INGLESE MECCANICA
materials
metals
polimers
energy sources
engines
ceramics
composites
smart materials
Automation
physical and chemical properties
physical properties
engine is different from motor because it use heat
heat engine
convert thermal energy into mechanical energy
melting point
thermal conductivity
thermal expansion
electrical conductivity
chemical properties
internal combustion
external combustion
corrosion resistance
better than E.C.
composed by
mechanical properties
strength
camshaft
spark plug
cilinder
timing belt
valves
hardness
elasticity
plasticity
stiffness
toughness
brittleness
fatigue
piston
connecting rod
ferrous metals
crankshaft
can be
diesel
petrol
ferrous alloys
4 stroke
2 stroke
intake
compression
power
exhaust
iron
cast iron
steel
4 stroke every 4π
non-ferrous metals
non-ferrous alloys
aluminium
top dead centre = punto morto superiore
copper
tin
lead
zinc
upstroke
downstroke
2 stroke every 2π
bronze
more rugged than petrol but explosion not controlled, highter compression rate than petrol
brass
thermoplastics
it doesn't have spark plug but has injector
thermosetting plastics
for heavy duty application
PVC
Nylon
polyester
polyethylene
has many systems
fuel system
oil system
cooling system
bakelite
starting system (battery)
formica
polyester resins
exhaust system
integrate machines and control systems
shape memory alloys (SMAs)
different from mechanic because of the self-controlling system
piezoelettrico materials
used for
material handling
processing
assembly
inspecting
composed of silicon, carbide and other synthetic elements
born during the first industrial revolution (1750)
are made of two or more different materials that became stronger where combined. glass and carbon fibre the most used
automation in industry
CAD
CAM
CIM
CAD/CAM
coordinate the action of all the single workstation and oversee the overall performance
CNC machines
types
use of the computer systems to assist in the planning and the management of the operation to realize an object
thermal
radiant
kinetic
electrical
chemical
nuclear
gravitational
main technology to product design in 2 or 3 dimension
uses the CAM and CAD systems jointly, can transform data from a drawing into machining instructions
renewable energy sources
are the one that can be easily replaced by natural ecological cycles. are found directly in nature. they don't cause pollution
definition
the energy is the ability to do work or produce physical changes
\
non-renewable energy sources
uses control programs made by CAD/CAM
solar energy
provide
coordinate for the cutting tool
specifics like speed
geothermal energy
wind energy
biomass
hydropower energy
quality checks
Pros
types
CNC laser cutter
CNC EDM
CNC mills,lathe,grinders
CNC waterjet cutters
Cons
are the ones that cannot be easily repleced. are responsible for pollution and global warming
petroleum
crude oil
coal
natural gas
nuclear energy
collects the energy of the sun. using collector panels to create conditions that cane be turned into power
more efficient than humans
more precise
less expensive
hight initial cost
much time to create programs
works by using turbines to make power. turbine is a machine with uses air, gas, water to turn a wheel and produce power
is the extraction of energy stored in the earth. how rocks below the earth heat up the water, which produces steam that is captured to move turbines
is produced from organic material
the power of the water is used to turn generators to produce electricity
fossil fuels
non-fossil fuels
crude oil
natural gas
coal
uranium