Complex sketch on the outside of cylinder

[Anonymous]

Hello!

I am fairly new to Fusion 360, even though I've done a few models already, but nothing as complex as this cogwheel. I'm attaching the f3d file and two pictures of the original part that I am reproducing. I've measured and modeled everything except the curved tunnels on the side of the cylinder.

They are indetical, just mirrored on two sides, however Fusion doesn't allow to sketch directly on the side of a cylinder and I can't seem to project the sketch I've made of the tunnel onto the cylinder properly. Before posting I looked at other topics here on the forums, but I couldn't manage to make it work.

The closest I got to properly projecting it was using Project to Surface, but for some reason I couldn't figure out myself - it projects all skewed onto the cylinder.

Any help on the matter is very much appreciated, thanks!

[Anonymous]

Hello!

I am fairly new to Fusion 360, even though I've done a few models already, but nothing as complex as this cogwheel. I'm attaching the f3d file and two pictures of the original part that I am reproducing. I've measured and modeled everything except the curved tunnels on the side of the cylinder.

They are indetical, just mirrored on two sides, however Fusion doesn't allow to sketch directly on the side of a cylinder and I can't seem to project the sketch I've made of the tunnel onto the cylinder properly. Before posting I looked at other topics here on the forums, but I couldn't manage to make it work.

The closest I got to properly projecting it was using Project to Surface, but for some reason I couldn't figure out myself - it projects all skewed onto the cylinder.

Any help on the matter is very much appreciated, thanks!

[Anonymous]

Hi,

     Try establishing new planes at the "Z" stop/start locations of the notch, and then "tangent" planes 180* apart on the cylinder section.  Finally, on the tangent planes in conjunction with the cylinder, use the "coil" feature.  I've done a similar helical grooved model using Fusion with success...but it's definitely a challenge.  Hope this helps.

[Anonymous]

Hi,

     Try establishing new planes at the "Z" stop/start locations of the notch, and then "tangent" planes 180* apart on the cylinder section.  Finally, on the tangent planes in conjunction with the cylinder, use the "coil" feature.  I've done a similar helical grooved model using Fusion with success...but it's definitely a challenge.  Hope this helps.

[Anonymous]

Creating new planes like that I feel is definitely a step in the right direction. But I don't see how I can achieve the exact same shape using the coil feature. 😕

[Anonymous]

Creating new planes like that I feel is definitely a step in the right direction. But I don't see how I can achieve the exact same shape using the coil feature. 😕

[davebYYPCU · Accepted solution]

If your 2d sketch was accurate, can be done with Sheet Metal, unfold, then extrude cut, then refold, and use the faces to make the cutting tool.

It is a 2 x Circular pattern, not really a mirror.

Step up the timeline....

[davebYYPCU · Accepted solution]

If your 2d sketch was accurate, can be done with Sheet Metal, unfold, then extrude cut, then refold, and use the faces to make the cutting tool.

It is a 2 x Circular pattern, not really a mirror.

Step up the timeline....