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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

  • Hello Mike,

    If you click on the "WAI Store" heading at the left and go to Item you will see this booklet:

    "We Do it Straight - Wire Straightening"

    This book, published by WITELS Apparate-Maschinen Albert GmbH & Co. KG, is a compilation of findings regarding wire straightening systems—and the results achieved with such systems over the years.

    $ 20.00 - We Do it Straight (Member Price)
    $ 25.00 - We Do it Straight (List Price)

    Unfortunately this item is on back order right now.
    Read More...
    kunena.post 22 hours ago
  • Peter J Stewart-Hay replied to the topic 'Platinum alloy wire' in the forum.
    Dear Dr Popela,

    Since you are dealing with a very hard alloy of platinum , which suggests that the platinum has been alloyed with gold or silver, there is certainly the opportunity for segregation in the casting, sometimes called coring, if not properly done. This is due to the large difference in the melting points of these alloys.

    The picture of your wire break does not seem to exhibit the typical cup-cone failure associated with a ductile alloy. Instead it appears that there is evidence of segregation because of the cracking and the different degree of elongation at different points in the wire.

    I would therefore conclude that the alloy is non-uniform and therefore was cast improperly.

    This approximates my total understanding of platinum and platinum alloy wire drawing technology so I cannot help you more. Perhaps others will but it may take a long time, if ever, to obtain an appropriate response. You therefore may wish to investigate this with the metallurgy department or metallurgical engineering department at a good and nearby university..
    Read More...
    kunena.post 27 days ago
  • Peter J Stewart-Hay replied to the topic 'Spark leaks at Xlink cable' in the forum.
    Hello Mr. Martin Gerardp Escobar Angel,

    Your issues are the insulation faults at the primary insulation line or between the primary insulation process and the multi-passes under the electron beam head. Moreover, I would be quite surprised if the wire storage temperature of 40C (104F) was creating faults although I am unaware of the polyolefin you are actually using.

    The increase in faults during irradiation is normal and due to the insulation failures and the energy imparted by the electron beam head.

    I always have concerns about a spinning spooling take up at 900 meters/ minute (About 2950 F.P.M.) and flying off at 850 meters per minute (About 2800 F.P.M.). I would look very carefully at the equipment at the take up with focus on the guides and pulleys where damage could occur. Likewise the same careful inspection must occur at the cone packs including the tension control device which prevents kinking and the inside surface of the cones.

    If the extrusion faults are proven to occur at the insulation line, you must review your extrusion practices including extrusion temperatures, the time between shut down and clean out, plus the effectiveness of the clean out. Likewise you should know when and where these faults occur. Perhaps it is near the end of the run before the extrusion line clean out is due or just after the extrusion line had been poorly cleaned out. Finally, there had better no damage to the screw, cross head throat or tooling.
    Read More...
    kunena.post 32 days ago
  • kunena.thankyou 34 days ago
  • Peter J Stewart-Hay replied to the topic 'Magnet Wire Springback Part 2' in the forum.
    Dear Mr. Ajalloueian,

    From now on please do not add questions or other statements to old and archived threads. Instead, start up a new thread. Your action caused confusion and delay. Thank you.

    As far as your question goes, I did contact Mr. Burke but for some reason, he is unavailable. Thus you will just have to be patient.

    I also suggest you talk with a very qualified metallurgical engineer or metallurgist at your local university in order to generate some thought on this issue.
    Read More...
    kunena.post 36 days ago
  • Dear Mr. Ajalloueian,

    From now on please do not add questions or other statements to old and archived threads. Instead, start up a new thread. Your action caused confusion and delay. Thank you.

    As far as your lubricant question goes, you do not want any damage to the magnet wire so keep the temperature as low as possible. Moreover, talk it over with your enamel manufacturer.
    Read More...
    kunena.post 36 days ago
  • kunena.post 43 days ago
  • Peter J Stewart-Hay created a new topic ' Springback Part 2' in the forum.
    Dear Richard Burke

    Thank you so much for prior information. i increase the anneal temperature and get better result. but i still have this problem
    and hear that our wire is hard and difficult to insert in motor. i did a test on the wire size 0.800 mm grade -2 with 11 enamel passes and the result are: Rp0,2%: 130MPa - Rm (tensile Strength): 240MPa - Elongation: 39%
    what do you think about this result?
    Now i am going to change the dies of my RBD machine. i want to order dies with grain size 25 micron.
    may i know your opinion?
    Read More...
    kunena.post 43 days ago