Page 39 - MetalForming June 2016
P. 39

                   The Science of Forming
dimensions, thickness readings at crit- ical locations, proper depths and every other measurement that could be made.
Coils of sheetmetal come marked with two identification numbers—heat number and the coil number. The heat number does not provide sufficient tracking information—many heats of steel, for example, weigh 300 tons and can create thirty 10-ton coils that are further reduced in size. However, the coil number can be tracked all the way back to the original heat with production notes and data taken along the way.
Recommendation: Keep the coil number attached to all racks, bins and groups of parts from a specific coil all the way to product assembly. That allows the end user of the part to trace back to the coil source, processing and any variations or problems. MF
Answers: A-5, B-3, C-4, D-1, E-2, F-6
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