CHAPTER - 2
NUMERICAL CONTROLLED (NC) CONVENTIONAL MACHINING
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, Development of Machine Tools
• Began during stone age (<50,000 years ago)
• Hand tools of wood, animal bones, or stone
• Bronze age (4500 to 4000 b.c.)
• Copper and bronze implements
• Power-operated (animal power)
• Iron age (1000 b.c.)
• Iron replaced bronze
• Domesticated animals provided power
• Commodities handmade by skilled craftspeople
• Machine age (~300 years ago)
• Explored new sources of energy (water)
Email: Machine Tools
, Development of Machine Tools – Cont.
• Industrial age began when James Watt produced first steam engine (1776)
• Steam engine provided power to other areas
• Machines improved
• Steam/steel in ships, railroads, steam tractors
• New power – electricity produced by generators
• Diesel and gasoline engines
• Progress continued slowly during first part of 20th century
• Spurts during the two world wars
• Since 1950s, rapid progress
• Now in space age
• Atom harnessed: nuclear power
• Journey to moon and outer space
Email: Machine Tools
NUMERICAL CONTROLLED (NC) CONVENTIONAL MACHINING
Email:
, Development of Machine Tools
• Began during stone age (<50,000 years ago)
• Hand tools of wood, animal bones, or stone
• Bronze age (4500 to 4000 b.c.)
• Copper and bronze implements
• Power-operated (animal power)
• Iron age (1000 b.c.)
• Iron replaced bronze
• Domesticated animals provided power
• Commodities handmade by skilled craftspeople
• Machine age (~300 years ago)
• Explored new sources of energy (water)
Email: Machine Tools
, Development of Machine Tools – Cont.
• Industrial age began when James Watt produced first steam engine (1776)
• Steam engine provided power to other areas
• Machines improved
• Steam/steel in ships, railroads, steam tractors
• New power – electricity produced by generators
• Diesel and gasoline engines
• Progress continued slowly during first part of 20th century
• Spurts during the two world wars
• Since 1950s, rapid progress
• Now in space age
• Atom harnessed: nuclear power
• Journey to moon and outer space
Email: Machine Tools
