[PSUBS-MAILIST] Welding

[Hugh Fulton via Personal_Submersibles]

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 think

the plug idea would be good. His only reservations were whether I could

get the plug out afterward. I said it would be designed to be able to be

pressed out.

The bearing seat is some distance from the welding & has a thick section

of 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 damaged

in 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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