My Simple Note Chapter 2 : CNC MACHINE TOOL CONSTRUCTION

Machine Tool Structure

• The understanding of machine depend on various element that perform part of machine

• Heavy structure- provide ribs at strategic location to increase static stiffness

• Layout such structure it is called 'open' or 'C- frame'

•  A machine tool bed (cast iron) is a structure that carries and  

         accommodate all  other machine

• Recently use of concrete as bed material is grinding ground

Guide ways Technology 

The necessary features of guide ways are:

1. Ability to meet accurancy requirement
2. Easy to assembly
3. Economy in manufacture
4. Accessibility for effective lubricant
5. Wear resistance, durability and lubricant
6. proper contact an over the sliding area

Guide way is classified to

a) sliding friction

b) rolling friction

c)externally pressurized

Slide Way of  CNC

MACHINE TOOL SPINDLE

The main function:

• Centering job or tool
• Holding the job or the tool
• Rotating the job or the tool

During machining the force is directly transmitted to the spindle as axial and radial force