlimeyLimey]

Don't have SW04 but here's an image

http://img67.imageshack.us/img67/9977/cubewithfillettedvertex5ks.jpg

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[handleman]

I guess this sort of depends on your definition of a fillet. I think SW's "definition" of fillets are rounded faces tangent to two (or more) surfaces. The cubes posted here have rounded faces tangent to the cube edges rather than the cube faces. As such I don't think they fit SW's idea of what a fillet is. As far as the true definition of what a fillet really is or isn't I really don't have any idea.

My < $0.02

 

[ctopher]

I've always thought of a fillet as an inside "radius" and a radius as an outside "radius". So, there is "fillet" and "radius". SW just uses "fillet" for everything.

Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-05)

 

[CorBlimeyLimey]

I think it's geometrically impossible to have a spherical fillet/radius at the vertex of 3 or more edges/faces and maintain tangency to both the faces and edges.

That's why I asked how that feature on the actual part was going to be created.

The actual "fillet" would end up being some type of "eliptoid" surface. Maybe one of the "surface manipulation" functions (Dome, Shape or Deform) would work.


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[CorBlimeyLimey]

Sorry, that should have read, "Maybe one of the "surface manipulation" functions (Dome, Shape or Deform) would work on the surface created by a vertex chamfer".


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[ngkw1]

Thanks CorBlimeyLimey! That's the fillet I wanted to create
but one on one vertex and not so many. I can see the picture but I hope you can kindly explain the process of creating it using solidworks 2004. As for whether geometrically possible to have a fillet on a vertex of 3 or more edges meet, it is possible. If consider something of diamond shape with multi-facet and multi edges meeting at various vertex. Each vertex need to be machined to have a slight fillet to avoid sharp edges which can caused problems like chipping off. You would like to create fillet vertex by vertex rather variable radius fillet, etc as this will be time consuming and tedious. You may say select everything and do a filleting but you do not want to fillet the edges but just the vertex that multiple edges meet.

 

[CorBlimeyLimey]

A true spherical & tangential-to-everything radiused vertex is not possible, but I agree a non-spherical multi-faceted one is.

If you can accept multi-facets, then just do a vertex chamfer, then radius the edges created by the chamfer.

http://img463.imageshack.us/img463/3451/vertexwithradiusedchamfer3zq.jpg

The first version (SW05) I posted involved;
1) Creating 3 separate 2D sketches with matching radii on the 3 surfaces adjacent to the vertex.
2) Creating a 3D sketch from those radii.
3) Creating a surface fromt the 3D sketch.
4) Cut-thicken the surface to remove the vertex.


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[handleman]

ngkw1:
The key here is constant radius. You can't round off a corner in such a way that the rounded surface has constant radius and is tangent to all 3 of the converging surfaces. A constant radius surface that rounds the corner where three orthogonal surfaces meet will only be tangent to the three edges that meet at the vertex. You may be able to create some complex surface curve that is tangent to all three faces, but it sure won't have a constant radius.

 

[ctopher]

I think another crude way is to create a chamfer on the corner within Weldments, then fillet the edges of the chamfer.

Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-05)

 

[ngkw1]

Thanks for quick reply. CorBlimeyLimey approach is scary if
I have a number vertexes to fillet. Is there any other way which is more efficient? As for handleman statement, I am not sure about whether the constant radius or not. However,
theoretically, if I look from the top (top surface) and there is fillet with radius 10mm and then to the front (front surface) and I see a 10mm radius fillet and then
to the right side (right surface) and I see another 10mm
radius fillet, I would consider that constant radius. Similarly, CorBlimeyLimey approach did the same i.e. get 3 sketches with the fillet of the same radius from three different views then sew or blend the fillet to form a
3D fillet. Then convert it solid.

I appreciate the creativity in generating the fillet but is there any easier direct way or any functionality in Solidwords that can do that?