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cutouts pattern

cutouts pattern

cutouts pattern

(OP)
Hi

before I created this post I did a lot of research without any significant success, that's why it is time to ask for you help as you always provide good feedback for my further research

I prepare a drawing, we are considering European ISO

I think it is more about linear dimensioning and tolerance analysis, not sure if GD&T must be applied here (however e.g a base might be attached to 5640, which will define axis of symmetry)
All tutorials usually refers to hole patterns.

Top of the drawing is an original drawing - and it is a mess in my opinion.
There is a common part between ( it was on original drawing but this can be used in future proposals I think).

Ok - what I want to achieve during machining?
The process goes like this: there are cutouts machined all along raw length.
After these cutouts are finished, total length is set up by cutting up to necessary total length, keeping all symmetrical.
There is also a way to change the order.

Sounds easy? Not sure if drawing or proposal clearly describe the intention.

Generally - The question applies to other cutouts patterns similar to this case. How to control it correctly and keep eg. tolerance like in this part?

RE: cutouts pattern

At a quick glance of the geometry, I recommend you review width-features: their use as Datums, fig 4-13 in Y14.5 (center-planes) and how to position non-cylindrical features, para 7.4.5.

RE: cutouts pattern

(OP)
Hi,

this is somehow linked to mckski latest question, Nescius mentioned fig7-26 as a reference

I took a closer at this figure and compared to my drawing.

Do I need to repeat o|0,2|A|B|C at every dimension or is it obvious that 0,2 tolerance field is common for all 3 dimensions?

Now this seems to be easy but if answer to question above is "yes", then where is the best place to put one common tolerance frame for all 3 cutouts?



RE: cutouts pattern

(OP)
or in other words:

see Fig 7.44 - how it shall be described if every hole have completely different size but I want to keep tolerance as a common for all of them?

RE: cutouts pattern

@cervantes: What is the difference between datums A and C in your post from May 16 07:56 ?

"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future

RE: cutouts pattern

(OP)
sorry, naturally C is in wrong place
my bad

we can discuss fig 7.44 - it will be easier I think

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