Author: "Joseph F. Giallo, II" <jgiallo@...> Time: Sat Oct 5, 2002 7:33 am PDT Link
Sorry to trouble the group with a mundane (and hopefully simple) issue but I
couldn't find anything on the following in the archive:
How do you avoid creating a faint "ring" around a dimple? I get this effect
with the hand squeezer vice grips, c frame tool, and the pneumatic squeezer
as well. There is a faint outline on the dimpled material (0.032 thick)
around the perimeter of the male die, both with 3/32 & 1/8. If I reduce
pressure or don't strike as hard with the c frame I can avoid the outline
but don't seem to get a good dimple. Is this ring just a characteristic of
the dimpling process or is there some way to avoid it?
Regards,
Joe
RV7A emp.
Author: "Randy Crothers" <rnvcrothers@...> Time: Sat Oct 5, 2002 9:23 am PDT Link
Joseph,
When I ask the folks at Avery some questions about dimpling they said the faint marking around the dimple is a symptom of doing it right. Further they said if you don't see it, hit again.
----- Original Message -----
From: Joseph F. Giallo, II
To: RV7and7A@yahoogroups.com
Sent: Saturday, October 05, 2002 6:17 AM
Subject: [RV7Yahoo] dimpling question
Sorry to trouble the group with a mundane (and hopefully simple) issue but I
couldn't find anything on the following in the archive:
How do you avoid creating a faint "ring" around a dimple? I get this effect
with the hand squeezer vice grips, c frame tool, and the pneumatic squeezer
as well. There is a faint outline on the dimpled material (0.032 thick)
around the perimeter of the male die, both with 3/32 & 1/8. If I reduce
pressure or don't strike as hard with the c frame I can avoid the outline
but don't seem to get a good dimple. Is this ring just a characteristic of
the dimpling process or is there some way to avoid it?
Regards,
Joe
RV7A emp.
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[Non-text portions of this message have been removed]
Author: "Ross Hauck" <ross@...> Time: Sat Oct 5, 2002 11:10 am PDT Link
I've made a bit of a study of this, and my opinion is that the ring
shows that you have made a proper dimple and that the skin surrounding
the dimple is not deformed. Most of the less-than-wonderful skins I've
seen didn't have fully formed dimples. At the airshows and fly-ins that
I have attended, the best looking skins had the rings, and I asked an
experienced builder about it. His plane was partially painted, and he
showed me that the rings were not visible after painting. That said,
since everyone has a different technique, I would suggest testing a
sample piece with some dimples with rivets installed, and then finishing
with whatever you have chosen for your plane. Obviously, if you are
going to polish the surfaces instead of painting, your needs will
differ. Hope this helps. BTW, I use a medium ball pein hammer with my
C-frame dimpler, and really whack it. There has been some discussion
about hitting "hard with hard," however the top of the dimpler shaft
mushrooms nicely (I've dressed it back with a belt grinder twice),
indicating that it is not hard enough to cause splinters. I still
diligently use safety glasses!
Ross/RV-7A finish
Blue Mtn EFIS/Eggenfellner SuperSubaru
N2SU
-----Original Message-----
From: jgiallo@m... [mailto:jgiallo@m...]
Sent: Saturday, October 05, 2002 7:18 AM
To: RV7and7A@yahoogroups.com
Subject: [RV7Yahoo] dimpling question
Sorry to trouble the group with a mundane (and hopefully simple) issue
but I
couldn't find anything on the following in the archive:
How do you avoid creating a faint "ring" around a dimple? I get this
effect
with the hand squeezer vice grips, c frame tool, and the pneumatic
squeezer
as well. There is a faint outline on the dimpled material (0.032 thick)
around the perimeter of the male die, both with 3/32 & 1/8. If I reduce
pressure or don't strike as hard with the c frame I can avoid the
outline
but don't seem to get a good dimple. Is this ring just a characteristic
of
the dimpling process or is there some way to avoid it?
Regards,
Joe
RV7A emp.
[Non-text portions of this message have been removed]
Author: "kenrv6" <kenrv6@...> Time: Mon Oct 7, 2002 7:53 am PDT Link
you can't avoid it, and it doesn't matter. Dimple on.
--- In RV7and7A@y..., "Joseph F. Giallo, II" <jgiallo@m...> wrote:
> Sorry to trouble the group with a mundane (and hopefully simple)
issue but I
> couldn't find anything on the following in the archive:
>
> How do you avoid creating a faint "ring" around a dimple? I get
this effect
> with the hand squeezer vice grips, c frame tool, and the pneumatic
squeezer
> as well. There is a faint outline on the dimpled material (0.032
thick)
> around the perimeter of the male die, both with 3/32 & 1/8. If I
reduce
> pressure or don't strike as hard with the c frame I can avoid the
outline
> but don't seem to get a good dimple. Is this ring just a
characteristic of
> the dimpling process or is there some way to avoid it?
>
> Regards,
>
> Joe
> RV7A emp.