Page 33 - MetalForming February 2020

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extra processing also results in a steel grade that has reduced property vari- ability compared with other grades, which should improve productivity and quality at the metal stamping company. A metal former specifying EDDS will be charged accordingly for this extra step required to achieve the EDDS properties.
However, a metal former may receive the equivalent of a free upgrade similar to two-day shipping on pack- ages due to extra space on the truck. If the metal former’s order of grade, thickness and width matches with open space on the casting and rolling sched- ule, it may be more cost-effective for the steel mill to slot the order into this position rather than wait for a slot more in line with the minimum require- ments. The metal former won’t be charged for the extra processing, just for what was ordered.
Not to worry, as the product received still meets the order requirements. However, changing a sheet metal sup- plier opens the possibility of a different production path. The new metal will satisfy the minimum requirements, but possibly in a different way, and a metal former’s manufacturing parameters may not be aligned with the adjusted property ranges. This leads to reduced productivity and scrap as stamping press operators figure out possible changes in coil processing, cut-edge performance and dimensional accu- racy (springback).
Minimize risk by communicating to the supply chain, including internal purchasing, manufacturing and quality departments, the metal characteristics required for success. MF
Hear Danny Schaeffler’s presentation The Role of Engineered Lubricants in Advanced Automotive Body Structure Construction, at MetalForming’s Lubri- cation Technology for Metal Formers and Die Shops Meeting, February 12- 13 in Novi, MI. Visit www.metalform- ingmagazine.com/lubrication-technol- ogy-for-metalformers/default.asp for more information and to register.
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