Dieology LLC

Art Hedrick

Contributing Writer
Dieology LLC
8730 10 Mile Rd. SE.
Rockford, MI 49341


Phone: 616-894-6855
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.
Die part hard marks image

Reading progressive die strips — Part II

June 1, 2008

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Looking at the results of a process—in this case, the strip produced in the die—certainly can lead to good data indicating the root cause of a problem. This Part II of a two-part series discusses hard marks, poor die design, and coil-related problems.

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Progressive die strips

Reading progressive die strips — Part I

May 1, 2008

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Looking at the results of a process—in this case, the strip produced in the die—certainly can lead to good data indicating the root cause of a problem. Distorted, elongated pilot holes, mismatched cuts are common defects. Distorted pilot holes can be the result of a poor carrier design. An improperly set up feed release can cause misfeeds, pilot hole elongation, and bent, broken, or galled pilots, as well as poor part location and gauging.

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Cold Forming Tooling Diagram

Getting the most from your cutting punches: Part II

April 29, 2008

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Many factors influence tool steel selection. Part Iof this article focused on selecting the right cutting clearance. Part II discusses properties to look for in tool steel and the importance of heat treating, preparation for production, coatings, lubricants, and the press on which the tool...

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Extrusion die design

Successful Extruding: Part II

April 15, 2008

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Die design and building is a critical part of a successful extrusion process. ironing—vertically squeezing the metal between the punch and the die to increase the surface area—helps refine the extruding process, as does preforming.

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Successful Extruding: Part I

March 15, 2008

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Extrusion is the process in which a continuous radial stretch flange is created by expanding a hole. Of all of the factors controlling the success of an extruding operation, material type and its mechanical properties are the most influential. Materials exhibiting good stretch capability and stretch distribution characteristics are best suited for extruding.

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Die cutting diagram figure 1

Getting the most from your cutting punches: Part I

February 12, 2008

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Selecting the right cutting clearance and tool for an application is among the challenges stampers face. Material properties and other factors influence this decision. Following some basic guidelines presented in this article can help you select or design the best tool for your needs.

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Transfer die rails

Stamping 101: Die basics

January 15, 2008

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This article introduces beginning toolmakers, die maintenance technicians, engineers, and press technicians to tool and die components and their functions

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Why is it Dieology, not Dieologism?

December 11, 2007

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Successful dieworkers are very methodical and data-driven in the way they approach a problem. They carefully study each problem, determine its root cause, and take both short- and long-term corrective action.

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Die Drawing process

Die Basics 101: Part XVII

December 11, 2007

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Part XVI of this series wrapped up the discussion of bending in stamping operations. This article focuses on drawing. What Is Drawing? Drawing is a metal forming process in which a product is made by controlling sheet metal flow into a cavity and over a punch. The process of deep drawing means...

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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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Rotary rocker benders

Die Basics 101: Part XVI

October 9, 2007

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Part XV of this series described several bending methods—wipe, coin, relief, pivot, and V. It also discussed springback and how to compensate for it when using these methods. This article focuses on other bending processes. Keep in mind that the key to success is to design the bending process so...

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Adhesive Galling

Finding, addressing the root cause of die galling failures

October 9, 2007

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There is no best tool steel type, coating, or way of keeping the punches from breaking. The best solution for each of these problems can be found by collecting specific data with respect to why each of the problems occurs

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Deep draw part

Stamping aluminum

September 11, 2007

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The reality is that aluminum is not steel. It doesn't behave like steel, it doesn't flow like steel, and it certainly doesn't stretch like steel. So does this make aluminum hard to form? No, not if you think like aluminum.

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Springback diagram

Die Basics 101: Part XV

August 8, 2007

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Part II of this series presented a basic overview of metal forming operations, such as bending, flanging, drawing, ironing, coining, curling, hemming, and embossing. This and future installments discuss these operations in more detail. We will look at factors controlling the success of each...

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Tool steel diagram

Cutting tooling costs: Part II

August 1, 2007

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To stay competitive in today’s market, stampers must build dies from materials that adequately perform with as little maintenance as possible. Appropriate tool steels can be cold-rolled steel to solid carbide. The key is to know when to use a lower-grade steel and when to use a higher-grade tool steel.

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