Drill bit life calculation
8
DRILL BIT FATIGUE LIFE ESTIMATE FEA SIMULATION REV A 12/11/17 D. BLANCHET 3B ASSOCIATES 23 ROCKY HILL RD. BURLINGTON, MA 01803 781-272-7057 [email protected] PREPARED FOR: I. TIMOSHENKO 0.375 DIA TOOL STEEL
-
Upload
don-blanchet -
Category
Engineering
-
view
71 -
download
1
Transcript of Drill bit life calculation
DRILL BIT FATIGUE LIFE ESTIMATEFEA SIMULATION
REV A 12/11/17
D. BLANCHET
3B ASSOCIATES
23 ROCKY HILL RD.
BURLINGTON, MA 01803
781-272-7057
PREPARED FOR: I. TIMOSHENKO
0.375 DIA TOOL STEEL
SOLIDWORKS MODEL INCLUDING SMALL DEFECT
FEA REFINED MESH – 4 ADAPTIVE STEPSNEAR EXPECTED STRESS CONCENTRATIONS
APPLIED BOUNDARY CONDITIONS
Fixed in chuck
Side loading components
From cutting
Reaction forces
STATIC STRESS ANALYSIS – MAX BELOW FRACTUREMISALIGNMENT “WOBBLE” 0.0035 INCH
DRILL WOBBLE .0035CAUSE OF ALTERNATING
TENSILE AND COMPRESSIVE
STRESSES – INDUCINGFATIGUE FAILURE
FATIGUE LIFE S-N CURVE
FATIGUE LIFEESTIMATEFROM FEA
AT 800 RPM
1.6E04/800 =20 MINUTES