Material Selection For a Camming Head Project Participants Scott Eaton Diane Maguire Don Bragg Eric Newberg Dan Brooks Jared Record Peter Gilbert Jeremy.

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Presentation transcript:

Material Selection For a Camming Head Project Participants Scott Eaton Diane Maguire Don Bragg Eric Newberg Dan Brooks Jared Record Peter Gilbert Jeremy Ouellette

Camming Head Objective n Fill width of crack n Prevent slippage of device when loaded n Hold Fixed Under falling situation Dynamic Load of 13KN

Camming Head Function n Maximize Frictional Forces By Optimizing Head Shape n Maximize Working Surface Area n Maximize grip of Head to Rock

Constraints For Material Selection n High Fracture toughness n High Strength to weight ratio n Ductile n Formable n Maneuverable

Aluminum 6061-T6 n 6000’s Main Components of Magnesium and Silicon n T6 Temper Designation That Solution Is Heat Treated and Artificially Aged

Heat Treatment n Magnesium and Silicon are dissolved forming a “Solid- Solution” n Elements fuse to become an alloy.

Artificial Aging n Strengthening Mechanism Equivalent to Precipitation Hardening n Precipitate Will form around grain structure leading to fewer slip planes

Resulting Aluminum Alloy n Fracture Tough n Strong and light n Ductile n Formable

Alternative 7075-T6 n Lower Fracture Toughness n Higher Strength Weight Ratio n Harder Surface-Less Wear

Why 6061-T6 Aluminum n Softness Advisable n Experimentally better against slippage n More Ductile less chance of blowout

References n rocking/cams/cam.html n n author2/content.html n Van Vlack, Lawrence H., Elements of Materials Science and Engineering, fourth edition, Addison-Wesley Publishing, n Flinn, Richard A. and Trojan, Paul K., Engineering Materials and Their Applications, Houghton Mifflin, Boston, n DeGarmo, E. Paul, Black, J. Temple and Kohser, Ronald A., Materials and Processes in Manufacturing, Macmillian Publishing, 1988.