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Tension in steel cable stranding

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6 years 9 months ago #1158 by Archived Forum Admin
I recommend urgently to beginners or people who starts in strand manufacturing (stranding, cabling, bunching, twisting, spinning -> aluminium, copper, steel, technical textiles, cotton, hemp, etc ...) and don´t want to buy consulting services to read the following paper

www.wirenet.org/technical/abstract/Abs_Detail.cfm?ID=5155

Best regards

Juan Carlos González Villar

Kabel.Consult.Ing
This email address is being protected from spambots. You need JavaScript enabled to view it.
www.kabelconsulting.de

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6 years 9 months ago #1147 by Archived Forum Admin
you can find that information in the machinery's hand book. just look in the index for wire or springs. i just came across it last week looking up round wire spring information

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6 years 9 months ago #1148 by Archived Forum Admin
Hi Jordibg,

Your question is a little too generic. Wire tensions for a stranding operation depend on a number of different factors such as the type of machine you run the strand on, the actual execution of the machine, production speed (RPM), strand construction etc.

The overriding factor for all this is, however, that you do not want to stretch (beyond a controllable limit) the wire during the stranding.

Your equipment manufacturer should also be able to give you guidelines for wire tensions suitable for their machine.

Best Regards,


Willy Hauer
Howar Equipment Inc.

www.Howarequipment.com

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6 years 9 months ago #1149 by Archived Forum Admin
First, the machines that I'm talking about is 40 or 50 years old. Thus there is no handbook (missing).

Second, now I study the stranding process a little bit and if you ask about the tension of steel wire to a machines constructor or to a factory's worker I think that you will get a great surprise.

Like a constructor someone states one tension (of course, you must believe) but in the factory, the workers (with a experience for more to 20 years) make a manual tension of the band brake (= unknown tension).
Of course if you have a modern machine (load cells, pneumatic control system, etc.), things change.

I think my question asks something that nobody has. A general table for a range of cable sizes but again, the tension in cable process is usually adjusted manually without instruments.

Sorry for the extensive reply. I agree your answers Donrose00 and Howar.

Best regards

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6 years 9 months ago #1150 by Archived Forum Admin
It would be prudent to ask in one or two machinery manufacturers in your area (not necessarily the original machine manufacturer who likely is already defunct)to assist you. Given that you have a 40 or 50 year old machine, they would also be most happy to try to sell you a new machine. Anyway, Caballe in Barcelona would probably be one good source of additional insight into the proper settings for your current machine. Do not be shy about possibly paying them for their services/time.

Also, even with manual tensioning devices, it is possible to document/replicate settings from previous successful runs. Obviously, consistent maintenance is key to ensuring the accuracy of this aspect.


Erik Macs
VP North American Machinery Sales
Fine International Corporation
148 Oak Street
Natick, MA 01760 USA
508-315-8200 fax: 615-658-1988
This email address is being protected from spambots. You need JavaScript enabled to view it.

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6 years 9 months ago #1151 by Archived Forum Admin
Thanks for your answer, but Caballe isn´t a specialist in steel cable.

I would like to know someone with enough process experience and knowledge who has a handbook with the tension for process stranding differences vs cable diameters.

In Spain, there was a Tycsa engineer that was like that, because Tycsa (not actually Tycsa) made several different stranded steel cables. This person had a notebook with all his process information and data in it.

Thanks a lot.
Best regards.

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