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Tag selected: radius.
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Saved by uncleflo on August 13th, 2019.
For those who need a tighter bend radius we have designed the Useful-Tools hand operated mandrel tube bender. These machines will allow tubes to be bent with an impressive 2 times tube diameter bend radius with no rippling or cracking of the tube and the absolute minimum of distortion. We have 2 machines that all operate on the same principle, namely the pipe or tube to be bent is located between a formed mandrel and back plate with another formed internal mandrel (bullet) held at a carefully controlled position inside the tube. The tube is secured firmly to the main mandrel and when the mandrel is turned the tube is pulled over the internal mandrel as it wraps around the main mandrel. (This internal "Bullet" holds the tube open and helps reduce distortion to a minimum.)
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Saved by uncleflo on April 4th, 2015.
These notes relate to the stresses and strains existing in thick walled cylinders when subject to internal and external pressures. The notes include the analysis of two or more cylindrical parts, assembled by press fitting or shrinking, resulting in an interference fit between the parts. The equations resulting enable estimates of the forces need to assemble and separate the parts and the maximum torque which can be transmitted by the assembly. Members of excelcalcs.com can upload a spreadsheet including all of the derived equations below at ExcelCalcs.com calculation Thick cylinders
engineering study strength stress cylinder part torque assembly member equation calculation thick wall pressure internal break radius mechanical property structure
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