Hi all
I take advantage of P.Thirard's question to start a debate on this symbol.
For me, it represents a symmetry of a part and not a parting line.
But, I do know that it is sometimes used as a representation of the parting line.
Does anyone have any information about standards or other information on the use of this symbol?
Symbol in question attached.
To your comments.
S.B
Hello
If I remember my drawing classes correctly, this symbol represents a parting line.
So maybe in other schools it's the same?! ^^
I may be too new to the business (10 years...) but I discovered this symbol on Lynkoa. At the same time, I never have a parting line on my parts! But for symmetry, never seen before.
Is this still relevant? It reminds me of the symbols with triangles to indicate the surface condition, replaced by the symbol of Ra.
Hello
We don't do a lot of molding here, but I found the symbol in the GDI, see the attached image and it's not the same!
Hello
In tolerances, symmetry has its own symbol:!
The GDI: the bible!!
It seems to me that this symbol is not standardized. There are indeed several representations for the parting line and the one that looks like a pair of scissors comes up very often in the plans I have been able to consult.
@David be3
I had also thought of this symbol but it implies tolerance. Whereas the one indicated is only information, right?
for me the symbol http://www.lynkoa.com/sites/default/files/questions/15/05/2014/symetrie.png
is a part axis symbol
and not a joint plane symbol
@+ ;-)
+1 for Lucas, I also have "The Industrial Designer's Guide", and I confirm =)
Hi all
I design plastic parts and personally I have never seen standardized joint plan symbols either from my customers or from my mold makers.
However, for obligatory passages, I use non-standard dotted lines (as well as my customers such as Valeo who are I think very standardized) in annotation.
For the symmetry symbol I use and have always seen used the sign of the 3 haorizontal bars (as in the GDI).
rom's
Hello @ all,
I confirm that these symbol is well used for parting lines
I have been working in a tool for 21 years (forge / end cap / SP and gravity foundry)
This symbol is used in SP foundry.
On the other hand, it is used less and less.
Thank you for your answers.
Personally, I have never seen this symbol in the course of drawing.
I searched through my old books (Mémotech and Chevalier) without finding it.
The rare subject on the internet the signal in symmetry.
In the link below (with the axis not placed in the right direction)
http://www.forum-cao.fr/viewtopic.php?f=5&t=1038&start=15
And below, a little weirdly done.
http://www.forumconstruire.com/construire/topic-183898.php
Even here, we've talked about it as symmetry.
http://www.lynkoa.com/forum/cao/symbole-symetrie-dans-mise-plan
@gt22, I share your opinion.
@frederic Humbert
I learned this symbol in symmetry while working in the special machine.
And then I've seen it on a very small level since I've been in the field of gravity casting and plastic injection, among other things.
I think this type of symbol is used less and less since 3D CAD. In the days of the paper plan or 2D, it saved time. (less very much to do).
Not to mention those to be erased with a razor blade. ;)
S.B
Hello @ all,
I also confirm that this symbol is indeed the one on the parting line.
Not to be confused with a plane of symmetry, because a parting plane is not necessarily and even very rarely located on a plane of symmetry.
This remark is valid in casting, cast iron, steel, etc.
Hello
I'm a carpenter by trade and for us it's an axis of symmetry
Kind regards
Franck
100/100 agree @ Franck51
16 May, 2014 - 06:58 | /!\ Report abuse
Hello
I'm a carpenter by trade and for us it's an axis of symmetry
Kind regards
Franck
@+ ;-)
I think the debate will remain eternal!
Hello
This symbol does indeed represent an axis, it is widely used on plans in the shipbuilding sector to represent the axis of the ship.
FGH.
Hello
I must say that now I am very bothered to choose the best answer.
S.B
Hello everyone,
I've been a Projteur cartoonist for 10 years
I confirm that this symbol is the symbol of a symmetrical plane
Hello
This symbol is not standardized, it is a convention that some designers have decided to adopt, unless someone can provide the standard