【转帖】engineering drawings

yang686526

engineering drawings
i have searched the forum but no luck.
i am looking for examples of professional high quality engineering drawings.
please also critique the engineering drawing i have attached, i would like to improve it.
thanks
jd engineering
solidworks 2008
quad-core intel® xeon® 5300-series 64-bit
as mentioned in your solidworks post, i suggest going for formal training.
chris
solidworks/pdmworks 08 2.0
autocad 06/08
two most basic rules of thumb...
dimension according to how the feature is defined/designed.
dimension in a way that can be measured.
more...
generally, radius is for corners & fillets, Ø is for shafts, discs, holes.
3d pundits be d@mn3d, 2d drafting is not going away in our lifetime.
job shops don't give you want you want; they give you what you draw.  crap on paper = crap in inventory.
drafting is a humble chore that can make or break a product.
drafting is often the final and only expression of your design that most will see.  take pride in it!fff">
honesty may be the best policy, but insanity is a better defense.
agree with above comments.
drafting in itself is more of an art than a science. when you're creating a drawing, it's very important that you go feature by feature to make sure that all the necessary information is there. when you drill a hole, do you give the size of the hole as well as how to locate it with respect to reference points, etc, etc.
a class is good, but that will only give you the foundation. practice is what makes a great draftsman.
i especially agree with thetick. job shops will only give you what you ask for.fff"> so be very sure that that is what you want.
v
even more basic that the two basic rules given by tick is "a drawing must contain all of the information necessary to make the part."
your sample does not.
i would actually suggest seeking out a drafter on contract.  a lot of us can do this sort of work and it won't cost too much for something like this, and the cost it will save you from issues because of mistakes is incalculable.  re  
fcsuper
can you please send me a personal message with a quote?
jd engineering
solidworks 2008
quad-core intel® xeon® 5300-series 64-bit
i agree with others here that a drawing needs some serious work. a machine shop could not make this part from the dimensions given. when designing a part always keep in mind who is making the part. you may have designed the part and understand the part completely but that is only a small part of the picture. your drawing must give detailed information to someone who has little or no knowledge of the part. when i send drawings out to have made. i often give more information than is needed.
i would start with adding a circled center line from the center of the part to the center of the holes. then dimension this center line. you also need to show at what angle the holes are from each other. i would assume by looking at the drawing the holes are 51.4286 degrees apart but there is no proof of this on the drawing. also there is a counter bore in the part at the holes. there is no mention of this anywhere on your drawing. another thing i see that is lacking is the material that this part is to be made from. is it carbon steel, stainless steel, nylon, abs? i have no clue and so does the people who will make this part for you.
i'm not trying to drag you down with all this negative comments, but adding the needed information will prevent phone calls from whoever is making this part.
i design and draft parts on a regular basis and then send them out to a machine shop to have them make. i rarely ever get phone calls from them saying they don't have enough information to make the part.
hope this helps
thanks markruble, i will take heed.
jd engineering
solidworks 2008
quad-core intel® xeon® 5300-series 64-bit
finesse,
is this a school project?
chris
solidworks/pdmworks 08 2.0
autocad 06/08
ctopher
no this is not a school project. i am assisting a colleague of mine in the design of rotors and stators for a concept in brake design.
jd engineering
solidworks 2008
quad-core intel® xeon® 5300-series 64-bit