ASMA LLC

Steve Benson

President
ASMA LLC
2952 Doaks Ferry Road N.W.
Salem, OR 97301-4468


Phone: 503-399-7514
fax: 503-399-7514
www.asmachronicle.com
Contact via email
Steve Benson, a member and former chair of FMA's Precision Sheet Metal Technology Council, is the president of Asma LLC.

Press brake basics: 10 tips for bottom bending aluminum

January 27, 2016

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Bottom bending can work well for some aluminum grades, but it requires knowledgeable operators who fully

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Grand unifying theory of press brake bending: Part IV

December 15, 2015

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This month Steve Benson summarizes his grand unifying theory of radius, bend deduction, and die selection with a review and complete rundown of the bend calculations, from estimating springback to working the bend functions.

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A grand unifying theory of press brake bending: Part III

November 11, 2015

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In this installment of the Grand Unifying Theory of bending, press brake guru Steve Benson describes bending calculations for aircraft tooling. He also covers the basics of bottoming

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A grand unifying theory of press brake bending: Part II

October 28, 2015

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Radius bends—defined here as any bend with an inside radius greater than 125 percent of the material thickness—require careful calculation, not only because of their significant springback, but also because of the tooling these bends require. This includes the use of relieved dies.

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A grand unifying theory of bending on the press brake: Part I

September 8, 2015

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Press brake guru Steve Benson proposes a new theory of bending, altering some long-held labels and definitions and introducing new formulas. Those long-held definitions worked well, but these new definitions and formulas may help a press brake technician become even more accurate in predicting how a part will form.

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Predicting the inside radius when bending with the press brake

August 12, 2015

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You can use some common rules of thumb to predict the inside bend radius when air forming, and the results you get are usually close enough, but with the help of a few online calculators, you can get even closer.

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How to calculate the air-formed radius of different bend angles

July 21, 2015

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Using the 20 percent rule works well when calculating the floated radius in an air form, but what about the radius at different bend angles? To calculate this, we start with geometry to find the arc length and radius at different bend angles. We then manipulate these results by factoring in real-world bending conditions.

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Forming aluminum on the press brake: Bending soft, not sharp

June 29, 2015

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Air bending soft aluminum has such a low tensile strength that it doesn't take much for a narrow punch tip to penetrate the surface and turn the bend sharp.

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The 4 pillars of press brake tonnage limits

May 3, 2015

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To ensure you always work within the tonnage limits of your press brake and tooling, first calculate how much tonnage you need. Second, identify your tooling’s load limits. Third, calculate the sinking tonnage limit, which, if exceeded, can embed tooling into the ram or bed. Fourth, determine your press brakes’ centerline load limit.

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How an air bend turns sharp

April 30, 2015

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Why do air bends in cold-rolled steel turn sharp at an inside radius that’s about 63 percent the material thickness? It has to do with the relationship between forming forces and a material’s tensile and yield strength.

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Minimum versus recommended inside bend radius

April 1, 2015

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A material’s minimum inside bend radius shows the smallest radius that’s physically possible in an air bend, though your machines and tooling may not be able to handle the tonnage. The recommended inside bend radius, such as those found on bend allowance charts for air bends, shows you what’s optimal in typical applications

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Why buy new tooling for a sheet metal hand brake?

February 17, 2015

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When bending with a hand brake, you can use the tooling that came with the machine, but investing in a tool with a radius on the punch nose has its benefits.

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Bending Basics: 6 steps to successful die selection for press brakes

February 16, 2015

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Choosing the right die for an application hinges on the tooling and press brakes you have, and the tonnage limitations of both.

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Bending Basics: The hows and whys of springback and springforward

July 9, 2014

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Why exactly does springback occur, and how can a technician predict it? Press brake guru Steve Benson covers the basic factors.

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Bending Basics: Strategies for forming offsets

May 12, 2014

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If you pick the right offset tool for the job, you'll find you will be able to produce many different offset geometries quickly and safely.

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