April 11, 2006 | By Art Hedrick
Previous articles in this series focused on stamping dies and production methods. This article discusses stamping materials—both ferrous and nonferrous.To process, design, and build a successful stamping die, it is necessary to fully understand the behavioral characteristics of the specific...
February 7, 2006 | By Art Hedrick
Previous articles in this series discussed common stamping die components. This article focuses on less common specialty components found only in certain dies, most of which are available from various suppliers.Figure 1Inidie Tapping UnitsImage courtesy of Danly IEM.In-die Tapping UnitsMany dies...
December 13, 2005 | By Art Hedrick
Many specialty components can be used in dies, but the most commonly used are die plates, shoes, die sets, guide pins, bushings, heel blocks, heel plates, screws, dowels, and keys—all of which were explained in Part IV of this series. This article focuses on other common components—pads,...
November 8, 2005 | By Art Hedrick
Unnecessary die repair stems from several basic shortcomings, namely poor die design, setup procedures, tool design, and maintenance techniques.
October 11, 2005 | By Art Hedrick
Stamping dies can comprise many components. This article discusses the basic components, including die plates, shoes, die sets, guide pins, bushings, heel blocks, heel plates, screws, dowels, and keys. This article is one of a 16-part series on the fundamentals of stamping. Descriptions of all the articles in this series, and links to them, can be found at the end of this article.
August 9, 2005 | By Art Hedrick
Many factors come into play when choosing a production method for stamping. This article discusses and explains the advantages and disadvantages of line dies, transfer dies, and progressive dies. This article is one of a 16-part series on the fundamentals of stamping. Descriptions of all the articles in this series, and links to them, can be found at the end of this article.
June 14, 2005 | By Art Hedrick
Figure 1EmbossingAll forming operations deform sheet material by exposing it to tension, compression, or both. Most part defects, such as splits and wrinkles, occur in forming operations. Successful sheet metal forming relies heavily on the metal's mechanical properties. The metal being formed must...
April 11, 2005 | By Art Hedrick
This article is one of a 16-part series on the fundamentals of stamping. Descriptions of all the articles in this series, and links to them, can be found at the end of this article.
February 8, 2005 | By Art Hedrick
Figure 1Having a pierce or perforating punch chip, or worse yet break, can cause severe die damage. It also can result in nonconforming parts because of burrs or undersize holes. Broken punch pieces can fall into the die and crush pads, as well as forming and cutting sections. This article...
January 11, 2005 | By Art Hedrick
Figure 1Even if the scoring is the reason for the split, that doesn't mean that resolving the galling issue will ensure a robust process.I recently had the chance to engage in some very interesting conversation with the head of the sheet metal formability lab for a very large automotive stamper....
December 7, 2004 | By Art Hedrick
How do you choose a store-bought cam for your stamping operation? Hundreds of cam designs are available today from numerous suppliers. Choosing the one that best fits your needs, as well as your budget, sometimes can be very confusing.
December 7, 2004 | By Art Hedrick
Of all the geometric tolerances that are difficult to achieve, flatness is one of the hardest. Most stampers probably would much rather try to make a complex-shaped, thin, high-strength steel deep-drawn part than hold a small-tolerance part requiring a tight flatness.Achieving part flatness is a...
November 9, 2004 | By Art Hedrick
As a consultant and educator, I travel to numerous die shops and stamping plants, and almost all of them have the same basic request:"Can you show these tooling guys how to make the dies run better?"I hear comments like "We sure have a lot of downtime and scrap, not to mention the usual problems...
October 12, 2004 | By Art Hedrick
Establishing a good buying procedure is a critical aspect of the tool purchasing process. All too often tool supplier expectations are not communicated and executed effectively. Miscommunication can cause you to purchase a die that doesn't produce good parts, needs constant attention, wears out prematurely, or has other problems.
August 10, 2004 | By Art Hedrick
Figure 1Poor cutting section designCutting problems, such as die sections breaking, slugs jamming and pulling, and burrs, are common stamping challenges. Many of these problems are caused by poor die design. Others are caused by poor maintenance techniques, improper setup, and poor scrap...