Robert C. Peckham, P.E.
PRODUCTS AND EQUIPMENT - RECONSTRUCTION AND FAILURE ANALYSIS
As a mechanical engineer, I have worked on cases involving various
machines and machinery including, for example, cranes (tipover, cable failure,
structural failure, etc.), presses and brakes (hand operated to hundreds of
tons), injection molding machines (small bench to hundreds of tons), rubber
extruders and calendaring rolls, laminating machines, ribbon blenders, screw
conveyors, roller and belt conveyors, as well as gravity and air material
feed/conveyor systems, grinders, oil field rigs, piping and equipment,
slitters, printing presses, box folding/assembling machines, routing machines,
industrial sanders (to 60"), blow molders, bottle trimmers, electric hoists,
earth drills (stability, structural failure), elevators (controls, cables,
safety devices), dairy equipment, chairs (various structural and dynamic
problems), ladders (structural and dynamic problems), refrigeration system
compressors and piping, pumps (turbine, peristatic, piston) pumping various
fluids such as air, freon, blood, gasoline, ammonia, water, etc. as well as
general structural failure of parts of machinery and equipment, and, of
course, cases involving guards, interlocks and lockout stations.
General failure types on cases I have worked on have included, for
example, simple overload, fatigue, poorly manufactured sheet metal, poor
quality castings, degraded parts due to incorrect machining/fabrication,
material damage due to finishing processes (i.e. hydrogen embrittlement,
etc.), structural failure due to corrosion (both anticipated and
unanticipated). Unfortunately many chain and wire rope ("cable") failures
are caused by poor rigging, or incorrect use, rather than an actual problem
with the chain or wire rope.
Our library contains many ANSI, UL, OSHA, CFR, ISO, etc. standards
and regulations.
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