Purpose of grid drawings
Purpose of grid drawings
(OP)
Unfortunately I was not able to make this question on thread Link, since it is closed.
I am curious why in automotive there are drawings with grid and without any dimensions on them?
I am curious why in automotive there are drawings with grid and without any dimensions on them?

RE: Purpose of grid drawings
These were then used to generate various servicing, shop and repair manuals, like this one
https://www.ebay.com/itm/363724149628
Quite what use your example is to anybody other than model makers, I'm not sure.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Purpose of grid drawings
"Know the rules well, so you can break them effectively."
-Dalai Lama XIV
edit: what Greg said...
RE: Purpose of grid drawings
https://www.researchgate.net/figure/Packaging-layo...
and here's one using grid
https://www.pinterest.com.au/pin/50468470198787000...
Incidentally when we talk about hardpoints we often still refer to coordinates referenced to these grids as 'grid', as opposed to whatever LFOR the component is drawn in.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Purpose of grid drawings
Here is example
Can this kind of the drawing be considered as production drawing? Or the purpose of this drawing is just to show relative position of the part and overal dimensions of the part which you can read from the grid?
Sorry for my ignorance but I never saw mention of this kind of the drawing in GD&T standards as ASME Y14.5 and ISO 1101.
RE: Purpose of grid drawings
It is a drawing that is used to create parts. It's not a part acceptance drawing - it's a drawing that would be used by tooling engineers and tool makers to create the dies to create the parts. Those would be used for prototype tooling which would then make prototype parts and then the corrections to fit all the parts properly would be identified and incorporated into the tooling and fixtures for production.
Next question, no doubt - how did the Great Pyramid get built before laser levels were available?
Oh the mysteries of the past!
RE: Purpose of grid drawings
Thanks 3DDave you are helpful as always. Don't mind me for stupid question, what info from this drawing can take tooling engineer since there are no any dimensions on it and tolerances, that can clarify to tooling engineer which features are important and thier precision during production of die?
RE: Purpose of grid drawings
RE: Purpose of grid drawings
RE: Purpose of grid drawings
That is why I am asking. I saw one drawing from one of our supplier that had those grids and I was confused since I saw it for first time, I was thinking that it was part of some kind of automotive standard.
If this kind of the drawing is oboslete or is not used anymore I won't bother myself to figure out why supplier send us drawing of one part with the grid.
RE: Purpose of grid drawings
RE: Purpose of grid drawings
RE: Purpose of grid drawings
If I am able to ask them I would ask, since I am not I am asking here.
In this case can I consider usage of grid when I want to show position of part on the car, and for the parts that can have different positions in assembly since you mention bumper which can have 25 different positions due to wheelbase?
RE: Purpose of grid drawings
RE: Purpose of grid drawings
I agree, but I don't care about my boss and will he ignore them or not. It is important to me to understand them, beacuse I want to know what is their purpose and when they are used.
RE: Purpose of grid drawings
I am beginning to think they sent it just to annoy you and it is working.
RE: Purpose of grid drawings
RE: Purpose of grid drawings
Why can't you tell me why you don't have time to explain how you cannot ask? I need to understand how you have this problem. It will help me and help other members of this forum to know why this is a problem for you.
RE: Purpose of grid drawings
Anyway I googled and manage to find maybe the defintion and purpose of those grid lines on the internet.
RE: Purpose of grid drawings
Had you looked at the link to the old tools, one of them is to scale dimensions from drawings like this. https://www.youtube.com/watch?v=zeCslpB-JVU specifically.
Also, and this is important, quotes from other websites should have the link to the website.
RE: Purpose of grid drawings