How to creating a proper engineering drawing? 5

[JimboJones21]

Hi, I have a new job where I need to take CAD models and create manufacturing drawings for the parts.

Are there any books that teach how to make a manufacturing drawing? I have a copy of the ASME standards, but they don't teach how to make a "nice" manufacturing drawing.

I don't want to bother the senior engineers with my questions about what needs dimensioning and what needs GD&T...

Anyone know of any books or resources I can use to help me??

Thanks.

 

[DanStro]

If you are asking for books that give guidance on creating clear and complete 2D drawings for people that don't have (or little) experience here are two that I've seen over the years. Though it's been to many years for me to admit since I last looked at either.

Technical Drawing by Frederick E. Giesecke, Alva E. Mitchell, Henry C. Spencer, Ivan L. Hill, John Thomas Dygdon, James E. Novak, Shawna Lockhart

Engineering Drawing And Design by Cecil Jensen, Jay Helsel, Dennis Short

HTH,
Dan

Han primo incensus

 

[KENAT]

I'll assume you're working in the US to ASME standards.

First off, look at the relevant standards.

Not just Y14.5. In fact I'd take a look at Y14.3 & Y14.24 before Y14.5 as they are more about drawing lay-out and how views are projected and what belongs on the drawings etc. Maybe even take a look at Y14.2 & some of the other 'lesser' standards as well as Y14.100 itself.

Read the first few chapters of Y14.5, not the tricky GD&T stuff initially but chapter 1 & 2 especially which give more general ground rules & definitions etc.. Section 1.4 'Fundamental Rules' is especially something you should know almost by heart.

Ask the seniors if you have any company specific standards to follow, or at least examples to follow. Try to find out who the real 'drafters' are as opposed to the engineers who half heartedly/grudgingly fudge it just enough to get by (most engineers will probably fall in this latter category from what I've seen) or the CAD monkies/jockeys that know what every button on the CAD does but can't create a decent drawing for the life of them.

If you are lucky enough to have a Checker, or at least a really senior drafter (or the rare engineer that really has a clue about drafting) who can spare the time to bleed (as in red pencil everywhere) all over your drawings then you are very fortunate - MAKE THE MOST OF IT.

forum1103 really is a good place than for this type of question as it covers most things drawing related - although there may be a few members there that tend to take things into the esoteric realm whenever possible

(And frankly, some of the suggestions above are laughable for "How to creating a proper engineering drawing" - many, perhaps even most, 'CAD Trainers' or standard CAD training courses from the CAD companies are more interested in 'what the software can do' than 'how you should use the software to create a good drawing'.

As for the self generated drawings, it's a case of serious GIGO - if you're lucky - the automatically created drawings usually need serious tweaking unless you were really careful when creating the models. Even then they usually mess up at least a few things.)

Posting guidelines faq731-376

http://eng-tips.com/market.cfm?

(probably not aimed specifically at you)
What is Engineering anyway: faq1088-1484​

 

[mowlin]

Exisiting and old drawings is a good place to get an idea of what the companny wants in a drawing and you can build from there..Cde and other texts can follow...And yes i am agreeing with the others...bother the Seniors..Thats what they are getting the big bucks for..!!!

 

[rockhill1]

Late to reply but I am curious. Are the drawings going to be used to manufacture the parts or just something to look at or put in a file cabinate? Depending on the complexity of the parts, the models can probably be used for programming in which accurate drawings may not be required. I know that may seem like a dumb question but if you are going to try and create manufacturing drawings for functional use, with absolutly no experience, you may not last long in that position. I have been a checker for many years in the automation industry and will go out on a thick limb here and say it cannot be done. Man dude, what did you put on your resume to get that position? Good luck!.....Wait a minute...I just noticed the "Electrical" part of your post. Sorry about that. No problem then, just throw some dimensions on those panel boxes and call out the hole sizes. Locate everything from 2 common edges in each view, call out the hole sizes and quantity and the toolmaker will figute it out with no problem.

 

[btrueblood]

"dimension shot guns" - star to Mint for that one.