History of CNC machining

On 九月 24th, 2014, posted in: CNC Precision products by 0 Comment
CNC is short for Computer Numerical Control. It’s a method used in modern machining to perform a wide range of associated tasks. it is used in both large metalworking fabrication applications and by thousands of home hobby enthusiasts.

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CNC machining involves the Cartesian coordinate system. In algebra, an X-Y plane with coordinates is common. These are two number lines, called axes, intersecting at right angles. The horizontal line is labeled X, and the vertical line is labeled Y. The coordinates of a point is always given in an (X,Y) format. For example (2,5) means you travel 2 spaces on the X axis, and 5 spaces up the Y axis. In advanced algebra, an X-Y-Z space is defined with the introduction of a third axis at a right angle from the X-Y plane. The written format is the same, except that Z is the
third axis. For example (2,5,8) means you travel 2 spaces on the X axis,5 spaces on the Y axis, and 8 spaces up from the X-Y plane on the Z
axis. CNC uses this X-Y-Z premise when defining tool paths. The programmer tells the spinning cutting tool to travel to a point, such as
(3,5,6).

Before the invention of CNC machining, metalworking fabrication was performed by NC (numerical controlled) machines. These machines were designed and developed in the late 1940s and early 1950s by John T. Parsons, who worked in collaboration with MIT. The work being conducted by Parsons and MIT was commissioned by the U.S. Air Force as a means to develop a more cost-effective way to manufacture aircraft parts featuring complex curved geometries. Over the course of the decade, NC machining became the industry standard.

In 1967, the concept of computer-controlled machining began to circulate. In 1972, major developments in the evolution of CNC machining
began to take place, with the implementation of CAD (Computer Aided Design) and CAM (Computer Aided Machining). In 1976, the first 3D
CAD/CAM systems were introduced and by 1989, the CNC machines became recognized as the industry standard.

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