Drawing dimensioned using a tooling ball
Drawing dimensioned using a tooling ball
(OP)
Hello,
I'm a mechanical engineering that closely works with our manufacturing shop, and often have to make suggestions on how to properly locate and later inspection parts during manufacturing. Recently I came across a part holes on which need to be dimensioned with respect to another hole. The problem is that the holes that we want to use for locating is on an angle to my target hole, so I can't use the positional tolerance in a standard way. My one thought was to use a Tooling/Machinist Ball to define datums on the drawing. However, that implies that I would have to have instructions on the print explaining what dimension tooling ball to use and how to locate the part in the machine.
In my experience, I've never seen anything like what I'm describing. So does anyone have any input on whether my logic is solid, and perhaps a sample drawing that uses tooling ball for dimensioning?
thanks in advance for your time!
Best,
Vas
I'm a mechanical engineering that closely works with our manufacturing shop, and often have to make suggestions on how to properly locate and later inspection parts during manufacturing. Recently I came across a part holes on which need to be dimensioned with respect to another hole. The problem is that the holes that we want to use for locating is on an angle to my target hole, so I can't use the positional tolerance in a standard way. My one thought was to use a Tooling/Machinist Ball to define datums on the drawing. However, that implies that I would have to have instructions on the print explaining what dimension tooling ball to use and how to locate the part in the machine.
In my experience, I've never seen anything like what I'm describing. So does anyone have any input on whether my logic is solid, and perhaps a sample drawing that uses tooling ball for dimensioning?
thanks in advance for your time!
Best,
Vas





RE: Drawing dimensioned using a tooling ball
See the diagram at the bottom of the page here for an example:
https://www.carrlane.com/catalog/index.cfm/2782507...
Dan - Owner
http://www.Hi-TecDesigns.com
RE: Drawing dimensioned using a tooling ball
I don't know about telling someone to locate it a certain way in the machine. I think that just dimensioning to a tooling ball (or from, if it's a datum) will tell them enough to get it done, and they can figure out the rest.
It's also been pretty common practice to use a set of 3 tooling balls to create a complete datum reference frame. You might have 3 balls, the first origin ball being a cartesian coordinate 0,0,0 with the second ball establishing the X vector and the third ball establishing the Y vector, with all 3 establishing the X-Y plane and typically your primary datum for any holes.
Elaborate tooling might end up having many dozens of tooling balls which make up many datum reference frames.
Tooling balls are great to use whether it's a complicated tooling fixture or a pin/spindle/rod with a precision conical taper in it that you must gage appropriately.
RE: Drawing dimensioned using a tooling ball
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Drawing dimensioned using a tooling ball
Cheers
Greg Locock
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RE: Drawing dimensioned using a tooling ball
RE: Drawing dimensioned using a tooling ball
Dan - Owner
http://www.Hi-TecDesigns.com
RE: Drawing dimensioned using a tooling ball
Thanks for the input. My first time posting, so in the future I'll be more careful about where I post.
From your input, and from what I found in my research, I have enough info to continue. I didn't mention this in the beginning, but I am the "customer" who got the drawing. The client was asking for an input, and I was trying to be thorough when responding to them.
Thanks again!