Dimensioning Weld Locations 1

[vonsteimel]

Greetings,
I was wondering what the best way to dimension weld locations were? Usually I show the weld in the drawing and then add the locational dimension to the weld shown. But how is the proper way to do this? It was never addressed in Drafting school nor engineering school, as most welds are either incrementally spaced or all across.

However there are some that are neither/nor and must be specifically dimensioned. I've attached an example sketch... Specifically, how to dimension the 1.00 dim...

Should I dimension a datum point, which could be referenced in the welding symbol somehow? I cannot find anything in my standards book nor my machinists handbook?
please advise.
Thanks,

VS

 

[twimer]

Check out ANSI/AWS A2.4-98. You have a couple of options. See attached.

The last two are my personal preference, but any should be valid.

 

[ronw06770]

I LOOKED AT YOUR SKETCH AND IT'S PROPER TO CALL A FILLET WELD AND DIMENSION THE LOCATION AND THE LENGTH THE WAY YOU HAVE IT. YOU CAN ALSO CALL THE LENGTH ON THE PART ALSO. I DID NOTICE YOUR SYMBOL IS DRAWN INCORRECTLY. THE RIGHT ANGLE LEG OF THE TRIANGLE IS ALWAYS ON THE LEFT. AND THE HYPOTENUSE LEG IS AT 45 DEGREES. THE SIZE OF THE WELD ON THE LEFT, AND THE LENGTH TO THE RIGHT. USE AWS SYMBOLS REF A2.1-93

 

[vonsteimel]

Ah, good eye ronw05770... It looks like its drawn at 60 instead of 45 also. It was just something quick I whacked out to get my question across.

Twimer, I cant seem to be able to download or open any of those files. Can you re-upload for me? I appreciate the advice.
Thanks,

VS

 

[twimer]

Sorry, new to this. Try these...

 

[vonsteimel]

Excellent! Thanks Twimer. I've looked and looked for this stuff and could not find it anywhere. Its seems there are few people who have been in this situation and know how to handle it correctly.
Now I assume it is the "Symbol" illustration that is to be put on the drawing? And that the "Weld" illustration is just depicting what the weld(s) will look like? Or are both the "Weld" and "Symbol" illustration acceptable to use on a drawing?
Thanks,

VS

 

[twimer]

Correct, the "weld" illustration is just a depiction of what the actual weld looks like, and the "symbol" illustration goes on the drawing. Glad it helped!

 

[pmarc]

I just got one question to the pictures attached by twimer (which are taken from the standard, as far as I understand):
What are the tolerances for the dimensions shown on the pictures?
I assume there have to be some tolerances, otherwise the defintions of lengths and locations of the welds are incomplete.

 

[vonsteimel]

I'd assume the tolerances are what ever you set them at, just as on any other drawing. I've never seen any standard tolerances before, it all depends on the application and the accuracy you require.
i.e :
FRACTIONAL +/- 1/32
X.XX +/- 0.01
X.XXX +/- 0.005