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  • Users: Vimalmechs
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  1. Vimalmechs

    Doubt in deriving datum

    Hi PFA. Is it a right approach to derive DATUM C from TWO HOLES (2X) ? Regards Vimal.http://files.engineering.com/getfile.aspx?folder=bce17e23-4ffd-43f6-8dab-1f4b5569c1de&file=20141013_125834.jpg
  2. Vimalmechs

    doubt on frame welding call out

    Hi, I got a doubt in between reviewing a square tube weldment. Th designer called the square weld in th drawing(PFA). I beleive the welding call out should be flare bevel based on cost & practical easiness. Please help me to confirm whether I am right or wrong?. As well please suggest me any...
  3. Vimalmechs

    Plastic machining accuracy & surface finish.

    Hi, I am reviewing a circular part, made by "polypropelene, homopolymer, natural".Which is having o-ring groove for vacuum sealing and oring groove finishing requirement is 16Ra Circular Lay. Most of the dimensions are in 3 decimal(inch)accuracy and +/-.005(for general feature location)...
  4. Vimalmechs

    doubt about perpendicularity in diameter application.

    Hi, I got a doubt in between learning tolerance stack.I am trying to convert the dimension to dimension with equal bilateral tolerance.please refer the dimension located at square one in image. The output is 30+/_.03 or 30+/_.10 ...
  5. Vimalmechs

    GD&T Application doubt

    Hi all, PFA, I am trying to control the width of the polishing area all around the profile(Hatched area in the image).My doubt is , applying profile tol is a right approach to achieve? . or is there any other approach to control the polished area by GD&T control?.i am with ASME Standard...
  6. Vimalmechs

    "Alodine time saver finish!!

    Hi , Is there a finish with below description ? "alodine coating , AAM10C12CC2A41 (215R1) with "time saver" finish" i have received this note from my customer to update the drawing but m not able to find out any document which explains the same. Will anyone please help me to understand this...
  7. Vimalmechs

    HOLE PATTERN POSITION CONTROL- FCF SUGGESTIONS

    Hi all, Please have a look on the PFA. My Functional requirement is, I want to control the movement of hole pattern.” Pattern should be parallel to DATUM A or B or together, holes should shift together and hole pattern can move within .04 dia zone. 1) All the holes should be within...
  8. Vimalmechs

    DATUM from the hole pattern

    Hi all, PFA. The figure is an assembly came for review. Which is having 3 pads welded on a sheet metal base.Here i am not able to understand that how DATUM J is deriving from the 5X holes. I have seen that datum deriving from 2, 3 and 4 holes. but i'm ended up nowhere to understand the datum...
  9. Vimalmechs

    Doubt on parallelism to control the point

    PFA. Function of the assembly: ITEM 2 is spherical shaped. It is assembled inside the flat bottom hole feature of ITEM 1 (REFER HATCHED LOCAL SECTION AREA).I want the top contacts points of spherical ball within “.0005”. The plane derive from the three points should be within “.0005” parallelism...
  10. Vimalmechs

    Doubt on application of GD&T callout, Datum shift.

    Hi, I am having doubt on GD&T application. This is concerned with a drawing came for review. PFA. In the figure GD&T frame calls Datum C with MMB modifier. Case 1: Datum C is a plane. As per my knowledge we should not apply MMB to the datum deriving from Planar surface. So wrong GD&T...
  11. Vimalmechs

    Doubt on datum

    Hi all, PFA. this is a single part. After wire cutting done from a disc. There will be 3 pieces from one disc. here my doubt is how this GD&T frame applies during production of this part(before wire cutting into 3 pieces).I wanto drill the holes before wire cutting.but c datum surface wont...
  12. Vimalmechs

    Doubt on Datum Callout

    Hi all, Recently i got a doubt on datum callout in a TOP GD&T frame. PFA. Hope to hear back. Vimal

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