flatness of a line

[Paul Sarrach]

There is a flatness callout for a O_Ring, checks are done every 60 degrees, he want the flatness for points in a line. Which is the range. I have never used what if statments, but is there a way to check this? If you need more info please asked.

[bw_bob]

Good morning

Are they asking for a flatness check on a rubber o-ring..surely not ???

[rebeldude]

Paul,
Why a line, It only makes sense to make it a plane. In fact, it may have to be a plane to even check flatness

[Paul Sarrach]

The only form a line has is straightness. You may have to change workplanes and check straightness of a line to get the flatness you are looking for.

Steve Thankyou. I have never used straitness before either. And I been doing this a long time.

Rebel, correct you need a plane to check flatness, and it has to be more than 4 points.

bw_bob it not the rubber o-ring, its the area the ring is going to be placed.

steve "what?" Paul What?


Thanks all.

[TigerShark]

Hi,

That could be Flatness between 2 radial line ( or 2 different Radious), if so, make center of ring 0,0, then shift to Polar system, touch pints between smaller and bigger radius.

HH

[rebeldude]

Paul,
I guess you meant to say it is O-ring material, but not an actual "O-ring"?

[Paul Sarrach]

You guys are supposed to know what I mean, thats part of you job desciption, remember reading engineers and ********* minds. SO, my should be easy.

no not the o-ring material the o-ring pocket, hows that. Better?

[rebeldude]

LOL.... I FORGOT !!!

[Paul Sarrach]

Here is the test to find whether your mission on earth is finished. If you're alive, it isn't.

[rebeldude]

LOL... YEP... WHEN MY MISSION IS FINISHED, I WILL BE RICH AND NEVER HAVE TO STRIKE ANOTHER LICK AT WORK!!! LOL

[Rich P]

Hey Paul
We mnaufacture a part that has an O-Ring Groove machined in it
we have a groove diameter and slot width called out on this part

If they are looking for form deviation shouldn't it be roundness or cylindricity?

[craiger_ny]

Steve Thankyou. I have never used straitness before either. And I been doing this a long time.

Rebel, correct you need a plane to check flatness, and it has to be more than 4 points.

bw_bob it not the rubber o-ring, its the area the ring is going to be placed.

steve "what?" Paul What?


Thanks all.

An o-ring seat. That is what you are talking about right? An o-ring seat. I never thought flatness of an o-ring seat would require this many posts especially with this amount of confussion. Paul ,are you an engineer or something?

[Paul Sarrach]

Hey Paul
We mnaufacture a part that has an O-Ring Groove machined in it
we have a groove diameter and slot width called out on this part

If they are looking for form deviation shouldn't it be roundness or cylindricity?

They want numbers, from cut sections. every 60 degrees

[cmmguy]

Paul, you really should limit the drinking until at least after noon.... Your posts seem like a cell phone call with a bad connection.

How many points are you taking on each cross section?
For each cross section you should rotate the work plane to that view so that the straightness is "viewed" correctly. IE, if the oring seat is in the XY plane and you want the cross sectional straighness of the section that cut through the plane at the center, your view should be ZX or YPLUS. other wise the straighness wont be right

[Paul Sarrach]

Ok here it is, a pic of the oring SEAT open in paint and make alittle larger to read fine print

Craiger ok ok ok oring seat, Whatever!!!! I am Squirrelly, not an engineer, but after talking to them I get even more confused, than I normally am, and its even harder to put in words what they cannot even say???? What? . So I really need all this booze before noon, just to keep my self from hurting them