Hello,
I am looking at a drawing for a forged part and some of the numerical dimensions are followed by the word "SINK" followed by a larger or smaller number than the preceding or nominal dimenension. I am not sure which number applies to parts made from the 1st production run versus the last run before dies are "resunk".
Example 1 - in a rectangular depressed pad, the width is given as ".406 SINK .437". Does this mean the parts on the 1st run are run at .406" & die is allowed to wear until this rectangular depression is .437" wide?
Example 2: The cross section of this depressed pad has the thickness from the pad down to the bottom of the part dimensioned (and not the pad depth) as: ".500 SINK .531" Again as with Example one - what does the .537" mean w/respect to the original nominal dimenion of .500"? Does this tell the forge shop to resink the die when this pad thickness increases from .500" to .537" due to die wear?
Thanks for any education that anyone can give me on reading a blueprint for a forged steel part.