[SEL] Was: A Welding Question Now: Elliptical Rings

tamatea whanau brent.tamatea at clear.net.nz
Thu Aug 23 00:44:51 PDT 2007


Sorry i dont know Johns address maybe other members may be able to help
brent

-----Original Message-----
From: sel-bounces at lists.stationary-engine.com
[mailto:sel-bounces at lists.stationary-engine.com]On Behalf Of john palmer
Sent: Thursday, August 23, 2007 4:10 AM
To: sel at lists.stationary-engine.com
Subject: Re: [SEL] Was: A Welding Question Now: Elliptical Rings


Hello Brent,thanks for the info. Tell me ,do you have any contact with old
John Thorby.I owe him a letter from about a year ago!    John


>From: tamatea whanau <brent.tamatea at clear.net.nz>
>Reply-To: The SEL email discussion list <sel at lists.stationary-engine.com>
>To: The SEL email discussion list <sel at lists.stationary-engine.com>
>Subject: Re: [SEL] Was: A Welding Question Now: Elliptical Rings
>Date: Tue, 21 Aug 2007 18:58:00 +1200
>
>John i thought that was a good explanation on the rings i think that making
>piston rings was very much a secretive thing amongst those in the industry
>it is abit of an art.Interestingly you mentioned hammering rings in the
>1950s i have read it was common practise to hammer the inside area of old
>rings with a ball pein hammer gently of course to re tension them if they
>had lost there spring. brentnz
>
>-----Original Message-----
>From: sel-bounces at lists.stationary-engine.com
>[mailto:sel-bounces at lists.stationary-engine.com]On Behalf Of john palmer
>Sent: Monday, August 20, 2007 11:57 PM
>To: sel at lists.stationary-engine.com
>Subject: Re: [SEL] Was: A Welding Question Now: Elliptical Rings
>
>
>Rob,I don't profess to be a ring expert but here is a lay mans explanation!
>When you split or cut a ring it springs out and there is more pressure by
>the joint than opposite. What you need is pressure all around to seal.  The
>old way was to machine the center excentric to the out side so that
>opposite
>the gap would be say twice as thick,thereby giving more pressure. Another
>way was to preen or hammer the inside of the ring. The Campbell Gas Engine
>Co here in England was famous for their 'piston ring hammering machine'.
>They sold them to other engine makers. A friend of mine has good results by
>heating the newly machined rings on a mandrel. Perhaps Dave could fill in
>the gaps here?   John
>
>
> >From: Rob Skinner <rskinner at rustyiron.com>
> >Reply-To: The SEL email discussion list <sel at lists.stationary-engine.com>
> >To: The SEL email discussion list <sel at lists.stationary-engine.com>
> >Subject: [SEL] Was: A Welding Question  Now: Elliptical Rings
> >Date: Sat, 18 Aug 2007 10:16:40 -0700
> >
> >
> >On Aug 18, 2007, at 4:06 AM, john palmer wrote:
> >
> > > Hi Rob, for this job I would ark weld this with a good rod for
> > > cast. Vee out the crack and weld a little at a time and preen the
> > > weld with your chipping hammer as soon as you take the rod away.
> > > Just do a stitch at a time so that you dont get things too hot. You
> > > have to be patient walk away from it and do something else till it
> > > has cooled. Probably best to stitch from either end at a time.This
> > > has worked for me most times over the years.  John
> >
> >Heya John,
> >I've been meaning to ask you this since reading your article a couple
> >months ago.  You mentioned elliptical rings.  I've seen this on one
> >of our engines and chalked it up to a machinist who didn't set up his
> >work in the lathe properly.  What's the real story?
> >
> >Rob
> >
> >
> >
> >
> >_______________________________________________
> >SEL mailing list
> >SEL at lists.stationary-engine.com
> >http://www.stationary-engine.com/mailman/listinfo/sel
>
>
>_______________________________________________
>SEL mailing list
>SEL at lists.stationary-engine.com
>http://www.stationary-engine.com/mailman/listinfo/sel
>No virus found in this incoming message.
>Checked by AVG Free Edition.
>Version: 7.5.484 / Virus Database: 269.12.0/960 - Release Date: 8/18/2007
>3:48 PM
>
>No virus found in this outgoing message.
>Checked by AVG Free Edition.
>Version: 7.5.484 / Virus Database: 269.12.1/962 - Release Date: 8/20/2007
>1:08 PM
>
>_______________________________________________
>SEL mailing list
>SEL at lists.stationary-engine.com
>http://www.stationary-engine.com/mailman/listinfo/sel


_______________________________________________
SEL mailing list
SEL at lists.stationary-engine.com
http://www.stationary-engine.com/mailman/listinfo/sel
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.484 / Virus Database: 269.12.2/967 - Release Date: 8/22/2007
6:51 PM

No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.484 / Virus Database: 269.12.2/967 - Release Date: 8/22/2007
6:51 PM




More information about the sel mailing list