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Peter J Stewart-Hay

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Peter J Stewart-Hay

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About Me

Personal Information

Gender
Male
About me
A university trained Professional Mechanical Engineer, registered in the Province of Ontario, Canada.

A wire and cable manufacturing engineering specialist with over 35 years hands on experience.

Company Information

Company
Stewart-Hay Associates
Address
Unit 51, 1814 Shore Road
London, Ontario Canada
N6K 0C6
City / Town
London
State
Ontario
Country
Canada
Land phone
519 6413212
Website
http://www.Stewart-Hay.com

Background

College / University
U of M
Graduation Year
1968
Degree/Certifications
B Sc. M.E.
Skills and Expertise
A university trained Professional Mechanical Engineer, registered in the Province of Ontario, Canada.

A wire and cable manufacturing engineering specialist with over 35 years hands on experience.

Recent activities

  • Mr Mohsen Ajalloueian thanks user 'Peter J Stewart-Hay' in the forum message ' Springback'.
    kunena.thankyou 17 hours ago
  • Peter J Stewart-Hay replied to the topic 'Springback' in the forum.
    Hello Mr Mohsen Ajalloueian;

    I have contacted a magnet wire specialist for you and hopefully, he will post an up to date answer for you. In the meantime, here are two threads and one paper to read:

    www.wirenet.org/wai-forums/5-electrical/...enameled-copper-wire
    www.wirenet.org/wai-forums/8-nonferrous/1610-grain-size#1615
    www.copper.org/publications/newsletters/.../wiremetallurgy.html
    Read More...
    kunena.post 2 days ago
  • Peter J Stewart-Hay replied to the topic 'Drawing a tinned copper wire' in the forum.
    Hello Mr ikiz

    When we were re-drawing electro-tinned copper wire, we were using a Syncro C-13 drawing machine with ceramic rings and a Syncro C-3 electric AC annealer. As I recall, the last three dies were new natural diamond and the balance of the dies were high new polish carbide. All dies had the standard angles for copper wire. The drawing lubricant was Lusol WD-1 synthetic and had a slightly higher than normal concentration as that recommended forthe intermediate drawing of copper wire.

    That was long ago, before nano diamond dies and polycrystalline diamond dies (Which of course would have been a disaster.) If you have some other experience with re-drawing tinned copper wire, I am sure that we would all be appreciate of your understanding , of dies and experience..

    Please provide us with your complete information.

    Thank you.
    Read More...
    kunena.post 6 days ago
  • Peter J Stewart-Hay replied to the topic 'Drawing a tinned copper wire' in the forum.
    Hello Mr. Do Van Bac,

    As you are already aware, the hot dip tinning of drawn-to-size annealed copper wire, results in a surface of the tin that is rough even though the wire passed through a wiping die.

    On the other hand when electroplating with tin on any copper wire, the tin surface is very smooth and of constant thickness as long as the wire was properly cleaned beforehand .and that the electroplating settings remained constant

    One of the major problems with electroplating however is strict environmental control so that no contaminants get into your sewer system. Closed cascading forward rinsing systems are therefore typically used.

    One problem with the drawing of tinned copper wire is the contamination drawing lubricant and annealing cooling water so that the drawing machine in question is not on some large drawing lubricant system and annealer cooling reservoir system.

    1. "After tin-plating via electroplating, does the tinned copper wire need any processes for its surface?" No as long as you have not damaged the surface in the annealer.

    2. "In the next drawing process, what will we have to pay attention to make sure the tin layer is guaranteed after drawing?" You have to inspect the final tin thickness on a statistical basis to ensure the proper thickness of tin is there. This is generally done with a good measuring microscope.
    Read More...
    kunena.post 12 days ago
  • kunena.thankyou 64 days ago
  • The conductor screen is made from XLPE and is semi-conducting in nature by the addition of carbon.. The compound can be super-smooth by having the carbon produced by burning acetylene as this gives a very small sized particulate.

    The conductor screen has two basic functions.

    (1) ]To mechanically protect the insulation from the conductor.. This prevents stress concentrations at the conductor surface of the insulation.

    (2) Because polyethylene has a larger thermal coefficient of expansion than the conductors, it will expand away from the conductor. Because the conductor screen is at the same potential as the conductor, there cannot be a flashover.

    The conductor screen and the insulation screen are simultaneously extruded with the insulation.
    Read More...
    kunena.post 66 days ago