Some problems and solutions about the carrier arrangement on the modern braiding machines
Prof. Dr. Yordan Kyosev
Niederrhein University of Applied Sciences Mönchengladbach, Germany, E-mail: [email protected]
2.3. 2015 | Prof. Dr. Yordan Kyosev 2 Outline
About the author
Introduction
Three practical cases: Case 1. Color arrangement Case 2. Machine configuration and Carrier arrangement Case 3. Partial arrangement
Overview of the future steps
2.3. 2015 | Prof. Dr. Yordan Kyosev 3 Carrier Arrangement ?
What is the problem with the carrier arrangement? Non-Disclousure Agreements For experts – no problem. …enough work for this live Problem is to find the expert.
For my students (about 20 „braiders“ per year)– no problem, € € € € ? … if they pass the exam. Problem is to keep these in the braiding companies
Carrier arrangement is a problem for • new employes • for most of us, if the braiding machines are new (1 Full 1 Empty does not work)? • People, who have to create new braided structures, but do not have the machine and do not know how (composites, medicine, ropes with special requirements…)
2.3. 2015 | Prof. Dr. Yordan Kyosev 4 Solutions
A. Understand the principles – learn it
needs some teachers or books
B. Use computer –
specialized software is required.
2.3. 2015 | Prof. Dr. Yordan Kyosev 5 New Book: Braiding technology for textiles
Author : Yordan Kyosev Link is placed at Release Date: 16 Oct 2014 www.kyosev.com -> books Imprint: Woodhead Publishing Print Book ISBN : 9780857091352 Pages: 416
2.3. 2015 | Prof. Dr. Yordan Kyosev 6 Braiding technology for textiles
2.3. 2015 | Prof. Dr. Yordan Kyosev 7 Braiding technology for textiles
2.3. 2015 | Prof. Dr. Yordan Kyosev 8 Case 1: Colour Arrangement Theory - one chapter
2.3. 2015 | Prof. Dr. Yordan Kyosev 9 Case 1: Colour arrangement Or - use software – with Texmind Braider you can create colour ropes in 3D in 60 seconds
2.3. 2015 | Prof. Dr. Yordan Kyosev 10 Case 2 : We need a new braiding machine
How it has to look like?
What can I do with this machine, except the „main“ product?
How to arrange the carriers?
Starting from year 2015 this is simple – you can simulate the machine behaviour.
2.3. 2015 | Prof. Dr. Yordan Kyosev 11 Theoretical Background
Simulate the carrier motion
On one Horn Gear: Xc = R * cos (a) Yc= R * sin (a)
Transfer to next Horn Gear
Check for Collission
Implementad in TexMind Braiding Machine Configurator
2.3. 2015 | Prof. Dr. Yordan Kyosev 12 Braiding Machine Configurator: Draw Machine in 55sec
2.3. 2015 | Prof. Dr. Yordan Kyosev 13 Carrier arrangement ?
2.3. 2015 | Prof. Dr. Yordan Kyosev 14 Case 3.
Company X (technical braids) has several 24-th tubular braiding machines, but not 12-th.
It seems, that the rope producers are too busy and too expensive now and some of their customers try to play the old game – would X be able to produce a 12- rope and what it costs…
What to do ?
At that stage - the former students call me and are starting so „I do not know if you remember me, but I was your student and… now I have a problem, similar like this on our examination…“
2.3. 2015 | Prof. Dr. Yordan Kyosev 15 What say the Theory?
What we have: 24 the tubular braider means you have (max.) 24 carriers
The machines have 4-slot horn gears, there are 24 carriers + 24 empty positions = 48 slots 48 slots / 4 slot per horn gear = 12 horn gears.
Current arrangeent is 1 Full 1 Empty
Floathing length is 2
With 1 yarn in a group
2.3. 2015 | Prof. Dr. Yordan Kyosev 16 Floating length and yarns in a group ?
Floating length = DE: Flechtigkeit
Yarns in a group = DE: Fädigkeit
2.3. 2015 | Prof. Dr. Yordan Kyosev 17 Main Braiding Equation 4
3 1
2 4 2 2 [ ]
2.3. 2015 | Prof. Dr. Yordan Kyosev 18 Why do we need this theory?
We have 24 carriers, in order to receive structure with 12 carriers, We have „simply“ to remove the half of these.
But which 12 ?
2.3. 2015 | Prof. Dr. Yordan Kyosev 19 Let we try
If we remove every second carrier ?
Then we will get 1 Full - 3 Empty arrangement, which means repeat of 4 And floathing length of 1, but we need 2 (regular barids) 4 1 4 X X X X X X
2.3. 2015 | Prof. Dr. Yordan Kyosev 20 Let we try
If we keep every two carriers and remove after that two? Then we have areas with 2 ridges with floating length of 2 Followed by areas with just floating yarns (floating lenght endless). Is this true? Or the result will be twisting, because the floating length is 0,5 4 If YOU know the theory about it, 0,5 = please let me know, 8 4 4 I did not found literature for such situations! 2 = ∞ = 2 0
X X X X X X
2.3. 2015 | Prof. Dr. Yordan Kyosev 21 Questions
Theory missing, unclear or not published.
What do to?
Develop the theory or Do Experiments
Practical experiments or numerical experiments.
If the machine is available – play with it.
If you do NOT have the machine – Simulate with the configurator.
2.3. 2015 | Prof. Dr. Yordan Kyosev 22 Original configuration
2.3. 2015 | Prof. Dr. Yordan Kyosev 23 Reduced configuration
2.3. 2015 | Prof. Dr. Yordan Kyosev 24 Reduced configuration
This yarn is not interlacing with any other yarns
2.3. 2015 | Prof. Dr. Yordan Kyosev 25 Half of the machine?
4 2 = 2
2.3. 2015 | Prof. Dr. Yordan Kyosev 26 Not so good visualisation but it should work
2.3. 2015 | Prof. Dr. Yordan Kyosev 27 Do, not do and to do
The configurator can Do: simulation of the carrier motion, check the arrangement and generates IDEALIZED 3D Braid. Design any maypole braiding machine (currently with fixed tracks)
What can NOT Do: simulation of the strength and the complete mechanical behaviour of the ropes.
2.3. 2015 | Prof. Dr. Yordan Kyosev 28 You can follow the development in the group „Industrial braiding“ in LinkedIn
2.3. 2015 | Prof. Dr. Yordan Kyosev 29
Thank you for your attention.
[email protected] in cooperation with [email protected] www.hs-niederrhein.de www.texmind.com
2.3. 2015 | Prof. Dr. Yordan Kyosev