Does anyhave have or remember the formula for calculating springback on “x” glued- up plies, where the form is curved? I believe it involves the number of plies and radius of curve.
I need it for rocker chair curved feet, and for a bow-front dresser. Thanks!
Replies
I don't remember if he gives an exact formula, but Chris Gochnour describes how he compensates for springback in, I think the second, of his three-part video on laminations.
http://www.taunton.com/finewoodworking/SkillsAndTechniques/SkillsAndTechniquesDirectory.aspx?dir=Bending+Wood
http://www.woodweb.com/knowledge_base/_Spreadsheet_Calculation_Program.html
Using a stiffer type glue that doesn't creep will give better results and thinner plies will give the least springback. I've done it with no springback. You can also prebend the strips to minimze springback. Guitar makers often use a heated pipe to bend the sides to shape. You just apply pressure to bend the strips as you pass it over the pipe back and forth. A propane torch from behind heats the pipe nicely.
thank you Rick.
I knew it was out there somewhere.
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