Before anyone gets there before me.
"A M16 bolt has a dia of 50mm and at a 2mm pitch."
I know its wrong. What I meant to type is a circumference of 50mm.
Experemental is not an option. This is a one off unit
Can someone give me the formula for a frictionless setup. I have a formula based on the combination of an inclined plane replacing the thread and the cone but would welcome someone elses ideas.
My biggest worry is the losses due to friction...
I have tried inclined planes to resolve this.
The problem I have is that I am also using inclined planes to determine the pullexcerted on the cone by the screw thread. When I factor in friction (because the angle is so small) I am getting wildly different results for small changes in friction...
Can someone help me please.
I am trying to calculate the trasmittable torque (expanding force) from an expanding mandrel.
The design is essentially a 24 degree (12 a side)cone being pulled toward a fixed blate by a 2mm pitch M16 bolt.
The expanding mandrel has 8 jaws that slide up the cone...