Quilt clamp help

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Quilt clamp help

Postby dah79 » Fri Feb 08, 2019 2:48 pm

I am trying to make a compression clamp for a quilt hanger similar to the attached picture. The finished part is going to be 1.5" wide x 2.5" tall x .72" thick. I have modeled up the clamp on edge the way I would like it to be, but I want to machine it flat from .75" stock using 2 sided machining.

I cannot figure out how to do this. I am attaching the file if anyone can help me. Thanks.
Attachments
clamp.jpg
clamp.crv3d
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Re: Quilt clamp help

Postby Phil » Fri Feb 08, 2019 2:50 pm

Not to be a wise guy but I would use a band saw.

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Re: Quilt clamp help

Postby TReischl » Fri Feb 08, 2019 3:07 pm

From what I can see in that pic you have a concave side and a convex side.

Machine the concave side first then flip it over and do the convex side.

Just use a stop strip to locate it when you flip it over.

Other than that, I am not sure what has you stumped?

By the way, that is not a real good design in that picture. The grain is running the wrong way. Grain on clamps like that should run 90 degrees to what is shown. Much less prone to splitting.
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Re: Quilt clamp help

Postby SteveNelson46 » Fri Feb 08, 2019 4:47 pm

Use a 2 rail sweep using the top and bottom horizontal lines. Flip it over and do the same on the other side (inverse). This example is not drawn to your dimensions.
Attachments
2 Rail Swep Example.jpg
2 Rail Swep Example2.jpg
Bottom.jpg
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Re: Quilt clamp help

Postby dah79 » Fri Feb 08, 2019 6:05 pm

Thank you for the suggestions. I don't have a bandsaw. Good point on the grain direction too, though there shouldn't be a lot of pressure on these.

I like the two rail sweep idea the best, so far, but is there a way to get the radius on the ends?
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Re: Quilt clamp help

Postby TReischl » Fri Feb 08, 2019 10:21 pm

To get radii on the ends modify the cross section vectors to include the desired radii.
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