The term numerical control is a widely accepted and
commonly used term in the machine tool industry. Numerical control (NC)
enables an operator to communicate with machine tools through a series
of numbers and symbols.
NC which quickly became
Computer Numerical Control (CNC) has brought tremendous changes to the
metalworking industry. New machine tools in CNC have enabled industry to
consistently produce parts to accuracies undreamed of only a few years
ago. The same part can be reproduced to the same degree of accuracy any
number of times if the CNC program has been properly prepared and the
computer properly programmed. The operating commands which control the
machine tool are executed automatically with amazing speed, accuracy,
efficiency, and repeatability.
The ever-increasing
use of CNC in industry has created a need for personnel who are
knowledgeable about and capable of preparing the programs which guide
the machine tools to produce parts to the required shape and accuracy.
With this in mind, the authors have prepared this textbook to take the
mystery out of CNC – to put it into a logical sequence and express it in
simple language that everyone can understand.
Milling Machine
The milling machine has always been one of the most versatile machine tools used in industry (Fig.
5). Operations such as milling, contouring, gear
cutting, drilling, boring, and reaming are only a few of the many
operations which can be performed on a milling machine. The milling
machine can be programmed on three axes:
• The X axis controls the table movement left or right.
• The Y axis controls the table movement toward or away from the column.
• The Z axis controls the vertical (up or down) movement of the knee or spindle.
The main axes of a vertical machining center.
No comments:
Post a Comment