STAMPING Journal®

November 2007

STAMPING Journal® is the only industrial publication dedicated solely to serving the needs of the metal stamping market. In 1987 the American Metal Stamping Association broadened its horizons and renamed itself and its publication, known then as Metal Stamping. Print subscriptions are free to qualified stamping professionals in North America.


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Selected articles from the November 2007 issue available online:

Rolling bolster die changes

Metalforming lessons learned abroad

November 6, 2007

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After World War II, equipment manufacturing companies in Asia and Europe designed production systems that were more flexible in nature than systems in the U.S., which were designed for high-volume production. Today this trend is hitting U.S. shores, and U.S. stampers are looking overseas for inspiration in finding ways to work more efficiently.

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Compression deformation diagram

Piercing, cutting aluminum sans slivers

November 6, 2007

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Slivers are the result of the aluminum interfacing with the cutting sections or punches. To reduce the production of slivers the severity of friction at the point where the two surfaces interface must be reduced. The general rule for cutting materials is the softer the metal the smaller the cutting clearance.

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Dome height

Dissecting defects - Part II

November 6, 2007

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Editor's Note: This article is part of a three-part series. Part I categorizes defect types and discusses the factors that affect formed part quality; Part II covers various destructive and nondestructive tests for evaluating incoming material; and Part III is an introduction to process monitoring systems.

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Conveyor Maintenance

Extend conveyor life with maintenance, modification

November 6, 2007

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To the naked eye, conveyor design doesn't look looks it has progressed much in 40 years. The conveyors of today are engineered with unique design elements and innovations that make them more versatile than ever for today's metal stamping applications. A conveyor with the latest technologies is good only if it is running properly. Simple preventive maintenance techniques can save stampers time, money, and a lot of headaches.

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Untreated Staking Punch

Seeking tooling longevity

November 6, 2007

BorgWarner Inc., a drive-train developer and manufacturer of four-wheel-drive and traction control parts for the automotive industry, was having a problem with punches used to deform the ends of shafts (axles) in the reduction carrier and differential carrier.

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