Match Shape Feature

[bmichell]

I am unable to have an extruded block with a flat bottom attach to a curved surface created by a revolution without a gap being present between the surfaces. The match shape feature in the extrusion is grayed out. Can anyone help with this situation? I've attached the sketch.

[chadwickt]

I am a little unclear on what the final result should be. Should the flat bottom of the shape extrude straight into the curved surface? This leaves an extra flat surface that I am not sure you want.
Check out the pic and let me know if this is what you were wanting, or explain what should be different.
Thanks!
Tracy

[jonathan.landeros]

I am a little unclear on what the final result should be. Should the flat bottom of the shape extrude straight into the curved surface? This leaves an extra flat surface that I am not sure you want.
Check out the pic and let me know if this is what you were wanting, or explain what should be different.
Thanks!
Tracy

I'm not sure I understand what you're going for either, but Match Shape is used to terminate a n open sketch onto another solid. (see attached). It's one of the ways that an open profile can still create solid geometry. It was introduced in R9 I think.

The other option would be to use an offset workplane and extrude to the cylinder using the 'To Next' option.

[bmichell]

Gentlemen,


Thanks for looking into this situation. I am importing sketches from ACad. I can revolve the main body ok but am having trouble with a small lug that is on the top of the body. As this is a forging the lug is forged with the body and I need to reflect this on the model. The lug has straight sides that extend to the body and there is a radius to blend into the body. As the lug is on the sketch already and has geometry which contains angles and curves, I though it would be easier to extrude the lug from the centreline to the required width. When I do this the lug touches the body at the centre, but the outside surfaces do not touch the body. The match shape feature won't work for this problem. I hope this is clearer than before.

This is a typical modelling feature that I will need to do for my products. I have made similar lugs using a work plane inside the body, but removing the material to get my lug shape was too time consuming.

Any ideas would be helpful.

Brad

[jonathan.landeros]

Gentlemen,


Thanks for looking into this situation. I am importing sketches from ACad. I can revolve the main body ok but am having trouble with a small lug that is on the top of the body. As this is a forging the lug is forged with the body and I need to reflect this on the model. The lug has straight sides that extend to the body and there is a radius to blend into the body. As the lug is on the sketch already and has geometry which contains angles and curves, I though it would be easier to extrude the lug from the centreline to the required width. When I do this the lug touches the body at the centre, but the outside surfaces do not touch the body. The match shape feature won't work for this problem. I hope this is clearer than before.

This is a typical modelling feature that I will need to do for my products. I have made similar lugs using a work plane inside the body, but removing the material to get my lug shape was too time consuming.

Any ideas would be helpful.

Brad

Is there any reason you can't tweak the sketch so it's partially buried inside the cylinder? This fills in the small gap without major modifications to the model.

See attached.

[bmichell]

I have buried sketches and placed work planes inside existing geometry in the past. I was wondering if Inventor had a way to recognize that I wanted the geometry to touch. Maybe in later releases.

Thanks for your input Jonathan


Brad