I made a separate block for tighter tolerances
Tolerance your angle dimension and it overrides the sheet tolerance.
I have my tolerances set to certain numbers and if I need to change it I just right click and edit sheet to make it what I want.
I did a custom property tab builder file that allows me to select the tolerencing scheme on the drawing sheet just by selecting the button. It also allows me to add or change the tolerances from drop downs. I see no reason that 'bends tol' should be displayed on a sheet for a machined part. I have a button for INCHES or METRIC and it changes the drawing sheet to reflect that in the note "DIMENSIONS ARE IN ".
I have a different title block for sheet metal parts - mainly for the looser tolerances, but I also like to callout material & thickness in the title block so that they can get everything at a glance. (There are a few other things that are sheet metal specific, but this is the big one.)
I polled some shops in CA a long while ago while I worked in industry and came up with this chart for sheet metal:
Engineering and Design (forgive the slowness at which my website loads, I'm looking into why)
For Molded components, you'll likely want to look at ASME Y14.8, as methods to dimensions molded components do not follow title block conventions.
We are primarily a machined parts house but we do create a few sheetmetal components. Our tolerances are too tight for sheetmetal at .xx = plus/minus .01 and .xxx = plus/minus .005. Our sheetmetal vendor has submitted Deviations/Exceptions to our prints as follows:
- Tolerance from single forms to features: ±.010 [±.25mm]
- Tolerance from feature to feature on same surface: ±.005 [±.13mm]
- Tolerance on O.D.s thru multiple forms: ±.020 [±.5mm]
We have fairly vanilla borders:
and I do not want to make a huge project out of creation of sheetmetal templates. Thinking of just using the above 3 points as notes and moving on, but...
I do not think the creator of the templates at my current employer have put any real thought into the format. When I showed up, templates did not pull from the model so I have updated at least to that stage. I have been here long enough that "my new fangled ideas" might gain some traction if I propose changes to how our templates work. I don't know though. There is a lot of resistance to something looking different.
John Frahm wrote:
and I do not want to make a huge project out of creation of sheetmetal templates.
Templates are simple to modify, just right click the sheet and "Edit Sheet Format" - change the numbers, right click the sheet and select "Edit Sheet", then do a save as .drwdot file
I also do a Save Sheet Format at the same time (this step isn't needed and most guy's will think it's a little weird), but I have the Drawing Templates and the Drawing Formats the same. One of the reasons I did this was the fact that I have a lot of different templates and there were times I didn't update the Sheet Formats and made a mess of things. So now I make it easy, I change a template, there is a matching format... (except some of the Test Templates)
These are all good suggestions, but I cannot say what the best answer is. However, in talking to a sheet metal fabricator they indicated some of their customers do as follows in the drawing title block:
Sheet metal angles +/- 1 deg
Machined angles +/- 1/2 deg
I will probably use this approach as I would prefer not to have different formats except for specifying inches or millimeters & the drawing size (A,B,C &D).