【转帖】machining tips

yang686526

machining tips
here is some good info for anyone that is either new to the profession, or need a refresher.
chris,
great web page....
cheers,
anna wood
sw 2007 sp4.0, winxp
dell precision 380, pentium d940, 4 gigs ram, fx3450
i know a few folks around here that could use such a review.  nice that they offer a .pdf as well.  thanks for posting it.
regards,
nice link ctopher a star for you.
i am sure there will be the normal it is not a designers job to make the machinists job easy comments however.
as a former toolmaker who now works in design, the author has covered the topic very well.
thanks for posting ctopher. have a star
thixoguy
thanks.
i'm happy it works for everyone. it's great to have and to go back for reference often. a lot of good info in one place.
chris
solidworks 07 4.0/pdmworks 07
autocad 06
great resource chris!  have another star.
the only item that i take exception with is making the the inclusion of contact info on the drawing mandatory.  this would be better included in the po or related instructions.  it would not be cost effective to incorporate a drawing change due to a personel change or a project handoff.
chris,
    a great reminder for us all. a star for you.
bradley
solidworks premim 2007 x64 sp4.0
pdm works, dell xps intel(r) pentium(r) d cpu
3.00 ghz, 5 gb ram, virtual memory 12577 mb, nvidia 3400
quote:
i am sure there will be the normal it is not a designers job to make the machinists job easy
ahhh... but it is the designers job to assure that the b/p reliably calls out the required features, that the b/p is unambiguous, and that the thing on the b/p is able to be manufactured.
... and if that is accomplished, the result makes life easier for the machinist.  therefore it is actually in the drafter/designers best interest to consider dfm.
chris, nice link.  haven't had a chance to look closely but only one thing really stood out as being what i'd consider bad advice:
quote:
the note on who to contact with questions should be a mandatory feature in any drawing!
  potentially very useful for prototypes (it's made me think about adding it as standard to our prototype stamp) but meaningless on production as staff change et. also for production the machine shop should probably contact the purchaser on the po or manufacturing engineer (especially in larger companies) not the designer/engineer directly etc.
i especially liked the section
quote:
provide a dimensioned or semi-dimensioned 2d print, even when using solid modeling
this matches my limited experience in this area.
ajack, normally i'd be the one saying that but i like what nicke put.  when it is possible to make the machinists job easier without sacrificing part definition etc then we should, however part function and supporting inspection take priority.  plus, a lot of peoples attempts at 'making life easier for the machinists' don't, they just make life harder for inspection/ensuring function of the part!  at the end of the day though we need to make sure the part can be made cost effectively.
kenat, probably the least qualified checker you'll ever meet...