IPE 401-Drive System

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MACHINE TOOLGear drive system

Cone pulley drive

Can Absorb shock High mechanical efficiency Smooth running

Large number of step is not availableTime for setting speed is high

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1 1

1

1II I

I II

n di

n d= =

2 2

2

2II I

I II

n di

n d= =

1 1

1

1n n

n

II In

I II

n di

n d- -

-

- = =

1

11

1 2

.

,

n n

n n

I IIn

n I II

d dii d d

So Q Q

f

f

-

--

= =

+ =

1 1

1

1n n

n

II In

I II

n di

n d- -

-

- = =

Properties of Cone Pulley drive If the central distance of the two cone

pulley is larger than and summation of diameter pair is constant then the belt remain tight for all position.

Transmitted power varies with different belt position. To avoid much variation of power and toque, the drive should be designed so that

max min10( )d d-

max

min2d d

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ADVANTAGES OF ALL-GEAR SPINDLE DRIVEOVER CONE PULLEY DRIVE.

High power transmission.

Quick speed change though levers.

compact and require less floor space.

METHOD OF SPEED CHANGING Slip gear

The mating gear pair on two adjacent shaft areinterchanged or replaced by another pair ofgears. The condition for the interchangeability-

1 2 3 4 5 6T T T T T T+ = + = +

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SLIDING KEY METHOD Two sets of gear on two shaft are constantly in

mesh. One set is free to rotate on the shaft. Only one gear of free set is engaged by a sliding key.

TUMBLER GEAR A number of gear is placed in one shaft which is at

fixed distance from the output shaft. Used usually for feed drives an known Norton gearbox.

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SLIDING TYPE CLUSTER GEAR A set of cluster gear is moved along a shaft to

engage another set of gears (one gear cluster is fixed at a time).

JAW CLUTCHES Speed can be changed by

engaging and disengaging clutches with levers.

Advantages of this speed changing method- They require small axial

movement. Helical and herringbone gear

can be used. Force required to shift them

is less than that for sliding cluster gear.

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FRICTION CLUTCHES Limiting torque capacity High torque capacity large axial and radial dimension

TYPE OF FEED GEAR BOX Feed gearbox with slip gears Feed gearbox with slip gear quadrant feed gearbox with sliding gears Feed gearbox with sliding key Norton gearbox Meander gearbox

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INFINITELY VARIABLE DRIVE Advantages possible to attain optimum cutting condition Important in reduction of handling time, because

speed, feed can be changed without stopping the machine.

Constant cutting speed can be obtained for stepped shaft and irregular contour.

Tool life is improved and high surface finish. Reduce vibration and noiseless.

MECHANICAL INFINITELY VARIABLEDRIVE Through the axial displacement of roller A, the

effective diameter of roller B is varied infinitely and thus the transmission ratio, i is changed continuously, ri

R=

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WUELFEL KOPP TOURATOR

Honda roller based CVT

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P.I.V(POSITIVE INFINITELY VARIABLE) DRIVE


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HYDRAULIC DRIVE SYSTEM Used pressurized oil to transmit energy Higher the viscosity index, better the oil thinner the oil higher the leakage problem but

lower energy loss in pipe lines and valves. Other fluid properties: Compressibility Stable chemical composition Low moisture content Low coefficient of thermal expansion Low air inclusion

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GEAR PUMP(INTERNAL)

GEAR PUMP(EXTERNAL)

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GEAR PUMP FLOW RATE

( ) ( )

( )

( )

2 2

2

12 . 2 24 2 10008 . ..

4 1000

/ min500

/ min500

bmQ d m d m

dm b nQ

dmbnQ l

Tm bnQ l

p

p

p

p

= + - -

=

=

=

Q= Theoretical Flow rate(l/min)d= Pitch diameter(cm)m= Module(cm)b=gear width(cm)n=gear speed(rpm)T=Number of teeth of gear

. .10 ( )60.75.Q pP hp

h=

P=Power of the electric motorp=Delivery Pressure= Mechanical efficiency=0.6-0.8

Screw Pump

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Screw Pump Supply rate varies from 3-5000 l/min Speed 1500-300 rpm Working pressure 10-15 x 10^5 pascal (low pressure) 30-60 x 10^5 pascal (medium pressure) 60-175 x 10^5 pascal (high pressure)

Vane pump Vanes are subjected to side wise thrust Frictional loss (fric coeff = 0.7-0.75) Necessary to maintain low eddy loss and low temperature

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Piston pump Radial Piston pump

Maximum supply rate 500 l/min

High oil pressure can be obtained(150 x 10^5 pascal)

Piston pump Axial piston pump Cylinder body remain static Movement of piston is controlled by swash plate Torque is transmitted through universal joint thus

limited

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Number of vanes and pistons

Frost-Enor Drive Consists of A hydraulic vane pump A hydraulic motor A casing Oil supply line

Derive the expression of speed, power and torque for primary and secondary control of a Frost-Enor Drive

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Hydraulic cylinders Convert the hydraulic

energy of a fluid into the kinetic energy of piston.

Consist of Hydraulic pump Fluid distributing device Cylinder with piston and

piston rod

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IPE 401-Drive System