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lmcgill2@uiuc.edu
science forum beginner

Joined: 31 May 2006
Posts: 5

Posted: Mon Jun 12, 2006 9:30 pm    Post subject: Force/Torque required to coil spring around mandrel.

I have seen springs coiled using an electric drill clamped in a vise
and the wire is fed by hand (so the springs aren't precise) onto a
mandrel being spun by the drill. My question is how can the required
torque of the drill be calculated based on material/geometric
properties of the wire. Does anyone out there want to give this a shot?
Any help would be very appreciated. Thank you, Lucas.
Brian Whatcott
science forum Guru Wannabe

Joined: 09 May 2005
Posts: 267

Posted: Tue Jun 13, 2006 3:20 am    Post subject: Re: Force/Torque required to coil spring around mandrel.

On 12 Jun 2006 14:30:40 -0700, lmcgill2@uiuc.edu wrote:

 Quote: I have seen springs coiled using an electric drill clamped in a vise and the wire is fed by hand (so the springs aren't precise) onto a mandrel being spun by the drill. My question is how can the required torque of the drill be calculated based on material/geometric properties of the wire. Does anyone out there want to give this a shot? Any help would be very appreciated. Thank you, Lucas.

You are essentially asking how to find the minimal force which will
plastically strain a specimen of the kind you are interested in., in
bending. Given this force, at this radius of mandrel, allows the
torque to be estimated, does it not?

Brian Whatcott Altus OK

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