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  1. Vimalmechs

    Doubt in deriving datum

    Greenimi and Dave, thank u for the detail explanation.
  2. Vimalmechs

    Doubt in deriving datum

    hI greenimi,As per The FCF attached with 4X DIA.281 holes, 1) primary "planar datum A" is from three points. 2) Secondary planar datum is from axis. 3*) Tertiary planar datum (Datum C) from three axis. (Datum B and other 2X dia .XXX). Is it possible to derive a plane from three axis...
  3. 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
  4. Vimalmechs

    doubt on frame welding call out

    Hi all, thanks for the reply. here the Material is cold formed steel tube for structural applications.I have red lined such a way to call "2X FLARE BEVEL" for two sides and "2X FILLET" for other two sides.I think i shouldn't call all around fillet or all around flare bevel weld here. I believe...
  5. 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...
  6. 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)...
  7. Vimalmechs

    doubt about perpendicularity in diameter application.

    Hi Pmarc, Thank you for the detail explanation. Pmarc, please refer the attachment. I am just clarifying my understanding. red dash lines are tol zone, and green are axis of feature of size.At feature MMC, the axis can tilt with in dia 2 tol zone as per square 1 and 2. And square 3 is...
  8. Vimalmechs

    doubt about perpendicularity in diameter application.

    Pmarc, Am trying to calculate the overall dimension as per fig. Square 2 is th FCF am concerned.http://files.engineering.com/getfile.aspx?folder=3eb35145-7f3f-44b6-b261-eb12243f3cc8&file=tmp_20140609_211656-1-570749305.jpg
  9. Vimalmechs

    doubt about perpendicularity in diameter application.

    Pmarc, I am learning Worst Case tolerance stack up. That is the reason i am looking for "30-.03-.04-.06= worst inner boundary" instead of any other value.
  10. Vimalmechs

    doubt about perpendicularity in diameter application.

    Kenat, what is missing in input ?. Pmark, I am talking about RAME.the below is right based on RAME ? Virtual condition= 30+.03+.04 Resultant condition (worst inner boundary) = 30-.03-.04-.06 Vimal
  11. 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 ...
  12. Vimalmechs

    GD&T Application doubt

    Jnieman, Sorry for late turnback. Hatched area is oring mating surface.and rest surface also functionally important.here I have applied profile of a line and with .020 tol zone value. I have removed two profile from th drawing and kept only one profile tol.attached to center line of hatched...
  13. 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...
  14. 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...
  15. Vimalmechs

    Methods for Dimensioning a Simple Plate with Holes

    Hi I got a doubt here, Primarily, as per my understanding from MrGearhead, Hes with a base plate having a reference "key hole". and other 5 holes are referring the key hole. And i am guessing up, the functionally is, there is a top plate for this bottom plate.The key hole in the bottom plate...
  16. Vimalmechs

    How to refine parallelism on two self datum plates

    bxbzq, Can you clarify some minor doubts. PFA. 1) Dimension references (Keyway-slot,31 & 41) are different in assembly and part level drawings. Why it is so? 2) Your functional importance is only in between plates.No relation with ur weldment. 3) Can you provide the "female part-channel"...
  17. Vimalmechs

    HOLE PATTERN POSITION CONTROL- FCF SUGGESTIONS

    My part is a sheet metal.Thickness is not a concern for me.Thats why i have avoided. I am using ASME. Vimal VV
  18. Vimalmechs

    HOLE PATTERN POSITION CONTROL- FCF SUGGESTIONS

    hI, please refer this attachment instead of previous one.http://files.engineering.com/getfile.aspx?folder=1daabd6a-0bca-4987-aad8-2288359e4c7b&file=hole_pattern_control.jpg

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