Finding the force acting on the helix of the thread

In summary, the conversation is about finding the force acting on the helix of a thread when applying torque with a torque wrench. The assumption is that there is no friction, but it is generally not a good idea for screw threads. It is recommended to consult textbooks on machine design or search for information on power screws.
  • #1
deepaknatraj
4
0
How do I find the force acting on the helix of a thread.

Say if I'm using a torque wrench to tighten a nut and compress a gasket between nut and a mating piece and give 100 ft.lbs of torque how much of it will be available on the helix of the thread (say a helix angle of 0.67 degrees). Assumption would be no friction.

Can someone help me with this calculation?

Thanks
 
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  • #2

1. What is the force acting on the helix of the thread?

The force acting on the helix of the thread is known as the tangential force. It is the force that is applied parallel to the surface of the helix and is responsible for the rotation of the thread. It is also known as the torque force.

2. How is the force acting on the helix of the thread calculated?

The force acting on the helix of the thread can be calculated using the formula F = μ * N, where F is the tangential force, μ is the coefficient of friction, and N is the normal force. The coefficient of friction is a measure of the resistance between two surfaces in contact, and the normal force is the force perpendicular to the surface of the helix.

3. What factors affect the force acting on the helix of the thread?

The force acting on the helix of the thread is affected by several factors, including the coefficient of friction, the normal force, the radius of the helix, and the angle of the helix. Additionally, the material and surface properties of the thread and the surface it is in contact with can also affect the force.

4. Can the force acting on the helix of the thread be increased?

Yes, the force acting on the helix of the thread can be increased by increasing the coefficient of friction or the normal force. This can be achieved by using materials with higher frictional properties or by increasing the weight or pressure on the thread.

5. How does the force acting on the helix of the thread affect the thread's movement?

The force acting on the helix of the thread is responsible for the rotational motion of the thread. The magnitude and direction of the force will determine the speed and direction of the thread's movement. If the force is greater, the thread will move faster, and if the force is applied in a different direction, the thread's movement will change accordingly.

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