What is milling machine full details of milling machine ?

MILLING MACHINE .



Milling machine are employed for maching  flat surface contour surface , external  ,internal threads & helical surface of various cross section .


PRINCIPLE OF MILLING MACHINE .


A milling machine is a power driven machine 

The metal is cut by mines of multy tooth rotating cutter .

For cutting operation the work piece is feed against  the rotating cutter .

As the work piece moves against the cutting edge of the rotating cutter .

The work to be machined is held in a vice a three jaw chuck , An index head , A rotating table between the centres bolted to a machine table .

The speed of the cutting tool and the rate at which the work piece travel is dependent upon the kind of material beinged .




TYPES OF MILLING MACHINE .



According to design the different types of milling machine such as :-



(1)  Column and knee type milling machine .
      (a) Hand Miller 
      (b) Plane milling machine 
      (C) Universal milling machine
      (d) Vertical milling machine .
      
(2) Planer milling machine .
(3) Fixed bed type ar manufacturing type milling machine .
    
         (a) Simplex milling machine .
         (b) Duplex milling machine .
         (c) Triplex milling machine .
    


  (4) Maching centre machine .

  (5) Special purpose milling machine .

        (a) Rotating type milling machine
         (b) Planetary type milling machine 
         (c) Profile milling machine 
         (d) Duplicating milling machine 
         (e) Pontograph  milling machine
         (f) Continuous milling machine.



MILLING MACHINE WORKPIECE HOLDING DEVICE .


The work piece is can be milled on a milling machine veary in size from smaller to larger .

The mejority of the work piece are in the 2.5 kg to 225kg range .

The proper method holding the work piece for milling is governed by the work .

      (1) Size of the work 
      (2) Shape the work
      (3) The nature of the milling                                 operation
       (4) The number of parts to be                               produce 
        

The work piece mounted on the milling machine table because the greter thrust produce by the rotating milling cutter can damage the work piece on the machine .

There are various methods of mounting the work piece on the milling machine for maching.


    (1) Holding in vice 
    (2) Fixed to angle plate 
    (3) In a chuck 
    (4) In a milling fixtures
    (5) Between centres on the rotating ar              tilting table 

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