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Material Selection For a Camming Head

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. Fill width of crack Prevent slippage of device when loaded

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Material Selection For a Camming Head

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

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

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

  4. Constraints For Material Selection • High Fracture toughness • High Strength to weight ratio • Ductile • Formable • Maneuverable

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

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

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

  8. Resulting Aluminum Alloy • Fracture Tough • Strong and light • Ductile • Formable

  9. Alternative 7075-T6 • Lower Fracture Toughness • Higher Strength Weight Ratio • Harder Surface-Less Wear

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

  11. References • http://Web.mit.edu/custer/www/ rocking/cams/cam.html • http://www.matweb.com • http://elvis.engr.wisc.edu/uer/uer96/ author2/content.html • Van Vlack, Lawrence H., Elements of Materials Science and Engineering, fourth edition, Addison-Wesley Publishing, 1980. • Flinn, Richard A. and Trojan, Paul K., Engineering Materials and Their Applications, Houghton Mifflin, Boston, 1975. • DeGarmo, E. Paul, Black, J. Temple and Kohser, Ronald A., Materials and Processes in Manufacturing, Macmillian Publishing, 1988.

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