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

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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