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  • Users: nmine
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  1. nmine

    Slot pattern Datums

    @jassco would the datum feature symbol just be added inline with the basic dimension dimensioning slot centers?
  2. nmine

    Slot pattern Datums

    @Garland23 Thanks for the reply! So this is Constrained DOF for Primary Datum Features. If the flat surface of the plate was datum A then you applied datum feature symbol B to a slot, this would just then constrain the remaining DOFs not over constrain right? Similar to if you had B and C as the...
  3. nmine

    Slot pattern Datums

    I have had this question for sometime and have only seen instances where there is a hole as datum b and plane of a slot as C. What if you have a flat plate with two slots and you want to control the outer edges of the plate using a profile tolerance with respect to the slots (slots are...
  4. nmine

    GDT Bent Sheet Metal Parts

    Alright, thanks all for the input.
  5. nmine

    GDT Bent Sheet Metal Parts

    So then for FAI, would the supplier supply both a flat pattern and then a bent part to inspect?
  6. nmine

    GDT Bent Sheet Metal Parts

    Hi @mfgenggear all of the parts I am designing will be laser cut/CNC press brake due to small qty. The design will change long before we get to stamping quantities if ever they do. I do have larger parts where I would like to leave more room for linear deviation where angular is more important...
  7. nmine

    GDT Bent Sheet Metal Parts

    Thanks for the feedback! @3DDave I find that when everything is referenced back to ABC, features can move too much and the fix is just make the profile tolerance large enough to accommodate which can introduce further issues. For example, the 2.8 mm holes, If I did not have a new D datum, I...
  8. nmine

    GDT Bent Sheet Metal Parts

    Hi, I have started to design a lot of bent sheet metal parts. I am comfortable using GDT on machined parts or flat sheet metal parts but applying it to bent sheet metal parts can be sometimes confusing. For parts like the one below, is it easier from an inspection position to use profile...
  9. nmine

    Datum on hole pattern

    Hi 3D Dave, Yes I have taken a course a while back but I am definitely not an expert. I do not have the standard handy though. I'm perplexed at how I can use the four hole pattern as datum C but control the position of the green holes tighter than the position of the group ( a pattern within a...
  10. nmine

    Datum on hole pattern

    Hi, I want to use a pattern of holes (4 holes) as a tertiary datum (datum C). The catch is I want to control the position of two of the holes with respect to each other tighter than that distance between the other group of two holes. Can this be done using gdt? If so how?
  11. nmine

    Sheet Metal Part GDT

    Hi Dave, Thanks for the reply. So is the setup below what you mean (63 dia dim)? Also how would you relate the bolt holes to their cutout in detail A?
  12. nmine

    Sheet Metal Part GDT

    I have a large sheet metal enclosure base that has lots of panel mount connector holes. How do you go about applying GDT when one datum setup will not work for all of the different cutouts (for example bolt pattern around a larger connector cutout or a hole being perpendicular to a surface that...
  13. nmine

    Dimensioning/Tolerancing of Bent Sheet Metal Part

    Okay thanks all for the replies. So with the "unless otherwise specified, all surfaces profile tolerance" general note, say you have a part like below with datums and a thickness specified like so. How do you know what surface is used to position the section of the part shown in detail J (red...
  14. nmine

    Dimensioning/Tolerancing of Bent Sheet Metal Part

    Hi drawoh, Thanks for the response. That is correct, I only care about the bent state. So you are implying an all over profile tolerance with a plus minus tolerance on thickness perhaps? My question would be then, would it be harder to inspect the bent sections toleranced in this manner...
  15. nmine

    Dimensioning/Tolerancing of Bent Sheet Metal Part

    Hi, Was wondering how people would usually dimension/tolerance the outer perimeter of a part like this. If the part was not bent, a profile tolerance around the outside perimeter would be nice and easy. Since the part is bent, it makes it a little less intuitive to use a profile tolerance...

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