How can I extend the base of a rectangle?

How can I extend the base of a rectangle?

autodesk_pat
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Message 1 of 7

How can I extend the base of a rectangle?

autodesk_pat
Observer
Observer

I have two rectangles that I've extruded to different heights. I would like to taper the center rectangle to meet the bottom rectangle so that the angle is not 90 degrees. Importantly, the top face of the center rectangle cannot change dimensions.

I'm not even sure what to call this. Reverse fillet?

 

Annotation 2023-11-15 074230.png

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Message 2 of 7

davebYYPCU
Consultant
Consultant

Use chamfer or Draft Tools, extrude with taper from a bigger sketch.

 

Otherwise a sketch on the top of the large base, and loft to the top face  - as join.

 

Might help….

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Message 3 of 7

TheCADWhisperer
Consultant
Consultant

@autodesk_pat 

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

TheCADWhisperer_0-1700055314886.png

 

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Message 4 of 7

autodesk_pat
Observer
Observer

This is literally the most basic example I can think of, but I need to use the concept in real designs in a few different ways.

 

Notably, the taper shouldn't go all the way to the edge of the large base, but to an arbitrary point some distance away from the center rectangle. I'd like to be able to also specify whether the taper goes to the top of the center rectangle (as you show in your image) or some arbitrary distance up the side faces.

 

@davebYYPCU Can you be more specific with "use draft tools" or "chamfer"? I only have about 3 days of experience learning Fusion 360.

An additional hurdle: in my real application the two rectangles won't always be centered on each other. I also have the case where the shorter rectangle is a "support" to the larger one, and I would like the support rectangle to go some distance up (shown below) and then taper to meet the large one (can't figure this part out):

autodesk_pat_0-1700056813064.png

 


So picture a triangle of sorts going from the top face of the right rectangle and meeting the side face of the left one at some arbitrary height.

This may be two different questions so sorry if I'm over-complicating, but in my mind it seems like it should be a similar operation.

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Message 5 of 7

TheCADWhisperer
Consultant
Consultant

TheCADWhisperer_0-1700057953268.png

 

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Message 6 of 7

g-andresen
Consultant
Consultant

Hi,

have a look

 

 

günther

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Message 7 of 7

davebYYPCU
Consultant
Consultant

Ok, some simple steps, presumes both blocks have become one body. 

 

Chamfer, select the intersecting (inside) edge of the top face small block.

There is default at 45 degrees, or the other options, two distances, or distance and angle.

Either of the option versions, add particulars as needed.  Only works on a single body.

 

coeo1.PNG

 

 

Draft, select outside tall face of the smaller section, then the top face, (the one moving is always second selection.  Set the angle required.  (This one keeps the new material joined to the hinging line).  Will work if separate bodies.

 

 

coeo2.PNG

 

So many ways to get there, but play round with the settings.

 

Might help….

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