projection from this assembly?

len_friedland

Hello,

I'm new to Onshape. I very much want to switch to this CAD system and have started working with it. Please don't be offended if I ask questions regarding its capabilities.

For my first project using the system, I modelled a stepped shaft with a hole in it.

I have stamped cups that must be placed on a mandrel, with a roller fed  up to the outside diameter of the cup, embossing a logo. Afterwards, the cup sticks to the mandrel and is difficult to remove. So I made a simple cam to pop it off.

The shaft is here at https://cad.onshape.com/documents/b85499452b334240b03828e6/w/9c8be78133584ae098ab0394

That's as far as I got because I couldn't access the geometry of a cylinder and a hole. That's in a previous post and not relevant here. I did the rest with pencil and paper.

Pics of the finished product are here:

http://abnycut.com/shaft/cam_assembly.jpeg
http://abnycut.com/shaft/cam2.jpeg
http://abnycut.com/shaft/closed_assembly.jpeg
http://abnycut.com/shaft/open_assembly.jpeg

My question is this:

After modelling the shaft and the brass ring, is there a way to project the cam profile from the assembly of the shaft and brass ring onto the top plane? It would look something like the capital letter D, which is the profile of the cam.

As it was, I made the shaft and ring, then measured from the far end of the hole until the flat of the ring, and ground the flat on the cam to this dimension. It would be more efficient to just generate generate the profile from the assembly, then offset the flat for .010" clearance, and give those prints out to the shop, as the work could go on concurrently on all parts.

The parts are certain to be revised for varying cup material dimensions, so it is relevant even now that the assembly is made.

Thanks for any information on this.

andrew_troup

@len_friedland

If I understand you correctly, the command you are looking for is "Use (Project/Convert)"


Things become more interesting when the original plane and the destination plane are not parallel.

"Use" projects normal to the DESTINATION plane

If you want to project a profile normal to the ORIGINAL plane, you can extrude the profile as a surface, "Up to" the destination plane, then "Use" the edge of the resulting surface in a sketch on the destination plane.

brucebartlett

Do it as a multi-body part and link your parts with in the 1 part studio. 

I copied and modified you doc too what I see the the pic's. RMB my tab, copy to clipboard then paste in your document to see what I have done. 

https://cad.onshape.com/documents/a0fcfc93074d4e97a8fe7d2f/w/9fd815ea

430347118d9f5210/e/8a4d49290e44410eab549d62

len_friedland

Thanks Andrew and Bruce.

Bruce, I'm new this. What does RMB mean? I tried pasting the link into my Onshape, but I just get my old part and not yours.

cadmando

Right Mouse Button

len_friedland

Got it. I went to public, searched for cup_mandrel, and chose your copy.

Thanks! I'll study it over the weekend.

len_friedland

cadmando said:

Right Mouse Button

Duh! Thanks!