evolution of machine tools

Machining with Manual Application of Power

Evolution of Machine Tools


First Milestone: Application of Power

Maudsley’s Screw Cutting Machine is second milestone in machine tools in which spindle and tool

motion were synchronized


Copying arrangement for Machining is third milestone in automation in which hard templates/masters were used

to machine components.


Copying Lathe


In-process gauging is a fourth milestone



• CNC or Computer Numerical Control is a term

derived from NC or Numerical Control.

• NC refers to Control of a process or automatic operation of a machine by using symbolic codes consisting of characters and numbers.

• NC was introduced in late 40’s to control machine tools such as Drilling and Milling machines. One of the first applications of NC machine tool was in production of helicopter rotor blades and ship propellers.

John T Parsons introduced NCmachine tools for which he wasawarded a patent titled motorControlled apparatus for positioning machine tool control (patent No: 2820187)

• Computer Numerical Control (CNC) is a term derived from NC or Numerical Control in 70s when micro-processor and computer based NC controlled machines were built.


Evolution of CNC Technology Tools

First Application

Initiative of US Air Force

Opposition

NC to CNC

APT

CAM

Feature Based Machining

STEP NC

evolution of machine tools

Documents

ncmachine tools

machiningstep nc

computer numerical control

nc controlled machines

tool motion

process gauging

milling machines

motorcontrolled apparatus