Question about dates on title block 1

[BluTurtle]

Whats your practice in writing dates on the Engineering drawings.

I design & create drawings.

In general, I work on a design for 3 months & then create drawings.

What should the Drawn Date & Design Date recorded on the title block of the drawing.



~ BT

 

[ctopher]

I have never used "design date". That date could be a couple years before (3 months in your case) the drawing is created.

The "drawn date" should be the date when you add your name as "drawn by" and given out for fab, with a revision.

Chris
SolidWorks 09 SP4.1
ctopher's home
SolidWorks Legion

 

[ewh]

I was taught in my first drafting position that the drawn by and date blocks were to be filled out at the initiation of the drawing, not at the completion. I do not know if or which standard this practice was based on, but it is a habit I still have.

"Good to know you got shoes to wear when you find the floor." - [small]Robert Hunter[/small]

 

[KENAT]

I'm not sure Y14.100 explicitly says where it talks about dates in the title block, or is it rev dates, which ever.

I think our policy is the drawn date is the date when the drawer considers it finished, before any checking or minor changes from proto manufacture etc.

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[drawoh]

BluTurtle,

I fill in the date at the moment I start my drawing. With 3D CAD like SolidWorks, filling in all the profile cards, immediately, is good practise.

JHG

 

[btrueblood]

Like ewh and drawoh, I use the date of initiating the drawing.

This has an added benefit of making the design seem more "mature" before letting it out into the world to get beaten and bled on by machinists...

 

[MadMango]

We use Design Date and Drawn Date as well. I usually complete the Design Date the day I start a model, and the Drawn Date will be the date my drawing is finished and leaves my grubby hands for the outside world (anyone not me seeing it).

"Art without engineering is dreaming; Engineering without art is calculating."

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[SteveMartin]

My company has a design & drawn name/date on the title block. Nobody at my location (there are 3 others) uses the design blocks at all. By internal and informal convention our drawn date is the date the drawing is turned over for checking.

 

[looslib]

One company I worked at set the date in the titleblock automatically as the last date the CAD file was saved into the PDM system. No manual action needed.
For revisions to the drawing, we left the date in the titleblock alone as that was a variable we named 'initial_release_date'. We used a 'modified_date' for the revision fields.
Signoffs where also entered by the PDM software from the workflow and new images generated when the signoffs were completed.


"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli

 

[fcsuper]

In my opinion (take it for whatever that's worth to you), the date is mostly just to provide some sort of general reference in time. We don't have a hard and fast rule at my company either. It's usually just when the creator fills in the title block with its information. Whether that's at the end or the beginning of the creation process doesn't seem to matter.

Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion

http://groups.yahoo.com/group/solidworks & http://twitter.com/fcsuper

 

[MechEng2005]

I go with the "fill in all blanks in template first" method, so my drawn date is the date I start the drawing.

However, we are still working in 2D, so we don't have separate models. We are "in process" of getting 3D software, in which case I would be tempted to use the "design date" for date the model was first created, and the "drawn date" as the date the drawing was started. However, we will likely use the same title block that does not have "design date" on it, so it wouldn't really apply for me anyways.

We also have a spot in the title block for checked by and date though. So it wouldn't make a lot of sense to have the date the drawing was handed over to checking in the "drawn date" if the checker was just going to put the date he receives it in in the checked date box anyways.

-- MechEng2005

 

[KENAT]

I've always seen the 'checked' or 'approved' date as the date final approval is given by that person, with all their red lines incorporated. Having as the date it is given to them doesn't make any sense to me.

Posting guidelines faq731-376

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(probably not aimed specifically at you)
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[fcsuper]

A "given" date is necessary for effectivity, but that is not "drawn by" date.

Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion

http://groups.yahoo.com/group/solidworks & http://twitter.com/fcsuper

 

[thgirw]

An action raised during an audit for AS9100 was about this issue, specialist requested to see the date on the drawing and what we had was the date when the drawing is uploaded to the system. However he was not satisfied with it, because instead of initiation of the drawing "release" date is essential. Let me explain my point of view: imagine a situation where you are manufacturing some parts according to a drawing which is not released yet, in this case there will be a non-conformance on parts due to this reason. Later on when the drawing is finalized / released (if no changes on the drawing) imagine that you continue with manufacturing. Now move 10 years later and try to differentiate between those parts. Note that when traceability is the concern, all the dates should be included, but if there is only one date to be recorded, that should be the release date of the drawing

Cheers

 

[fcsuper]

thgirw,

Your auditor may not know how to read drawings. In this, they may not have been qualified to make such a finding. It's a bit like a doctor in medicine looking at a painting by a famous artist and complaining that he cannot read every letter in the artist's signature.

Regardless, I understand where you are coming from. In the medical device field, a common solution is that the drawing is edited once it is released to include a watermark or header that declares effectivity. That word Effectivity is the key. It doesn't matter what other dates are on the drawing (drawn date, rev date, approval dates). Effectivity is the day that the change went into effect. This can be edited on the neutral format such as PDF or directly on the CAD drawing itself. It does not (and should not) be associated with other dates on the drawing. This is just what I can offer you and the OP from my experience.

Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion

http://groups.yahoo.com/group/solidworks & http://twitter.com/fcsuper

 

[KENAT]

When I worked in Defense/Aerospace, the effectivity date (date it cut into production) of a certain rev of a drawing was beyond the scope of the 'drawing pack' as such. If a production batch had already started at say 'rev A' then they wouldn't switch to 'rev B' until the next batch. Given the gaps between batches this could mean months between a drawing being prepared and released, and hardware being made to it.

I've been on the receiving end of Auditors that didn't know anything about what they were auditing picking out exceptions based on irrelevant misunderstandings. It's one of the reasons I have a low opinion of the typical ISO quality implementation.

If the parts aren't fully interchangeable there should probably have been a change in part number per ASME Y14.100 - it isn't a rev date issue. Though I agree that for fairly obvious reasons this sometimes gets played fast and loose with during development.

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[drawoh]

thgirw,

Your PDM system should log release dates.

If your drawings are dated on the day the designer initiated them, then all the fabrication dates will be later.

On our drawings, we have boxes for Checked and Approved. I would think that the Approved date would be your release date.

As the designer, I issue preliminary drawings. Typically, these are labeled "PRELIMINARY" and dated. I am telling everyone "Here is what I intend to do. What do you think?". My co-workers, and sometimes customers, get to think about it and comment, before the actual hardware is built.

JHG