March 6, 2015 | By Art Hedrick
In Part I of this article, which appeared in the January/February 2015 issue, I discussed the first two basic steps in troubleshooting: Identify problems with the part and verify the die and press setup parameters. Following are the remaining seven steps in the process. Step 3—Reassess and...
May 10, 2011 | By Art Hedrick
It is almost unrealistic to expect some stamped part part features, such as hole position and flatness, to remain within a small tolerancing zone.
March 11, 2011 | By Art Hedrick
The forms and positional tolerances called out on product designs often defy the physical abilities of the product's material. Proper product and process design, as well as pressure clamping, can help maintain strict tolerances.
December 13, 2010 | By Art Hedrick
This article continues the discussion of deep-drawing and stretching variables begun in Part I by describing friction, thermal expansion, metal topography, and forming speeds and how they affect metal forming operations.
October 21, 2010 | By Art Hedrick
Ever wonder why one out of every 500 or so of your deep-drawn or stretched parts splits? Why you can’t make a part consistently? The answer lies in the variables of these operations—variables all metal formers must deal with.
August 9, 2010 | By Art Hedrick
Just what is involved in die building? Whether you are a die builder or a stamping company that uses dies, this overview can help you understand the many steps required to take a die from concept to production.
June 16, 2010 | By Art Hedrick
What is deep drawing? What part parameters require the process? What must you consider when designing a deep-drawn part, and when should you consider an alternate process, such as spinning?
April 13, 2010 | By Art Hedrick
When designing a part, you must decide which is the best way to form it. Should you draw it or stretch it? That depends on several factors, including forming depth.
March 9, 2010 | By Art Hedrick
Oil canning cannot be cured by coining, beating, or reshaping the metal. Instead, it must be prevented by ensuring the sidewalls are not subjected to radial compression.
February 9, 2010 | By Art Hedrick
In his first installment of DIEVESTIGATION, a new column about using research and data to solve stamping problems, tool and die expert Art Hedrick discusses how the metal specified during part design affects downstream operations and costs. What should you consider when selecting the metal?
December 15, 2009 | By Art Hedrick
How are bending, flanging, coining, embossing, stretching, curling, hemming, ironing, necking, and drawing related? They all are common metal forming operations. Find out more about these processes in this final installment of stamping expert Art Hedrick's sheet metal stamping series.
December 15, 2009 | By Art Hedrick
Editor's Note: This series presents an overview of metal stamping. Part I focuses on the various careers in the metal stamping industry. Part II discusses stamping materials and equipment. Part III focuses on dies and cutting and Part IV offers more detail about cutting processes. Part V, the final installment, investigates forming methods.
October 27, 2009 | By Art Hedrick
Continuing his series about sheet metal stamping, tool-and-die expert Art Hedrick explains common cutting operations used in stamping: trimming, piercing, blanking, notching, shearing, lancing, and pinch trimming. Find out how they work and which applications are appropriate for each.
August 25, 2009 | By Art Hedrick
Continuing his series about sheet metal stamping, tool-and-die expert Art Hedrick focuses on die basics, including die materials and rudimentary maintenance. He also explains the cutting process and what happens to metal when you cut it with a stamping die.
August 1, 2009 | By Art Hedrick
It seems like every time there is a problem making a good part, the steel is blamed. Often the root problem is the process used to cut and form the steel — the combination of the die, the press, and the lubricant.