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Date:  5-10-2020
Number of Hours:  8.00
Manual Reference:  
Brief Description:  Built High load Press Brake

As part of building the spar, I will need to bend the landing gear brackets. These are about 7 inches long and are made from 0.125 Steel. Too thick fo a bending brake, and a good excuse to get a high capacity press brake. However, I did not want to pay full price for one, so I found a brake that came as a kit that I had to weld together. Image one shows the completed project. The forms that the press blade moves agains are steel rods. The inboard rods are 1 inch diameter, and the outer rods are 1.5 inches. When I first did a test part against the 1 inch steel rods, they bend and formed curved parts. As a result, I straightened the rods and built the fixture shown in the second picture. It has a blade on the bottom to increase the section inertia and distributes the load closer to the support points (so it does not bend in any significant way) Also, cut a section of tubing with 0.50 outer diameter and attached it to the press blade. The result of these modifications is a brake that forms a perfect 0.25 inch radius with perfectly straight flange legs.
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Minni Press Brake as Built

Minni Press Brake as Built

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Press Brake Die with stiffeners

Press Brake Die with stiffeners

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Perfect bends resulting from new tool

Perfect bends resulting from new tool

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