Classification of Machine Tools:-

 Classification of Machine tools:-

Number of types of machine tools gradually
increased till mid 20th century and after that started decreasing based on
Group Technology. However, machine tools are broadly classified as follows:

 1.  According
to direction of major axis :
Ø Horizontal-
 centre lathe, horizontal boring machine
etc.

Ø  Vertical – vertical lathe, vertical axis
milling machine etc.

Ø  Inclined – special ( e.g. for transfer
machines).   

Ø General
purpose – e.g. centre lathes, milling machines, drilling machines etc.

Ø Single
purpose – e.g. facing lathe, roll turning lathe etc.

Ø Special
purpose – for mass production

3.    
 According to degree of automation:
Ø Non-automatic
– e.g. centre lathes, drilling machines etc.

Ø Semi-automatic
– capstan lathe, turret lathe, hobbling machine etc.

Ø  Automatic – e.g., single spindle automatic
lathe, Swiss type automatic lathe, CNC milling machine etc.

4.    
 According to size :

Ø Heavyduty – e.g., heavy duty lathes (e.g. ≥ 55 kW), boring mills, planning machine,
horizontal boring machine etc.

Ø Medium
duty – e.g., lathes – 3.7 ~ 11 kW, column drilling machines, milling machines
etc.

Ø Small
duty – e.g., table top lathes, drilling machines, milling machines.

Ø Micro
duty – e.g., micro-drilling machine etc.

5.    
According to precision :

Ø ordinary
– e.g., automatic lathes

Ø high
precision – e.g., Swiss type automatic lathes


6.    
 According to number of spindles :

Ø Single
spindle – centre lathes, capstan lathes, milling machines etc.

Ø  Multi-spindle – multi spindle (2 to 8) lathes,
gang drilling machines etc.

7.    
According to blank type :

Ø bar
type (lathes)

Ø  chucking type (lathes)

Ø housing
type


8.    
 According to type of automation :

Ø fixed
automation – e.g., single spindle and multi spindle lathes

Ø flexible
automation – e.g., CNC milling machine

9.    
According to configuration :

Ø Stand
alone type – most of the conventional machine tools.

Ø machining
system (more versatile) – e.g., transfer machine, machining canter, FMS etc.




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