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Ask the Stamping Expert: How can we maximize our tooling’s hits per service?

March 10, 2016 | By Thomas Vacca

Q: We are running high-strength, low-alloy (HSLA) brackets for a large aerospace firm. We cannot get the hits per service we need from our tooling and are struggling to meet production requirements. Any advice? A: Regardless of how many hits per service you get off a tool, you always want to...

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Ask the Stamping Expert: Why does tooling fail during coining and forming operations?

March 10, 2016 | By Thomas Vacca

Q: In our stamping division, we do a lot of coining and forming of 300 and 400 series stainless steels from 0.030 to 0.090 in. thick. We coin up to a 30 percent reduction in thickness and form multiple bends with very tight radii. Our punches and form die inserts fail. They break, crack, chip, or...

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Ask the Stamping Expert: How do I calculate shear pressure when figuring stamping die tonnage?

March 9, 2016 | By Thomas Vacca

Q: I read the article “How can I reduce snap-through condition effects?” in the September/October 2012 STAMPING Journal®. If I understand the article correctly, you do not want to stagger the punches too much to prevent the stored energy from releasing before the next set of punches hit. If...

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R&D Update: Lightweighting in the automotive industry using sheet metal forming, Part 2

March 9, 2016 | By Ali Fallahiarezoodar, Taylan Altan, Ph.D.

Editor’s Note: Part I of this article appeared in the January/February 2016 issue.

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Ask the Stamping Expert: Why does my tooling yield such big variation?

March 9, 2016 | By Thomas Vacca

Q: My company stamps right-side and left-side links for conveyor belts. The peanut-shaped parts, made in a changeover tool, are about 0.1 in. thick, 1.5 in. wide, and 3 in. long. Half of the part (lengthwise) is coined offset, one material thickness in depth. This is in addition to a number of...

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Ask the Stamping Expert: What's the best-in-class process for developing a progressive-stamping die?

March 8, 2016 | By Thomas Vacca

Q: What is the best-in-class process for developing a new progressive-stamping die? A: Many tool builders think the process of progressive-die development is undefined and difficult to predict, and therefore takes way too long. Development is costly. It ties up engineering, design, toolroom...

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Ask the Stamping Expert: What type of hydraulic clamps are best for quick-change setups?

March 8, 2016 | By Thomas Vacca

Q: What type of hydraulic clamps do you use in your stamping presses for quick-change setups? A: The type of clamp is insignificant; there are many suitable brands. How you use the clamp is the important thing. Before you get into a true lean die-change system, you need to do some homework....

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Die Science: Understanding deep-drawing and stretching variables for best results

March 4, 2016 | By Art Hedrick

Numerous variables affect the success of a deep-drawing or stretching process. Some are major and some minor, but you’ll need to take all into consideration when designing, building, and troubleshooting a drawing or stretching operation. Sheet and Coil Material Material is a major...

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Improving metal forming performance

February 18, 2016 | By Bill Frahm

What does your stamping operation do to improve metal forming efficiency? The key is to learn more about the metal, conduct practice runs in the virtual world, and pass along knowledge to co-workers.

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Modern hydraulics: Six advanced capabilities for stamping presses

February 2, 2016 | By Jeffrey Grube, Jens Schmitt

Advanced hydraulics and intelligent drive systems are now available to provide greater metal forming precision and to improve stamping press productivity and product quality.

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At WITS end with wrinkles, tears, springback in AHSS?

January 26, 2016 | By Darrell Quander Jr., George Schreck, Jim Landowski

: Stamping AHSS comes with forming challenges such as wrinkling, tearing, and springback. A servo’s controlled force can help resolve some of those problems—and keep you from tearing your hair out.

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Ask the Stamping Expert: Should light curtains stop a press even if it is traveling up?

January 8, 2016 | By Thomas Vacca

Q: We have some manual presses set up in a single part load-and-stamp production mode. The press is equipped with light curtains. When the operator activates the press buttons, he has to wait until the tool runs through the entire press cycle before he can reach into the work area. If he tries to...

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R&D Update: Lightweighting in the automotive industry using sheet metal forming, Part 1

January 7, 2016 | By Ali Fallahiarezoodar, Taylan Altan, Ph.D.

The Ohio State University's Center for Precision Forming provides an overview of design considerations and materials used in lightweighting in the automotive industry in the first part of a two-part series.

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Die Science: How to destroy a press

January 6, 2016 | By Art Hedrick

It’s amazing how many stampers and tool and die shops negate the importance of the press. Shops often “maintain” a press when it stops working. In other words, they repair the press, but they don’t maintain it regularly. I could have just as easily named this article “How to select...

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