Dieology LLC

Art Hedrick

Contributing Writer
Dieology LLC
8579 River Oak Circle
Greenville, MI 48838


Phone: 616-225-2170
www.dieology.com
Contact via email
Author of the "Die Science" column in STAMPING Journal®, Art also has written technical articles on stamping die design and build for a number of trade publications. A recipient of many training awards, he is active in metal stamping training and consulting worldwide.
spring pins

Die Basics 101: Part XII

February 13, 2007

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Slug pulling, which occurs when scrap metal—the slug—sticks to the punch face upon withdrawal and comes out of the button, or lower matrix, is a serious problem that can damage parts and dies. Various methods can help reduce the occurrence of slug pulling. Air Vents Putting air vents in...

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Solving punch breakage problems - Part III

February 13, 2007

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Numerous factors contribute to the premature failure of piercing and cutting punches. In addition to problems with the punches, such as tool steel or problems caused by EDM and grinding, the press can cause problems through deflection, and bridge strippers also can cause punch breakage.

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Cutting shear

Solving punch breakage problems - Part II

January 9, 2007

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Cutting shear, or the angle ground into the end of a punch, has a big effect on punch deflection and breakage, as well as press tonnage required. Retainers, which hold the punch to the die shoe, also are important. The backing plates, ball lock punch retainers, and headed styles of punches and retainers all require careful consideration.

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Piercing punch burr

Solving punch breakage problems - Part I

December 12, 2006

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Numerous factors contribute to the premature failure or breakage of piercing and cutting punches. Two common factors are operator error and incorrect die cutting clearance.

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Slug pulling diagram

Die Basics 101: Part XI

December 12, 2006

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Slug pulling is a serious problem in a stamping operation. Addressing the issue requires first understanding why the slugs are pulling. What Is Slug Pulling? When a pierce punch creates a hole, it also produces scrap, usually referred to as a slug. Slug pulling occurs when the slug sticks to the...

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Solving punch breakage problems

December 12, 2006

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This series of articles investigates the many causes of premature punch breakage in stamping operations.

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Designing dies 2-D or 3-D?

November 7, 2006

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Both 2-D and 3-D die design packages have advantages and disadvantages, which are discussed here, but true success lies in the designer's ability, not the software's.

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Setting up progressive dies - Part II

October 10, 2006

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

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Die Basics 101: Part X

October 10, 2006

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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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Die Basics 101

October 10, 2006

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

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Setting up progressive dies - Part I

October 3, 2006

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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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Unique forming short cuts

August 8, 2006

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Die designers often are faced with how to make a part feature that is unique and possibly difficut to form. Short cuts are discussed for twisting a part, creating a return flange, and making a 90-degree bend.

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Die basics 101 starts with eight basic components

August 8, 2006

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A stamping die is a special, one-of-a-kind precision tool that cuts and forms sheet metal into a desired shape or profile. Most dies are constructed of several basic components, including die plates, shoes, die sets, guide pins, bushings, heel blocks, heel plates, screws, dowels, and keys. Dies also need stripper, pressure, and drawing pads, as well as the devices used to secure them—spools, shoulder bolts, keepers, and retainers; and gas, coil, or urethane springs.

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Die Basics 101: Part IX

August 8, 2006

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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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The process of fineblanking

July 11, 2006

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Fineblanking can achieve flatness and cut edge characteristics that are unobtainable by conventional stamping and punching methods. Fineblanking is described in relation to conventional methods to encourage a better understanding of its benefits and limitations.

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