Groove problem on an Inventor 2014 cylinder

2D plans Layout
1

Hello

I'm currently working on a diploma and I encountered a small problem on Inventor 2014 that I can't seem to solve.

I have a cylindrical piece on which two grooves are extruded. I made these grooves from a plane tangent to the cylinder and with the "Engraving" function to be able to adjust my 2D sketch to the face of the cylinder.

The problem occurs when mounting an axle (in orange) in this groove. I put a tangency constraint between the axis and the groove, but Inventor gives me an error  and I don't understand why it doesn't work.

 

Here's the error message: "The new relationship conflicts with the existing relationships of the whole."

 

I asked my teacher, but he doesn't have time to help me and just told me that tobe perfect, you have to generate the groove from the position of the axis and perform a scan of the exact shape. But I have no idea how to proceed.

 

If you have any solutions, they are welcome!

 

Thank you


capture.jpg
1 Like
2

Hello, this type of constraint is also a problem on SolidWorks. A solution can be to put a constraint with a limit distance (maximum distance) between the two faces and if it doesn't work between the face and the edge of the flat, and otherwise between the axis of the axis and the two faces of the groove of the green part with a symmetry stress.

3

Hello

To be sure of what I'm saying you'd have to have your outfit.

I think your problem comes from the 2D extrusion you created on your cylinder.

This cannot be tangent to your cylinder and that's why you have a constraint conflict.

To achieve this, I think you should create an ellypsum on this cylinder, position a point that will correspond to the start of your groove and an end point for the end.

Then you create a plan at the starting point and perpendicular to your ellypse and the same at the finish there should be no more than to make a sketch on your starting plan with extrusion I at the arrival plane.

I'm not totally sure of what I'm saying but it should work.

Have a nice day

4

Your solutions probably work, but what I'm looking to achieve is to have exactly the right groove for my axle.

And to do this, it would be necessary to scan the path that the axis would take along the cylinder to have a groove with an angle of XX°

 

Because in the end the gray axis on the photo will be mounted on a motor and the green part will have to make an up-down movement thanks to the orange axis that will follow the path that the groove forces it to follow

5

That's exactly what I said

You create an ellypse on the outside of your cylinder and then a stopped scan on this ellypse.

6

Here's what I understand from your explanations.

Make a drawing or something because I don't see what you're getting at


capture_2.jpg
7

With my apologies when I was talking about ellypse in fact I meant helical curve.

And so you do a sweep on this curve.

8

Here's what it could look like

hoping to have helped you


courbe_helicoidale.jpg
2 Likes
9

Hello.

Your sending by engraving is a very good idea (damn it lacks this function on Solidworks). On the other hand, indeed, tangency should not be the best solution.

Have you tried with movement or transition constraints? There must be an ideal relationship for that, of the cam path type. 

 

http://knowledge.autodesk.com/support/inventor-products/learn-explore/caas/CloudHelp/cloudhelp/2015/FRA/Inventor-Help/files/GUID-CD8AE8A0-03F0-468A-BE85-D7C5B989BA0B-htm.html

1 Like
10

@Franck51:

Thank you for your help, I was able to solve my problem thanks to your image! I didn't know how to go to make my grooves and your image helped me a lot.

 

@coin37coin:

I had already done this exercise in class and I tried to reproduce it on my cylinder, but it's a little more complicated.

 

1 Like
11

@coin37coin

The engraving function in SW must be the winding function (to be found in the drop-down menu)