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Draw forming, Part V

November 7, 2006 | By Edmund Herman

The remoteness of the energy-affecting elements contributes to the differences between the net shape and non-net shape processes. This additional difference helps drive the nature of the net-shape processing theory.

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Die Basics 101

October 10, 2006 | By Art Hedrick

Editor's Note: "Die Basics 101" is a 17-part article.

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Transfer technology

October 10, 2006

Venest Industries, an automotive parts supplier based in St. Catharines, Ontario, Canada, needed an automated transfer system that could be parked away from the machine bed during progressive operations and die changes, so that new dies could be delivered to the press via an overhead crane.

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Die Basics 101: Part X

October 10, 2006 | By Art Hedrick

Cutting is the most severe metalworking process that takes place in a die and shouldn't be taken lightly. Cutting Basics Cutting metal requires great force. For example, it takes approximately 78,000 lbs. of pressure to cut a 10-in.-diameter blank from 0.100-in.-thick mild steel. Consequently,...

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Drawing on new experiences

October 10, 2006 | By Dan Davis

In the past metal forming in the appliance industry meant giant presses with expensive tooling. Lead-times were forever, and change didn't come easy. Whirlpool Corp. in Fort Smith, Ark., is taking a new approach to metal forming, and flexible technologies are the key.

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Ask the Stamping Expert: Overcoming deformity by design

October 10, 2006 | By Thomas Vacca

Achieving typical goals in stamping, such as zero development and fewer labor requirements, is made easier when the progressive die strip is kept level through the entire progression. Keeping the strip level can eliminate wave problems caused by incorrect pilot/lifter use occurring in punch forming.

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Die Science: Setting up progressive dies - Part II

October 10, 2006 | By Art Hedrick

Proper feeding, scrap removal, and shut height calibration are essential for good die setup.

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Multipoint-control die cushion systems for stamping complex parts - Part II

October 10, 2006 | By Ajay Yadav

Editor's Note: This article is Part II of a three-part series that discusses multipoint-control (MPC) die cushion systems applied to the forming of stainless steel double sinks. Part I, which appeared in the September issue, discussed novel press and design concepts using MPC systems. Part III,...

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Die Science: Setting up progressive dies - Part I

October 3, 2006 | By Art Hedrick

Editor's Note: "Setting Up Progressive Dies" is a two-part article. Part I discusses press and die cleanness, die alignment, clamping procedures, and preliminary shut height calibration. Part II discusses the process for getting metal into the die, setting the pitch, feed release, and other factors...

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Doing its level best

September 12, 2006

A precision roller leveler, installed between the coil payoff reel and the press equipment, allows an operator to stretch the edges when necessary to compensate for loose centers or stretch the center to compensate for loose edges before the blanking operation.

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Draw forming, Part IV

September 12, 2006 | By Edmund Herman

The relationships among part geometry, tool geometry, and control of the processing inputs are significantly different between the net shape and non-net shape processes.

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Holding the line on metal costs

September 12, 2006 | By Ken Shoop

Stampers and roll formers can look at edge trim, heads, tails, skeletons, and coil damage for ways they can reduce scrap to hold the line on metal costs.

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Die Basics 101: Part IX

August 8, 2006 | By Art Hedrick

Part VIII of this series discussed some of the specific mechanical properties of metals—ductility, elongation percentage, tensile and yield strength, and hardness—and how to derive these properties. This article describes other important mechanical properties, as well as a few behavioral...

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Getting hydraulic press problems under control

August 8, 2006

Arco Industries Inc. bought a 15-year-old, 500-ton Tranemo hydraulic punching press with an antiquated control system. For about one-quarter the cost of a new press, Arco was able to rejuvenate an obsolete press by providing it with contemporary levels of control and productivity.

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Feed to registration

August 8, 2006

For applications such as clutch disks, oil seals, oil filters, and other round stampings, feed to registration with scroll-slit material can reduce scrap rates and, in some cases eliminate the need to retool the job.

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