Recent Content on for ASMA LLC

November 11, 2015
A grand unifying theory of press brake bending: Part III
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
October 28, 2015
A grand unifying theory of press brake bending: Part II
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.
September 8, 2015
A grand unifying theory of bending on the press brake: Part I
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.
August 12, 2015
Predicting the inside radius when bending with the press brake
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.
July 21, 2015
How to calculate the air-formed radius of different bend angles
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.
June 29, 2015
Forming aluminum on the press brake: Bending soft, not sharp
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.
June 1, 2015
Precision sheet metal bending, bump by bump
Bump bending remains more art than science, especially for large and thick workpieces, but using the right tools and setup procedures help make this challenging brake operation much more efficient.
May 12, 2015
6 pasos para seleccionar exitosamente dados para prensas dobladoras
Elegir el dado correcto para una aplicación depende del herramental y de la prensa dobladora que usted tenga, y de las limitaciones de tonelaje de ambos.
May 3, 2015
The 4 pillars of press brake tonnage limits
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.
April 30, 2015
How an air bend turns sharp
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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