Calculate Tube Uncoiler Reel Acceleration | P-J

Click For Summary
SUMMARY

The discussion focuses on calculating the acceleration of a tube uncoiler reel (a3) during an intermittent uncoiling process. The user, P-J, clarifies that the uncoiler does not operate in a steady state, as it accelerates due to force F1 while the pneumatic brake is disengaged. The conversation highlights the relationship between the reel's acceleration (a3), the dancer roll's acceleration (a2), and the overall acceleration (a1), leading to the equation a1 = a3 + a2. The importance of understanding the forces at play, including reel inertia and friction, is emphasized.

PREREQUISITES
  • Understanding of basic physics principles, particularly acceleration and forces.
  • Familiarity with mechanical systems, specifically tube uncoilers.
  • Knowledge of pneumatic braking systems and their operation.
  • Experience with kinematic equations and their applications in mechanical engineering.
NEXT STEPS
  • Research the dynamics of tube uncoilers and their operational principles.
  • Study the effects of inertia and friction in mechanical systems.
  • Learn about pneumatic brake systems and their impact on acceleration.
  • Explore kinematic equations and their applications in real-world mechanical scenarios.
USEFUL FOR

Mechanical engineers, industrial equipment designers, and anyone involved in the design and operation of tube uncoiling systems will benefit from this discussion.

Pieter-Jan De Loore
Messages
5
Reaction score
0
Hello,
I'm making a tube uncoiler and I'm trying to find the acceleration of the tube at the reel (a3) can someone help me with this.

acceleration.PNG

kind regards,
P-J
 
Engineering news on Phys.org
Not immediately obvious why there would be any acceleration with the uncoiler running steady state .

You'll have to explain a bit more about how this uncoiler works so that we can understand more clearly what your problem is .
 
Nidum said:
Not immediately obvious why there would be any acceleration with the uncoiler running steady state .

You'll have to explain a bit more about how this uncoiler works so that we can understand more clearly what your problem is .
Hello Nidum,

Thank you for your response. Sorry for the bad explenation.

This uncoiler is not a steady state process. The uncoiler stands still and gets accelerated for a certain time because of F1 pulling the tube.
During this period, the dancerrol will move with acc. a2.
I'm trying to figure out what the acceleration of the reel is during the acceleration of the uncoiling process.
I hope this helps?
 
OK . It is an intermittent process . I've seen similar equipment in use .

There must be something that stops the reel from just spinning freely . Is this the reel inertia and natural friction or is there some positive retarding mechanism such as a friction brake or a brake motor ?
 
Nidum said:
OK . It is an intermittent process . I've seen similar equipment in use .

There must be something that stops the reel from just spinning freely . Is this the reel inertia and natural friction or is there some positive retarding mechanism such as a friction brake or a brake motor ?
yes I use a pneumatic brake, but during the acceleration time I don't use the brake. The force F1 is to accelerate the the inertia (reel+(dancerrol)?). You can assume there is no friction.
 
Is it correct to say that a1=a3+a2?
 
upload_2017-2-12_20-6-20.png

https://scontent-bru2-1.xx.fbcdn.net/v/t34.0-12/16730050_1445025058841271_1442485757_n.png?oh=2099815ac924837c5a74a25648495c00&oe=58A26271
 

Similar threads

Vacuum pump design
  • · Replies 6 ·
Replies
6
Views
3K
Help Walk Me Thru Motor Sizing Calculations Please
  • · Replies 14 ·
Replies
14
Views
3K
How to design hydraulic system and size cooler
  • · Replies 6 ·
Replies
6
Views
3K
Q factor of [exercise] battle ropes vs. elastic tubing?
  • · Replies 2 ·
Replies
2
Views
2K
Big Robot- Lattice boom crane - calculating maximum stress
  • · Replies 2 ·
Replies
2
Views
2K
Stronger or Stiffer? Tube vs Rod: Answers Here!
  • · Replies 2 ·
Replies
2
Views
2K
Automotive Need help calculating load torque and acceleration torque of a vehicle
  • · Replies 8 ·
Replies
8
Views
7K
Ts = temperature of steamModel Boiler: Negative Rate of Change of Enthalpy
  • · Replies 17 ·
Replies
17
Views
2K
Corrugated tube (bellow) under axial load
  • · Replies 2 ·
Replies
2
Views
2K
How to calculate how much an aluminium tube can hold?
  • · Replies 7 ·
Replies
7
Views
12K