column and knee type milling

8/8/2019 Column and Knee Type Milling

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1. Column and knee type

2. Manufacturing or Fixed bed type

3.

Planer type4. Special purpose type


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a. Hand milling machine

b. Horizontal milling machine

c.

Vertical milling machined. Universal milling machine

e. Omniversal milling machine


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a. Simplex type

b. Duplex type

c.

Triplex type


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a. Rotary table milling

b. Drum milling

c.

Profiling millingd. Tracer controlled milling


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It is simplest and small insize

All operation are

performed by hand exceptthe rotation of arbor

It is used for producingsmall components likehexagonal heads on bolts,cutting slots on screwheads ,cutting key ways


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It is horizontal milling, becausethe position of cutter spindle ishorizontal

In this machine vertical column

serves as a housing forelectricals, spindle bearings etc

Knee projects from column andit supports to saddle,table

Table can give three motions

i. Longitudinal motionii. Transverse motion

iii. Vertical motion


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It derives its name from thevertical position of cutterspindle

The overarm in this machine ismade integral with column andcarries a fixed head

Table movements arehorizontal, transverse and

vertical We can perform drilling, facing

and boring

Generally it is used for endmilling and face milling


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After lathe it is the most usefulmachine tool and it is capable ofperforming most machineoperations

It is similar to the horizontalmilling machine

The difference is table placed onthe swivel plate

By that we can give one moreadditional movement to thesaddle in horizontal plane

It is used for helical gears andspiral flutes and grooves


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It is modified form of plainmilling machine and isprovided with two spindles

One is horizontal like plainmilling, another is carried by a

universal swivelling head This is fixed in vertical position It carries two more adjustments

in addition to all the possiblemotions in universal millingmachine

Special features that variousoperations are carried out indifferent planes and at differentangles in without disturbingthe work


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It differs from the column and knee typemilling that here table is mounted on a fixedbed instead of saddle and knee

It has only one spindle in horizontal position

It gives longitudinal motion to spindle andcolumn will move in vertical direction

This is used for mass production by using withcarbide cutters and requires huge power


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It has two spindles fixedon both sides of table

This machines are less

flexible the column andknee type ,becauseautomatic feed is essential

Table will withstand longtime for heavy loads

It is used for largeproduction


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Actually it is planeradopted for doingmilling

In planer variable tablefeeding movements but

here the rotating cutter

Transverse and verticalmovements areprovided

It is used for milling onvery big jobs


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This machine haverotary feeding circulartable

I

t consists of twovertical spindles eachequipped with afacing mill

This machine is fast

on operation but islimited to milling ofthe flat surfaces


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This machine has avertical central drumwhich rotates on ahorizontal axis

For end facing ,these aretwice as productive asrotary mills

In operation drumrotates slowly carry thework against therotating cutters

Automobile cylinderheads and small shaftsare milled


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In appearance it isvertical spindlemachine

It has one to fourcutter spindles

We can performoperation in two

dimensions


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This machine is best forproducing verycomplicated parts

It has copying

capabilities throughtracer control

On this machine we canperform job in moredirections

We can producecomplex shapes likecams , dies, molds etc

column and knee type milling

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