AutoCAD Inventor :: Holes In Curved Surface

Sep 30, 2013

Basically I’m trying to create a circular cut in a flat pattern for a hole made in a rolled piece of sheet metal.

I have created a "case" (this is what we call it) to mount an axial fan, it will require holes for mounting the motor plate. When I create these holes in the rolled case assembly they appear to be fine, but when I flatten it they are turned into two sets of semi-circles or ellipses.

This is only a problem when we run the parts on our Laser; the laser will attempt to start the cutting at the end of each of these "semi-circles" causing a hotspot where the two semi circles meet. This causes the hole to be slightly smaller than intended in this area causing great difficulty inserting bolts, they normally require drilling.

 Our material thicknesses vary from about 3mm to 8mm.

I’ve included a crude example of what I’m trying to achieve. To really see what I mean, place the file into a Drawing file and zoom into the hole. I couldn't add the file, with only 3 features the file was 5mb in size.

By the way, I have a temporary solution, it's just a little complicated. (My solution: use square holes first in the un-flat, use the diagonal lines from each corner of the square in a sketch on the flat pattern to place a circular cut on its mid points.)

Intel Xeon 3.0GHz (4 Cores)
nVidia Quadro 2000 (1GB) - Dual Screen
8GB RAM

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AutoCAD Inventor :: Extrude To Curved But Without Curved Resulting Surface?

Aug 6, 2012

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AutoCAD Inventor :: Curved Surface - How To Increase Volume Of Surface At Certain Points Only

Apr 10, 2013

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Now at certain parts, I would like to increase the thickness and then blend it the rest of the surface(may be chamfer its edges) .

At certain parts on curved surface I would like to add an extra mm, I think if the surface was flat I would just sketch the shape, then extrude it by few mm and smooth the edges by doing a chamfer

But how can this be done on surface that is curved? Or multi curved for edges?

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AutoCAD Inventor :: Ribs On Curved Surface / Trimming To Complex Surface

Feb 28, 2013

I'm designing a press for a skateboard similar to: Rib Press

I have the board modeled: (see attached)

Now what i want to do is generate those ribs as seen in the picture.

I tried creating a block that intersected with the board and tried to split the rib at the surface, but to no avail. I think the issue has something to do with the curve of the board in two directions, but i can't seem to get it right.

if you are having trouble visualizing what i'm asking about, look at this. I want to be able to figure out the exact shape of those center ribs to print and eventually cut out of wood.

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AutoCAD Civil 3D :: Reduced Maximum Length For Surface Triangles Causes Surface Holes

Oct 22, 2012

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I thought well maybe it's because i should've reduced my max triangles first then added breaklines. Would this matter? I also thought I could add a line to the surface to fix the holes vs. deleting surface lines along the entire edge of a surface for many many miles.

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AutoCAD Inventor :: Loft To Curved Surface

Nov 7, 2009

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Jul 8, 2013

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Apr 27, 2012

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From other cad software history, I could draw it on a straight plane and tell it wrap around the part of whatever diameter. But, since I have not attempted this in Inventor I don't know if this exists.

Just for reference, this is a twist lock device. Turn the cylinder, advance a key the is inside the zig zag advancing or retracting the part that is inside the bore attached to said key.

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AutoCAD Inventor :: Flattening Part Of Curved Surface?

Dec 22, 2012

I am trying to design a new mold for some sailing rudders I am building. The files I have for the current molds are in the IGS format, which Inventor can open. The current rudders are convex going from the widest part of the foil down to the trailing edge. The goal is to create another model with this flattened. If I were doing this in logic it would be: Find max height, alter foil to be straight from max height to trailing edge. I have tried everything I can do to make this happen with no avail. what would be optimal is if I could get it set up so that I can easily control the amount of convexness to the aft section, but the primary goal is to just get it to be straight. The trailing edge is the straighter one.

The final goal is to export to g-code and send off to a cnc.

I have attached the files after I have imported them into autodesk, but below is a link to the original iges files.

[URL]

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Oct 29, 2012

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AutoCAD Inventor :: Draw Ribs On Curved Surface

May 24, 2012

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AutoCAD Inventor :: Plane Tangent To Curved Surface?

Oct 2, 2012

I'm designing a part, and am having trouble creating a plane tangent to a curved surface. One option for creating a plane says "Tangent to Surface through Point", which in theory I should be able to use, but I can't figure out how to actually place a point there before in order to create a surface at the point.

Basically I am trying to cut a circle into the curved right side of the part

I've attached the part file for reference.

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Mar 23, 2012

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I am using IV2009.

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Aug 16, 2012

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Aug 16, 2012

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Also how do i make the letter's bigger when I sketch them? even though I put in large numbers such as 50 in the size box, the text does not appear big. Also, how do I increase the spacing between the letters? 

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Jul 20, 2012

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Nov 20, 2013

I am drawing a fan wheel. The fan blade is curved intersects the shroud, consisting of two cones. I do not know how to trim the blade to the cones. I tried to "split" the blade at the cones and then "delete face" but then the "Go to flat pattern" section on the ribbon is missing. If I suppress the "delete face" feature the "Go to flat pattern" re-appears.

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May 22, 2013

I am trying to make support ribs on a curved plastic surface to make the construction stiffer for a snow puncher. 

(Just like on the attached picture, "pic 1".) 

But I am having trouble doing this over the curved surface towards the top end of the rib.

As is now I sketch the shape of the rib in both ends and loft it over a sketch (see attached picture, "pic 2"), and then revolve to get the ends.

But this gives problems, result is not good and it's very time consuming.

If this was on a flat surface it would be easier, but now I get a lip along the loft and along the revolve on the top end of the rib.

I'm using Inventor Professional 2013 Student Version.

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Sep 2, 2013

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AutoCad 3D :: Make Curved Surface A Flat Surface?

Oct 19, 2011

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Jun 21, 2013

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Feb 4, 2013

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P.s. I have hp I7 processor, 8 gb ram, windows 7 and am using autodesk inventor pro 2013

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AutoCAD Inventor :: Create Work Axis Where Work Plane Intersects Curved Surface?

Sep 9, 2013

I keep running into a situation where I would like to be able to create an edge or a work axis at the intersection of a work plane and the surface of the part.  I figured out a work around if the surface is flat, but I haven't figured out a work around for a curved surface.

How do I create work axis where work plane intersects curved surface?

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I need to be able to draw a 2D sketch on the work plane, but get a perfectly matching projected line onto the work plane, from the curved surface, at the intersection of the curved surface and the work plane.

The attached jpg shows the intersection in question.  I circled it.

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Nov 27, 2013

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[URL]

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AutoCad 3D :: Export Curved Surface From 3DS MAX

Jun 13, 2011

I have a curved surface and I don't know a right way to export it. If it like Editable Poly then I have a mesh in DWG. Then I set to Faceted and optimized then merge faces (to receive one face) and then convert to surface but after that I have a surface with multiple triangles. This is one way which I use, I tried many ways but I have the same results.

This is what I have after export from 3DS MAX (same as DWG, SAT, IGS)
02_old.jpg

This is what I receive from splines and loft in AUTOCAD.
02_new.jpg

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Dec 13, 2012

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Aug 8, 2012

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Nov 25, 2011

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Apr 30, 2013

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Apr 18, 2012

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Jun 1, 2012

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Same Image material, Surface on left is curved and surface on right is flat. Warp.jpg

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