group 2 – progress report.ppt

Group 2 – Progress Report 2/23/09 Purpose (Justin) Talk about progress the past week Fabrication of shaft Shaft exercise Lessons learned Getting ahead of schedule Gantt Chart (Justin) (Switch to Excel) Stiffness Calculation (Corey) Spindle Shaft Dimensions (Corey) Stiffness Calculation (Corey) Length (in) Length (m) Diameter (in) Diameter (m) Area Momentof Inertia Ks 1 0.0254 0.5 0.0127 1.27698E-09 4.68E+07 4 0.1016 1.05 0.02667 2.48349E-08 1.42E+07 0.87 0.022098 0.89 0.022606 1.28193E-08 7.13E+08 0.63 0.016002 0.591 0.0150114 2.49261E-09 3.65E+08 ? ? ? ? ? ? YoungsModulus (Pa) ? Keq (N/m) ? Keq(N/mE-6) ? 2.00E+11 ?6 ? 10.4260596 ? Keq=10.426 N/μm Pre-process Plan (Yi Fei) Face-off right most face Drill live center Rough cut section A, B, C, and then D Finish cut section A, B, C, and then D Cut part to length, take part out D C B A Process Plan (Yi Fei) Face-off right most face Drill live center Turn down whole length to 1.07” diameter Rough cut and finish cut section C, B, and then A Take part out, cut to length, turn part around Rough cut and finish cut section D D C B A Manufacturing (Mark) Details Manufacturing (Mark) Manufacturing (Mark) Test Cut Results (Corey) Cantilevered Cuts Diameter (mm) Mean (mm) 1 27.73 2 27.88 27.91 3 27.71 4 27.74 ? ? 5 27.76 ? ? 6 28.03 Std Dev 7 28.06 8 28.06 0.16 9 28.14 10 27.99 ? ? ? ? ? ? Free End Cuts Diameter (mm) Mean (mm) 1 27.73 2 27.56 27.685 3 27.74 4 27.71 Std Dev ? ? ? ? 0.08 Exposed Length (mm) 138.11 The measured diameters were greater than the target diameter The largest diameters were measured from the cantilevered cuts ~.003 error in touching off tool Free end cuts were performed last Initial Diamter (mm) 28.575 Target Diameter (mm) 27.305 Fabricated Shaft (Corey) (Non) Systematic Errors (John) CTE=12.2 μm/m-°C ?L~1 μm From Manufacturing Engineering and Technology - Kilpakjian Nonsystematic Errors - Thermal Non-Systematic Errors: Vibration Rotating machinery may excite natural frequencies of lat