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Richard Burke

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About Me

Personal Information

Gender
Male
About me
40 years in the magnet wire industry with positions that include processing, product, equipment start up, design and construction and plant management. Corporate training, development for a college.

Company Information

City / Town
Hixson
State
TN
Country
United States

Background

College / University
Univ. TN- Chattanooga.: Univ. So. Dakota.
Graduation Year
1968 ; 2007
Degree/Certifications
BS Engineering Mgt.
MA Education Administration/Adult Education

Recent activities

  • Mr Mohsen Ajalloueian thanks user 'Richard Burke' in the forum message ' enamelling oven parameters'.
    kunena.thankyou 49 days ago
  • Mr Mohsen Ajalloueian thanks user 'Richard Burke' in the forum message ' Magnet Wire Springback Part 2'.
    kunena.thankyou 49 days ago
  • kunena.thankyou 55 days ago
  • This is a question that an enamel supplier should be able to readily answer. For the first 60-70 years of manufacturing magnet wire the tan-delta test and tester did not exist. GE manufactured probably millions of transformer with wining wire coated with Formvar. Do an internet search for formvar and suppliers. Firmvar refers to any of several thermoplastic resins that are polyvinyl formals. You might check for "Vinylec"
    Read More...
    kunena.post 55 days ago
  • First I would weigh each of my bobbins to determine their weight. Perhaps the dies on the second machine are wearing faster than on the first machine. Also if you take a meter of wire at the beginning of the spool and at the end of the spool and they are still 7.78 and 7.79 then I would suspect that you have more meters of wire on the second bobbin than your linear counter is indicating or less on #1. 1% error on either or both would account for the difference.
    Read More...
    kunena.post 55 days ago
  • Richard Burke replied to the topic 'Copper wire drawing air quality' in the forum.
    Mr. Senthil,
    How long after drawing the wire does it take for it to turn reddish or blackish? What is the temperature of the wire on the spool when it comes off the drawing machine. It sound like it oxidizing and your lubricant supplier should be able to help you.
    Read More...
    kunena.post 55 days ago
  • Richard Burke replied to the topic 'Magnet Wire Springback Part 2' in the forum.
    Sorry to take so long replying. I apologize for not being up on metric measurements theses days-I'll have to get me reference book out to refresh. Off hand I would say that the numbers look fairly good. What are the spring back values? Are you doing inline wiredrawing - enameling? If you are inline drawing and the supply wire has not been overdrawn and fully hard, inline drawing and subsequent enameling should result in a magnet/winding wren that has better tensile strength, better ductility, and a lower spring back. If this is not happening then a metallurgical mount sufficient to show grain structure might confirm that the grain structure is too small not well organized. If this is what you have then you need to use a softer supply wire into the inline drawing machine.
    Read More...
    kunena.post 55 days ago
  • Richard Burke replied to the topic 'Enameling dies' in the forum.
    I've seen a variety of "things" used for dies. Peter is correct about Bettner Die as for over 3 generations they have been the expert on wire enameling dies. What types of dies are you using? Split, solid, roller. Etc?
    I really don't think it matters very much about the incoming or outlet angles. This is not like wire drawing because you are nit reducing wire diameter rather you are increasing it by adding enamel. Split dies are ok for slower speeds and since they are formed out of metal strips that are not very thick, there is just a hole. When the wire passes through the die, it wipes the excess enamel off. If your speed gets to high a split die will tend to open because of the increased hydraulic pressure.
    Hydraulic pressure is the force built up in the die as the wire passes through it.
    With a solid die you want to only provide enough enamel to the wire to increase the wire diameter but at the same time you want enough that the hydraulic pressure will allow the die to freel float. This is more obvious on a vertical oven than a horizontal oven.
    Summary, not really important.
    Read More...
    kunena.post 55 days ago
  • Richard Burke replied to the topic 'enamelling oven parameters' in the forum.
    Good answer Peter.
    Read More...
    kunena.post 55 days ago
  • Richard Burke created a new topic ' Magnet Wire Enamel' in the forum.
    One of the best sources of information about the enamels you are using to make your magnet wire ( winding wires, transformer wire, et al) is your enamel supplier. They should be able to provide you with all manner of technical information and data.

    Richard
    Read More...
    kunena.post 575 days ago