Are machining marks required in all views in a drawing?
Are machining marks required in all views in a drawing?
(OP)
Hello,
I have a part that is machined on a surface. That surface is shown in two views in the drawing, front and side. Is is necessary that I have a machining mark on both surfaces or is one sufficient? Is there a standard that specifies whether the machining mark needs to be in all views?
Thanks,
-renasis
I have a part that is machined on a surface. That surface is shown in two views in the drawing, front and side. Is is necessary that I have a machining mark on both surfaces or is one sufficient? Is there a standard that specifies whether the machining mark needs to be in all views?
Thanks,
-renasis





RE: Are machining marks required in all views in a drawing?
RE: Are machining marks required in all views in a drawing?
RE: Are machining marks required in all views in a drawing?
ANSI/ASME B46.1-1985, Surface Texture (Surface Roughness, Waviness, and Lay)
I do not have access to that standard at the moment, but I think a duplicate finish mark with a finish value would be subject to error when a change is made. As such I would avoid adding extra finish marks where possible. If neccessary for clarity, I think it would not be that much of a problem if you add extra finish marks as long as you confirm that the values are consistant.
Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services
www.infotechpr.net
RE: Are machining marks required in all views in a drawing?
Chris
SolidWorks 09, CATIA V5
ctopher's home
SolidWorks Legion
RE: Are machining marks required in all views in a drawing?
A specific surface finish symbol that denotes "machining required." (There's a picture of each symbol and what they mean in the SW help under "Surface Finish PropertyManager").
Joe
SW Office 2008 SP5.0
P4 3.0Ghz 3GB
ATI FireGL X1
RE: Are machining marks required in all views in a drawing?
Cyril Guichard
Defense Program Manager
Belgium
RE: Are machining marks required in all views in a drawing?
Thanks for the replies. I am going to play devil's advocate. I found a book that I refer to occasionally. It indicated that the finish mark is shown only on the edge view of a finished suface and is repeated in any other view in which the surface appears as a line, even if the line is a hidden line. Reference the excerpt here: http:/
I searched online and found another comment that supports this here: ht
So, are these books wrong? Does anyone have the ANSI/ASME B46.1-1985, Surface Texture (Surface Roughness, Waviness, and Lay) standard?
Thanks,
-renasis
RE: Are machining marks required in all views in a drawing?
RE: Are machining marks required in all views in a drawing?
Neither of those books are in any way to be considered standards, but only teaching tools. Look into the relevant standards to answer your question if you want to be sure of the correct answer.
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Are machining marks required in all views in a drawing?
KENAT,
Have you reminded yourself of FAQ731-376: Eng-Tips.com Forum Policies recently, or taken a look at posting policies: http://eng-tips.com/market.cfm?
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Are machining marks required in all views in a drawing?
I looked on Google books again and found a couple of books indicted that the surface symbol should only be placed once, in one view, preferably on the view that has a dimension to the feature. By placing the symbol twice, it would be as Kenat said, similar to a dual dimension(which would be redundant).
Thanks for all your replies.
RE: Are machining marks required in all views in a drawing?