[PSUBS-MAILIST] Welding

[Alan James via Personal_Submersibles]

Thanks Hugh,I am wavering; I had ideas of welding fins on to the centralsection to support the kort nozzle & the plug may come in handy for that, however with fins on I wouldn't be able to do post weld machining.Might do the first housing as a bolt together & experiment with a weldedversion later.Alan


      From: Hugh Fulton via Personal_Submersibles <personal_submersibles at psubs.org>
 To: 'Personal Submersibles General Discussion' <personal_submersibles at psubs.org> 
 Sent: Friday, April 29, 2016 12:54 PM
 Subject: Re: [PSUBS-MAILIST] Welding
   
#yiv3515954964 #yiv3515954964 -- _filtered #yiv3515954964 {font-family:Helvetica;panose-1:2 11 6 4 2 2 2 2 2 4;} _filtered #yiv3515954964 {font-family:Helvetica;panose-1:2 11 6 4 2 2 2 2 2 4;} _filtered #yiv3515954964 {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;} _filtered #yiv3515954964 {font-family:Tahoma;panose-1:2 11 6 4 3 5 4 4 2 4;}#yiv3515954964 #yiv3515954964 p.yiv3515954964MsoNormal, #yiv3515954964 li.yiv3515954964MsoNormal, #yiv3515954964 div.yiv3515954964MsoNormal {margin:0cm;margin-bottom:.0001pt;font-size:12.0pt;}#yiv3515954964 a:link, #yiv3515954964 span.yiv3515954964MsoHyperlink {color:blue;text-decoration:underline;}#yiv3515954964 a:visited, #yiv3515954964 span.yiv3515954964MsoHyperlinkFollowed {color:purple;text-decoration:underline;}#yiv3515954964 p.yiv3515954964MsoAcetate, #yiv3515954964 li.yiv3515954964MsoAcetate, #yiv3515954964 div.yiv3515954964MsoAcetate {margin:0cm;margin-bottom:.0001pt;font-size:8.0pt;}#yiv3515954964 span.yiv3515954964EmailStyle17 {color:#1F497D;}#yiv3515954964 span.yiv3515954964BalloonTextChar {}#yiv3515954964 .yiv3515954964MsoChpDefault {font-size:10.0pt;} _filtered #yiv3515954964 {margin:72.0pt 72.0pt 72.0pt 72.0pt;}#yiv3515954964 div.yiv3515954964WordSection1 {}#yiv3515954964 I have spent half my life designing things to avoid welding.If you insist on welding then normally you should not have it butted up but a small gap so the weld doesn’t crack after cooling and contraction.Still think you need to allow for cleaning up for concentricity afterwards.  You can check with a DTI.  I prefer bolt together.  Hugh    From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan James via Personal_Submersibles
Sent: Friday, 29 April 2016 11:48 a.m.
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] Welding  Hugh,went & talked with a welding specialist this morning who seemed to thinkthe plug idea would be good. His only reservations were whether I couldget the plug out afterward. I said it would be designed to be able to bepressed out.The bearing seat is some distance from the welding & has a thick sectionof aluminum between. See attachment (not dimensionally correct).The plug should stop the tube section from distorting, shouldn't it.I have 6 of these to make initially & it will be a lot less work if I can weld.I need to go with the steel plug as an aluminum plug could get damagedin the pressing process.Am I convincing you or does this still get the thumbs down?Cheers Alan  From: Hugh Fulton via Personal_Submersibles <personal_submersibles at psubs.org>
To: 'Personal Submersibles General Discussion' <personal_submersibles at psubs.org> 
Sent: Friday, April 29, 2016 8:55 AM
Subject: Re: [PSUBS-MAILIST] Welding
Alan,
Stay away from welding or completely re-machine as Hank says otherwise you
will havev concentricity issues with the bearings etc.
Besides Aluminium will be a better heat sink than a steel insert.  Hugh 


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